mbed library sources
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targets/cmsis/TARGET_STM/TARGET_STM32F3XX/stm32f30x_spi.c@155:8435094ec241, 2014-04-08 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Apr 08 09:15:06 2014 +0100
- Revision:
- 155:8435094ec241
Synchronized with git revision d616c415fc62f490b915ff0ff39c8d24b2917c0f
Full URL: https://github.com/mbedmicro/mbed/commit/d616c415fc62f490b915ff0ff39c8d24b2917c0f/
[STM32F3XX] Initial port
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 155:8435094ec241 | 1 | /** |
mbed_official | 155:8435094ec241 | 2 | ****************************************************************************** |
mbed_official | 155:8435094ec241 | 3 | * @file stm32f30x_spi.c |
mbed_official | 155:8435094ec241 | 4 | * @author MCD Application Team |
mbed_official | 155:8435094ec241 | 5 | * @version V1.1.0 |
mbed_official | 155:8435094ec241 | 6 | * @date 27-February-2014 |
mbed_official | 155:8435094ec241 | 7 | * @brief This file provides firmware functions to manage the following |
mbed_official | 155:8435094ec241 | 8 | * functionalities of the Serial peripheral interface (SPI): |
mbed_official | 155:8435094ec241 | 9 | * + Initialization and Configuration |
mbed_official | 155:8435094ec241 | 10 | * + Data transfers functions |
mbed_official | 155:8435094ec241 | 11 | * + Hardware CRC Calculation |
mbed_official | 155:8435094ec241 | 12 | * + DMA transfers management |
mbed_official | 155:8435094ec241 | 13 | * + Interrupts and flags management |
mbed_official | 155:8435094ec241 | 14 | * |
mbed_official | 155:8435094ec241 | 15 | * @verbatim |
mbed_official | 155:8435094ec241 | 16 | |
mbed_official | 155:8435094ec241 | 17 | |
mbed_official | 155:8435094ec241 | 18 | =============================================================================== |
mbed_official | 155:8435094ec241 | 19 | ##### How to use this driver ##### |
mbed_official | 155:8435094ec241 | 20 | =============================================================================== |
mbed_official | 155:8435094ec241 | 21 | [..] |
mbed_official | 155:8435094ec241 | 22 | (#) Enable peripheral clock using RCC_APBPeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE) |
mbed_official | 155:8435094ec241 | 23 | function for SPI1 or using RCC_APBPeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE) |
mbed_official | 155:8435094ec241 | 24 | function for SPI2. |
mbed_official | 155:8435094ec241 | 25 | (#) Enable SCK, MOSI, MISO and NSS GPIO clocks using RCC_AHBPeriphClockCmd() |
mbed_official | 155:8435094ec241 | 26 | function. |
mbed_official | 155:8435094ec241 | 27 | (#) Peripherals alternate function: |
mbed_official | 155:8435094ec241 | 28 | (++) Connect the pin to the desired peripherals' Alternate |
mbed_official | 155:8435094ec241 | 29 | Function (AF) using GPIO_PinAFConfig() function. |
mbed_official | 155:8435094ec241 | 30 | (++) Configure the desired pin in alternate function by: |
mbed_official | 155:8435094ec241 | 31 | GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF. |
mbed_official | 155:8435094ec241 | 32 | (++) Select the type, pull-up/pull-down and output speed via |
mbed_official | 155:8435094ec241 | 33 | GPIO_PuPd, GPIO_OType and GPIO_Speed members. |
mbed_official | 155:8435094ec241 | 34 | (++) Call GPIO_Init() function. |
mbed_official | 155:8435094ec241 | 35 | (#) Program the Polarity, Phase, First Data, Baud Rate Prescaler, Slave |
mbed_official | 155:8435094ec241 | 36 | Management, Peripheral Mode and CRC Polynomial values using the SPI_Init() |
mbed_official | 155:8435094ec241 | 37 | function in SPI mode. In I2S mode, program the Mode, Standard, Data Format, |
mbed_official | 155:8435094ec241 | 38 | MCLK Output, Audio frequency and Polarity using I2S_Init() function. |
mbed_official | 155:8435094ec241 | 39 | (#) Configure the FIFO threshold using SPI_RxFIFOThresholdConfig() to select |
mbed_official | 155:8435094ec241 | 40 | at which threshold the RXNE event is generated. |
mbed_official | 155:8435094ec241 | 41 | (#) Enable the NVIC and the corresponding interrupt using the function |
mbed_official | 155:8435094ec241 | 42 | SPI_I2S_ITConfig() if you need to use interrupt mode. |
mbed_official | 155:8435094ec241 | 43 | (#) When using the DMA mode |
mbed_official | 155:8435094ec241 | 44 | (++) Configure the DMA using DMA_Init() function. |
mbed_official | 155:8435094ec241 | 45 | (++) Active the needed channel Request using SPI_I2S_DMACmd() function. |
mbed_official | 155:8435094ec241 | 46 | (#) Enable the SPI using the SPI_Cmd() function or enable the I2S using |
mbed_official | 155:8435094ec241 | 47 | I2S_Cmd(). |
mbed_official | 155:8435094ec241 | 48 | (#) Enable the DMA using the DMA_Cmd() function when using DMA mode. |
mbed_official | 155:8435094ec241 | 49 | (#) Optionally you can enable/configure the following parameters without |
mbed_official | 155:8435094ec241 | 50 | re-initialization (i.e there is no need to call again SPI_Init() function): |
mbed_official | 155:8435094ec241 | 51 | (++) When bidirectional mode (SPI_Direction_1Line_Rx or SPI_Direction_1Line_Tx) |
mbed_official | 155:8435094ec241 | 52 | is programmed as Data direction parameter using the SPI_Init() function |
mbed_official | 155:8435094ec241 | 53 | it can be possible to switch between SPI_Direction_Tx or SPI_Direction_Rx |
mbed_official | 155:8435094ec241 | 54 | using the SPI_BiDirectionalLineConfig() function. |
mbed_official | 155:8435094ec241 | 55 | (++) When SPI_NSS_Soft is selected as Slave Select Management parameter |
mbed_official | 155:8435094ec241 | 56 | using the SPI_Init() function it can be possible to manage the |
mbed_official | 155:8435094ec241 | 57 | NSS internal signal using the SPI_NSSInternalSoftwareConfig() function. |
mbed_official | 155:8435094ec241 | 58 | (++) Reconfigure the data size using the SPI_DataSizeConfig() function. |
mbed_official | 155:8435094ec241 | 59 | (++) Enable or disable the SS output using the SPI_SSOutputCmd() function. |
mbed_official | 155:8435094ec241 | 60 | (#) To use the CRC Hardware calculation feature refer to the Peripheral |
mbed_official | 155:8435094ec241 | 61 | CRC hardware Calculation subsection. |
mbed_official | 155:8435094ec241 | 62 | [..] It is possible to use SPI in I2S full duplex mode, in this case, each SPI |
mbed_official | 155:8435094ec241 | 63 | peripheral is able to manage sending and receiving data simultaneously |
mbed_official | 155:8435094ec241 | 64 | using two data lines. Each SPI peripheral has an extended block called I2Sxext |
mbed_official | 155:8435094ec241 | 65 | (ie. I2S2ext for SPI2 and I2S3ext for SPI3). |
mbed_official | 155:8435094ec241 | 66 | The extension block is not a full SPI IP, it is used only as I2S slave to |
mbed_official | 155:8435094ec241 | 67 | implement full duplex mode. The extension block uses the same clock sources |
mbed_official | 155:8435094ec241 | 68 | as its master. |
mbed_official | 155:8435094ec241 | 69 | To configure I2S full duplex you have to: |
mbed_official | 155:8435094ec241 | 70 | (#) Configure SPIx in I2S mode (I2S_Init() function) as described above. |
mbed_official | 155:8435094ec241 | 71 | (#) Call the I2S_FullDuplexConfig() function using the same strucutre passed to |
mbed_official | 155:8435094ec241 | 72 | I2S_Init() function. |
mbed_official | 155:8435094ec241 | 73 | (#) Call I2S_Cmd() for SPIx then for its extended block. |
mbed_official | 155:8435094ec241 | 74 | (#) Configure interrupts or DMA requests and to get/clear flag status, |
mbed_official | 155:8435094ec241 | 75 | use I2Sxext instance for the extension block. |
mbed_official | 155:8435094ec241 | 76 | [..] Functions that can be called with I2Sxext instances are: |
mbed_official | 155:8435094ec241 | 77 | I2S_Cmd(), I2S_FullDuplexConfig(), SPI_I2S_ReceiveData16(), SPI_I2S_SendData16(), |
mbed_official | 155:8435094ec241 | 78 | SPI_I2S_DMACmd(), SPI_I2S_ITConfig(), SPI_I2S_GetFlagStatus(), SPI_I2S_ClearFlag(), |
mbed_official | 155:8435094ec241 | 79 | SPI_I2S_GetITStatus() and SPI_I2S_ClearITPendingBit(). |
mbed_official | 155:8435094ec241 | 80 | [..] Example: To use SPI3 in Full duplex mode (SPI3 is Master Tx, I2S3ext is Slave Rx): |
mbed_official | 155:8435094ec241 | 81 | [..] RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE); |
mbed_official | 155:8435094ec241 | 82 | I2S_StructInit(&I2SInitStruct); |
mbed_official | 155:8435094ec241 | 83 | I2SInitStruct.Mode = I2S_Mode_MasterTx; |
mbed_official | 155:8435094ec241 | 84 | I2S_Init(SPI3, &I2SInitStruct); |
mbed_official | 155:8435094ec241 | 85 | I2S_FullDuplexConfig(SPI3ext, &I2SInitStruct) |
mbed_official | 155:8435094ec241 | 86 | I2S_Cmd(SPI3, ENABLE); |
mbed_official | 155:8435094ec241 | 87 | I2S_Cmd(SPI3ext, ENABLE); |
mbed_official | 155:8435094ec241 | 88 | ... |
mbed_official | 155:8435094ec241 | 89 | while (SPI_I2S_GetFlagStatus(SPI2, SPI_FLAG_TXE) == RESET) |
mbed_official | 155:8435094ec241 | 90 | {} |
mbed_official | 155:8435094ec241 | 91 | SPI_I2S_SendData16(SPI3, txdata[i]); |
mbed_official | 155:8435094ec241 | 92 | ... |
mbed_official | 155:8435094ec241 | 93 | while (SPI_I2S_GetFlagStatus(I2S3ext, SPI_FLAG_RXNE) == RESET) |
mbed_official | 155:8435094ec241 | 94 | {} |
mbed_official | 155:8435094ec241 | 95 | rxdata[i] = SPI_I2S_ReceiveData16(I2S3ext); |
mbed_official | 155:8435094ec241 | 96 | ... |
mbed_official | 155:8435094ec241 | 97 | [..] |
mbed_official | 155:8435094ec241 | 98 | (@) In SPI mode: To use the SPI TI mode, call the function SPI_TIModeCmd() |
mbed_official | 155:8435094ec241 | 99 | just after calling the function SPI_Init(). |
mbed_official | 155:8435094ec241 | 100 | |
mbed_official | 155:8435094ec241 | 101 | @endverbatim |
mbed_official | 155:8435094ec241 | 102 | ****************************************************************************** |
mbed_official | 155:8435094ec241 | 103 | * @attention |
mbed_official | 155:8435094ec241 | 104 | * |
mbed_official | 155:8435094ec241 | 105 | * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> |
mbed_official | 155:8435094ec241 | 106 | * |
mbed_official | 155:8435094ec241 | 107 | * Redistribution and use in source and binary forms, with or without modification, |
mbed_official | 155:8435094ec241 | 108 | * are permitted provided that the following conditions are met: |
mbed_official | 155:8435094ec241 | 109 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 155:8435094ec241 | 110 | * this list of conditions and the following disclaimer. |
mbed_official | 155:8435094ec241 | 111 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 155:8435094ec241 | 112 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 155:8435094ec241 | 113 | * and/or other materials provided with the distribution. |
mbed_official | 155:8435094ec241 | 114 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 155:8435094ec241 | 115 | * may be used to endorse or promote products derived from this software |
mbed_official | 155:8435094ec241 | 116 | * without specific prior written permission. |
mbed_official | 155:8435094ec241 | 117 | * |
mbed_official | 155:8435094ec241 | 118 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 155:8435094ec241 | 119 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 155:8435094ec241 | 120 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 155:8435094ec241 | 121 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 155:8435094ec241 | 122 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 155:8435094ec241 | 123 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 155:8435094ec241 | 124 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 155:8435094ec241 | 125 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 155:8435094ec241 | 126 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 155:8435094ec241 | 127 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 155:8435094ec241 | 128 | * |
mbed_official | 155:8435094ec241 | 129 | ****************************************************************************** |
mbed_official | 155:8435094ec241 | 130 | */ |
mbed_official | 155:8435094ec241 | 131 | |
mbed_official | 155:8435094ec241 | 132 | /* Includes ------------------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 133 | #include "stm32f30x_spi.h" |
mbed_official | 155:8435094ec241 | 134 | #include "stm32f30x_rcc.h" |
mbed_official | 155:8435094ec241 | 135 | |
mbed_official | 155:8435094ec241 | 136 | /** @addtogroup STM32F30x_StdPeriph_Driver |
mbed_official | 155:8435094ec241 | 137 | * @{ |
mbed_official | 155:8435094ec241 | 138 | */ |
mbed_official | 155:8435094ec241 | 139 | |
mbed_official | 155:8435094ec241 | 140 | /** @defgroup SPI |
mbed_official | 155:8435094ec241 | 141 | * @brief SPI driver modules |
mbed_official | 155:8435094ec241 | 142 | * @{ |
mbed_official | 155:8435094ec241 | 143 | */ |
mbed_official | 155:8435094ec241 | 144 | |
mbed_official | 155:8435094ec241 | 145 | /* Private typedef -----------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 146 | /* Private define ------------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 147 | /* SPI registers Masks */ |
mbed_official | 155:8435094ec241 | 148 | #define CR1_CLEAR_MASK ((uint16_t)0x3040) |
mbed_official | 155:8435094ec241 | 149 | #define CR2_LDMA_MASK ((uint16_t)0x9FFF) |
mbed_official | 155:8435094ec241 | 150 | |
mbed_official | 155:8435094ec241 | 151 | #define I2SCFGR_CLEAR_MASK ((uint16_t)0xF040) |
mbed_official | 155:8435094ec241 | 152 | |
mbed_official | 155:8435094ec241 | 153 | /* Private macro -------------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 154 | /* Private variables ---------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 155 | /* Private function prototypes -----------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 156 | /* Private functions ---------------------------------------------------------*/ |
mbed_official | 155:8435094ec241 | 157 | |
mbed_official | 155:8435094ec241 | 158 | /** @defgroup SPI_Private_Functions |
mbed_official | 155:8435094ec241 | 159 | * @{ |
mbed_official | 155:8435094ec241 | 160 | */ |
mbed_official | 155:8435094ec241 | 161 | |
mbed_official | 155:8435094ec241 | 162 | /** @defgroup SPI_Group1 Initialization and Configuration functions |
mbed_official | 155:8435094ec241 | 163 | * @brief Initialization and Configuration functions |
mbed_official | 155:8435094ec241 | 164 | * |
mbed_official | 155:8435094ec241 | 165 | @verbatim |
mbed_official | 155:8435094ec241 | 166 | =============================================================================== |
mbed_official | 155:8435094ec241 | 167 | ##### Initialization and Configuration functions ##### |
mbed_official | 155:8435094ec241 | 168 | =============================================================================== |
mbed_official | 155:8435094ec241 | 169 | [..] This section provides a set of functions allowing to initialize the SPI Direction, |
mbed_official | 155:8435094ec241 | 170 | SPI Mode, SPI Data Size, SPI Polarity, SPI Phase, SPI NSS Management, SPI Baud |
mbed_official | 155:8435094ec241 | 171 | Rate Prescaler, SPI First Bit and SPI CRC Polynomial. |
mbed_official | 155:8435094ec241 | 172 | [..] The SPI_Init() function follows the SPI configuration procedures for Master mode |
mbed_official | 155:8435094ec241 | 173 | and Slave mode (details for these procedures are available in reference manual). |
mbed_official | 155:8435094ec241 | 174 | [..] When the Software NSS management (SPI_InitStruct->SPI_NSS = SPI_NSS_Soft) is selected, |
mbed_official | 155:8435094ec241 | 175 | use the following function to manage the NSS bit: |
mbed_official | 155:8435094ec241 | 176 | void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, uint16_t SPI_NSSInternalSoft); |
mbed_official | 155:8435094ec241 | 177 | [..] In Master mode, when the Hardware NSS management (SPI_InitStruct->SPI_NSS = SPI_NSS_Hard) |
mbed_official | 155:8435094ec241 | 178 | is selected, use the follwoing function to enable the NSS output feature. |
mbed_official | 155:8435094ec241 | 179 | void SPI_SSOutputCmd(SPI_TypeDef* SPIx, FunctionalState NewState); |
mbed_official | 155:8435094ec241 | 180 | [..] The NSS pulse mode can be managed by the SPI TI mode when enabling it using the |
mbed_official | 155:8435094ec241 | 181 | following function: void SPI_TIModeCmd(SPI_TypeDef* SPIx, FunctionalState NewState); |
mbed_official | 155:8435094ec241 | 182 | And it can be managed by software in the SPI Motorola mode using this function: |
mbed_official | 155:8435094ec241 | 183 | void SPI_NSSPulseModeCmd(SPI_TypeDef* SPIx, FunctionalState NewState); |
mbed_official | 155:8435094ec241 | 184 | [..] This section provides also functions to initialize the I2S Mode, Standard, |
mbed_official | 155:8435094ec241 | 185 | Data Format, MCLK Output, Audio frequency and Polarity. |
mbed_official | 155:8435094ec241 | 186 | [..] The I2S_Init() function follows the I2S configuration procedures for Master mode |
mbed_official | 155:8435094ec241 | 187 | and Slave mode. |
mbed_official | 155:8435094ec241 | 188 | |
mbed_official | 155:8435094ec241 | 189 | @endverbatim |
mbed_official | 155:8435094ec241 | 190 | * @{ |
mbed_official | 155:8435094ec241 | 191 | */ |
mbed_official | 155:8435094ec241 | 192 | |
mbed_official | 155:8435094ec241 | 193 | /** |
mbed_official | 155:8435094ec241 | 194 | * @brief Deinitializes the SPIx peripheral registers to their default |
mbed_official | 155:8435094ec241 | 195 | * reset values. |
mbed_official | 155:8435094ec241 | 196 | * @param SPIx: To select the SPIx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 197 | * in SPI mode. |
mbed_official | 155:8435094ec241 | 198 | * @retval None |
mbed_official | 155:8435094ec241 | 199 | */ |
mbed_official | 155:8435094ec241 | 200 | void SPI_I2S_DeInit(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 201 | { |
mbed_official | 155:8435094ec241 | 202 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 203 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 204 | |
mbed_official | 155:8435094ec241 | 205 | if (SPIx == SPI1) |
mbed_official | 155:8435094ec241 | 206 | { |
mbed_official | 155:8435094ec241 | 207 | /* Enable SPI1 reset state */ |
mbed_official | 155:8435094ec241 | 208 | RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE); |
mbed_official | 155:8435094ec241 | 209 | /* Release SPI1 from reset state */ |
mbed_official | 155:8435094ec241 | 210 | RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE); |
mbed_official | 155:8435094ec241 | 211 | } |
mbed_official | 155:8435094ec241 | 212 | else if (SPIx == SPI2) |
mbed_official | 155:8435094ec241 | 213 | { |
mbed_official | 155:8435094ec241 | 214 | /* Enable SPI2 reset state */ |
mbed_official | 155:8435094ec241 | 215 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE); |
mbed_official | 155:8435094ec241 | 216 | /* Release SPI2 from reset state */ |
mbed_official | 155:8435094ec241 | 217 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE); |
mbed_official | 155:8435094ec241 | 218 | } |
mbed_official | 155:8435094ec241 | 219 | else |
mbed_official | 155:8435094ec241 | 220 | { |
mbed_official | 155:8435094ec241 | 221 | if (SPIx == SPI3) |
mbed_official | 155:8435094ec241 | 222 | { |
mbed_official | 155:8435094ec241 | 223 | /* Enable SPI3 reset state */ |
mbed_official | 155:8435094ec241 | 224 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, ENABLE); |
mbed_official | 155:8435094ec241 | 225 | /* Release SPI3 from reset state */ |
mbed_official | 155:8435094ec241 | 226 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3, DISABLE); |
mbed_official | 155:8435094ec241 | 227 | } |
mbed_official | 155:8435094ec241 | 228 | } |
mbed_official | 155:8435094ec241 | 229 | } |
mbed_official | 155:8435094ec241 | 230 | |
mbed_official | 155:8435094ec241 | 231 | /** |
mbed_official | 155:8435094ec241 | 232 | * @brief Fills each SPI_InitStruct member with its default value. |
mbed_official | 155:8435094ec241 | 233 | * @param SPI_InitStruct: pointer to a SPI_InitTypeDef structure which will be initialized. |
mbed_official | 155:8435094ec241 | 234 | * @retval None |
mbed_official | 155:8435094ec241 | 235 | */ |
mbed_official | 155:8435094ec241 | 236 | void SPI_StructInit(SPI_InitTypeDef* SPI_InitStruct) |
mbed_official | 155:8435094ec241 | 237 | { |
mbed_official | 155:8435094ec241 | 238 | /*--------------- Reset SPI init structure parameters values -----------------*/ |
mbed_official | 155:8435094ec241 | 239 | /* Initialize the SPI_Direction member */ |
mbed_official | 155:8435094ec241 | 240 | SPI_InitStruct->SPI_Direction = SPI_Direction_2Lines_FullDuplex; |
mbed_official | 155:8435094ec241 | 241 | /* Initialize the SPI_Mode member */ |
mbed_official | 155:8435094ec241 | 242 | SPI_InitStruct->SPI_Mode = SPI_Mode_Slave; |
mbed_official | 155:8435094ec241 | 243 | /* Initialize the SPI_DataSize member */ |
mbed_official | 155:8435094ec241 | 244 | SPI_InitStruct->SPI_DataSize = SPI_DataSize_8b; |
mbed_official | 155:8435094ec241 | 245 | /* Initialize the SPI_CPOL member */ |
mbed_official | 155:8435094ec241 | 246 | SPI_InitStruct->SPI_CPOL = SPI_CPOL_Low; |
mbed_official | 155:8435094ec241 | 247 | /* Initialize the SPI_CPHA member */ |
mbed_official | 155:8435094ec241 | 248 | SPI_InitStruct->SPI_CPHA = SPI_CPHA_1Edge; |
mbed_official | 155:8435094ec241 | 249 | /* Initialize the SPI_NSS member */ |
mbed_official | 155:8435094ec241 | 250 | SPI_InitStruct->SPI_NSS = SPI_NSS_Hard; |
mbed_official | 155:8435094ec241 | 251 | /* Initialize the SPI_BaudRatePrescaler member */ |
mbed_official | 155:8435094ec241 | 252 | SPI_InitStruct->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; |
mbed_official | 155:8435094ec241 | 253 | /* Initialize the SPI_FirstBit member */ |
mbed_official | 155:8435094ec241 | 254 | SPI_InitStruct->SPI_FirstBit = SPI_FirstBit_MSB; |
mbed_official | 155:8435094ec241 | 255 | /* Initialize the SPI_CRCPolynomial member */ |
mbed_official | 155:8435094ec241 | 256 | SPI_InitStruct->SPI_CRCPolynomial = 7; |
mbed_official | 155:8435094ec241 | 257 | } |
mbed_official | 155:8435094ec241 | 258 | |
mbed_official | 155:8435094ec241 | 259 | /** |
mbed_official | 155:8435094ec241 | 260 | * @brief Initializes the SPIx peripheral according to the specified |
mbed_official | 155:8435094ec241 | 261 | * parameters in the SPI_InitStruct. |
mbed_official | 155:8435094ec241 | 262 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 263 | * @param SPI_InitStruct: pointer to a SPI_InitTypeDef structure that |
mbed_official | 155:8435094ec241 | 264 | * contains the configuration information for the specified SPI peripheral. |
mbed_official | 155:8435094ec241 | 265 | * @retval None |
mbed_official | 155:8435094ec241 | 266 | */ |
mbed_official | 155:8435094ec241 | 267 | void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct) |
mbed_official | 155:8435094ec241 | 268 | { |
mbed_official | 155:8435094ec241 | 269 | uint16_t tmpreg = 0; |
mbed_official | 155:8435094ec241 | 270 | |
mbed_official | 155:8435094ec241 | 271 | /* check the parameters */ |
mbed_official | 155:8435094ec241 | 272 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 273 | |
mbed_official | 155:8435094ec241 | 274 | /* Check the SPI parameters */ |
mbed_official | 155:8435094ec241 | 275 | assert_param(IS_SPI_DIRECTION_MODE(SPI_InitStruct->SPI_Direction)); |
mbed_official | 155:8435094ec241 | 276 | assert_param(IS_SPI_MODE(SPI_InitStruct->SPI_Mode)); |
mbed_official | 155:8435094ec241 | 277 | assert_param(IS_SPI_DATA_SIZE(SPI_InitStruct->SPI_DataSize)); |
mbed_official | 155:8435094ec241 | 278 | assert_param(IS_SPI_CPOL(SPI_InitStruct->SPI_CPOL)); |
mbed_official | 155:8435094ec241 | 279 | assert_param(IS_SPI_CPHA(SPI_InitStruct->SPI_CPHA)); |
mbed_official | 155:8435094ec241 | 280 | assert_param(IS_SPI_NSS(SPI_InitStruct->SPI_NSS)); |
mbed_official | 155:8435094ec241 | 281 | assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_InitStruct->SPI_BaudRatePrescaler)); |
mbed_official | 155:8435094ec241 | 282 | assert_param(IS_SPI_FIRST_BIT(SPI_InitStruct->SPI_FirstBit)); |
mbed_official | 155:8435094ec241 | 283 | assert_param(IS_SPI_CRC_POLYNOMIAL(SPI_InitStruct->SPI_CRCPolynomial)); |
mbed_official | 155:8435094ec241 | 284 | |
mbed_official | 155:8435094ec241 | 285 | /* Configuring the SPI in master mode */ |
mbed_official | 155:8435094ec241 | 286 | if(SPI_InitStruct->SPI_Mode == SPI_Mode_Master) |
mbed_official | 155:8435094ec241 | 287 | { |
mbed_official | 155:8435094ec241 | 288 | /*---------------------------- SPIx CR1 Configuration ------------------------*/ |
mbed_official | 155:8435094ec241 | 289 | /* Get the SPIx CR1 value */ |
mbed_official | 155:8435094ec241 | 290 | tmpreg = SPIx->CR1; |
mbed_official | 155:8435094ec241 | 291 | /* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, MSTR, CPOL and CPHA bits */ |
mbed_official | 155:8435094ec241 | 292 | tmpreg &= CR1_CLEAR_MASK; |
mbed_official | 155:8435094ec241 | 293 | /* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler |
mbed_official | 155:8435094ec241 | 294 | master/slave mode, CPOL and CPHA */ |
mbed_official | 155:8435094ec241 | 295 | /* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */ |
mbed_official | 155:8435094ec241 | 296 | /* Set SSM, SSI and MSTR bits according to SPI_Mode and SPI_NSS values */ |
mbed_official | 155:8435094ec241 | 297 | /* Set LSBFirst bit according to SPI_FirstBit value */ |
mbed_official | 155:8435094ec241 | 298 | /* Set BR bits according to SPI_BaudRatePrescaler value */ |
mbed_official | 155:8435094ec241 | 299 | /* Set CPOL bit according to SPI_CPOL value */ |
mbed_official | 155:8435094ec241 | 300 | /* Set CPHA bit according to SPI_CPHA value */ |
mbed_official | 155:8435094ec241 | 301 | tmpreg |= (uint16_t)((uint16_t)(SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_Mode) | |
mbed_official | 155:8435094ec241 | 302 | (uint16_t)((uint16_t)(SPI_InitStruct->SPI_CPOL | SPI_InitStruct->SPI_CPHA) | |
mbed_official | 155:8435094ec241 | 303 | (uint16_t)((uint16_t)(SPI_InitStruct->SPI_NSS | SPI_InitStruct->SPI_BaudRatePrescaler) | |
mbed_official | 155:8435094ec241 | 304 | SPI_InitStruct->SPI_FirstBit))); |
mbed_official | 155:8435094ec241 | 305 | /* Write to SPIx CR1 */ |
mbed_official | 155:8435094ec241 | 306 | SPIx->CR1 = tmpreg; |
mbed_official | 155:8435094ec241 | 307 | /*-------------------------Data Size Configuration -----------------------*/ |
mbed_official | 155:8435094ec241 | 308 | /* Get the SPIx CR2 value */ |
mbed_official | 155:8435094ec241 | 309 | tmpreg = SPIx->CR2; |
mbed_official | 155:8435094ec241 | 310 | /* Clear DS[3:0] bits */ |
mbed_official | 155:8435094ec241 | 311 | tmpreg &= (uint16_t)~SPI_CR2_DS; |
mbed_official | 155:8435094ec241 | 312 | /* Configure SPIx: Data Size */ |
mbed_official | 155:8435094ec241 | 313 | tmpreg |= (uint16_t)(SPI_InitStruct->SPI_DataSize); |
mbed_official | 155:8435094ec241 | 314 | /* Write to SPIx CR2 */ |
mbed_official | 155:8435094ec241 | 315 | SPIx->CR2 = tmpreg; |
mbed_official | 155:8435094ec241 | 316 | } |
mbed_official | 155:8435094ec241 | 317 | /* Configuring the SPI in slave mode */ |
mbed_official | 155:8435094ec241 | 318 | else |
mbed_official | 155:8435094ec241 | 319 | { |
mbed_official | 155:8435094ec241 | 320 | /*---------------------------- Data size Configuration -----------------------*/ |
mbed_official | 155:8435094ec241 | 321 | /* Get the SPIx CR2 value */ |
mbed_official | 155:8435094ec241 | 322 | tmpreg = SPIx->CR2; |
mbed_official | 155:8435094ec241 | 323 | /* Clear DS[3:0] bits */ |
mbed_official | 155:8435094ec241 | 324 | tmpreg &= (uint16_t)~SPI_CR2_DS; |
mbed_official | 155:8435094ec241 | 325 | /* Configure SPIx: Data Size */ |
mbed_official | 155:8435094ec241 | 326 | tmpreg |= (uint16_t)(SPI_InitStruct->SPI_DataSize); |
mbed_official | 155:8435094ec241 | 327 | /* Write to SPIx CR2 */ |
mbed_official | 155:8435094ec241 | 328 | SPIx->CR2 = tmpreg; |
mbed_official | 155:8435094ec241 | 329 | /*---------------------------- SPIx CR1 Configuration ------------------------*/ |
mbed_official | 155:8435094ec241 | 330 | /* Get the SPIx CR1 value */ |
mbed_official | 155:8435094ec241 | 331 | tmpreg = SPIx->CR1; |
mbed_official | 155:8435094ec241 | 332 | /* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, MSTR, CPOL and CPHA bits */ |
mbed_official | 155:8435094ec241 | 333 | tmpreg &= CR1_CLEAR_MASK; |
mbed_official | 155:8435094ec241 | 334 | /* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler |
mbed_official | 155:8435094ec241 | 335 | master/salve mode, CPOL and CPHA */ |
mbed_official | 155:8435094ec241 | 336 | /* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */ |
mbed_official | 155:8435094ec241 | 337 | /* Set SSM, SSI and MSTR bits according to SPI_Mode and SPI_NSS values */ |
mbed_official | 155:8435094ec241 | 338 | /* Set LSBFirst bit according to SPI_FirstBit value */ |
mbed_official | 155:8435094ec241 | 339 | /* Set BR bits according to SPI_BaudRatePrescaler value */ |
mbed_official | 155:8435094ec241 | 340 | /* Set CPOL bit according to SPI_CPOL value */ |
mbed_official | 155:8435094ec241 | 341 | /* Set CPHA bit according to SPI_CPHA value */ |
mbed_official | 155:8435094ec241 | 342 | tmpreg |= (uint16_t)((uint16_t)(SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_Mode) | |
mbed_official | 155:8435094ec241 | 343 | (uint16_t)((uint16_t)(SPI_InitStruct->SPI_CPOL | SPI_InitStruct->SPI_CPHA) | |
mbed_official | 155:8435094ec241 | 344 | (uint16_t)((uint16_t)(SPI_InitStruct->SPI_NSS | SPI_InitStruct->SPI_BaudRatePrescaler) | |
mbed_official | 155:8435094ec241 | 345 | SPI_InitStruct->SPI_FirstBit))); |
mbed_official | 155:8435094ec241 | 346 | |
mbed_official | 155:8435094ec241 | 347 | /* Write to SPIx CR1 */ |
mbed_official | 155:8435094ec241 | 348 | SPIx->CR1 = tmpreg; |
mbed_official | 155:8435094ec241 | 349 | } |
mbed_official | 155:8435094ec241 | 350 | |
mbed_official | 155:8435094ec241 | 351 | /* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */ |
mbed_official | 155:8435094ec241 | 352 | SPIx->I2SCFGR &= (uint16_t)~((uint16_t)SPI_I2SCFGR_I2SMOD); |
mbed_official | 155:8435094ec241 | 353 | |
mbed_official | 155:8435094ec241 | 354 | /*---------------------------- SPIx CRCPOLY Configuration --------------------*/ |
mbed_official | 155:8435094ec241 | 355 | /* Write to SPIx CRCPOLY */ |
mbed_official | 155:8435094ec241 | 356 | SPIx->CRCPR = SPI_InitStruct->SPI_CRCPolynomial; |
mbed_official | 155:8435094ec241 | 357 | } |
mbed_official | 155:8435094ec241 | 358 | |
mbed_official | 155:8435094ec241 | 359 | /** |
mbed_official | 155:8435094ec241 | 360 | * @brief Fills each I2S_InitStruct member with its default value. |
mbed_official | 155:8435094ec241 | 361 | * @param I2S_InitStruct : pointer to a I2S_InitTypeDef structure which will be initialized. |
mbed_official | 155:8435094ec241 | 362 | * @retval None |
mbed_official | 155:8435094ec241 | 363 | */ |
mbed_official | 155:8435094ec241 | 364 | void I2S_StructInit(I2S_InitTypeDef* I2S_InitStruct) |
mbed_official | 155:8435094ec241 | 365 | { |
mbed_official | 155:8435094ec241 | 366 | /*--------------- Reset I2S init structure parameters values -----------------*/ |
mbed_official | 155:8435094ec241 | 367 | /* Initialize the I2S_Mode member */ |
mbed_official | 155:8435094ec241 | 368 | I2S_InitStruct->I2S_Mode = I2S_Mode_SlaveTx; |
mbed_official | 155:8435094ec241 | 369 | |
mbed_official | 155:8435094ec241 | 370 | /* Initialize the I2S_Standard member */ |
mbed_official | 155:8435094ec241 | 371 | I2S_InitStruct->I2S_Standard = I2S_Standard_Phillips; |
mbed_official | 155:8435094ec241 | 372 | |
mbed_official | 155:8435094ec241 | 373 | /* Initialize the I2S_DataFormat member */ |
mbed_official | 155:8435094ec241 | 374 | I2S_InitStruct->I2S_DataFormat = I2S_DataFormat_16b; |
mbed_official | 155:8435094ec241 | 375 | |
mbed_official | 155:8435094ec241 | 376 | /* Initialize the I2S_MCLKOutput member */ |
mbed_official | 155:8435094ec241 | 377 | I2S_InitStruct->I2S_MCLKOutput = I2S_MCLKOutput_Disable; |
mbed_official | 155:8435094ec241 | 378 | |
mbed_official | 155:8435094ec241 | 379 | /* Initialize the I2S_AudioFreq member */ |
mbed_official | 155:8435094ec241 | 380 | I2S_InitStruct->I2S_AudioFreq = I2S_AudioFreq_Default; |
mbed_official | 155:8435094ec241 | 381 | |
mbed_official | 155:8435094ec241 | 382 | /* Initialize the I2S_CPOL member */ |
mbed_official | 155:8435094ec241 | 383 | I2S_InitStruct->I2S_CPOL = I2S_CPOL_Low; |
mbed_official | 155:8435094ec241 | 384 | } |
mbed_official | 155:8435094ec241 | 385 | |
mbed_official | 155:8435094ec241 | 386 | /** |
mbed_official | 155:8435094ec241 | 387 | * @brief Initializes the SPIx peripheral according to the specified |
mbed_official | 155:8435094ec241 | 388 | * parameters in the I2S_InitStruct. |
mbed_official | 155:8435094ec241 | 389 | * @param SPIx:To select the SPIx peripheral, where x can be: 2 or 3 |
mbed_official | 155:8435094ec241 | 390 | * in I2S mode. |
mbed_official | 155:8435094ec241 | 391 | * @param I2S_InitStruct: pointer to an I2S_InitTypeDef structure that |
mbed_official | 155:8435094ec241 | 392 | * contains the configuration information for the specified SPI peripheral |
mbed_official | 155:8435094ec241 | 393 | * configured in I2S mode. |
mbed_official | 155:8435094ec241 | 394 | * @note |
mbed_official | 155:8435094ec241 | 395 | * The function calculates the optimal prescaler needed to obtain the most |
mbed_official | 155:8435094ec241 | 396 | * accurate audio frequency (depending on the I2S clock source, the PLL values |
mbed_official | 155:8435094ec241 | 397 | * and the product configuration). But in case the prescaler value is greater |
mbed_official | 155:8435094ec241 | 398 | * than 511, the default value (0x02) will be configured instead. |
mbed_official | 155:8435094ec241 | 399 | * @retval None |
mbed_official | 155:8435094ec241 | 400 | */ |
mbed_official | 155:8435094ec241 | 401 | void I2S_Init(SPI_TypeDef* SPIx, I2S_InitTypeDef* I2S_InitStruct) |
mbed_official | 155:8435094ec241 | 402 | { |
mbed_official | 155:8435094ec241 | 403 | uint16_t tmpreg = 0, i2sdiv = 2, i2sodd = 0, packetlength = 1; |
mbed_official | 155:8435094ec241 | 404 | uint32_t tmp = 0; |
mbed_official | 155:8435094ec241 | 405 | RCC_ClocksTypeDef RCC_Clocks; |
mbed_official | 155:8435094ec241 | 406 | uint32_t sourceclock = 0; |
mbed_official | 155:8435094ec241 | 407 | |
mbed_official | 155:8435094ec241 | 408 | /* Check the I2S parameters */ |
mbed_official | 155:8435094ec241 | 409 | assert_param(IS_SPI_23_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 410 | assert_param(IS_I2S_MODE(I2S_InitStruct->I2S_Mode)); |
mbed_official | 155:8435094ec241 | 411 | assert_param(IS_I2S_STANDARD(I2S_InitStruct->I2S_Standard)); |
mbed_official | 155:8435094ec241 | 412 | assert_param(IS_I2S_DATA_FORMAT(I2S_InitStruct->I2S_DataFormat)); |
mbed_official | 155:8435094ec241 | 413 | assert_param(IS_I2S_MCLK_OUTPUT(I2S_InitStruct->I2S_MCLKOutput)); |
mbed_official | 155:8435094ec241 | 414 | assert_param(IS_I2S_AUDIO_FREQ(I2S_InitStruct->I2S_AudioFreq)); |
mbed_official | 155:8435094ec241 | 415 | assert_param(IS_I2S_CPOL(I2S_InitStruct->I2S_CPOL)); |
mbed_official | 155:8435094ec241 | 416 | |
mbed_official | 155:8435094ec241 | 417 | /*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/ |
mbed_official | 155:8435094ec241 | 418 | /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */ |
mbed_official | 155:8435094ec241 | 419 | SPIx->I2SCFGR &= I2SCFGR_CLEAR_MASK; |
mbed_official | 155:8435094ec241 | 420 | SPIx->I2SPR = 0x0002; |
mbed_official | 155:8435094ec241 | 421 | |
mbed_official | 155:8435094ec241 | 422 | /* Get the I2SCFGR register value */ |
mbed_official | 155:8435094ec241 | 423 | tmpreg = SPIx->I2SCFGR; |
mbed_official | 155:8435094ec241 | 424 | |
mbed_official | 155:8435094ec241 | 425 | /* If the default value has to be written, reinitialize i2sdiv and i2sodd*/ |
mbed_official | 155:8435094ec241 | 426 | if(I2S_InitStruct->I2S_AudioFreq == I2S_AudioFreq_Default) |
mbed_official | 155:8435094ec241 | 427 | { |
mbed_official | 155:8435094ec241 | 428 | i2sodd = (uint16_t)0; |
mbed_official | 155:8435094ec241 | 429 | i2sdiv = (uint16_t)2; |
mbed_official | 155:8435094ec241 | 430 | } |
mbed_official | 155:8435094ec241 | 431 | /* If the requested audio frequency is not the default, compute the prescaler */ |
mbed_official | 155:8435094ec241 | 432 | else |
mbed_official | 155:8435094ec241 | 433 | { |
mbed_official | 155:8435094ec241 | 434 | /* Check the frame length (For the Prescaler computing) */ |
mbed_official | 155:8435094ec241 | 435 | if(I2S_InitStruct->I2S_DataFormat == I2S_DataFormat_16b) |
mbed_official | 155:8435094ec241 | 436 | { |
mbed_official | 155:8435094ec241 | 437 | /* Packet length is 16 bits */ |
mbed_official | 155:8435094ec241 | 438 | packetlength = 1; |
mbed_official | 155:8435094ec241 | 439 | } |
mbed_official | 155:8435094ec241 | 440 | else |
mbed_official | 155:8435094ec241 | 441 | { |
mbed_official | 155:8435094ec241 | 442 | /* Packet length is 32 bits */ |
mbed_official | 155:8435094ec241 | 443 | packetlength = 2; |
mbed_official | 155:8435094ec241 | 444 | } |
mbed_official | 155:8435094ec241 | 445 | |
mbed_official | 155:8435094ec241 | 446 | /* I2S Clock source is System clock: Get System Clock frequency */ |
mbed_official | 155:8435094ec241 | 447 | RCC_GetClocksFreq(&RCC_Clocks); |
mbed_official | 155:8435094ec241 | 448 | |
mbed_official | 155:8435094ec241 | 449 | /* Get the source clock value: based on System Clock value */ |
mbed_official | 155:8435094ec241 | 450 | sourceclock = RCC_Clocks.SYSCLK_Frequency; |
mbed_official | 155:8435094ec241 | 451 | |
mbed_official | 155:8435094ec241 | 452 | /* Compute the Real divider depending on the MCLK output state with a floating point */ |
mbed_official | 155:8435094ec241 | 453 | if(I2S_InitStruct->I2S_MCLKOutput == I2S_MCLKOutput_Enable) |
mbed_official | 155:8435094ec241 | 454 | { |
mbed_official | 155:8435094ec241 | 455 | /* MCLK output is enabled */ |
mbed_official | 155:8435094ec241 | 456 | tmp = (uint16_t)(((((sourceclock / 256) * 10) / I2S_InitStruct->I2S_AudioFreq)) + 5); |
mbed_official | 155:8435094ec241 | 457 | } |
mbed_official | 155:8435094ec241 | 458 | else |
mbed_official | 155:8435094ec241 | 459 | { |
mbed_official | 155:8435094ec241 | 460 | /* MCLK output is disabled */ |
mbed_official | 155:8435094ec241 | 461 | tmp = (uint16_t)(((((sourceclock / (32 * packetlength)) *10 ) / I2S_InitStruct->I2S_AudioFreq)) + 5); |
mbed_official | 155:8435094ec241 | 462 | } |
mbed_official | 155:8435094ec241 | 463 | |
mbed_official | 155:8435094ec241 | 464 | /* Remove the floating point */ |
mbed_official | 155:8435094ec241 | 465 | tmp = tmp / 10; |
mbed_official | 155:8435094ec241 | 466 | |
mbed_official | 155:8435094ec241 | 467 | /* Check the parity of the divider */ |
mbed_official | 155:8435094ec241 | 468 | i2sodd = (uint16_t)(tmp & (uint16_t)0x0001); |
mbed_official | 155:8435094ec241 | 469 | |
mbed_official | 155:8435094ec241 | 470 | /* Compute the i2sdiv prescaler */ |
mbed_official | 155:8435094ec241 | 471 | i2sdiv = (uint16_t)((tmp - i2sodd) / 2); |
mbed_official | 155:8435094ec241 | 472 | |
mbed_official | 155:8435094ec241 | 473 | /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */ |
mbed_official | 155:8435094ec241 | 474 | i2sodd = (uint16_t) (i2sodd << 8); |
mbed_official | 155:8435094ec241 | 475 | } |
mbed_official | 155:8435094ec241 | 476 | |
mbed_official | 155:8435094ec241 | 477 | /* Test if the divider is 1 or 0 or greater than 0xFF */ |
mbed_official | 155:8435094ec241 | 478 | if ((i2sdiv < 2) || (i2sdiv > 0xFF)) |
mbed_official | 155:8435094ec241 | 479 | { |
mbed_official | 155:8435094ec241 | 480 | /* Set the default values */ |
mbed_official | 155:8435094ec241 | 481 | i2sdiv = 2; |
mbed_official | 155:8435094ec241 | 482 | i2sodd = 0; |
mbed_official | 155:8435094ec241 | 483 | } |
mbed_official | 155:8435094ec241 | 484 | |
mbed_official | 155:8435094ec241 | 485 | /* Write to SPIx I2SPR register the computed value */ |
mbed_official | 155:8435094ec241 | 486 | SPIx->I2SPR = (uint16_t)(i2sdiv | (uint16_t)(i2sodd | (uint16_t)I2S_InitStruct->I2S_MCLKOutput)); |
mbed_official | 155:8435094ec241 | 487 | |
mbed_official | 155:8435094ec241 | 488 | /* Configure the I2S with the SPI_InitStruct values */ |
mbed_official | 155:8435094ec241 | 489 | tmpreg |= (uint16_t)((uint16_t)(SPI_I2SCFGR_I2SMOD | I2S_InitStruct->I2S_Mode) | \ |
mbed_official | 155:8435094ec241 | 490 | (uint16_t)((uint16_t)((uint16_t)(I2S_InitStruct->I2S_Standard |I2S_InitStruct->I2S_DataFormat) |\ |
mbed_official | 155:8435094ec241 | 491 | I2S_InitStruct->I2S_CPOL))); |
mbed_official | 155:8435094ec241 | 492 | |
mbed_official | 155:8435094ec241 | 493 | /* Write to SPIx I2SCFGR */ |
mbed_official | 155:8435094ec241 | 494 | SPIx->I2SCFGR = tmpreg; |
mbed_official | 155:8435094ec241 | 495 | } |
mbed_official | 155:8435094ec241 | 496 | |
mbed_official | 155:8435094ec241 | 497 | /** |
mbed_official | 155:8435094ec241 | 498 | * @brief Enables or disables the specified SPI peripheral. |
mbed_official | 155:8435094ec241 | 499 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 500 | * @param NewState: new state of the SPIx peripheral. |
mbed_official | 155:8435094ec241 | 501 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 502 | * @retval None |
mbed_official | 155:8435094ec241 | 503 | */ |
mbed_official | 155:8435094ec241 | 504 | void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 505 | { |
mbed_official | 155:8435094ec241 | 506 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 507 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 508 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 509 | |
mbed_official | 155:8435094ec241 | 510 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 511 | { |
mbed_official | 155:8435094ec241 | 512 | /* Enable the selected SPI peripheral */ |
mbed_official | 155:8435094ec241 | 513 | SPIx->CR1 |= SPI_CR1_SPE; |
mbed_official | 155:8435094ec241 | 514 | } |
mbed_official | 155:8435094ec241 | 515 | else |
mbed_official | 155:8435094ec241 | 516 | { |
mbed_official | 155:8435094ec241 | 517 | /* Disable the selected SPI peripheral */ |
mbed_official | 155:8435094ec241 | 518 | SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_SPE); |
mbed_official | 155:8435094ec241 | 519 | } |
mbed_official | 155:8435094ec241 | 520 | } |
mbed_official | 155:8435094ec241 | 521 | |
mbed_official | 155:8435094ec241 | 522 | /** |
mbed_official | 155:8435094ec241 | 523 | * @brief Enables or disables the TI Mode. |
mbed_official | 155:8435094ec241 | 524 | * @note This function can be called only after the SPI_Init() function has |
mbed_official | 155:8435094ec241 | 525 | * been called. |
mbed_official | 155:8435094ec241 | 526 | * @note When TI mode is selected, the control bits SSM, SSI, CPOL and CPHA |
mbed_official | 155:8435094ec241 | 527 | * are not taken into consideration and are configured by hardware |
mbed_official | 155:8435094ec241 | 528 | * respectively to the TI mode requirements. |
mbed_official | 155:8435094ec241 | 529 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 530 | * @param NewState: new state of the selected SPI TI communication mode. |
mbed_official | 155:8435094ec241 | 531 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 532 | * @retval None |
mbed_official | 155:8435094ec241 | 533 | */ |
mbed_official | 155:8435094ec241 | 534 | void SPI_TIModeCmd(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 535 | { |
mbed_official | 155:8435094ec241 | 536 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 537 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 538 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 539 | |
mbed_official | 155:8435094ec241 | 540 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 541 | { |
mbed_official | 155:8435094ec241 | 542 | /* Enable the TI mode for the selected SPI peripheral */ |
mbed_official | 155:8435094ec241 | 543 | SPIx->CR2 |= SPI_CR2_FRF; |
mbed_official | 155:8435094ec241 | 544 | } |
mbed_official | 155:8435094ec241 | 545 | else |
mbed_official | 155:8435094ec241 | 546 | { |
mbed_official | 155:8435094ec241 | 547 | /* Disable the TI mode for the selected SPI peripheral */ |
mbed_official | 155:8435094ec241 | 548 | SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_FRF); |
mbed_official | 155:8435094ec241 | 549 | } |
mbed_official | 155:8435094ec241 | 550 | } |
mbed_official | 155:8435094ec241 | 551 | |
mbed_official | 155:8435094ec241 | 552 | /** |
mbed_official | 155:8435094ec241 | 553 | * @brief Enables or disables the specified SPI peripheral (in I2S mode). |
mbed_official | 155:8435094ec241 | 554 | * @param SPIx:To select the SPIx peripheral, where x can be: 2 or 3 in |
mbed_official | 155:8435094ec241 | 555 | * I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 556 | * @param NewState: new state of the SPIx peripheral. |
mbed_official | 155:8435094ec241 | 557 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 558 | * @retval None |
mbed_official | 155:8435094ec241 | 559 | */ |
mbed_official | 155:8435094ec241 | 560 | void I2S_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 561 | { |
mbed_official | 155:8435094ec241 | 562 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 563 | assert_param(IS_SPI_23_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 564 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 565 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 566 | { |
mbed_official | 155:8435094ec241 | 567 | /* Enable the selected SPI peripheral in I2S mode */ |
mbed_official | 155:8435094ec241 | 568 | SPIx->I2SCFGR |= SPI_I2SCFGR_I2SE; |
mbed_official | 155:8435094ec241 | 569 | } |
mbed_official | 155:8435094ec241 | 570 | else |
mbed_official | 155:8435094ec241 | 571 | { |
mbed_official | 155:8435094ec241 | 572 | /* Disable the selected SPI peripheral in I2S mode */ |
mbed_official | 155:8435094ec241 | 573 | SPIx->I2SCFGR &= (uint16_t)~((uint16_t)SPI_I2SCFGR_I2SE); |
mbed_official | 155:8435094ec241 | 574 | } |
mbed_official | 155:8435094ec241 | 575 | } |
mbed_official | 155:8435094ec241 | 576 | |
mbed_official | 155:8435094ec241 | 577 | /** |
mbed_official | 155:8435094ec241 | 578 | * @brief Configures the data size for the selected SPI. |
mbed_official | 155:8435094ec241 | 579 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 580 | * @param SPI_DataSize: specifies the SPI data size. |
mbed_official | 155:8435094ec241 | 581 | * For the SPIx peripheral this parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 582 | * @arg SPI_DataSize_4b: Set data size to 4 bits |
mbed_official | 155:8435094ec241 | 583 | * @arg SPI_DataSize_5b: Set data size to 5 bits |
mbed_official | 155:8435094ec241 | 584 | * @arg SPI_DataSize_6b: Set data size to 6 bits |
mbed_official | 155:8435094ec241 | 585 | * @arg SPI_DataSize_7b: Set data size to 7 bits |
mbed_official | 155:8435094ec241 | 586 | * @arg SPI_DataSize_8b: Set data size to 8 bits |
mbed_official | 155:8435094ec241 | 587 | * @arg SPI_DataSize_9b: Set data size to 9 bits |
mbed_official | 155:8435094ec241 | 588 | * @arg SPI_DataSize_10b: Set data size to 10 bits |
mbed_official | 155:8435094ec241 | 589 | * @arg SPI_DataSize_11b: Set data size to 11 bits |
mbed_official | 155:8435094ec241 | 590 | * @arg SPI_DataSize_12b: Set data size to 12 bits |
mbed_official | 155:8435094ec241 | 591 | * @arg SPI_DataSize_13b: Set data size to 13 bits |
mbed_official | 155:8435094ec241 | 592 | * @arg SPI_DataSize_14b: Set data size to 14 bits |
mbed_official | 155:8435094ec241 | 593 | * @arg SPI_DataSize_15b: Set data size to 15 bits |
mbed_official | 155:8435094ec241 | 594 | * @arg SPI_DataSize_16b: Set data size to 16 bits |
mbed_official | 155:8435094ec241 | 595 | * @retval None |
mbed_official | 155:8435094ec241 | 596 | */ |
mbed_official | 155:8435094ec241 | 597 | void SPI_DataSizeConfig(SPI_TypeDef* SPIx, uint16_t SPI_DataSize) |
mbed_official | 155:8435094ec241 | 598 | { |
mbed_official | 155:8435094ec241 | 599 | uint16_t tmpreg = 0; |
mbed_official | 155:8435094ec241 | 600 | |
mbed_official | 155:8435094ec241 | 601 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 602 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 603 | assert_param(IS_SPI_DATA_SIZE(SPI_DataSize)); |
mbed_official | 155:8435094ec241 | 604 | /* Read the CR2 register */ |
mbed_official | 155:8435094ec241 | 605 | tmpreg = SPIx->CR2; |
mbed_official | 155:8435094ec241 | 606 | /* Clear DS[3:0] bits */ |
mbed_official | 155:8435094ec241 | 607 | tmpreg &= (uint16_t)~SPI_CR2_DS; |
mbed_official | 155:8435094ec241 | 608 | /* Set new DS[3:0] bits value */ |
mbed_official | 155:8435094ec241 | 609 | tmpreg |= SPI_DataSize; |
mbed_official | 155:8435094ec241 | 610 | SPIx->CR2 = tmpreg; |
mbed_official | 155:8435094ec241 | 611 | } |
mbed_official | 155:8435094ec241 | 612 | |
mbed_official | 155:8435094ec241 | 613 | /** |
mbed_official | 155:8435094ec241 | 614 | * @brief Configures the FIFO reception threshold for the selected SPI. |
mbed_official | 155:8435094ec241 | 615 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 616 | * @param SPI_RxFIFOThreshold: specifies the FIFO reception threshold. |
mbed_official | 155:8435094ec241 | 617 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 618 | * @arg SPI_RxFIFOThreshold_HF: RXNE event is generated if the FIFO |
mbed_official | 155:8435094ec241 | 619 | * level is greater or equal to 1/2. |
mbed_official | 155:8435094ec241 | 620 | * @arg SPI_RxFIFOThreshold_QF: RXNE event is generated if the FIFO |
mbed_official | 155:8435094ec241 | 621 | * level is greater or equal to 1/4. |
mbed_official | 155:8435094ec241 | 622 | * @retval None |
mbed_official | 155:8435094ec241 | 623 | */ |
mbed_official | 155:8435094ec241 | 624 | void SPI_RxFIFOThresholdConfig(SPI_TypeDef* SPIx, uint16_t SPI_RxFIFOThreshold) |
mbed_official | 155:8435094ec241 | 625 | { |
mbed_official | 155:8435094ec241 | 626 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 627 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 628 | assert_param(IS_SPI_RX_FIFO_THRESHOLD(SPI_RxFIFOThreshold)); |
mbed_official | 155:8435094ec241 | 629 | |
mbed_official | 155:8435094ec241 | 630 | /* Clear FRXTH bit */ |
mbed_official | 155:8435094ec241 | 631 | SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_FRXTH); |
mbed_official | 155:8435094ec241 | 632 | |
mbed_official | 155:8435094ec241 | 633 | /* Set new FRXTH bit value */ |
mbed_official | 155:8435094ec241 | 634 | SPIx->CR2 |= SPI_RxFIFOThreshold; |
mbed_official | 155:8435094ec241 | 635 | } |
mbed_official | 155:8435094ec241 | 636 | |
mbed_official | 155:8435094ec241 | 637 | /** |
mbed_official | 155:8435094ec241 | 638 | * @brief Selects the data transfer direction in bidirectional mode for the specified SPI. |
mbed_official | 155:8435094ec241 | 639 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 640 | * @param SPI_Direction: specifies the data transfer direction in bidirectional mode. |
mbed_official | 155:8435094ec241 | 641 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 642 | * @arg SPI_Direction_Tx: Selects Tx transmission direction |
mbed_official | 155:8435094ec241 | 643 | * @arg SPI_Direction_Rx: Selects Rx receive direction |
mbed_official | 155:8435094ec241 | 644 | * @retval None |
mbed_official | 155:8435094ec241 | 645 | */ |
mbed_official | 155:8435094ec241 | 646 | void SPI_BiDirectionalLineConfig(SPI_TypeDef* SPIx, uint16_t SPI_Direction) |
mbed_official | 155:8435094ec241 | 647 | { |
mbed_official | 155:8435094ec241 | 648 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 649 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 650 | assert_param(IS_SPI_DIRECTION(SPI_Direction)); |
mbed_official | 155:8435094ec241 | 651 | if (SPI_Direction == SPI_Direction_Tx) |
mbed_official | 155:8435094ec241 | 652 | { |
mbed_official | 155:8435094ec241 | 653 | /* Set the Tx only mode */ |
mbed_official | 155:8435094ec241 | 654 | SPIx->CR1 |= SPI_Direction_Tx; |
mbed_official | 155:8435094ec241 | 655 | } |
mbed_official | 155:8435094ec241 | 656 | else |
mbed_official | 155:8435094ec241 | 657 | { |
mbed_official | 155:8435094ec241 | 658 | /* Set the Rx only mode */ |
mbed_official | 155:8435094ec241 | 659 | SPIx->CR1 &= SPI_Direction_Rx; |
mbed_official | 155:8435094ec241 | 660 | } |
mbed_official | 155:8435094ec241 | 661 | } |
mbed_official | 155:8435094ec241 | 662 | |
mbed_official | 155:8435094ec241 | 663 | /** |
mbed_official | 155:8435094ec241 | 664 | * @brief Configures internally by software the NSS pin for the selected SPI. |
mbed_official | 155:8435094ec241 | 665 | * @note This function can be called only after the SPI_Init() function has |
mbed_official | 155:8435094ec241 | 666 | * been called. |
mbed_official | 155:8435094ec241 | 667 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 668 | * @param SPI_NSSInternalSoft: specifies the SPI NSS internal state. |
mbed_official | 155:8435094ec241 | 669 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 670 | * @arg SPI_NSSInternalSoft_Set: Set NSS pin internally |
mbed_official | 155:8435094ec241 | 671 | * @arg SPI_NSSInternalSoft_Reset: Reset NSS pin internally |
mbed_official | 155:8435094ec241 | 672 | * @retval None |
mbed_official | 155:8435094ec241 | 673 | */ |
mbed_official | 155:8435094ec241 | 674 | void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, uint16_t SPI_NSSInternalSoft) |
mbed_official | 155:8435094ec241 | 675 | { |
mbed_official | 155:8435094ec241 | 676 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 677 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 678 | assert_param(IS_SPI_NSS_INTERNAL(SPI_NSSInternalSoft)); |
mbed_official | 155:8435094ec241 | 679 | |
mbed_official | 155:8435094ec241 | 680 | if (SPI_NSSInternalSoft != SPI_NSSInternalSoft_Reset) |
mbed_official | 155:8435094ec241 | 681 | { |
mbed_official | 155:8435094ec241 | 682 | /* Set NSS pin internally by software */ |
mbed_official | 155:8435094ec241 | 683 | SPIx->CR1 |= SPI_NSSInternalSoft_Set; |
mbed_official | 155:8435094ec241 | 684 | } |
mbed_official | 155:8435094ec241 | 685 | else |
mbed_official | 155:8435094ec241 | 686 | { |
mbed_official | 155:8435094ec241 | 687 | /* Reset NSS pin internally by software */ |
mbed_official | 155:8435094ec241 | 688 | SPIx->CR1 &= SPI_NSSInternalSoft_Reset; |
mbed_official | 155:8435094ec241 | 689 | } |
mbed_official | 155:8435094ec241 | 690 | } |
mbed_official | 155:8435094ec241 | 691 | |
mbed_official | 155:8435094ec241 | 692 | /** |
mbed_official | 155:8435094ec241 | 693 | * @brief Configures the full duplex mode for the I2Sx peripheral using its |
mbed_official | 155:8435094ec241 | 694 | * extension I2Sxext according to the specified parameters in the |
mbed_official | 155:8435094ec241 | 695 | * I2S_InitStruct. |
mbed_official | 155:8435094ec241 | 696 | * @param I2Sxext: where x can be 2 or 3 to select the I2S peripheral extension block. |
mbed_official | 155:8435094ec241 | 697 | * @param I2S_InitStruct: pointer to an I2S_InitTypeDef structure that |
mbed_official | 155:8435094ec241 | 698 | * contains the configuration information for the specified I2S peripheral |
mbed_official | 155:8435094ec241 | 699 | * extension. |
mbed_official | 155:8435094ec241 | 700 | * |
mbed_official | 155:8435094ec241 | 701 | * @note The structure pointed by I2S_InitStruct parameter should be the same |
mbed_official | 155:8435094ec241 | 702 | * used for the master I2S peripheral. In this case, if the master is |
mbed_official | 155:8435094ec241 | 703 | * configured as transmitter, the slave will be receiver and vice versa. |
mbed_official | 155:8435094ec241 | 704 | * Or you can force a different mode by modifying the field I2S_Mode to the |
mbed_official | 155:8435094ec241 | 705 | * value I2S_SlaveRx or I2S_SlaveTx indepedently of the master configuration. |
mbed_official | 155:8435094ec241 | 706 | * |
mbed_official | 155:8435094ec241 | 707 | * @note The I2S full duplex extension can be configured in slave mode only. |
mbed_official | 155:8435094ec241 | 708 | * |
mbed_official | 155:8435094ec241 | 709 | * @retval None |
mbed_official | 155:8435094ec241 | 710 | */ |
mbed_official | 155:8435094ec241 | 711 | void I2S_FullDuplexConfig(SPI_TypeDef* I2Sxext, I2S_InitTypeDef* I2S_InitStruct) |
mbed_official | 155:8435094ec241 | 712 | { |
mbed_official | 155:8435094ec241 | 713 | uint16_t tmpreg = 0, tmp = 0; |
mbed_official | 155:8435094ec241 | 714 | |
mbed_official | 155:8435094ec241 | 715 | /* Check the I2S parameters */ |
mbed_official | 155:8435094ec241 | 716 | assert_param(IS_I2S_EXT_PERIPH(I2Sxext)); |
mbed_official | 155:8435094ec241 | 717 | assert_param(IS_I2S_MODE(I2S_InitStruct->I2S_Mode)); |
mbed_official | 155:8435094ec241 | 718 | assert_param(IS_I2S_STANDARD(I2S_InitStruct->I2S_Standard)); |
mbed_official | 155:8435094ec241 | 719 | assert_param(IS_I2S_DATA_FORMAT(I2S_InitStruct->I2S_DataFormat)); |
mbed_official | 155:8435094ec241 | 720 | assert_param(IS_I2S_CPOL(I2S_InitStruct->I2S_CPOL)); |
mbed_official | 155:8435094ec241 | 721 | |
mbed_official | 155:8435094ec241 | 722 | /*----------------------- SPIx I2SCFGR & I2SPR Configuration -----------------*/ |
mbed_official | 155:8435094ec241 | 723 | /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */ |
mbed_official | 155:8435094ec241 | 724 | I2Sxext->I2SCFGR &= I2SCFGR_CLEAR_MASK; |
mbed_official | 155:8435094ec241 | 725 | I2Sxext->I2SPR = 0x0002; |
mbed_official | 155:8435094ec241 | 726 | |
mbed_official | 155:8435094ec241 | 727 | /* Get the I2SCFGR register value */ |
mbed_official | 155:8435094ec241 | 728 | tmpreg = I2Sxext->I2SCFGR; |
mbed_official | 155:8435094ec241 | 729 | |
mbed_official | 155:8435094ec241 | 730 | /* Get the mode to be configured for the extended I2S */ |
mbed_official | 155:8435094ec241 | 731 | if ((I2S_InitStruct->I2S_Mode == I2S_Mode_MasterTx) || (I2S_InitStruct->I2S_Mode == I2S_Mode_SlaveTx)) |
mbed_official | 155:8435094ec241 | 732 | { |
mbed_official | 155:8435094ec241 | 733 | tmp = I2S_Mode_SlaveRx; |
mbed_official | 155:8435094ec241 | 734 | } |
mbed_official | 155:8435094ec241 | 735 | else |
mbed_official | 155:8435094ec241 | 736 | { |
mbed_official | 155:8435094ec241 | 737 | if ((I2S_InitStruct->I2S_Mode == I2S_Mode_MasterRx) || (I2S_InitStruct->I2S_Mode == I2S_Mode_SlaveRx)) |
mbed_official | 155:8435094ec241 | 738 | { |
mbed_official | 155:8435094ec241 | 739 | tmp = I2S_Mode_SlaveTx; |
mbed_official | 155:8435094ec241 | 740 | } |
mbed_official | 155:8435094ec241 | 741 | } |
mbed_official | 155:8435094ec241 | 742 | |
mbed_official | 155:8435094ec241 | 743 | |
mbed_official | 155:8435094ec241 | 744 | /* Configure the I2S with the SPI_InitStruct values */ |
mbed_official | 155:8435094ec241 | 745 | tmpreg |= (uint16_t)((uint16_t)SPI_I2SCFGR_I2SMOD | (uint16_t)(tmp | \ |
mbed_official | 155:8435094ec241 | 746 | (uint16_t)(I2S_InitStruct->I2S_Standard | (uint16_t)(I2S_InitStruct->I2S_DataFormat | \ |
mbed_official | 155:8435094ec241 | 747 | (uint16_t)I2S_InitStruct->I2S_CPOL)))); |
mbed_official | 155:8435094ec241 | 748 | |
mbed_official | 155:8435094ec241 | 749 | /* Write to SPIx I2SCFGR */ |
mbed_official | 155:8435094ec241 | 750 | I2Sxext->I2SCFGR = tmpreg; |
mbed_official | 155:8435094ec241 | 751 | } |
mbed_official | 155:8435094ec241 | 752 | |
mbed_official | 155:8435094ec241 | 753 | /** |
mbed_official | 155:8435094ec241 | 754 | * @brief Enables or disables the SS output for the selected SPI. |
mbed_official | 155:8435094ec241 | 755 | * @note This function can be called only after the SPI_Init() function has |
mbed_official | 155:8435094ec241 | 756 | * been called and the NSS hardware management mode is selected. |
mbed_official | 155:8435094ec241 | 757 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 758 | * @param NewState: new state of the SPIx SS output. |
mbed_official | 155:8435094ec241 | 759 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 760 | * @retval None |
mbed_official | 155:8435094ec241 | 761 | */ |
mbed_official | 155:8435094ec241 | 762 | void SPI_SSOutputCmd(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 763 | { |
mbed_official | 155:8435094ec241 | 764 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 765 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 766 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 767 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 768 | { |
mbed_official | 155:8435094ec241 | 769 | /* Enable the selected SPI SS output */ |
mbed_official | 155:8435094ec241 | 770 | SPIx->CR2 |= (uint16_t)SPI_CR2_SSOE; |
mbed_official | 155:8435094ec241 | 771 | } |
mbed_official | 155:8435094ec241 | 772 | else |
mbed_official | 155:8435094ec241 | 773 | { |
mbed_official | 155:8435094ec241 | 774 | /* Disable the selected SPI SS output */ |
mbed_official | 155:8435094ec241 | 775 | SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_SSOE); |
mbed_official | 155:8435094ec241 | 776 | } |
mbed_official | 155:8435094ec241 | 777 | } |
mbed_official | 155:8435094ec241 | 778 | |
mbed_official | 155:8435094ec241 | 779 | /** |
mbed_official | 155:8435094ec241 | 780 | * @brief Enables or disables the NSS pulse management mode. |
mbed_official | 155:8435094ec241 | 781 | * @note This function can be called only after the SPI_Init() function has |
mbed_official | 155:8435094ec241 | 782 | * been called. |
mbed_official | 155:8435094ec241 | 783 | * @note When TI mode is selected, the control bits NSSP is not taken into |
mbed_official | 155:8435094ec241 | 784 | * consideration and are configured by hardware respectively to the |
mbed_official | 155:8435094ec241 | 785 | * TI mode requirements. |
mbed_official | 155:8435094ec241 | 786 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 787 | * @param NewState: new state of the NSS pulse management mode. |
mbed_official | 155:8435094ec241 | 788 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 789 | * @retval None |
mbed_official | 155:8435094ec241 | 790 | */ |
mbed_official | 155:8435094ec241 | 791 | void SPI_NSSPulseModeCmd(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 792 | { |
mbed_official | 155:8435094ec241 | 793 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 794 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 795 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 796 | |
mbed_official | 155:8435094ec241 | 797 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 798 | { |
mbed_official | 155:8435094ec241 | 799 | /* Enable the NSS pulse management mode */ |
mbed_official | 155:8435094ec241 | 800 | SPIx->CR2 |= SPI_CR2_NSSP; |
mbed_official | 155:8435094ec241 | 801 | } |
mbed_official | 155:8435094ec241 | 802 | else |
mbed_official | 155:8435094ec241 | 803 | { |
mbed_official | 155:8435094ec241 | 804 | /* Disable the NSS pulse management mode */ |
mbed_official | 155:8435094ec241 | 805 | SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_NSSP); |
mbed_official | 155:8435094ec241 | 806 | } |
mbed_official | 155:8435094ec241 | 807 | } |
mbed_official | 155:8435094ec241 | 808 | |
mbed_official | 155:8435094ec241 | 809 | /** |
mbed_official | 155:8435094ec241 | 810 | * @} |
mbed_official | 155:8435094ec241 | 811 | */ |
mbed_official | 155:8435094ec241 | 812 | |
mbed_official | 155:8435094ec241 | 813 | /** @defgroup SPI_Group2 Data transfers functions |
mbed_official | 155:8435094ec241 | 814 | * @brief Data transfers functions |
mbed_official | 155:8435094ec241 | 815 | * |
mbed_official | 155:8435094ec241 | 816 | @verbatim |
mbed_official | 155:8435094ec241 | 817 | =============================================================================== |
mbed_official | 155:8435094ec241 | 818 | ##### Data transfers functions ##### |
mbed_official | 155:8435094ec241 | 819 | =============================================================================== |
mbed_official | 155:8435094ec241 | 820 | [..] This section provides a set of functions allowing to manage the SPI or I2S |
mbed_official | 155:8435094ec241 | 821 | data transfers. |
mbed_official | 155:8435094ec241 | 822 | [..] In reception, data are received and then stored into an internal Rx buffer while |
mbed_official | 155:8435094ec241 | 823 | In transmission, data are first stored into an internal Tx buffer before being |
mbed_official | 155:8435094ec241 | 824 | transmitted. |
mbed_official | 155:8435094ec241 | 825 | [..] The read access of the SPI_DR register can be done using the SPI_I2S_ReceiveData() |
mbed_official | 155:8435094ec241 | 826 | function and returns the Rx buffered value. Whereas a write access to the SPI_DR |
mbed_official | 155:8435094ec241 | 827 | can be done using SPI_I2S_SendData() function and stores the written data into |
mbed_official | 155:8435094ec241 | 828 | Tx buffer. |
mbed_official | 155:8435094ec241 | 829 | |
mbed_official | 155:8435094ec241 | 830 | @endverbatim |
mbed_official | 155:8435094ec241 | 831 | * @{ |
mbed_official | 155:8435094ec241 | 832 | */ |
mbed_official | 155:8435094ec241 | 833 | |
mbed_official | 155:8435094ec241 | 834 | /** |
mbed_official | 155:8435094ec241 | 835 | * @brief Transmits a Data through the SPIx peripheral. |
mbed_official | 155:8435094ec241 | 836 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 837 | * @param Data: Data to be transmitted. |
mbed_official | 155:8435094ec241 | 838 | * @retval None |
mbed_official | 155:8435094ec241 | 839 | */ |
mbed_official | 155:8435094ec241 | 840 | void SPI_SendData8(SPI_TypeDef* SPIx, uint8_t Data) |
mbed_official | 155:8435094ec241 | 841 | { |
mbed_official | 155:8435094ec241 | 842 | uint32_t spixbase = 0x00; |
mbed_official | 155:8435094ec241 | 843 | |
mbed_official | 155:8435094ec241 | 844 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 845 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 846 | |
mbed_official | 155:8435094ec241 | 847 | spixbase = (uint32_t)SPIx; |
mbed_official | 155:8435094ec241 | 848 | spixbase += 0x0C; |
mbed_official | 155:8435094ec241 | 849 | |
mbed_official | 155:8435094ec241 | 850 | *(__IO uint8_t *) spixbase = Data; |
mbed_official | 155:8435094ec241 | 851 | } |
mbed_official | 155:8435094ec241 | 852 | |
mbed_official | 155:8435094ec241 | 853 | /** |
mbed_official | 155:8435094ec241 | 854 | * @brief Transmits a Data through the SPIx/I2Sx peripheral. |
mbed_official | 155:8435094ec241 | 855 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 856 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 857 | * @param Data: Data to be transmitted. |
mbed_official | 155:8435094ec241 | 858 | * @retval None |
mbed_official | 155:8435094ec241 | 859 | */ |
mbed_official | 155:8435094ec241 | 860 | void SPI_I2S_SendData16(SPI_TypeDef* SPIx, uint16_t Data) |
mbed_official | 155:8435094ec241 | 861 | { |
mbed_official | 155:8435094ec241 | 862 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 863 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 864 | |
mbed_official | 155:8435094ec241 | 865 | SPIx->DR = (uint16_t)Data; |
mbed_official | 155:8435094ec241 | 866 | } |
mbed_official | 155:8435094ec241 | 867 | |
mbed_official | 155:8435094ec241 | 868 | /** |
mbed_official | 155:8435094ec241 | 869 | * @brief Returns the most recent received data by the SPIx peripheral. |
mbed_official | 155:8435094ec241 | 870 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 871 | * @retval The value of the received data. |
mbed_official | 155:8435094ec241 | 872 | */ |
mbed_official | 155:8435094ec241 | 873 | uint8_t SPI_ReceiveData8(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 874 | { |
mbed_official | 155:8435094ec241 | 875 | uint32_t spixbase = 0x00; |
mbed_official | 155:8435094ec241 | 876 | |
mbed_official | 155:8435094ec241 | 877 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 878 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 879 | |
mbed_official | 155:8435094ec241 | 880 | spixbase = (uint32_t)SPIx; |
mbed_official | 155:8435094ec241 | 881 | spixbase += 0x0C; |
mbed_official | 155:8435094ec241 | 882 | |
mbed_official | 155:8435094ec241 | 883 | return *(__IO uint8_t *) spixbase; |
mbed_official | 155:8435094ec241 | 884 | } |
mbed_official | 155:8435094ec241 | 885 | |
mbed_official | 155:8435094ec241 | 886 | /** |
mbed_official | 155:8435094ec241 | 887 | * @brief Returns the most recent received data by the SPIx peripheral. |
mbed_official | 155:8435094ec241 | 888 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 889 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 890 | * @retval The value of the received data. |
mbed_official | 155:8435094ec241 | 891 | */ |
mbed_official | 155:8435094ec241 | 892 | uint16_t SPI_I2S_ReceiveData16(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 893 | { |
mbed_official | 155:8435094ec241 | 894 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 895 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 896 | |
mbed_official | 155:8435094ec241 | 897 | return SPIx->DR; |
mbed_official | 155:8435094ec241 | 898 | } |
mbed_official | 155:8435094ec241 | 899 | /** |
mbed_official | 155:8435094ec241 | 900 | * @} |
mbed_official | 155:8435094ec241 | 901 | */ |
mbed_official | 155:8435094ec241 | 902 | |
mbed_official | 155:8435094ec241 | 903 | /** @defgroup SPI_Group3 Hardware CRC Calculation functions |
mbed_official | 155:8435094ec241 | 904 | * @brief Hardware CRC Calculation functions |
mbed_official | 155:8435094ec241 | 905 | * |
mbed_official | 155:8435094ec241 | 906 | @verbatim |
mbed_official | 155:8435094ec241 | 907 | =============================================================================== |
mbed_official | 155:8435094ec241 | 908 | ##### Hardware CRC Calculation functions ##### |
mbed_official | 155:8435094ec241 | 909 | =============================================================================== |
mbed_official | 155:8435094ec241 | 910 | [..] This section provides a set of functions allowing to manage the SPI CRC hardware |
mbed_official | 155:8435094ec241 | 911 | calculation. |
mbed_official | 155:8435094ec241 | 912 | [..] SPI communication using CRC is possible through the following procedure: |
mbed_official | 155:8435094ec241 | 913 | (#) Program the Data direction, Polarity, Phase, First Data, Baud Rate Prescaler, |
mbed_official | 155:8435094ec241 | 914 | Slave Management, Peripheral Mode and CRC Polynomial values using the SPI_Init() |
mbed_official | 155:8435094ec241 | 915 | function. |
mbed_official | 155:8435094ec241 | 916 | (#) Enable the CRC calculation using the SPI_CalculateCRC() function. |
mbed_official | 155:8435094ec241 | 917 | (#) Enable the SPI using the SPI_Cmd() function |
mbed_official | 155:8435094ec241 | 918 | (#) Before writing the last data to the TX buffer, set the CRCNext bit using the |
mbed_official | 155:8435094ec241 | 919 | SPI_TransmitCRC() function to indicate that after transmission of the last |
mbed_official | 155:8435094ec241 | 920 | data, the CRC should be transmitted. |
mbed_official | 155:8435094ec241 | 921 | (#) After transmitting the last data, the SPI transmits the CRC. The SPI_CR1_CRCNEXT |
mbed_official | 155:8435094ec241 | 922 | bit is reset. The CRC is also received and compared against the SPI_RXCRCR |
mbed_official | 155:8435094ec241 | 923 | value. |
mbed_official | 155:8435094ec241 | 924 | If the value does not match, the SPI_FLAG_CRCERR flag is set and an interrupt |
mbed_official | 155:8435094ec241 | 925 | can be generated when the SPI_I2S_IT_ERR interrupt is enabled. |
mbed_official | 155:8435094ec241 | 926 | [..] |
mbed_official | 155:8435094ec241 | 927 | (@) |
mbed_official | 155:8435094ec241 | 928 | (+@) It is advised to don't read the calculate CRC values during the communication. |
mbed_official | 155:8435094ec241 | 929 | (+@) When the SPI is in slave mode, be careful to enable CRC calculation only |
mbed_official | 155:8435094ec241 | 930 | when the clock is stable, that is, when the clock is in the steady state. |
mbed_official | 155:8435094ec241 | 931 | If not, a wrong CRC calculation may be done. In fact, the CRC is sensitive |
mbed_official | 155:8435094ec241 | 932 | to the SCK slave input clock as soon as CRCEN is set, and this, whatever |
mbed_official | 155:8435094ec241 | 933 | the value of the SPE bit. |
mbed_official | 155:8435094ec241 | 934 | (+@) With high bitrate frequencies, be careful when transmitting the CRC. |
mbed_official | 155:8435094ec241 | 935 | As the number of used CPU cycles has to be as low as possible in the CRC |
mbed_official | 155:8435094ec241 | 936 | transfer phase, it is forbidden to call software functions in the CRC |
mbed_official | 155:8435094ec241 | 937 | transmission sequence to avoid errors in the last data and CRC reception. |
mbed_official | 155:8435094ec241 | 938 | In fact, CRCNEXT bit has to be written before the end of the transmission/reception |
mbed_official | 155:8435094ec241 | 939 | of the last data. |
mbed_official | 155:8435094ec241 | 940 | (+@) For high bit rate frequencies, it is advised to use the DMA mode to avoid the |
mbed_official | 155:8435094ec241 | 941 | degradation of the SPI speed performance due to CPU accesses impacting the |
mbed_official | 155:8435094ec241 | 942 | SPI bandwidth. |
mbed_official | 155:8435094ec241 | 943 | (+@) When the STM32F30x are configured as slaves and the NSS hardware mode is |
mbed_official | 155:8435094ec241 | 944 | used, the NSS pin needs to be kept low between the data phase and the CRC |
mbed_official | 155:8435094ec241 | 945 | phase. |
mbed_official | 155:8435094ec241 | 946 | (+@) When the SPI is configured in slave mode with the CRC feature enabled, CRC |
mbed_official | 155:8435094ec241 | 947 | calculation takes place even if a high level is applied on the NSS pin. |
mbed_official | 155:8435094ec241 | 948 | This may happen for example in case of a multislave environment where the |
mbed_official | 155:8435094ec241 | 949 | communication master addresses slaves alternately. |
mbed_official | 155:8435094ec241 | 950 | (+@) Between a slave deselection (high level on NSS) and a new slave selection |
mbed_official | 155:8435094ec241 | 951 | (low level on NSS), the CRC value should be cleared on both master and slave |
mbed_official | 155:8435094ec241 | 952 | sides in order to resynchronize the master and slave for their respective |
mbed_official | 155:8435094ec241 | 953 | CRC calculation. |
mbed_official | 155:8435094ec241 | 954 | [..] |
mbed_official | 155:8435094ec241 | 955 | (@) To clear the CRC, follow the procedure below: |
mbed_official | 155:8435094ec241 | 956 | (#@) Disable SPI using the SPI_Cmd() function. |
mbed_official | 155:8435094ec241 | 957 | (#@) Disable the CRC calculation using the SPI_CalculateCRC() function. |
mbed_official | 155:8435094ec241 | 958 | (#@) Enable the CRC calculation using the SPI_CalculateCRC() function. |
mbed_official | 155:8435094ec241 | 959 | (#@) Enable SPI using the SPI_Cmd() function. |
mbed_official | 155:8435094ec241 | 960 | |
mbed_official | 155:8435094ec241 | 961 | @endverbatim |
mbed_official | 155:8435094ec241 | 962 | * @{ |
mbed_official | 155:8435094ec241 | 963 | */ |
mbed_official | 155:8435094ec241 | 964 | |
mbed_official | 155:8435094ec241 | 965 | /** |
mbed_official | 155:8435094ec241 | 966 | * @brief Configures the CRC calculation length for the selected SPI. |
mbed_official | 155:8435094ec241 | 967 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 968 | * @param SPI_CRCLength: specifies the SPI CRC calculation length. |
mbed_official | 155:8435094ec241 | 969 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 970 | * @arg SPI_CRCLength_8b: Set CRC Calculation to 8 bits |
mbed_official | 155:8435094ec241 | 971 | * @arg SPI_CRCLength_16b: Set CRC Calculation to 16 bits |
mbed_official | 155:8435094ec241 | 972 | * @retval None |
mbed_official | 155:8435094ec241 | 973 | */ |
mbed_official | 155:8435094ec241 | 974 | void SPI_CRCLengthConfig(SPI_TypeDef* SPIx, uint16_t SPI_CRCLength) |
mbed_official | 155:8435094ec241 | 975 | { |
mbed_official | 155:8435094ec241 | 976 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 977 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 978 | assert_param(IS_SPI_CRC_LENGTH(SPI_CRCLength)); |
mbed_official | 155:8435094ec241 | 979 | |
mbed_official | 155:8435094ec241 | 980 | /* Clear CRCL bit */ |
mbed_official | 155:8435094ec241 | 981 | SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_CRCL); |
mbed_official | 155:8435094ec241 | 982 | |
mbed_official | 155:8435094ec241 | 983 | /* Set new CRCL bit value */ |
mbed_official | 155:8435094ec241 | 984 | SPIx->CR1 |= SPI_CRCLength; |
mbed_official | 155:8435094ec241 | 985 | } |
mbed_official | 155:8435094ec241 | 986 | |
mbed_official | 155:8435094ec241 | 987 | /** |
mbed_official | 155:8435094ec241 | 988 | * @brief Enables or disables the CRC value calculation of the transferred bytes. |
mbed_official | 155:8435094ec241 | 989 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 990 | * @param NewState: new state of the SPIx CRC value calculation. |
mbed_official | 155:8435094ec241 | 991 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 992 | * @retval None |
mbed_official | 155:8435094ec241 | 993 | */ |
mbed_official | 155:8435094ec241 | 994 | void SPI_CalculateCRC(SPI_TypeDef* SPIx, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 995 | { |
mbed_official | 155:8435094ec241 | 996 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 997 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 998 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 999 | |
mbed_official | 155:8435094ec241 | 1000 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 1001 | { |
mbed_official | 155:8435094ec241 | 1002 | /* Enable the selected SPI CRC calculation */ |
mbed_official | 155:8435094ec241 | 1003 | SPIx->CR1 |= SPI_CR1_CRCEN; |
mbed_official | 155:8435094ec241 | 1004 | } |
mbed_official | 155:8435094ec241 | 1005 | else |
mbed_official | 155:8435094ec241 | 1006 | { |
mbed_official | 155:8435094ec241 | 1007 | /* Disable the selected SPI CRC calculation */ |
mbed_official | 155:8435094ec241 | 1008 | SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_CRCEN); |
mbed_official | 155:8435094ec241 | 1009 | } |
mbed_official | 155:8435094ec241 | 1010 | } |
mbed_official | 155:8435094ec241 | 1011 | |
mbed_official | 155:8435094ec241 | 1012 | /** |
mbed_official | 155:8435094ec241 | 1013 | * @brief Transmits the SPIx CRC value. |
mbed_official | 155:8435094ec241 | 1014 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1015 | * @retval None |
mbed_official | 155:8435094ec241 | 1016 | */ |
mbed_official | 155:8435094ec241 | 1017 | void SPI_TransmitCRC(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 1018 | { |
mbed_official | 155:8435094ec241 | 1019 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1020 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 1021 | |
mbed_official | 155:8435094ec241 | 1022 | /* Enable the selected SPI CRC transmission */ |
mbed_official | 155:8435094ec241 | 1023 | SPIx->CR1 |= SPI_CR1_CRCNEXT; |
mbed_official | 155:8435094ec241 | 1024 | } |
mbed_official | 155:8435094ec241 | 1025 | |
mbed_official | 155:8435094ec241 | 1026 | /** |
mbed_official | 155:8435094ec241 | 1027 | * @brief Returns the transmit or the receive CRC register value for the specified SPI. |
mbed_official | 155:8435094ec241 | 1028 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1029 | * @param SPI_CRC: specifies the CRC register to be read. |
mbed_official | 155:8435094ec241 | 1030 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 1031 | * @arg SPI_CRC_Tx: Selects Tx CRC register |
mbed_official | 155:8435094ec241 | 1032 | * @arg SPI_CRC_Rx: Selects Rx CRC register |
mbed_official | 155:8435094ec241 | 1033 | * @retval The selected CRC register value.. |
mbed_official | 155:8435094ec241 | 1034 | */ |
mbed_official | 155:8435094ec241 | 1035 | uint16_t SPI_GetCRC(SPI_TypeDef* SPIx, uint8_t SPI_CRC) |
mbed_official | 155:8435094ec241 | 1036 | { |
mbed_official | 155:8435094ec241 | 1037 | uint16_t crcreg = 0; |
mbed_official | 155:8435094ec241 | 1038 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1039 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 1040 | assert_param(IS_SPI_CRC(SPI_CRC)); |
mbed_official | 155:8435094ec241 | 1041 | |
mbed_official | 155:8435094ec241 | 1042 | if (SPI_CRC != SPI_CRC_Rx) |
mbed_official | 155:8435094ec241 | 1043 | { |
mbed_official | 155:8435094ec241 | 1044 | /* Get the Tx CRC register */ |
mbed_official | 155:8435094ec241 | 1045 | crcreg = SPIx->TXCRCR; |
mbed_official | 155:8435094ec241 | 1046 | } |
mbed_official | 155:8435094ec241 | 1047 | else |
mbed_official | 155:8435094ec241 | 1048 | { |
mbed_official | 155:8435094ec241 | 1049 | /* Get the Rx CRC register */ |
mbed_official | 155:8435094ec241 | 1050 | crcreg = SPIx->RXCRCR; |
mbed_official | 155:8435094ec241 | 1051 | } |
mbed_official | 155:8435094ec241 | 1052 | /* Return the selected CRC register */ |
mbed_official | 155:8435094ec241 | 1053 | return crcreg; |
mbed_official | 155:8435094ec241 | 1054 | } |
mbed_official | 155:8435094ec241 | 1055 | |
mbed_official | 155:8435094ec241 | 1056 | /** |
mbed_official | 155:8435094ec241 | 1057 | * @brief Returns the CRC Polynomial register value for the specified SPI. |
mbed_official | 155:8435094ec241 | 1058 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1059 | * @retval The CRC Polynomial register value. |
mbed_official | 155:8435094ec241 | 1060 | */ |
mbed_official | 155:8435094ec241 | 1061 | uint16_t SPI_GetCRCPolynomial(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 1062 | { |
mbed_official | 155:8435094ec241 | 1063 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1064 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 1065 | |
mbed_official | 155:8435094ec241 | 1066 | /* Return the CRC polynomial register */ |
mbed_official | 155:8435094ec241 | 1067 | return SPIx->CRCPR; |
mbed_official | 155:8435094ec241 | 1068 | } |
mbed_official | 155:8435094ec241 | 1069 | |
mbed_official | 155:8435094ec241 | 1070 | /** |
mbed_official | 155:8435094ec241 | 1071 | * @} |
mbed_official | 155:8435094ec241 | 1072 | */ |
mbed_official | 155:8435094ec241 | 1073 | |
mbed_official | 155:8435094ec241 | 1074 | /** @defgroup SPI_Group4 DMA transfers management functions |
mbed_official | 155:8435094ec241 | 1075 | * @brief DMA transfers management functions |
mbed_official | 155:8435094ec241 | 1076 | * |
mbed_official | 155:8435094ec241 | 1077 | @verbatim |
mbed_official | 155:8435094ec241 | 1078 | =============================================================================== |
mbed_official | 155:8435094ec241 | 1079 | ##### DMA transfers management functions ##### |
mbed_official | 155:8435094ec241 | 1080 | =============================================================================== |
mbed_official | 155:8435094ec241 | 1081 | |
mbed_official | 155:8435094ec241 | 1082 | @endverbatim |
mbed_official | 155:8435094ec241 | 1083 | * @{ |
mbed_official | 155:8435094ec241 | 1084 | */ |
mbed_official | 155:8435094ec241 | 1085 | |
mbed_official | 155:8435094ec241 | 1086 | /** |
mbed_official | 155:8435094ec241 | 1087 | * @brief Enables or disables the SPIx/I2Sx DMA interface. |
mbed_official | 155:8435094ec241 | 1088 | * @param SPIx:To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 1089 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 1090 | * @param SPI_I2S_DMAReq: specifies the SPI DMA transfer request to be enabled or disabled. |
mbed_official | 155:8435094ec241 | 1091 | * This parameter can be any combination of the following values: |
mbed_official | 155:8435094ec241 | 1092 | * @arg SPI_I2S_DMAReq_Tx: Tx buffer DMA transfer request |
mbed_official | 155:8435094ec241 | 1093 | * @arg SPI_I2S_DMAReq_Rx: Rx buffer DMA transfer request |
mbed_official | 155:8435094ec241 | 1094 | * @param NewState: new state of the selected SPI DMA transfer request. |
mbed_official | 155:8435094ec241 | 1095 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 1096 | * @retval None |
mbed_official | 155:8435094ec241 | 1097 | */ |
mbed_official | 155:8435094ec241 | 1098 | void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 1099 | { |
mbed_official | 155:8435094ec241 | 1100 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1101 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 1102 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 1103 | assert_param(IS_SPI_I2S_DMA_REQ(SPI_I2S_DMAReq)); |
mbed_official | 155:8435094ec241 | 1104 | |
mbed_official | 155:8435094ec241 | 1105 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 1106 | { |
mbed_official | 155:8435094ec241 | 1107 | /* Enable the selected SPI DMA requests */ |
mbed_official | 155:8435094ec241 | 1108 | SPIx->CR2 |= SPI_I2S_DMAReq; |
mbed_official | 155:8435094ec241 | 1109 | } |
mbed_official | 155:8435094ec241 | 1110 | else |
mbed_official | 155:8435094ec241 | 1111 | { |
mbed_official | 155:8435094ec241 | 1112 | /* Disable the selected SPI DMA requests */ |
mbed_official | 155:8435094ec241 | 1113 | SPIx->CR2 &= (uint16_t)~SPI_I2S_DMAReq; |
mbed_official | 155:8435094ec241 | 1114 | } |
mbed_official | 155:8435094ec241 | 1115 | } |
mbed_official | 155:8435094ec241 | 1116 | |
mbed_official | 155:8435094ec241 | 1117 | /** |
mbed_official | 155:8435094ec241 | 1118 | * @brief Configures the number of data to transfer type(Even/Odd) for the DMA |
mbed_official | 155:8435094ec241 | 1119 | * last transfers and for the selected SPI. |
mbed_official | 155:8435094ec241 | 1120 | * @note This function have a meaning only if DMA mode is selected and if |
mbed_official | 155:8435094ec241 | 1121 | * the packing mode is used (data length <= 8 and DMA transfer size halfword) |
mbed_official | 155:8435094ec241 | 1122 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1123 | * @param SPI_LastDMATransfer: specifies the SPI last DMA transfers state. |
mbed_official | 155:8435094ec241 | 1124 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 1125 | * @arg SPI_LastDMATransfer_TxEvenRxEven: Number of data for transmission Even |
mbed_official | 155:8435094ec241 | 1126 | * and number of data for reception Even. |
mbed_official | 155:8435094ec241 | 1127 | * @arg SPI_LastDMATransfer_TxOddRxEven: Number of data for transmission Odd |
mbed_official | 155:8435094ec241 | 1128 | * and number of data for reception Even. |
mbed_official | 155:8435094ec241 | 1129 | * @arg SPI_LastDMATransfer_TxEvenRxOdd: Number of data for transmission Even |
mbed_official | 155:8435094ec241 | 1130 | * and number of data for reception Odd. |
mbed_official | 155:8435094ec241 | 1131 | * @arg SPI_LastDMATransfer_TxOddRxOdd: RNumber of data for transmission Odd |
mbed_official | 155:8435094ec241 | 1132 | * and number of data for reception Odd. |
mbed_official | 155:8435094ec241 | 1133 | * @retval None |
mbed_official | 155:8435094ec241 | 1134 | */ |
mbed_official | 155:8435094ec241 | 1135 | void SPI_LastDMATransferCmd(SPI_TypeDef* SPIx, uint16_t SPI_LastDMATransfer) |
mbed_official | 155:8435094ec241 | 1136 | { |
mbed_official | 155:8435094ec241 | 1137 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1138 | assert_param(IS_SPI_ALL_PERIPH(SPIx)); |
mbed_official | 155:8435094ec241 | 1139 | assert_param(IS_SPI_LAST_DMA_TRANSFER(SPI_LastDMATransfer)); |
mbed_official | 155:8435094ec241 | 1140 | |
mbed_official | 155:8435094ec241 | 1141 | /* Clear LDMA_TX and LDMA_RX bits */ |
mbed_official | 155:8435094ec241 | 1142 | SPIx->CR2 &= CR2_LDMA_MASK; |
mbed_official | 155:8435094ec241 | 1143 | |
mbed_official | 155:8435094ec241 | 1144 | /* Set new LDMA_TX and LDMA_RX bits value */ |
mbed_official | 155:8435094ec241 | 1145 | SPIx->CR2 |= SPI_LastDMATransfer; |
mbed_official | 155:8435094ec241 | 1146 | } |
mbed_official | 155:8435094ec241 | 1147 | |
mbed_official | 155:8435094ec241 | 1148 | /** |
mbed_official | 155:8435094ec241 | 1149 | * @} |
mbed_official | 155:8435094ec241 | 1150 | */ |
mbed_official | 155:8435094ec241 | 1151 | |
mbed_official | 155:8435094ec241 | 1152 | /** @defgroup SPI_Group5 Interrupts and flags management functions |
mbed_official | 155:8435094ec241 | 1153 | * @brief Interrupts and flags management functions |
mbed_official | 155:8435094ec241 | 1154 | * |
mbed_official | 155:8435094ec241 | 1155 | @verbatim |
mbed_official | 155:8435094ec241 | 1156 | =============================================================================== |
mbed_official | 155:8435094ec241 | 1157 | ##### Interrupts and flags management functions ##### |
mbed_official | 155:8435094ec241 | 1158 | =============================================================================== |
mbed_official | 155:8435094ec241 | 1159 | [..] This section provides a set of functions allowing to configure the SPI/I2S |
mbed_official | 155:8435094ec241 | 1160 | Interrupts sources and check or clear the flags or pending bits status. |
mbed_official | 155:8435094ec241 | 1161 | The user should identify which mode will be used in his application to manage |
mbed_official | 155:8435094ec241 | 1162 | the communication: Polling mode, Interrupt mode or DMA mode. |
mbed_official | 155:8435094ec241 | 1163 | |
mbed_official | 155:8435094ec241 | 1164 | *** Polling Mode *** |
mbed_official | 155:8435094ec241 | 1165 | ==================== |
mbed_official | 155:8435094ec241 | 1166 | [..] In Polling Mode, the SPI/I2S communication can be managed by 9 flags: |
mbed_official | 155:8435094ec241 | 1167 | (#) SPI_I2S_FLAG_TXE : to indicate the status of the transmit buffer register. |
mbed_official | 155:8435094ec241 | 1168 | (#) SPI_I2S_FLAG_RXNE : to indicate the status of the receive buffer register. |
mbed_official | 155:8435094ec241 | 1169 | (#) SPI_I2S_FLAG_BSY : to indicate the state of the communication layer of the SPI. |
mbed_official | 155:8435094ec241 | 1170 | (#) SPI_FLAG_CRCERR : to indicate if a CRC Calculation error occur. |
mbed_official | 155:8435094ec241 | 1171 | (#) SPI_FLAG_MODF : to indicate if a Mode Fault error occur. |
mbed_official | 155:8435094ec241 | 1172 | (#) SPI_I2S_FLAG_OVR : to indicate if an Overrun error occur. |
mbed_official | 155:8435094ec241 | 1173 | (#) SPI_I2S_FLAG_FRE: to indicate a Frame Format error occurs. |
mbed_official | 155:8435094ec241 | 1174 | (#) I2S_FLAG_UDR: to indicate an Underrun error occurs. |
mbed_official | 155:8435094ec241 | 1175 | (#) I2S_FLAG_CHSIDE: to indicate Channel Side. |
mbed_official | 155:8435094ec241 | 1176 | [..] |
mbed_official | 155:8435094ec241 | 1177 | (@) Do not use the BSY flag to handle each data transmission or reception. |
mbed_official | 155:8435094ec241 | 1178 | It is better to use the TXE and RXNE flags instead. |
mbed_official | 155:8435094ec241 | 1179 | [..] In this Mode it is advised to use the following functions: |
mbed_official | 155:8435094ec241 | 1180 | (+) FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG); |
mbed_official | 155:8435094ec241 | 1181 | (+) void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG); |
mbed_official | 155:8435094ec241 | 1182 | |
mbed_official | 155:8435094ec241 | 1183 | *** Interrupt Mode *** |
mbed_official | 155:8435094ec241 | 1184 | ====================== |
mbed_official | 155:8435094ec241 | 1185 | [..] In Interrupt Mode, the SPI/I2S communication can be managed by 3 interrupt sources |
mbed_official | 155:8435094ec241 | 1186 | and 5 pending bits: |
mbed_official | 155:8435094ec241 | 1187 | [..] Pending Bits: |
mbed_official | 155:8435094ec241 | 1188 | (#) SPI_I2S_IT_TXE : to indicate the status of the transmit buffer register. |
mbed_official | 155:8435094ec241 | 1189 | (#) SPI_I2S_IT_RXNE : to indicate the status of the receive buffer register. |
mbed_official | 155:8435094ec241 | 1190 | (#) SPI_I2S_IT_OVR : to indicate if an Overrun error occur. |
mbed_official | 155:8435094ec241 | 1191 | (#) I2S_IT_UDR : to indicate an Underrun Error occurs. |
mbed_official | 155:8435094ec241 | 1192 | (#) SPI_I2S_FLAG_FRE : to indicate a Frame Format error occurs. |
mbed_official | 155:8435094ec241 | 1193 | [..] Interrupt Source: |
mbed_official | 155:8435094ec241 | 1194 | (#) SPI_I2S_IT_TXE: specifies the interrupt source for the Tx buffer empty |
mbed_official | 155:8435094ec241 | 1195 | interrupt. |
mbed_official | 155:8435094ec241 | 1196 | (#) SPI_I2S_IT_RXNE : specifies the interrupt source for the Rx buffer not |
mbed_official | 155:8435094ec241 | 1197 | empty interrupt. |
mbed_official | 155:8435094ec241 | 1198 | (#) SPI_I2S_IT_ERR : specifies the interrupt source for the errors interrupt. |
mbed_official | 155:8435094ec241 | 1199 | [..] In this Mode it is advised to use the following functions: |
mbed_official | 155:8435094ec241 | 1200 | (+) void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState); |
mbed_official | 155:8435094ec241 | 1201 | (+) ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT); |
mbed_official | 155:8435094ec241 | 1202 | |
mbed_official | 155:8435094ec241 | 1203 | *** FIFO Status *** |
mbed_official | 155:8435094ec241 | 1204 | =================== |
mbed_official | 155:8435094ec241 | 1205 | [..] It is possible to monitor the FIFO status when a transfer is ongoing using the |
mbed_official | 155:8435094ec241 | 1206 | following function: |
mbed_official | 155:8435094ec241 | 1207 | (+) uint32_t SPI_GetFIFOStatus(uint8_t SPI_FIFO_Direction); |
mbed_official | 155:8435094ec241 | 1208 | |
mbed_official | 155:8435094ec241 | 1209 | *** DMA Mode *** |
mbed_official | 155:8435094ec241 | 1210 | ================ |
mbed_official | 155:8435094ec241 | 1211 | [..] In DMA Mode, the SPI communication can be managed by 2 DMA Channel requests: |
mbed_official | 155:8435094ec241 | 1212 | (#) SPI_I2S_DMAReq_Tx: specifies the Tx buffer DMA transfer request. |
mbed_official | 155:8435094ec241 | 1213 | (#) SPI_I2S_DMAReq_Rx: specifies the Rx buffer DMA transfer request. |
mbed_official | 155:8435094ec241 | 1214 | [..] In this Mode it is advised to use the following function: |
mbed_official | 155:8435094ec241 | 1215 | (+) void SPI_I2S_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_I2S_DMAReq, FunctionalState NewState); |
mbed_official | 155:8435094ec241 | 1216 | |
mbed_official | 155:8435094ec241 | 1217 | @endverbatim |
mbed_official | 155:8435094ec241 | 1218 | * @{ |
mbed_official | 155:8435094ec241 | 1219 | */ |
mbed_official | 155:8435094ec241 | 1220 | |
mbed_official | 155:8435094ec241 | 1221 | /** |
mbed_official | 155:8435094ec241 | 1222 | * @brief Enables or disables the specified SPI/I2S interrupts. |
mbed_official | 155:8435094ec241 | 1223 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 1224 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 1225 | * @param SPI_I2S_IT: specifies the SPI interrupt source to be enabled or disabled. |
mbed_official | 155:8435094ec241 | 1226 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 1227 | * @arg SPI_I2S_IT_TXE: Tx buffer empty interrupt mask |
mbed_official | 155:8435094ec241 | 1228 | * @arg SPI_I2S_IT_RXNE: Rx buffer not empty interrupt mask |
mbed_official | 155:8435094ec241 | 1229 | * @arg SPI_I2S_IT_ERR: Error interrupt mask |
mbed_official | 155:8435094ec241 | 1230 | * @param NewState: new state of the specified SPI interrupt. |
mbed_official | 155:8435094ec241 | 1231 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 155:8435094ec241 | 1232 | * @retval None |
mbed_official | 155:8435094ec241 | 1233 | */ |
mbed_official | 155:8435094ec241 | 1234 | void SPI_I2S_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT, FunctionalState NewState) |
mbed_official | 155:8435094ec241 | 1235 | { |
mbed_official | 155:8435094ec241 | 1236 | uint16_t itpos = 0, itmask = 0 ; |
mbed_official | 155:8435094ec241 | 1237 | |
mbed_official | 155:8435094ec241 | 1238 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1239 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 1240 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 155:8435094ec241 | 1241 | assert_param(IS_SPI_I2S_CONFIG_IT(SPI_I2S_IT)); |
mbed_official | 155:8435094ec241 | 1242 | |
mbed_official | 155:8435094ec241 | 1243 | /* Get the SPI IT index */ |
mbed_official | 155:8435094ec241 | 1244 | itpos = SPI_I2S_IT >> 4; |
mbed_official | 155:8435094ec241 | 1245 | |
mbed_official | 155:8435094ec241 | 1246 | /* Set the IT mask */ |
mbed_official | 155:8435094ec241 | 1247 | itmask = (uint16_t)1 << (uint16_t)itpos; |
mbed_official | 155:8435094ec241 | 1248 | |
mbed_official | 155:8435094ec241 | 1249 | if (NewState != DISABLE) |
mbed_official | 155:8435094ec241 | 1250 | { |
mbed_official | 155:8435094ec241 | 1251 | /* Enable the selected SPI interrupt */ |
mbed_official | 155:8435094ec241 | 1252 | SPIx->CR2 |= itmask; |
mbed_official | 155:8435094ec241 | 1253 | } |
mbed_official | 155:8435094ec241 | 1254 | else |
mbed_official | 155:8435094ec241 | 1255 | { |
mbed_official | 155:8435094ec241 | 1256 | /* Disable the selected SPI interrupt */ |
mbed_official | 155:8435094ec241 | 1257 | SPIx->CR2 &= (uint16_t)~itmask; |
mbed_official | 155:8435094ec241 | 1258 | } |
mbed_official | 155:8435094ec241 | 1259 | } |
mbed_official | 155:8435094ec241 | 1260 | |
mbed_official | 155:8435094ec241 | 1261 | /** |
mbed_official | 155:8435094ec241 | 1262 | * @brief Returns the current SPIx Transmission FIFO filled level. |
mbed_official | 155:8435094ec241 | 1263 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1264 | * @retval The Transmission FIFO filling state. |
mbed_official | 155:8435094ec241 | 1265 | * - SPI_TransmissionFIFOStatus_Empty: when FIFO is empty |
mbed_official | 155:8435094ec241 | 1266 | * - SPI_TransmissionFIFOStatus_1QuarterFull: if more than 1 quarter-full. |
mbed_official | 155:8435094ec241 | 1267 | * - SPI_TransmissionFIFOStatus_HalfFull: if more than 1 half-full. |
mbed_official | 155:8435094ec241 | 1268 | * - SPI_TransmissionFIFOStatus_Full: when FIFO is full. |
mbed_official | 155:8435094ec241 | 1269 | */ |
mbed_official | 155:8435094ec241 | 1270 | uint16_t SPI_GetTransmissionFIFOStatus(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 1271 | { |
mbed_official | 155:8435094ec241 | 1272 | /* Get the SPIx Transmission FIFO level bits */ |
mbed_official | 155:8435094ec241 | 1273 | return (uint16_t)((SPIx->SR & SPI_SR_FTLVL)); |
mbed_official | 155:8435094ec241 | 1274 | } |
mbed_official | 155:8435094ec241 | 1275 | |
mbed_official | 155:8435094ec241 | 1276 | /** |
mbed_official | 155:8435094ec241 | 1277 | * @brief Returns the current SPIx Reception FIFO filled level. |
mbed_official | 155:8435094ec241 | 1278 | * @param SPIx: where x can be 1, 2 or 3 to select the SPI peripheral. |
mbed_official | 155:8435094ec241 | 1279 | * @retval The Reception FIFO filling state. |
mbed_official | 155:8435094ec241 | 1280 | * - SPI_ReceptionFIFOStatus_Empty: when FIFO is empty |
mbed_official | 155:8435094ec241 | 1281 | * - SPI_ReceptionFIFOStatus_1QuarterFull: if more than 1 quarter-full. |
mbed_official | 155:8435094ec241 | 1282 | * - SPI_ReceptionFIFOStatus_HalfFull: if more than 1 half-full. |
mbed_official | 155:8435094ec241 | 1283 | * - SPI_ReceptionFIFOStatus_Full: when FIFO is full. |
mbed_official | 155:8435094ec241 | 1284 | */ |
mbed_official | 155:8435094ec241 | 1285 | uint16_t SPI_GetReceptionFIFOStatus(SPI_TypeDef* SPIx) |
mbed_official | 155:8435094ec241 | 1286 | { |
mbed_official | 155:8435094ec241 | 1287 | /* Get the SPIx Reception FIFO level bits */ |
mbed_official | 155:8435094ec241 | 1288 | return (uint16_t)((SPIx->SR & SPI_SR_FRLVL)); |
mbed_official | 155:8435094ec241 | 1289 | } |
mbed_official | 155:8435094ec241 | 1290 | |
mbed_official | 155:8435094ec241 | 1291 | /** |
mbed_official | 155:8435094ec241 | 1292 | * @brief Checks whether the specified SPI flag is set or not. |
mbed_official | 155:8435094ec241 | 1293 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 1294 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 1295 | * @param SPI_I2S_FLAG: specifies the SPI flag to check. |
mbed_official | 155:8435094ec241 | 1296 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 1297 | * @arg SPI_I2S_FLAG_TXE: Transmit buffer empty flag. |
mbed_official | 155:8435094ec241 | 1298 | * @arg SPI_I2S_FLAG_RXNE: Receive buffer not empty flag. |
mbed_official | 155:8435094ec241 | 1299 | * @arg SPI_I2S_FLAG_BSY: Busy flag. |
mbed_official | 155:8435094ec241 | 1300 | * @arg SPI_I2S_FLAG_OVR: Overrun flag. |
mbed_official | 155:8435094ec241 | 1301 | * @arg SPI_I2S_FLAG_MODF: Mode Fault flag. |
mbed_official | 155:8435094ec241 | 1302 | * @arg SPI_I2S_FLAG_CRCERR: CRC Error flag. |
mbed_official | 155:8435094ec241 | 1303 | * @arg SPI_I2S_FLAG_FRE: TI frame format error flag. |
mbed_official | 155:8435094ec241 | 1304 | * @arg I2S_FLAG_UDR: Underrun Error flag. |
mbed_official | 155:8435094ec241 | 1305 | * @arg I2S_FLAG_CHSIDE: Channel Side flag. |
mbed_official | 155:8435094ec241 | 1306 | * @retval The new state of SPI_I2S_FLAG (SET or RESET). |
mbed_official | 155:8435094ec241 | 1307 | */ |
mbed_official | 155:8435094ec241 | 1308 | FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG) |
mbed_official | 155:8435094ec241 | 1309 | { |
mbed_official | 155:8435094ec241 | 1310 | FlagStatus bitstatus = RESET; |
mbed_official | 155:8435094ec241 | 1311 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1312 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 1313 | assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG)); |
mbed_official | 155:8435094ec241 | 1314 | |
mbed_official | 155:8435094ec241 | 1315 | /* Check the status of the specified SPI flag */ |
mbed_official | 155:8435094ec241 | 1316 | if ((SPIx->SR & SPI_I2S_FLAG) != (uint16_t)RESET) |
mbed_official | 155:8435094ec241 | 1317 | { |
mbed_official | 155:8435094ec241 | 1318 | /* SPI_I2S_FLAG is set */ |
mbed_official | 155:8435094ec241 | 1319 | bitstatus = SET; |
mbed_official | 155:8435094ec241 | 1320 | } |
mbed_official | 155:8435094ec241 | 1321 | else |
mbed_official | 155:8435094ec241 | 1322 | { |
mbed_official | 155:8435094ec241 | 1323 | /* SPI_I2S_FLAG is reset */ |
mbed_official | 155:8435094ec241 | 1324 | bitstatus = RESET; |
mbed_official | 155:8435094ec241 | 1325 | } |
mbed_official | 155:8435094ec241 | 1326 | /* Return the SPI_I2S_FLAG status */ |
mbed_official | 155:8435094ec241 | 1327 | return bitstatus; |
mbed_official | 155:8435094ec241 | 1328 | } |
mbed_official | 155:8435094ec241 | 1329 | |
mbed_official | 155:8435094ec241 | 1330 | /** |
mbed_official | 155:8435094ec241 | 1331 | * @brief Clears the SPIx CRC Error (CRCERR) flag. |
mbed_official | 155:8435094ec241 | 1332 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 1333 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 1334 | * @param SPI_I2S_FLAG: specifies the SPI flag to clear. |
mbed_official | 155:8435094ec241 | 1335 | * This function clears only CRCERR flag. |
mbed_official | 155:8435094ec241 | 1336 | * @note OVR (OverRun error) flag is cleared by software sequence: a read |
mbed_official | 155:8435094ec241 | 1337 | * operation to SPI_DR register (SPI_I2S_ReceiveData()) followed by a read |
mbed_official | 155:8435094ec241 | 1338 | * operation to SPI_SR register (SPI_I2S_GetFlagStatus()). |
mbed_official | 155:8435094ec241 | 1339 | * @note MODF (Mode Fault) flag is cleared by software sequence: a read/write |
mbed_official | 155:8435094ec241 | 1340 | * operation to SPI_SR register (SPI_I2S_GetFlagStatus()) followed by a |
mbed_official | 155:8435094ec241 | 1341 | * write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI). |
mbed_official | 155:8435094ec241 | 1342 | * @retval None |
mbed_official | 155:8435094ec241 | 1343 | */ |
mbed_official | 155:8435094ec241 | 1344 | void SPI_I2S_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG) |
mbed_official | 155:8435094ec241 | 1345 | { |
mbed_official | 155:8435094ec241 | 1346 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1347 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 1348 | assert_param(IS_SPI_CLEAR_FLAG(SPI_I2S_FLAG)); |
mbed_official | 155:8435094ec241 | 1349 | |
mbed_official | 155:8435094ec241 | 1350 | /* Clear the selected SPI CRC Error (CRCERR) flag */ |
mbed_official | 155:8435094ec241 | 1351 | SPIx->SR = (uint16_t)~SPI_I2S_FLAG; |
mbed_official | 155:8435094ec241 | 1352 | } |
mbed_official | 155:8435094ec241 | 1353 | |
mbed_official | 155:8435094ec241 | 1354 | /** |
mbed_official | 155:8435094ec241 | 1355 | * @brief Checks whether the specified SPI/I2S interrupt has occurred or not. |
mbed_official | 155:8435094ec241 | 1356 | * @param SPIx: To select the SPIx/I2Sx peripheral, where x can be: 1, 2 or 3 |
mbed_official | 155:8435094ec241 | 1357 | * in SPI mode or 2 or 3 in I2S mode or I2Sxext for I2S full duplex mode. |
mbed_official | 155:8435094ec241 | 1358 | * @param SPI_I2S_IT: specifies the SPI interrupt source to check. |
mbed_official | 155:8435094ec241 | 1359 | * This parameter can be one of the following values: |
mbed_official | 155:8435094ec241 | 1360 | * @arg SPI_I2S_IT_TXE: Transmit buffer empty interrupt. |
mbed_official | 155:8435094ec241 | 1361 | * @arg SPI_I2S_IT_RXNE: Receive buffer not empty interrupt. |
mbed_official | 155:8435094ec241 | 1362 | * @arg SPI_IT_MODF: Mode Fault interrupt. |
mbed_official | 155:8435094ec241 | 1363 | * @arg SPI_I2S_IT_OVR: Overrun interrupt. |
mbed_official | 155:8435094ec241 | 1364 | * @arg I2S_IT_UDR: Underrun interrupt. |
mbed_official | 155:8435094ec241 | 1365 | * @arg SPI_I2S_IT_FRE: Format Error interrupt. |
mbed_official | 155:8435094ec241 | 1366 | * @retval The new state of SPI_I2S_IT (SET or RESET). |
mbed_official | 155:8435094ec241 | 1367 | */ |
mbed_official | 155:8435094ec241 | 1368 | ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT) |
mbed_official | 155:8435094ec241 | 1369 | { |
mbed_official | 155:8435094ec241 | 1370 | ITStatus bitstatus = RESET; |
mbed_official | 155:8435094ec241 | 1371 | uint16_t itpos = 0, itmask = 0, enablestatus = 0; |
mbed_official | 155:8435094ec241 | 1372 | |
mbed_official | 155:8435094ec241 | 1373 | /* Check the parameters */ |
mbed_official | 155:8435094ec241 | 1374 | assert_param(IS_SPI_ALL_PERIPH_EXT(SPIx)); |
mbed_official | 155:8435094ec241 | 1375 | assert_param(IS_SPI_I2S_GET_IT(SPI_I2S_IT)); |
mbed_official | 155:8435094ec241 | 1376 | |
mbed_official | 155:8435094ec241 | 1377 | /* Get the SPI_I2S_IT index */ |
mbed_official | 155:8435094ec241 | 1378 | itpos = 0x01 << (SPI_I2S_IT & 0x0F); |
mbed_official | 155:8435094ec241 | 1379 | |
mbed_official | 155:8435094ec241 | 1380 | /* Get the SPI_I2S_IT IT mask */ |
mbed_official | 155:8435094ec241 | 1381 | itmask = SPI_I2S_IT >> 4; |
mbed_official | 155:8435094ec241 | 1382 | |
mbed_official | 155:8435094ec241 | 1383 | /* Set the IT mask */ |
mbed_official | 155:8435094ec241 | 1384 | itmask = 0x01 << itmask; |
mbed_official | 155:8435094ec241 | 1385 | |
mbed_official | 155:8435094ec241 | 1386 | /* Get the SPI_I2S_IT enable bit status */ |
mbed_official | 155:8435094ec241 | 1387 | enablestatus = (SPIx->CR2 & itmask) ; |
mbed_official | 155:8435094ec241 | 1388 | |
mbed_official | 155:8435094ec241 | 1389 | /* Check the status of the specified SPI interrupt */ |
mbed_official | 155:8435094ec241 | 1390 | if (((SPIx->SR & itpos) != (uint16_t)RESET) && enablestatus) |
mbed_official | 155:8435094ec241 | 1391 | { |
mbed_official | 155:8435094ec241 | 1392 | /* SPI_I2S_IT is set */ |
mbed_official | 155:8435094ec241 | 1393 | bitstatus = SET; |
mbed_official | 155:8435094ec241 | 1394 | } |
mbed_official | 155:8435094ec241 | 1395 | else |
mbed_official | 155:8435094ec241 | 1396 | { |
mbed_official | 155:8435094ec241 | 1397 | /* SPI_I2S_IT is reset */ |
mbed_official | 155:8435094ec241 | 1398 | bitstatus = RESET; |
mbed_official | 155:8435094ec241 | 1399 | } |
mbed_official | 155:8435094ec241 | 1400 | /* Return the SPI_I2S_IT status */ |
mbed_official | 155:8435094ec241 | 1401 | return bitstatus; |
mbed_official | 155:8435094ec241 | 1402 | } |
mbed_official | 155:8435094ec241 | 1403 | |
mbed_official | 155:8435094ec241 | 1404 | /** |
mbed_official | 155:8435094ec241 | 1405 | * @} |
mbed_official | 155:8435094ec241 | 1406 | */ |
mbed_official | 155:8435094ec241 | 1407 | |
mbed_official | 155:8435094ec241 | 1408 | /** |
mbed_official | 155:8435094ec241 | 1409 | * @} |
mbed_official | 155:8435094ec241 | 1410 | */ |
mbed_official | 155:8435094ec241 | 1411 | |
mbed_official | 155:8435094ec241 | 1412 | /** |
mbed_official | 155:8435094ec241 | 1413 | * @} |
mbed_official | 155:8435094ec241 | 1414 | */ |
mbed_official | 155:8435094ec241 | 1415 | |
mbed_official | 155:8435094ec241 | 1416 | /** |
mbed_official | 155:8435094ec241 | 1417 | * @} |
mbed_official | 155:8435094ec241 | 1418 | */ |
mbed_official | 155:8435094ec241 | 1419 | |
mbed_official | 155:8435094ec241 | 1420 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |