mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_DISCO_F100RB/stm32f10x_i2c.c@310:6188e0254baa, 2014-09-16 (annotated)
- Committer:
- janekm
- Date:
- Tue Sep 16 22:42:01 2014 +0000
- Revision:
- 310:6188e0254baa
- Parent:
- 126:549ba18ddd81
N/A
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 126:549ba18ddd81 | 1 | /** |
mbed_official | 126:549ba18ddd81 | 2 | ****************************************************************************** |
mbed_official | 126:549ba18ddd81 | 3 | * @file stm32f10x_i2c.c |
mbed_official | 126:549ba18ddd81 | 4 | * @author MCD Application Team |
mbed_official | 126:549ba18ddd81 | 5 | * @version V3.6.1 |
mbed_official | 126:549ba18ddd81 | 6 | * @date 05-March-2012 |
mbed_official | 126:549ba18ddd81 | 7 | * @brief This file provides all the I2C firmware functions. |
mbed_official | 126:549ba18ddd81 | 8 | ******************************************************************************* |
mbed_official | 126:549ba18ddd81 | 9 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 126:549ba18ddd81 | 10 | * All rights reserved. |
mbed_official | 126:549ba18ddd81 | 11 | * |
mbed_official | 126:549ba18ddd81 | 12 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 126:549ba18ddd81 | 13 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 126:549ba18ddd81 | 14 | * |
mbed_official | 126:549ba18ddd81 | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 126:549ba18ddd81 | 16 | * this list of conditions and the following disclaimer. |
mbed_official | 126:549ba18ddd81 | 17 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 126:549ba18ddd81 | 18 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 126:549ba18ddd81 | 19 | * and/or other materials provided with the distribution. |
mbed_official | 126:549ba18ddd81 | 20 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 126:549ba18ddd81 | 21 | * may be used to endorse or promote products derived from this software |
mbed_official | 126:549ba18ddd81 | 22 | * without specific prior written permission. |
mbed_official | 126:549ba18ddd81 | 23 | * |
mbed_official | 126:549ba18ddd81 | 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 126:549ba18ddd81 | 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 126:549ba18ddd81 | 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 126:549ba18ddd81 | 27 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 126:549ba18ddd81 | 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 126:549ba18ddd81 | 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 126:549ba18ddd81 | 30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 126:549ba18ddd81 | 31 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 126:549ba18ddd81 | 32 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 126:549ba18ddd81 | 33 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 126:549ba18ddd81 | 34 | ******************************************************************************* |
mbed_official | 126:549ba18ddd81 | 35 | */ |
mbed_official | 126:549ba18ddd81 | 36 | |
mbed_official | 126:549ba18ddd81 | 37 | /* Includes ------------------------------------------------------------------*/ |
mbed_official | 126:549ba18ddd81 | 38 | #include "stm32f10x_i2c.h" |
mbed_official | 126:549ba18ddd81 | 39 | #include "stm32f10x_rcc.h" |
mbed_official | 126:549ba18ddd81 | 40 | |
mbed_official | 126:549ba18ddd81 | 41 | |
mbed_official | 126:549ba18ddd81 | 42 | /** @addtogroup STM32F10x_StdPeriph_Driver |
mbed_official | 126:549ba18ddd81 | 43 | * @{ |
mbed_official | 126:549ba18ddd81 | 44 | */ |
mbed_official | 126:549ba18ddd81 | 45 | |
mbed_official | 126:549ba18ddd81 | 46 | /** @defgroup I2C |
mbed_official | 126:549ba18ddd81 | 47 | * @brief I2C driver modules |
mbed_official | 126:549ba18ddd81 | 48 | * @{ |
mbed_official | 126:549ba18ddd81 | 49 | */ |
mbed_official | 126:549ba18ddd81 | 50 | |
mbed_official | 126:549ba18ddd81 | 51 | /** @defgroup I2C_Private_TypesDefinitions |
mbed_official | 126:549ba18ddd81 | 52 | * @{ |
mbed_official | 126:549ba18ddd81 | 53 | */ |
mbed_official | 126:549ba18ddd81 | 54 | |
mbed_official | 126:549ba18ddd81 | 55 | /** |
mbed_official | 126:549ba18ddd81 | 56 | * @} |
mbed_official | 126:549ba18ddd81 | 57 | */ |
mbed_official | 126:549ba18ddd81 | 58 | |
mbed_official | 126:549ba18ddd81 | 59 | /** @defgroup I2C_Private_Defines |
mbed_official | 126:549ba18ddd81 | 60 | * @{ |
mbed_official | 126:549ba18ddd81 | 61 | */ |
mbed_official | 126:549ba18ddd81 | 62 | |
mbed_official | 126:549ba18ddd81 | 63 | /* I2C SPE mask */ |
mbed_official | 126:549ba18ddd81 | 64 | #define CR1_PE_Set ((uint16_t)0x0001) |
mbed_official | 126:549ba18ddd81 | 65 | #define CR1_PE_Reset ((uint16_t)0xFFFE) |
mbed_official | 126:549ba18ddd81 | 66 | |
mbed_official | 126:549ba18ddd81 | 67 | /* I2C START mask */ |
mbed_official | 126:549ba18ddd81 | 68 | #define CR1_START_Set ((uint16_t)0x0100) |
mbed_official | 126:549ba18ddd81 | 69 | #define CR1_START_Reset ((uint16_t)0xFEFF) |
mbed_official | 126:549ba18ddd81 | 70 | |
mbed_official | 126:549ba18ddd81 | 71 | /* I2C STOP mask */ |
mbed_official | 126:549ba18ddd81 | 72 | #define CR1_STOP_Set ((uint16_t)0x0200) |
mbed_official | 126:549ba18ddd81 | 73 | #define CR1_STOP_Reset ((uint16_t)0xFDFF) |
mbed_official | 126:549ba18ddd81 | 74 | |
mbed_official | 126:549ba18ddd81 | 75 | /* I2C ACK mask */ |
mbed_official | 126:549ba18ddd81 | 76 | #define CR1_ACK_Set ((uint16_t)0x0400) |
mbed_official | 126:549ba18ddd81 | 77 | #define CR1_ACK_Reset ((uint16_t)0xFBFF) |
mbed_official | 126:549ba18ddd81 | 78 | |
mbed_official | 126:549ba18ddd81 | 79 | /* I2C ENGC mask */ |
mbed_official | 126:549ba18ddd81 | 80 | #define CR1_ENGC_Set ((uint16_t)0x0040) |
mbed_official | 126:549ba18ddd81 | 81 | #define CR1_ENGC_Reset ((uint16_t)0xFFBF) |
mbed_official | 126:549ba18ddd81 | 82 | |
mbed_official | 126:549ba18ddd81 | 83 | /* I2C SWRST mask */ |
mbed_official | 126:549ba18ddd81 | 84 | #define CR1_SWRST_Set ((uint16_t)0x8000) |
mbed_official | 126:549ba18ddd81 | 85 | #define CR1_SWRST_Reset ((uint16_t)0x7FFF) |
mbed_official | 126:549ba18ddd81 | 86 | |
mbed_official | 126:549ba18ddd81 | 87 | /* I2C PEC mask */ |
mbed_official | 126:549ba18ddd81 | 88 | #define CR1_PEC_Set ((uint16_t)0x1000) |
mbed_official | 126:549ba18ddd81 | 89 | #define CR1_PEC_Reset ((uint16_t)0xEFFF) |
mbed_official | 126:549ba18ddd81 | 90 | |
mbed_official | 126:549ba18ddd81 | 91 | /* I2C ENPEC mask */ |
mbed_official | 126:549ba18ddd81 | 92 | #define CR1_ENPEC_Set ((uint16_t)0x0020) |
mbed_official | 126:549ba18ddd81 | 93 | #define CR1_ENPEC_Reset ((uint16_t)0xFFDF) |
mbed_official | 126:549ba18ddd81 | 94 | |
mbed_official | 126:549ba18ddd81 | 95 | /* I2C ENARP mask */ |
mbed_official | 126:549ba18ddd81 | 96 | #define CR1_ENARP_Set ((uint16_t)0x0010) |
mbed_official | 126:549ba18ddd81 | 97 | #define CR1_ENARP_Reset ((uint16_t)0xFFEF) |
mbed_official | 126:549ba18ddd81 | 98 | |
mbed_official | 126:549ba18ddd81 | 99 | /* I2C NOSTRETCH mask */ |
mbed_official | 126:549ba18ddd81 | 100 | #define CR1_NOSTRETCH_Set ((uint16_t)0x0080) |
mbed_official | 126:549ba18ddd81 | 101 | #define CR1_NOSTRETCH_Reset ((uint16_t)0xFF7F) |
mbed_official | 126:549ba18ddd81 | 102 | |
mbed_official | 126:549ba18ddd81 | 103 | /* I2C registers Masks */ |
mbed_official | 126:549ba18ddd81 | 104 | #define CR1_CLEAR_Mask ((uint16_t)0xFBF5) |
mbed_official | 126:549ba18ddd81 | 105 | |
mbed_official | 126:549ba18ddd81 | 106 | /* I2C DMAEN mask */ |
mbed_official | 126:549ba18ddd81 | 107 | #define CR2_DMAEN_Set ((uint16_t)0x0800) |
mbed_official | 126:549ba18ddd81 | 108 | #define CR2_DMAEN_Reset ((uint16_t)0xF7FF) |
mbed_official | 126:549ba18ddd81 | 109 | |
mbed_official | 126:549ba18ddd81 | 110 | /* I2C LAST mask */ |
mbed_official | 126:549ba18ddd81 | 111 | #define CR2_LAST_Set ((uint16_t)0x1000) |
mbed_official | 126:549ba18ddd81 | 112 | #define CR2_LAST_Reset ((uint16_t)0xEFFF) |
mbed_official | 126:549ba18ddd81 | 113 | |
mbed_official | 126:549ba18ddd81 | 114 | /* I2C FREQ mask */ |
mbed_official | 126:549ba18ddd81 | 115 | #define CR2_FREQ_Reset ((uint16_t)0xFFC0) |
mbed_official | 126:549ba18ddd81 | 116 | |
mbed_official | 126:549ba18ddd81 | 117 | /* I2C ADD0 mask */ |
mbed_official | 126:549ba18ddd81 | 118 | #define OAR1_ADD0_Set ((uint16_t)0x0001) |
mbed_official | 126:549ba18ddd81 | 119 | #define OAR1_ADD0_Reset ((uint16_t)0xFFFE) |
mbed_official | 126:549ba18ddd81 | 120 | |
mbed_official | 126:549ba18ddd81 | 121 | /* I2C ENDUAL mask */ |
mbed_official | 126:549ba18ddd81 | 122 | #define OAR2_ENDUAL_Set ((uint16_t)0x0001) |
mbed_official | 126:549ba18ddd81 | 123 | #define OAR2_ENDUAL_Reset ((uint16_t)0xFFFE) |
mbed_official | 126:549ba18ddd81 | 124 | |
mbed_official | 126:549ba18ddd81 | 125 | /* I2C ADD2 mask */ |
mbed_official | 126:549ba18ddd81 | 126 | #define OAR2_ADD2_Reset ((uint16_t)0xFF01) |
mbed_official | 126:549ba18ddd81 | 127 | |
mbed_official | 126:549ba18ddd81 | 128 | /* I2C F/S mask */ |
mbed_official | 126:549ba18ddd81 | 129 | #define CCR_FS_Set ((uint16_t)0x8000) |
mbed_official | 126:549ba18ddd81 | 130 | |
mbed_official | 126:549ba18ddd81 | 131 | /* I2C CCR mask */ |
mbed_official | 126:549ba18ddd81 | 132 | #define CCR_CCR_Set ((uint16_t)0x0FFF) |
mbed_official | 126:549ba18ddd81 | 133 | |
mbed_official | 126:549ba18ddd81 | 134 | /* I2C FLAG mask */ |
mbed_official | 126:549ba18ddd81 | 135 | #define FLAG_Mask ((uint32_t)0x00FFFFFF) |
mbed_official | 126:549ba18ddd81 | 136 | |
mbed_official | 126:549ba18ddd81 | 137 | /* I2C Interrupt Enable mask */ |
mbed_official | 126:549ba18ddd81 | 138 | #define ITEN_Mask ((uint32_t)0x07000000) |
mbed_official | 126:549ba18ddd81 | 139 | |
mbed_official | 126:549ba18ddd81 | 140 | /** |
mbed_official | 126:549ba18ddd81 | 141 | * @} |
mbed_official | 126:549ba18ddd81 | 142 | */ |
mbed_official | 126:549ba18ddd81 | 143 | |
mbed_official | 126:549ba18ddd81 | 144 | /** @defgroup I2C_Private_Macros |
mbed_official | 126:549ba18ddd81 | 145 | * @{ |
mbed_official | 126:549ba18ddd81 | 146 | */ |
mbed_official | 126:549ba18ddd81 | 147 | |
mbed_official | 126:549ba18ddd81 | 148 | /** |
mbed_official | 126:549ba18ddd81 | 149 | * @} |
mbed_official | 126:549ba18ddd81 | 150 | */ |
mbed_official | 126:549ba18ddd81 | 151 | |
mbed_official | 126:549ba18ddd81 | 152 | /** @defgroup I2C_Private_Variables |
mbed_official | 126:549ba18ddd81 | 153 | * @{ |
mbed_official | 126:549ba18ddd81 | 154 | */ |
mbed_official | 126:549ba18ddd81 | 155 | |
mbed_official | 126:549ba18ddd81 | 156 | /** |
mbed_official | 126:549ba18ddd81 | 157 | * @} |
mbed_official | 126:549ba18ddd81 | 158 | */ |
mbed_official | 126:549ba18ddd81 | 159 | |
mbed_official | 126:549ba18ddd81 | 160 | /** @defgroup I2C_Private_FunctionPrototypes |
mbed_official | 126:549ba18ddd81 | 161 | * @{ |
mbed_official | 126:549ba18ddd81 | 162 | */ |
mbed_official | 126:549ba18ddd81 | 163 | |
mbed_official | 126:549ba18ddd81 | 164 | /** |
mbed_official | 126:549ba18ddd81 | 165 | * @} |
mbed_official | 126:549ba18ddd81 | 166 | */ |
mbed_official | 126:549ba18ddd81 | 167 | |
mbed_official | 126:549ba18ddd81 | 168 | /** @defgroup I2C_Private_Functions |
mbed_official | 126:549ba18ddd81 | 169 | * @{ |
mbed_official | 126:549ba18ddd81 | 170 | */ |
mbed_official | 126:549ba18ddd81 | 171 | |
mbed_official | 126:549ba18ddd81 | 172 | /** |
mbed_official | 126:549ba18ddd81 | 173 | * @brief Deinitializes the I2Cx peripheral registers to their default reset values. |
mbed_official | 126:549ba18ddd81 | 174 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 175 | * @retval None |
mbed_official | 126:549ba18ddd81 | 176 | */ |
mbed_official | 126:549ba18ddd81 | 177 | void I2C_DeInit(I2C_TypeDef* I2Cx) |
mbed_official | 126:549ba18ddd81 | 178 | { |
mbed_official | 126:549ba18ddd81 | 179 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 180 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 181 | |
mbed_official | 126:549ba18ddd81 | 182 | if (I2Cx == I2C1) |
mbed_official | 126:549ba18ddd81 | 183 | { |
mbed_official | 126:549ba18ddd81 | 184 | /* Enable I2C1 reset state */ |
mbed_official | 126:549ba18ddd81 | 185 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE); |
mbed_official | 126:549ba18ddd81 | 186 | /* Release I2C1 from reset state */ |
mbed_official | 126:549ba18ddd81 | 187 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE); |
mbed_official | 126:549ba18ddd81 | 188 | } |
mbed_official | 126:549ba18ddd81 | 189 | else |
mbed_official | 126:549ba18ddd81 | 190 | { |
mbed_official | 126:549ba18ddd81 | 191 | /* Enable I2C2 reset state */ |
mbed_official | 126:549ba18ddd81 | 192 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, ENABLE); |
mbed_official | 126:549ba18ddd81 | 193 | /* Release I2C2 from reset state */ |
mbed_official | 126:549ba18ddd81 | 194 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C2, DISABLE); |
mbed_official | 126:549ba18ddd81 | 195 | } |
mbed_official | 126:549ba18ddd81 | 196 | } |
mbed_official | 126:549ba18ddd81 | 197 | |
mbed_official | 126:549ba18ddd81 | 198 | /** |
mbed_official | 126:549ba18ddd81 | 199 | * @brief Initializes the I2Cx peripheral according to the specified |
mbed_official | 126:549ba18ddd81 | 200 | * parameters in the I2C_InitStruct. |
mbed_official | 126:549ba18ddd81 | 201 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 202 | * @param I2C_InitStruct: pointer to a I2C_InitTypeDef structure that |
mbed_official | 126:549ba18ddd81 | 203 | * contains the configuration information for the specified I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 204 | * @retval None |
mbed_official | 126:549ba18ddd81 | 205 | */ |
mbed_official | 126:549ba18ddd81 | 206 | void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct) |
mbed_official | 126:549ba18ddd81 | 207 | { |
mbed_official | 126:549ba18ddd81 | 208 | uint16_t tmpreg = 0, freqrange = 0; |
mbed_official | 126:549ba18ddd81 | 209 | uint16_t result = 0x04; |
mbed_official | 126:549ba18ddd81 | 210 | uint32_t pclk1 = 8000000; |
mbed_official | 126:549ba18ddd81 | 211 | RCC_ClocksTypeDef rcc_clocks; |
mbed_official | 126:549ba18ddd81 | 212 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 213 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 214 | assert_param(IS_I2C_CLOCK_SPEED(I2C_InitStruct->I2C_ClockSpeed)); |
mbed_official | 126:549ba18ddd81 | 215 | assert_param(IS_I2C_MODE(I2C_InitStruct->I2C_Mode)); |
mbed_official | 126:549ba18ddd81 | 216 | assert_param(IS_I2C_DUTY_CYCLE(I2C_InitStruct->I2C_DutyCycle)); |
mbed_official | 126:549ba18ddd81 | 217 | assert_param(IS_I2C_OWN_ADDRESS1(I2C_InitStruct->I2C_OwnAddress1)); |
mbed_official | 126:549ba18ddd81 | 218 | assert_param(IS_I2C_ACK_STATE(I2C_InitStruct->I2C_Ack)); |
mbed_official | 126:549ba18ddd81 | 219 | assert_param(IS_I2C_ACKNOWLEDGE_ADDRESS(I2C_InitStruct->I2C_AcknowledgedAddress)); |
mbed_official | 126:549ba18ddd81 | 220 | |
mbed_official | 126:549ba18ddd81 | 221 | /*---------------------------- I2Cx CR2 Configuration ------------------------*/ |
mbed_official | 126:549ba18ddd81 | 222 | /* Get the I2Cx CR2 value */ |
mbed_official | 126:549ba18ddd81 | 223 | tmpreg = I2Cx->CR2; |
mbed_official | 126:549ba18ddd81 | 224 | /* Clear frequency FREQ[5:0] bits */ |
mbed_official | 126:549ba18ddd81 | 225 | tmpreg &= CR2_FREQ_Reset; |
mbed_official | 126:549ba18ddd81 | 226 | /* Get pclk1 frequency value */ |
mbed_official | 126:549ba18ddd81 | 227 | RCC_GetClocksFreq(&rcc_clocks); |
mbed_official | 126:549ba18ddd81 | 228 | pclk1 = rcc_clocks.PCLK1_Frequency; |
mbed_official | 126:549ba18ddd81 | 229 | /* Set frequency bits depending on pclk1 value */ |
mbed_official | 126:549ba18ddd81 | 230 | freqrange = (uint16_t)(pclk1 / 1000000); |
mbed_official | 126:549ba18ddd81 | 231 | tmpreg |= freqrange; |
mbed_official | 126:549ba18ddd81 | 232 | /* Write to I2Cx CR2 */ |
mbed_official | 126:549ba18ddd81 | 233 | I2Cx->CR2 = tmpreg; |
mbed_official | 126:549ba18ddd81 | 234 | |
mbed_official | 126:549ba18ddd81 | 235 | /*---------------------------- I2Cx CCR Configuration ------------------------*/ |
mbed_official | 126:549ba18ddd81 | 236 | /* Disable the selected I2C peripheral to configure TRISE */ |
mbed_official | 126:549ba18ddd81 | 237 | I2Cx->CR1 &= CR1_PE_Reset; |
mbed_official | 126:549ba18ddd81 | 238 | /* Reset tmpreg value */ |
mbed_official | 126:549ba18ddd81 | 239 | /* Clear F/S, DUTY and CCR[11:0] bits */ |
mbed_official | 126:549ba18ddd81 | 240 | tmpreg = 0; |
mbed_official | 126:549ba18ddd81 | 241 | |
mbed_official | 126:549ba18ddd81 | 242 | /* Configure speed in standard mode */ |
mbed_official | 126:549ba18ddd81 | 243 | if (I2C_InitStruct->I2C_ClockSpeed <= 100000) |
mbed_official | 126:549ba18ddd81 | 244 | { |
mbed_official | 126:549ba18ddd81 | 245 | /* Standard mode speed calculate */ |
mbed_official | 126:549ba18ddd81 | 246 | result = (uint16_t)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed << 1)); |
mbed_official | 126:549ba18ddd81 | 247 | /* Test if CCR value is under 0x4*/ |
mbed_official | 126:549ba18ddd81 | 248 | if (result < 0x04) |
mbed_official | 126:549ba18ddd81 | 249 | { |
mbed_official | 126:549ba18ddd81 | 250 | /* Set minimum allowed value */ |
mbed_official | 126:549ba18ddd81 | 251 | result = 0x04; |
mbed_official | 126:549ba18ddd81 | 252 | } |
mbed_official | 126:549ba18ddd81 | 253 | /* Set speed value for standard mode */ |
mbed_official | 126:549ba18ddd81 | 254 | tmpreg |= result; |
mbed_official | 126:549ba18ddd81 | 255 | /* Set Maximum Rise Time for standard mode */ |
mbed_official | 126:549ba18ddd81 | 256 | I2Cx->TRISE = freqrange + 1; |
mbed_official | 126:549ba18ddd81 | 257 | } |
mbed_official | 126:549ba18ddd81 | 258 | /* Configure speed in fast mode */ |
mbed_official | 126:549ba18ddd81 | 259 | else /*(I2C_InitStruct->I2C_ClockSpeed <= 400000)*/ |
mbed_official | 126:549ba18ddd81 | 260 | { |
mbed_official | 126:549ba18ddd81 | 261 | if (I2C_InitStruct->I2C_DutyCycle == I2C_DutyCycle_2) |
mbed_official | 126:549ba18ddd81 | 262 | { |
mbed_official | 126:549ba18ddd81 | 263 | /* Fast mode speed calculate: Tlow/Thigh = 2 */ |
mbed_official | 126:549ba18ddd81 | 264 | result = (uint16_t)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed * 3)); |
mbed_official | 126:549ba18ddd81 | 265 | } |
mbed_official | 126:549ba18ddd81 | 266 | else /*I2C_InitStruct->I2C_DutyCycle == I2C_DutyCycle_16_9*/ |
mbed_official | 126:549ba18ddd81 | 267 | { |
mbed_official | 126:549ba18ddd81 | 268 | /* Fast mode speed calculate: Tlow/Thigh = 16/9 */ |
mbed_official | 126:549ba18ddd81 | 269 | result = (uint16_t)(pclk1 / (I2C_InitStruct->I2C_ClockSpeed * 25)); |
mbed_official | 126:549ba18ddd81 | 270 | /* Set DUTY bit */ |
mbed_official | 126:549ba18ddd81 | 271 | result |= I2C_DutyCycle_16_9; |
mbed_official | 126:549ba18ddd81 | 272 | } |
mbed_official | 126:549ba18ddd81 | 273 | |
mbed_official | 126:549ba18ddd81 | 274 | /* Test if CCR value is under 0x1*/ |
mbed_official | 126:549ba18ddd81 | 275 | if ((result & CCR_CCR_Set) == 0) |
mbed_official | 126:549ba18ddd81 | 276 | { |
mbed_official | 126:549ba18ddd81 | 277 | /* Set minimum allowed value */ |
mbed_official | 126:549ba18ddd81 | 278 | result |= (uint16_t)0x0001; |
mbed_official | 126:549ba18ddd81 | 279 | } |
mbed_official | 126:549ba18ddd81 | 280 | /* Set speed value and set F/S bit for fast mode */ |
mbed_official | 126:549ba18ddd81 | 281 | tmpreg |= (uint16_t)(result | CCR_FS_Set); |
mbed_official | 126:549ba18ddd81 | 282 | /* Set Maximum Rise Time for fast mode */ |
mbed_official | 126:549ba18ddd81 | 283 | I2Cx->TRISE = (uint16_t)(((freqrange * (uint16_t)300) / (uint16_t)1000) + (uint16_t)1); |
mbed_official | 126:549ba18ddd81 | 284 | } |
mbed_official | 126:549ba18ddd81 | 285 | |
mbed_official | 126:549ba18ddd81 | 286 | /* Write to I2Cx CCR */ |
mbed_official | 126:549ba18ddd81 | 287 | I2Cx->CCR = tmpreg; |
mbed_official | 126:549ba18ddd81 | 288 | /* Enable the selected I2C peripheral */ |
mbed_official | 126:549ba18ddd81 | 289 | I2Cx->CR1 |= CR1_PE_Set; |
mbed_official | 126:549ba18ddd81 | 290 | |
mbed_official | 126:549ba18ddd81 | 291 | /*---------------------------- I2Cx CR1 Configuration ------------------------*/ |
mbed_official | 126:549ba18ddd81 | 292 | /* Get the I2Cx CR1 value */ |
mbed_official | 126:549ba18ddd81 | 293 | tmpreg = I2Cx->CR1; |
mbed_official | 126:549ba18ddd81 | 294 | /* Clear ACK, SMBTYPE and SMBUS bits */ |
mbed_official | 126:549ba18ddd81 | 295 | tmpreg &= CR1_CLEAR_Mask; |
mbed_official | 126:549ba18ddd81 | 296 | /* Configure I2Cx: mode and acknowledgement */ |
mbed_official | 126:549ba18ddd81 | 297 | /* Set SMBTYPE and SMBUS bits according to I2C_Mode value */ |
mbed_official | 126:549ba18ddd81 | 298 | /* Set ACK bit according to I2C_Ack value */ |
mbed_official | 126:549ba18ddd81 | 299 | tmpreg |= (uint16_t)((uint32_t)I2C_InitStruct->I2C_Mode | I2C_InitStruct->I2C_Ack); |
mbed_official | 126:549ba18ddd81 | 300 | /* Write to I2Cx CR1 */ |
mbed_official | 126:549ba18ddd81 | 301 | I2Cx->CR1 = tmpreg; |
mbed_official | 126:549ba18ddd81 | 302 | |
mbed_official | 126:549ba18ddd81 | 303 | /*---------------------------- I2Cx OAR1 Configuration -----------------------*/ |
mbed_official | 126:549ba18ddd81 | 304 | /* Set I2Cx Own Address1 and acknowledged address */ |
mbed_official | 126:549ba18ddd81 | 305 | I2Cx->OAR1 = (I2C_InitStruct->I2C_AcknowledgedAddress | I2C_InitStruct->I2C_OwnAddress1); |
mbed_official | 126:549ba18ddd81 | 306 | } |
mbed_official | 126:549ba18ddd81 | 307 | |
mbed_official | 126:549ba18ddd81 | 308 | /** |
mbed_official | 126:549ba18ddd81 | 309 | * @brief Fills each I2C_InitStruct member with its default value. |
mbed_official | 126:549ba18ddd81 | 310 | * @param I2C_InitStruct: pointer to an I2C_InitTypeDef structure which will be initialized. |
mbed_official | 126:549ba18ddd81 | 311 | * @retval None |
mbed_official | 126:549ba18ddd81 | 312 | */ |
mbed_official | 126:549ba18ddd81 | 313 | void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct) |
mbed_official | 126:549ba18ddd81 | 314 | { |
mbed_official | 126:549ba18ddd81 | 315 | /*---------------- Reset I2C init structure parameters values ----------------*/ |
mbed_official | 126:549ba18ddd81 | 316 | /* initialize the I2C_ClockSpeed member */ |
mbed_official | 126:549ba18ddd81 | 317 | I2C_InitStruct->I2C_ClockSpeed = 5000; |
mbed_official | 126:549ba18ddd81 | 318 | /* Initialize the I2C_Mode member */ |
mbed_official | 126:549ba18ddd81 | 319 | I2C_InitStruct->I2C_Mode = I2C_Mode_I2C; |
mbed_official | 126:549ba18ddd81 | 320 | /* Initialize the I2C_DutyCycle member */ |
mbed_official | 126:549ba18ddd81 | 321 | I2C_InitStruct->I2C_DutyCycle = I2C_DutyCycle_2; |
mbed_official | 126:549ba18ddd81 | 322 | /* Initialize the I2C_OwnAddress1 member */ |
mbed_official | 126:549ba18ddd81 | 323 | I2C_InitStruct->I2C_OwnAddress1 = 0; |
mbed_official | 126:549ba18ddd81 | 324 | /* Initialize the I2C_Ack member */ |
mbed_official | 126:549ba18ddd81 | 325 | I2C_InitStruct->I2C_Ack = I2C_Ack_Disable; |
mbed_official | 126:549ba18ddd81 | 326 | /* Initialize the I2C_AcknowledgedAddress member */ |
mbed_official | 126:549ba18ddd81 | 327 | I2C_InitStruct->I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; |
mbed_official | 126:549ba18ddd81 | 328 | } |
mbed_official | 126:549ba18ddd81 | 329 | |
mbed_official | 126:549ba18ddd81 | 330 | /** |
mbed_official | 126:549ba18ddd81 | 331 | * @brief Enables or disables the specified I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 332 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 333 | * @param NewState: new state of the I2Cx peripheral. |
mbed_official | 126:549ba18ddd81 | 334 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 335 | * @retval None |
mbed_official | 126:549ba18ddd81 | 336 | */ |
mbed_official | 126:549ba18ddd81 | 337 | void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 338 | { |
mbed_official | 126:549ba18ddd81 | 339 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 340 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 341 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 342 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 343 | { |
mbed_official | 126:549ba18ddd81 | 344 | /* Enable the selected I2C peripheral */ |
mbed_official | 126:549ba18ddd81 | 345 | I2Cx->CR1 |= CR1_PE_Set; |
mbed_official | 126:549ba18ddd81 | 346 | } |
mbed_official | 126:549ba18ddd81 | 347 | else |
mbed_official | 126:549ba18ddd81 | 348 | { |
mbed_official | 126:549ba18ddd81 | 349 | /* Disable the selected I2C peripheral */ |
mbed_official | 126:549ba18ddd81 | 350 | I2Cx->CR1 &= CR1_PE_Reset; |
mbed_official | 126:549ba18ddd81 | 351 | } |
mbed_official | 126:549ba18ddd81 | 352 | } |
mbed_official | 126:549ba18ddd81 | 353 | |
mbed_official | 126:549ba18ddd81 | 354 | /** |
mbed_official | 126:549ba18ddd81 | 355 | * @brief Enables or disables the specified I2C DMA requests. |
mbed_official | 126:549ba18ddd81 | 356 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 357 | * @param NewState: new state of the I2C DMA transfer. |
mbed_official | 126:549ba18ddd81 | 358 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 359 | * @retval None |
mbed_official | 126:549ba18ddd81 | 360 | */ |
mbed_official | 126:549ba18ddd81 | 361 | void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 362 | { |
mbed_official | 126:549ba18ddd81 | 363 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 364 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 365 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 366 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 367 | { |
mbed_official | 126:549ba18ddd81 | 368 | /* Enable the selected I2C DMA requests */ |
mbed_official | 126:549ba18ddd81 | 369 | I2Cx->CR2 |= CR2_DMAEN_Set; |
mbed_official | 126:549ba18ddd81 | 370 | } |
mbed_official | 126:549ba18ddd81 | 371 | else |
mbed_official | 126:549ba18ddd81 | 372 | { |
mbed_official | 126:549ba18ddd81 | 373 | /* Disable the selected I2C DMA requests */ |
mbed_official | 126:549ba18ddd81 | 374 | I2Cx->CR2 &= CR2_DMAEN_Reset; |
mbed_official | 126:549ba18ddd81 | 375 | } |
mbed_official | 126:549ba18ddd81 | 376 | } |
mbed_official | 126:549ba18ddd81 | 377 | |
mbed_official | 126:549ba18ddd81 | 378 | /** |
mbed_official | 126:549ba18ddd81 | 379 | * @brief Specifies if the next DMA transfer will be the last one. |
mbed_official | 126:549ba18ddd81 | 380 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 381 | * @param NewState: new state of the I2C DMA last transfer. |
mbed_official | 126:549ba18ddd81 | 382 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 383 | * @retval None |
mbed_official | 126:549ba18ddd81 | 384 | */ |
mbed_official | 126:549ba18ddd81 | 385 | void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 386 | { |
mbed_official | 126:549ba18ddd81 | 387 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 388 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 389 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 390 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 391 | { |
mbed_official | 126:549ba18ddd81 | 392 | /* Next DMA transfer is the last transfer */ |
mbed_official | 126:549ba18ddd81 | 393 | I2Cx->CR2 |= CR2_LAST_Set; |
mbed_official | 126:549ba18ddd81 | 394 | } |
mbed_official | 126:549ba18ddd81 | 395 | else |
mbed_official | 126:549ba18ddd81 | 396 | { |
mbed_official | 126:549ba18ddd81 | 397 | /* Next DMA transfer is not the last transfer */ |
mbed_official | 126:549ba18ddd81 | 398 | I2Cx->CR2 &= CR2_LAST_Reset; |
mbed_official | 126:549ba18ddd81 | 399 | } |
mbed_official | 126:549ba18ddd81 | 400 | } |
mbed_official | 126:549ba18ddd81 | 401 | |
mbed_official | 126:549ba18ddd81 | 402 | /** |
mbed_official | 126:549ba18ddd81 | 403 | * @brief Generates I2Cx communication START condition. |
mbed_official | 126:549ba18ddd81 | 404 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 405 | * @param NewState: new state of the I2C START condition generation. |
mbed_official | 126:549ba18ddd81 | 406 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 407 | * @retval None. |
mbed_official | 126:549ba18ddd81 | 408 | */ |
mbed_official | 126:549ba18ddd81 | 409 | void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 410 | { |
mbed_official | 126:549ba18ddd81 | 411 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 412 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 413 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 414 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 415 | { |
mbed_official | 126:549ba18ddd81 | 416 | /* Generate a START condition */ |
mbed_official | 126:549ba18ddd81 | 417 | I2Cx->CR1 |= CR1_START_Set; |
mbed_official | 126:549ba18ddd81 | 418 | } |
mbed_official | 126:549ba18ddd81 | 419 | else |
mbed_official | 126:549ba18ddd81 | 420 | { |
mbed_official | 126:549ba18ddd81 | 421 | /* Disable the START condition generation */ |
mbed_official | 126:549ba18ddd81 | 422 | I2Cx->CR1 &= CR1_START_Reset; |
mbed_official | 126:549ba18ddd81 | 423 | } |
mbed_official | 126:549ba18ddd81 | 424 | } |
mbed_official | 126:549ba18ddd81 | 425 | |
mbed_official | 126:549ba18ddd81 | 426 | /** |
mbed_official | 126:549ba18ddd81 | 427 | * @brief Generates I2Cx communication STOP condition. |
mbed_official | 126:549ba18ddd81 | 428 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 429 | * @param NewState: new state of the I2C STOP condition generation. |
mbed_official | 126:549ba18ddd81 | 430 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 431 | * @retval None. |
mbed_official | 126:549ba18ddd81 | 432 | */ |
mbed_official | 126:549ba18ddd81 | 433 | void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 434 | { |
mbed_official | 126:549ba18ddd81 | 435 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 436 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 437 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 438 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 439 | { |
mbed_official | 126:549ba18ddd81 | 440 | /* Generate a STOP condition */ |
mbed_official | 126:549ba18ddd81 | 441 | I2Cx->CR1 |= CR1_STOP_Set; |
mbed_official | 126:549ba18ddd81 | 442 | } |
mbed_official | 126:549ba18ddd81 | 443 | else |
mbed_official | 126:549ba18ddd81 | 444 | { |
mbed_official | 126:549ba18ddd81 | 445 | /* Disable the STOP condition generation */ |
mbed_official | 126:549ba18ddd81 | 446 | I2Cx->CR1 &= CR1_STOP_Reset; |
mbed_official | 126:549ba18ddd81 | 447 | } |
mbed_official | 126:549ba18ddd81 | 448 | } |
mbed_official | 126:549ba18ddd81 | 449 | |
mbed_official | 126:549ba18ddd81 | 450 | /** |
mbed_official | 126:549ba18ddd81 | 451 | * @brief Enables or disables the specified I2C acknowledge feature. |
mbed_official | 126:549ba18ddd81 | 452 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 453 | * @param NewState: new state of the I2C Acknowledgement. |
mbed_official | 126:549ba18ddd81 | 454 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 455 | * @retval None. |
mbed_official | 126:549ba18ddd81 | 456 | */ |
mbed_official | 126:549ba18ddd81 | 457 | void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 458 | { |
mbed_official | 126:549ba18ddd81 | 459 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 460 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 461 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 462 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 463 | { |
mbed_official | 126:549ba18ddd81 | 464 | /* Enable the acknowledgement */ |
mbed_official | 126:549ba18ddd81 | 465 | I2Cx->CR1 |= CR1_ACK_Set; |
mbed_official | 126:549ba18ddd81 | 466 | } |
mbed_official | 126:549ba18ddd81 | 467 | else |
mbed_official | 126:549ba18ddd81 | 468 | { |
mbed_official | 126:549ba18ddd81 | 469 | /* Disable the acknowledgement */ |
mbed_official | 126:549ba18ddd81 | 470 | I2Cx->CR1 &= CR1_ACK_Reset; |
mbed_official | 126:549ba18ddd81 | 471 | } |
mbed_official | 126:549ba18ddd81 | 472 | } |
mbed_official | 126:549ba18ddd81 | 473 | |
mbed_official | 126:549ba18ddd81 | 474 | /** |
mbed_official | 126:549ba18ddd81 | 475 | * @brief Configures the specified I2C own address2. |
mbed_official | 126:549ba18ddd81 | 476 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 477 | * @param Address: specifies the 7bit I2C own address2. |
mbed_official | 126:549ba18ddd81 | 478 | * @retval None. |
mbed_official | 126:549ba18ddd81 | 479 | */ |
mbed_official | 126:549ba18ddd81 | 480 | void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address) |
mbed_official | 126:549ba18ddd81 | 481 | { |
mbed_official | 126:549ba18ddd81 | 482 | uint16_t tmpreg = 0; |
mbed_official | 126:549ba18ddd81 | 483 | |
mbed_official | 126:549ba18ddd81 | 484 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 485 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 486 | |
mbed_official | 126:549ba18ddd81 | 487 | /* Get the old register value */ |
mbed_official | 126:549ba18ddd81 | 488 | tmpreg = I2Cx->OAR2; |
mbed_official | 126:549ba18ddd81 | 489 | |
mbed_official | 126:549ba18ddd81 | 490 | /* Reset I2Cx Own address2 bit [7:1] */ |
mbed_official | 126:549ba18ddd81 | 491 | tmpreg &= OAR2_ADD2_Reset; |
mbed_official | 126:549ba18ddd81 | 492 | |
mbed_official | 126:549ba18ddd81 | 493 | /* Set I2Cx Own address2 */ |
mbed_official | 126:549ba18ddd81 | 494 | tmpreg |= (uint16_t)((uint16_t)Address & (uint16_t)0x00FE); |
mbed_official | 126:549ba18ddd81 | 495 | |
mbed_official | 126:549ba18ddd81 | 496 | /* Store the new register value */ |
mbed_official | 126:549ba18ddd81 | 497 | I2Cx->OAR2 = tmpreg; |
mbed_official | 126:549ba18ddd81 | 498 | } |
mbed_official | 126:549ba18ddd81 | 499 | |
mbed_official | 126:549ba18ddd81 | 500 | /** |
mbed_official | 126:549ba18ddd81 | 501 | * @brief Enables or disables the specified I2C dual addressing mode. |
mbed_official | 126:549ba18ddd81 | 502 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 503 | * @param NewState: new state of the I2C dual addressing mode. |
mbed_official | 126:549ba18ddd81 | 504 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 505 | * @retval None |
mbed_official | 126:549ba18ddd81 | 506 | */ |
mbed_official | 126:549ba18ddd81 | 507 | void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 508 | { |
mbed_official | 126:549ba18ddd81 | 509 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 510 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 511 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 512 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 513 | { |
mbed_official | 126:549ba18ddd81 | 514 | /* Enable dual addressing mode */ |
mbed_official | 126:549ba18ddd81 | 515 | I2Cx->OAR2 |= OAR2_ENDUAL_Set; |
mbed_official | 126:549ba18ddd81 | 516 | } |
mbed_official | 126:549ba18ddd81 | 517 | else |
mbed_official | 126:549ba18ddd81 | 518 | { |
mbed_official | 126:549ba18ddd81 | 519 | /* Disable dual addressing mode */ |
mbed_official | 126:549ba18ddd81 | 520 | I2Cx->OAR2 &= OAR2_ENDUAL_Reset; |
mbed_official | 126:549ba18ddd81 | 521 | } |
mbed_official | 126:549ba18ddd81 | 522 | } |
mbed_official | 126:549ba18ddd81 | 523 | |
mbed_official | 126:549ba18ddd81 | 524 | /** |
mbed_official | 126:549ba18ddd81 | 525 | * @brief Enables or disables the specified I2C general call feature. |
mbed_official | 126:549ba18ddd81 | 526 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 527 | * @param NewState: new state of the I2C General call. |
mbed_official | 126:549ba18ddd81 | 528 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 529 | * @retval None |
mbed_official | 126:549ba18ddd81 | 530 | */ |
mbed_official | 126:549ba18ddd81 | 531 | void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 532 | { |
mbed_official | 126:549ba18ddd81 | 533 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 534 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 535 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 536 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 537 | { |
mbed_official | 126:549ba18ddd81 | 538 | /* Enable generall call */ |
mbed_official | 126:549ba18ddd81 | 539 | I2Cx->CR1 |= CR1_ENGC_Set; |
mbed_official | 126:549ba18ddd81 | 540 | } |
mbed_official | 126:549ba18ddd81 | 541 | else |
mbed_official | 126:549ba18ddd81 | 542 | { |
mbed_official | 126:549ba18ddd81 | 543 | /* Disable generall call */ |
mbed_official | 126:549ba18ddd81 | 544 | I2Cx->CR1 &= CR1_ENGC_Reset; |
mbed_official | 126:549ba18ddd81 | 545 | } |
mbed_official | 126:549ba18ddd81 | 546 | } |
mbed_official | 126:549ba18ddd81 | 547 | |
mbed_official | 126:549ba18ddd81 | 548 | /** |
mbed_official | 126:549ba18ddd81 | 549 | * @brief Enables or disables the specified I2C interrupts. |
mbed_official | 126:549ba18ddd81 | 550 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 551 | * @param I2C_IT: specifies the I2C interrupts sources to be enabled or disabled. |
mbed_official | 126:549ba18ddd81 | 552 | * This parameter can be any combination of the following values: |
mbed_official | 126:549ba18ddd81 | 553 | * @arg I2C_IT_BUF: Buffer interrupt mask |
mbed_official | 126:549ba18ddd81 | 554 | * @arg I2C_IT_EVT: Event interrupt mask |
mbed_official | 126:549ba18ddd81 | 555 | * @arg I2C_IT_ERR: Error interrupt mask |
mbed_official | 126:549ba18ddd81 | 556 | * @param NewState: new state of the specified I2C interrupts. |
mbed_official | 126:549ba18ddd81 | 557 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 558 | * @retval None |
mbed_official | 126:549ba18ddd81 | 559 | */ |
mbed_official | 126:549ba18ddd81 | 560 | void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t I2C_IT, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 561 | { |
mbed_official | 126:549ba18ddd81 | 562 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 563 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 564 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 565 | assert_param(IS_I2C_CONFIG_IT(I2C_IT)); |
mbed_official | 126:549ba18ddd81 | 566 | |
mbed_official | 126:549ba18ddd81 | 567 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 568 | { |
mbed_official | 126:549ba18ddd81 | 569 | /* Enable the selected I2C interrupts */ |
mbed_official | 126:549ba18ddd81 | 570 | I2Cx->CR2 |= I2C_IT; |
mbed_official | 126:549ba18ddd81 | 571 | } |
mbed_official | 126:549ba18ddd81 | 572 | else |
mbed_official | 126:549ba18ddd81 | 573 | { |
mbed_official | 126:549ba18ddd81 | 574 | /* Disable the selected I2C interrupts */ |
mbed_official | 126:549ba18ddd81 | 575 | I2Cx->CR2 &= (uint16_t)~I2C_IT; |
mbed_official | 126:549ba18ddd81 | 576 | } |
mbed_official | 126:549ba18ddd81 | 577 | } |
mbed_official | 126:549ba18ddd81 | 578 | |
mbed_official | 126:549ba18ddd81 | 579 | /** |
mbed_official | 126:549ba18ddd81 | 580 | * @brief Sends a data byte through the I2Cx peripheral. |
mbed_official | 126:549ba18ddd81 | 581 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 582 | * @param Data: Byte to be transmitted.. |
mbed_official | 126:549ba18ddd81 | 583 | * @retval None |
mbed_official | 126:549ba18ddd81 | 584 | */ |
mbed_official | 126:549ba18ddd81 | 585 | void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data) |
mbed_official | 126:549ba18ddd81 | 586 | { |
mbed_official | 126:549ba18ddd81 | 587 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 588 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 589 | /* Write in the DR register the data to be sent */ |
mbed_official | 126:549ba18ddd81 | 590 | I2Cx->DR = Data; |
mbed_official | 126:549ba18ddd81 | 591 | } |
mbed_official | 126:549ba18ddd81 | 592 | |
mbed_official | 126:549ba18ddd81 | 593 | /** |
mbed_official | 126:549ba18ddd81 | 594 | * @brief Returns the most recent received data by the I2Cx peripheral. |
mbed_official | 126:549ba18ddd81 | 595 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 596 | * @retval The value of the received data. |
mbed_official | 126:549ba18ddd81 | 597 | */ |
mbed_official | 126:549ba18ddd81 | 598 | uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx) |
mbed_official | 126:549ba18ddd81 | 599 | { |
mbed_official | 126:549ba18ddd81 | 600 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 601 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 602 | /* Return the data in the DR register */ |
mbed_official | 126:549ba18ddd81 | 603 | return (uint8_t)I2Cx->DR; |
mbed_official | 126:549ba18ddd81 | 604 | } |
mbed_official | 126:549ba18ddd81 | 605 | |
mbed_official | 126:549ba18ddd81 | 606 | /** |
mbed_official | 126:549ba18ddd81 | 607 | * @brief Transmits the address byte to select the slave device. |
mbed_official | 126:549ba18ddd81 | 608 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 609 | * @param Address: specifies the slave address which will be transmitted |
mbed_official | 126:549ba18ddd81 | 610 | * @param I2C_Direction: specifies whether the I2C device will be a |
mbed_official | 126:549ba18ddd81 | 611 | * Transmitter or a Receiver. This parameter can be one of the following values |
mbed_official | 126:549ba18ddd81 | 612 | * @arg I2C_Direction_Transmitter: Transmitter mode |
mbed_official | 126:549ba18ddd81 | 613 | * @arg I2C_Direction_Receiver: Receiver mode |
mbed_official | 126:549ba18ddd81 | 614 | * @retval None. |
mbed_official | 126:549ba18ddd81 | 615 | */ |
mbed_official | 126:549ba18ddd81 | 616 | void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction) |
mbed_official | 126:549ba18ddd81 | 617 | { |
mbed_official | 126:549ba18ddd81 | 618 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 619 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 620 | assert_param(IS_I2C_DIRECTION(I2C_Direction)); |
mbed_official | 126:549ba18ddd81 | 621 | /* Test on the direction to set/reset the read/write bit */ |
mbed_official | 126:549ba18ddd81 | 622 | if (I2C_Direction != I2C_Direction_Transmitter) |
mbed_official | 126:549ba18ddd81 | 623 | { |
mbed_official | 126:549ba18ddd81 | 624 | /* Set the address bit0 for read */ |
mbed_official | 126:549ba18ddd81 | 625 | Address |= OAR1_ADD0_Set; |
mbed_official | 126:549ba18ddd81 | 626 | } |
mbed_official | 126:549ba18ddd81 | 627 | else |
mbed_official | 126:549ba18ddd81 | 628 | { |
mbed_official | 126:549ba18ddd81 | 629 | /* Reset the address bit0 for write */ |
mbed_official | 126:549ba18ddd81 | 630 | Address &= OAR1_ADD0_Reset; |
mbed_official | 126:549ba18ddd81 | 631 | } |
mbed_official | 126:549ba18ddd81 | 632 | /* Send the address */ |
mbed_official | 126:549ba18ddd81 | 633 | I2Cx->DR = Address; |
mbed_official | 126:549ba18ddd81 | 634 | } |
mbed_official | 126:549ba18ddd81 | 635 | |
mbed_official | 126:549ba18ddd81 | 636 | /** |
mbed_official | 126:549ba18ddd81 | 637 | * @brief Reads the specified I2C register and returns its value. |
mbed_official | 126:549ba18ddd81 | 638 | * @param I2C_Register: specifies the register to read. |
mbed_official | 126:549ba18ddd81 | 639 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 640 | * @arg I2C_Register_CR1: CR1 register. |
mbed_official | 126:549ba18ddd81 | 641 | * @arg I2C_Register_CR2: CR2 register. |
mbed_official | 126:549ba18ddd81 | 642 | * @arg I2C_Register_OAR1: OAR1 register. |
mbed_official | 126:549ba18ddd81 | 643 | * @arg I2C_Register_OAR2: OAR2 register. |
mbed_official | 126:549ba18ddd81 | 644 | * @arg I2C_Register_DR: DR register. |
mbed_official | 126:549ba18ddd81 | 645 | * @arg I2C_Register_SR1: SR1 register. |
mbed_official | 126:549ba18ddd81 | 646 | * @arg I2C_Register_SR2: SR2 register. |
mbed_official | 126:549ba18ddd81 | 647 | * @arg I2C_Register_CCR: CCR register. |
mbed_official | 126:549ba18ddd81 | 648 | * @arg I2C_Register_TRISE: TRISE register. |
mbed_official | 126:549ba18ddd81 | 649 | * @retval The value of the read register. |
mbed_official | 126:549ba18ddd81 | 650 | */ |
mbed_official | 126:549ba18ddd81 | 651 | uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register) |
mbed_official | 126:549ba18ddd81 | 652 | { |
mbed_official | 126:549ba18ddd81 | 653 | __IO uint32_t tmp = 0; |
mbed_official | 126:549ba18ddd81 | 654 | |
mbed_official | 126:549ba18ddd81 | 655 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 656 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 657 | assert_param(IS_I2C_REGISTER(I2C_Register)); |
mbed_official | 126:549ba18ddd81 | 658 | |
mbed_official | 126:549ba18ddd81 | 659 | tmp = (uint32_t) I2Cx; |
mbed_official | 126:549ba18ddd81 | 660 | tmp += I2C_Register; |
mbed_official | 126:549ba18ddd81 | 661 | |
mbed_official | 126:549ba18ddd81 | 662 | /* Return the selected register value */ |
mbed_official | 126:549ba18ddd81 | 663 | return (*(__IO uint16_t *) tmp); |
mbed_official | 126:549ba18ddd81 | 664 | } |
mbed_official | 126:549ba18ddd81 | 665 | |
mbed_official | 126:549ba18ddd81 | 666 | /** |
mbed_official | 126:549ba18ddd81 | 667 | * @brief Enables or disables the specified I2C software reset. |
mbed_official | 126:549ba18ddd81 | 668 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 669 | * @param NewState: new state of the I2C software reset. |
mbed_official | 126:549ba18ddd81 | 670 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 671 | * @retval None |
mbed_official | 126:549ba18ddd81 | 672 | */ |
mbed_official | 126:549ba18ddd81 | 673 | void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 674 | { |
mbed_official | 126:549ba18ddd81 | 675 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 676 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 677 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 678 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 679 | { |
mbed_official | 126:549ba18ddd81 | 680 | /* Peripheral under reset */ |
mbed_official | 126:549ba18ddd81 | 681 | I2Cx->CR1 |= CR1_SWRST_Set; |
mbed_official | 126:549ba18ddd81 | 682 | } |
mbed_official | 126:549ba18ddd81 | 683 | else |
mbed_official | 126:549ba18ddd81 | 684 | { |
mbed_official | 126:549ba18ddd81 | 685 | /* Peripheral not under reset */ |
mbed_official | 126:549ba18ddd81 | 686 | I2Cx->CR1 &= CR1_SWRST_Reset; |
mbed_official | 126:549ba18ddd81 | 687 | } |
mbed_official | 126:549ba18ddd81 | 688 | } |
mbed_official | 126:549ba18ddd81 | 689 | |
mbed_official | 126:549ba18ddd81 | 690 | /** |
mbed_official | 126:549ba18ddd81 | 691 | * @brief Selects the specified I2C NACK position in master receiver mode. |
mbed_official | 126:549ba18ddd81 | 692 | * This function is useful in I2C Master Receiver mode when the number |
mbed_official | 126:549ba18ddd81 | 693 | * of data to be received is equal to 2. In this case, this function |
mbed_official | 126:549ba18ddd81 | 694 | * should be called (with parameter I2C_NACKPosition_Next) before data |
mbed_official | 126:549ba18ddd81 | 695 | * reception starts,as described in the 2-byte reception procedure |
mbed_official | 126:549ba18ddd81 | 696 | * recommended in Reference Manual in Section: Master receiver. |
mbed_official | 126:549ba18ddd81 | 697 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 698 | * @param I2C_NACKPosition: specifies the NACK position. |
mbed_official | 126:549ba18ddd81 | 699 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 700 | * @arg I2C_NACKPosition_Next: indicates that the next byte will be the last |
mbed_official | 126:549ba18ddd81 | 701 | * received byte. |
mbed_official | 126:549ba18ddd81 | 702 | * @arg I2C_NACKPosition_Current: indicates that current byte is the last |
mbed_official | 126:549ba18ddd81 | 703 | * received byte. |
mbed_official | 126:549ba18ddd81 | 704 | * |
mbed_official | 126:549ba18ddd81 | 705 | * @note This function configures the same bit (POS) as I2C_PECPositionConfig() |
mbed_official | 126:549ba18ddd81 | 706 | * but is intended to be used in I2C mode while I2C_PECPositionConfig() |
mbed_official | 126:549ba18ddd81 | 707 | * is intended to used in SMBUS mode. |
mbed_official | 126:549ba18ddd81 | 708 | * |
mbed_official | 126:549ba18ddd81 | 709 | * @retval None |
mbed_official | 126:549ba18ddd81 | 710 | */ |
mbed_official | 126:549ba18ddd81 | 711 | void I2C_NACKPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_NACKPosition) |
mbed_official | 126:549ba18ddd81 | 712 | { |
mbed_official | 126:549ba18ddd81 | 713 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 714 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 715 | assert_param(IS_I2C_NACK_POSITION(I2C_NACKPosition)); |
mbed_official | 126:549ba18ddd81 | 716 | |
mbed_official | 126:549ba18ddd81 | 717 | /* Check the input parameter */ |
mbed_official | 126:549ba18ddd81 | 718 | if (I2C_NACKPosition == I2C_NACKPosition_Next) |
mbed_official | 126:549ba18ddd81 | 719 | { |
mbed_official | 126:549ba18ddd81 | 720 | /* Next byte in shift register is the last received byte */ |
mbed_official | 126:549ba18ddd81 | 721 | I2Cx->CR1 |= I2C_NACKPosition_Next; |
mbed_official | 126:549ba18ddd81 | 722 | } |
mbed_official | 126:549ba18ddd81 | 723 | else |
mbed_official | 126:549ba18ddd81 | 724 | { |
mbed_official | 126:549ba18ddd81 | 725 | /* Current byte in shift register is the last received byte */ |
mbed_official | 126:549ba18ddd81 | 726 | I2Cx->CR1 &= I2C_NACKPosition_Current; |
mbed_official | 126:549ba18ddd81 | 727 | } |
mbed_official | 126:549ba18ddd81 | 728 | } |
mbed_official | 126:549ba18ddd81 | 729 | |
mbed_official | 126:549ba18ddd81 | 730 | /** |
mbed_official | 126:549ba18ddd81 | 731 | * @brief Drives the SMBusAlert pin high or low for the specified I2C. |
mbed_official | 126:549ba18ddd81 | 732 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 733 | * @param I2C_SMBusAlert: specifies SMBAlert pin level. |
mbed_official | 126:549ba18ddd81 | 734 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 735 | * @arg I2C_SMBusAlert_Low: SMBAlert pin driven low |
mbed_official | 126:549ba18ddd81 | 736 | * @arg I2C_SMBusAlert_High: SMBAlert pin driven high |
mbed_official | 126:549ba18ddd81 | 737 | * @retval None |
mbed_official | 126:549ba18ddd81 | 738 | */ |
mbed_official | 126:549ba18ddd81 | 739 | void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, uint16_t I2C_SMBusAlert) |
mbed_official | 126:549ba18ddd81 | 740 | { |
mbed_official | 126:549ba18ddd81 | 741 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 742 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 743 | assert_param(IS_I2C_SMBUS_ALERT(I2C_SMBusAlert)); |
mbed_official | 126:549ba18ddd81 | 744 | if (I2C_SMBusAlert == I2C_SMBusAlert_Low) |
mbed_official | 126:549ba18ddd81 | 745 | { |
mbed_official | 126:549ba18ddd81 | 746 | /* Drive the SMBusAlert pin Low */ |
mbed_official | 126:549ba18ddd81 | 747 | I2Cx->CR1 |= I2C_SMBusAlert_Low; |
mbed_official | 126:549ba18ddd81 | 748 | } |
mbed_official | 126:549ba18ddd81 | 749 | else |
mbed_official | 126:549ba18ddd81 | 750 | { |
mbed_official | 126:549ba18ddd81 | 751 | /* Drive the SMBusAlert pin High */ |
mbed_official | 126:549ba18ddd81 | 752 | I2Cx->CR1 &= I2C_SMBusAlert_High; |
mbed_official | 126:549ba18ddd81 | 753 | } |
mbed_official | 126:549ba18ddd81 | 754 | } |
mbed_official | 126:549ba18ddd81 | 755 | |
mbed_official | 126:549ba18ddd81 | 756 | /** |
mbed_official | 126:549ba18ddd81 | 757 | * @brief Enables or disables the specified I2C PEC transfer. |
mbed_official | 126:549ba18ddd81 | 758 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 759 | * @param NewState: new state of the I2C PEC transmission. |
mbed_official | 126:549ba18ddd81 | 760 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 761 | * @retval None |
mbed_official | 126:549ba18ddd81 | 762 | */ |
mbed_official | 126:549ba18ddd81 | 763 | void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 764 | { |
mbed_official | 126:549ba18ddd81 | 765 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 766 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 767 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 768 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 769 | { |
mbed_official | 126:549ba18ddd81 | 770 | /* Enable the selected I2C PEC transmission */ |
mbed_official | 126:549ba18ddd81 | 771 | I2Cx->CR1 |= CR1_PEC_Set; |
mbed_official | 126:549ba18ddd81 | 772 | } |
mbed_official | 126:549ba18ddd81 | 773 | else |
mbed_official | 126:549ba18ddd81 | 774 | { |
mbed_official | 126:549ba18ddd81 | 775 | /* Disable the selected I2C PEC transmission */ |
mbed_official | 126:549ba18ddd81 | 776 | I2Cx->CR1 &= CR1_PEC_Reset; |
mbed_official | 126:549ba18ddd81 | 777 | } |
mbed_official | 126:549ba18ddd81 | 778 | } |
mbed_official | 126:549ba18ddd81 | 779 | |
mbed_official | 126:549ba18ddd81 | 780 | /** |
mbed_official | 126:549ba18ddd81 | 781 | * @brief Selects the specified I2C PEC position. |
mbed_official | 126:549ba18ddd81 | 782 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 783 | * @param I2C_PECPosition: specifies the PEC position. |
mbed_official | 126:549ba18ddd81 | 784 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 785 | * @arg I2C_PECPosition_Next: indicates that the next byte is PEC |
mbed_official | 126:549ba18ddd81 | 786 | * @arg I2C_PECPosition_Current: indicates that current byte is PEC |
mbed_official | 126:549ba18ddd81 | 787 | * |
mbed_official | 126:549ba18ddd81 | 788 | * @note This function configures the same bit (POS) as I2C_NACKPositionConfig() |
mbed_official | 126:549ba18ddd81 | 789 | * but is intended to be used in SMBUS mode while I2C_NACKPositionConfig() |
mbed_official | 126:549ba18ddd81 | 790 | * is intended to used in I2C mode. |
mbed_official | 126:549ba18ddd81 | 791 | * |
mbed_official | 126:549ba18ddd81 | 792 | * @retval None |
mbed_official | 126:549ba18ddd81 | 793 | */ |
mbed_official | 126:549ba18ddd81 | 794 | void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_PECPosition) |
mbed_official | 126:549ba18ddd81 | 795 | { |
mbed_official | 126:549ba18ddd81 | 796 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 797 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 798 | assert_param(IS_I2C_PEC_POSITION(I2C_PECPosition)); |
mbed_official | 126:549ba18ddd81 | 799 | if (I2C_PECPosition == I2C_PECPosition_Next) |
mbed_official | 126:549ba18ddd81 | 800 | { |
mbed_official | 126:549ba18ddd81 | 801 | /* Next byte in shift register is PEC */ |
mbed_official | 126:549ba18ddd81 | 802 | I2Cx->CR1 |= I2C_PECPosition_Next; |
mbed_official | 126:549ba18ddd81 | 803 | } |
mbed_official | 126:549ba18ddd81 | 804 | else |
mbed_official | 126:549ba18ddd81 | 805 | { |
mbed_official | 126:549ba18ddd81 | 806 | /* Current byte in shift register is PEC */ |
mbed_official | 126:549ba18ddd81 | 807 | I2Cx->CR1 &= I2C_PECPosition_Current; |
mbed_official | 126:549ba18ddd81 | 808 | } |
mbed_official | 126:549ba18ddd81 | 809 | } |
mbed_official | 126:549ba18ddd81 | 810 | |
mbed_official | 126:549ba18ddd81 | 811 | /** |
mbed_official | 126:549ba18ddd81 | 812 | * @brief Enables or disables the PEC value calculation of the transferred bytes. |
mbed_official | 126:549ba18ddd81 | 813 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 814 | * @param NewState: new state of the I2Cx PEC value calculation. |
mbed_official | 126:549ba18ddd81 | 815 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 816 | * @retval None |
mbed_official | 126:549ba18ddd81 | 817 | */ |
mbed_official | 126:549ba18ddd81 | 818 | void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 819 | { |
mbed_official | 126:549ba18ddd81 | 820 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 821 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 822 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 823 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 824 | { |
mbed_official | 126:549ba18ddd81 | 825 | /* Enable the selected I2C PEC calculation */ |
mbed_official | 126:549ba18ddd81 | 826 | I2Cx->CR1 |= CR1_ENPEC_Set; |
mbed_official | 126:549ba18ddd81 | 827 | } |
mbed_official | 126:549ba18ddd81 | 828 | else |
mbed_official | 126:549ba18ddd81 | 829 | { |
mbed_official | 126:549ba18ddd81 | 830 | /* Disable the selected I2C PEC calculation */ |
mbed_official | 126:549ba18ddd81 | 831 | I2Cx->CR1 &= CR1_ENPEC_Reset; |
mbed_official | 126:549ba18ddd81 | 832 | } |
mbed_official | 126:549ba18ddd81 | 833 | } |
mbed_official | 126:549ba18ddd81 | 834 | |
mbed_official | 126:549ba18ddd81 | 835 | /** |
mbed_official | 126:549ba18ddd81 | 836 | * @brief Returns the PEC value for the specified I2C. |
mbed_official | 126:549ba18ddd81 | 837 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 838 | * @retval The PEC value. |
mbed_official | 126:549ba18ddd81 | 839 | */ |
mbed_official | 126:549ba18ddd81 | 840 | uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx) |
mbed_official | 126:549ba18ddd81 | 841 | { |
mbed_official | 126:549ba18ddd81 | 842 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 843 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 844 | /* Return the selected I2C PEC value */ |
mbed_official | 126:549ba18ddd81 | 845 | return ((I2Cx->SR2) >> 8); |
mbed_official | 126:549ba18ddd81 | 846 | } |
mbed_official | 126:549ba18ddd81 | 847 | |
mbed_official | 126:549ba18ddd81 | 848 | /** |
mbed_official | 126:549ba18ddd81 | 849 | * @brief Enables or disables the specified I2C ARP. |
mbed_official | 126:549ba18ddd81 | 850 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 851 | * @param NewState: new state of the I2Cx ARP. |
mbed_official | 126:549ba18ddd81 | 852 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 853 | * @retval None |
mbed_official | 126:549ba18ddd81 | 854 | */ |
mbed_official | 126:549ba18ddd81 | 855 | void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 856 | { |
mbed_official | 126:549ba18ddd81 | 857 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 858 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 859 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 860 | if (NewState != DISABLE) |
mbed_official | 126:549ba18ddd81 | 861 | { |
mbed_official | 126:549ba18ddd81 | 862 | /* Enable the selected I2C ARP */ |
mbed_official | 126:549ba18ddd81 | 863 | I2Cx->CR1 |= CR1_ENARP_Set; |
mbed_official | 126:549ba18ddd81 | 864 | } |
mbed_official | 126:549ba18ddd81 | 865 | else |
mbed_official | 126:549ba18ddd81 | 866 | { |
mbed_official | 126:549ba18ddd81 | 867 | /* Disable the selected I2C ARP */ |
mbed_official | 126:549ba18ddd81 | 868 | I2Cx->CR1 &= CR1_ENARP_Reset; |
mbed_official | 126:549ba18ddd81 | 869 | } |
mbed_official | 126:549ba18ddd81 | 870 | } |
mbed_official | 126:549ba18ddd81 | 871 | |
mbed_official | 126:549ba18ddd81 | 872 | /** |
mbed_official | 126:549ba18ddd81 | 873 | * @brief Enables or disables the specified I2C Clock stretching. |
mbed_official | 126:549ba18ddd81 | 874 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 875 | * @param NewState: new state of the I2Cx Clock stretching. |
mbed_official | 126:549ba18ddd81 | 876 | * This parameter can be: ENABLE or DISABLE. |
mbed_official | 126:549ba18ddd81 | 877 | * @retval None |
mbed_official | 126:549ba18ddd81 | 878 | */ |
mbed_official | 126:549ba18ddd81 | 879 | void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState) |
mbed_official | 126:549ba18ddd81 | 880 | { |
mbed_official | 126:549ba18ddd81 | 881 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 882 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 883 | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
mbed_official | 126:549ba18ddd81 | 884 | if (NewState == DISABLE) |
mbed_official | 126:549ba18ddd81 | 885 | { |
mbed_official | 126:549ba18ddd81 | 886 | /* Enable the selected I2C Clock stretching */ |
mbed_official | 126:549ba18ddd81 | 887 | I2Cx->CR1 |= CR1_NOSTRETCH_Set; |
mbed_official | 126:549ba18ddd81 | 888 | } |
mbed_official | 126:549ba18ddd81 | 889 | else |
mbed_official | 126:549ba18ddd81 | 890 | { |
mbed_official | 126:549ba18ddd81 | 891 | /* Disable the selected I2C Clock stretching */ |
mbed_official | 126:549ba18ddd81 | 892 | I2Cx->CR1 &= CR1_NOSTRETCH_Reset; |
mbed_official | 126:549ba18ddd81 | 893 | } |
mbed_official | 126:549ba18ddd81 | 894 | } |
mbed_official | 126:549ba18ddd81 | 895 | |
mbed_official | 126:549ba18ddd81 | 896 | /** |
mbed_official | 126:549ba18ddd81 | 897 | * @brief Selects the specified I2C fast mode duty cycle. |
mbed_official | 126:549ba18ddd81 | 898 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 899 | * @param I2C_DutyCycle: specifies the fast mode duty cycle. |
mbed_official | 126:549ba18ddd81 | 900 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 901 | * @arg I2C_DutyCycle_2: I2C fast mode Tlow/Thigh = 2 |
mbed_official | 126:549ba18ddd81 | 902 | * @arg I2C_DutyCycle_16_9: I2C fast mode Tlow/Thigh = 16/9 |
mbed_official | 126:549ba18ddd81 | 903 | * @retval None |
mbed_official | 126:549ba18ddd81 | 904 | */ |
mbed_official | 126:549ba18ddd81 | 905 | void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, uint16_t I2C_DutyCycle) |
mbed_official | 126:549ba18ddd81 | 906 | { |
mbed_official | 126:549ba18ddd81 | 907 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 908 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 909 | assert_param(IS_I2C_DUTY_CYCLE(I2C_DutyCycle)); |
mbed_official | 126:549ba18ddd81 | 910 | if (I2C_DutyCycle != I2C_DutyCycle_16_9) |
mbed_official | 126:549ba18ddd81 | 911 | { |
mbed_official | 126:549ba18ddd81 | 912 | /* I2C fast mode Tlow/Thigh=2 */ |
mbed_official | 126:549ba18ddd81 | 913 | I2Cx->CCR &= I2C_DutyCycle_2; |
mbed_official | 126:549ba18ddd81 | 914 | } |
mbed_official | 126:549ba18ddd81 | 915 | else |
mbed_official | 126:549ba18ddd81 | 916 | { |
mbed_official | 126:549ba18ddd81 | 917 | /* I2C fast mode Tlow/Thigh=16/9 */ |
mbed_official | 126:549ba18ddd81 | 918 | I2Cx->CCR |= I2C_DutyCycle_16_9; |
mbed_official | 126:549ba18ddd81 | 919 | } |
mbed_official | 126:549ba18ddd81 | 920 | } |
mbed_official | 126:549ba18ddd81 | 921 | |
mbed_official | 126:549ba18ddd81 | 922 | |
mbed_official | 126:549ba18ddd81 | 923 | |
mbed_official | 126:549ba18ddd81 | 924 | /** |
mbed_official | 126:549ba18ddd81 | 925 | * @brief |
mbed_official | 126:549ba18ddd81 | 926 | **************************************************************************************** |
mbed_official | 126:549ba18ddd81 | 927 | * |
mbed_official | 126:549ba18ddd81 | 928 | * I2C State Monitoring Functions |
mbed_official | 126:549ba18ddd81 | 929 | * |
mbed_official | 126:549ba18ddd81 | 930 | **************************************************************************************** |
mbed_official | 126:549ba18ddd81 | 931 | * This I2C driver provides three different ways for I2C state monitoring |
mbed_official | 126:549ba18ddd81 | 932 | * depending on the application requirements and constraints: |
mbed_official | 126:549ba18ddd81 | 933 | * |
mbed_official | 126:549ba18ddd81 | 934 | * |
mbed_official | 126:549ba18ddd81 | 935 | * 1) Basic state monitoring: |
mbed_official | 126:549ba18ddd81 | 936 | * Using I2C_CheckEvent() function: |
mbed_official | 126:549ba18ddd81 | 937 | * It compares the status registers (SR1 and SR2) content to a given event |
mbed_official | 126:549ba18ddd81 | 938 | * (can be the combination of one or more flags). |
mbed_official | 126:549ba18ddd81 | 939 | * It returns SUCCESS if the current status includes the given flags |
mbed_official | 126:549ba18ddd81 | 940 | * and returns ERROR if one or more flags are missing in the current status. |
mbed_official | 126:549ba18ddd81 | 941 | * - When to use: |
mbed_official | 126:549ba18ddd81 | 942 | * - This function is suitable for most applications as well as for startup |
mbed_official | 126:549ba18ddd81 | 943 | * activity since the events are fully described in the product reference manual |
mbed_official | 126:549ba18ddd81 | 944 | * (RM0008). |
mbed_official | 126:549ba18ddd81 | 945 | * - It is also suitable for users who need to define their own events. |
mbed_official | 126:549ba18ddd81 | 946 | * - Limitations: |
mbed_official | 126:549ba18ddd81 | 947 | * - If an error occurs (ie. error flags are set besides to the monitored flags), |
mbed_official | 126:549ba18ddd81 | 948 | * the I2C_CheckEvent() function may return SUCCESS despite the communication |
mbed_official | 126:549ba18ddd81 | 949 | * hold or corrupted real state. |
mbed_official | 126:549ba18ddd81 | 950 | * In this case, it is advised to use error interrupts to monitor the error |
mbed_official | 126:549ba18ddd81 | 951 | * events and handle them in the interrupt IRQ handler. |
mbed_official | 126:549ba18ddd81 | 952 | * |
mbed_official | 126:549ba18ddd81 | 953 | * @note |
mbed_official | 126:549ba18ddd81 | 954 | * For error management, it is advised to use the following functions: |
mbed_official | 126:549ba18ddd81 | 955 | * - I2C_ITConfig() to configure and enable the error interrupts (I2C_IT_ERR). |
mbed_official | 126:549ba18ddd81 | 956 | * - I2Cx_ER_IRQHandler() which is called when the error interrupt occurs. |
mbed_official | 126:549ba18ddd81 | 957 | * Where x is the peripheral instance (I2C1, I2C2 ...) |
mbed_official | 126:549ba18ddd81 | 958 | * - I2C_GetFlagStatus() or I2C_GetITStatus() to be called into I2Cx_ER_IRQHandler() |
mbed_official | 126:549ba18ddd81 | 959 | * in order to determine which error occured. |
mbed_official | 126:549ba18ddd81 | 960 | * - I2C_ClearFlag() or I2C_ClearITPendingBit() and/or I2C_SoftwareResetCmd() |
mbed_official | 126:549ba18ddd81 | 961 | * and/or I2C_GenerateStop() in order to clear the error flag and source, |
mbed_official | 126:549ba18ddd81 | 962 | * and return to correct communication status. |
mbed_official | 126:549ba18ddd81 | 963 | * |
mbed_official | 126:549ba18ddd81 | 964 | * |
mbed_official | 126:549ba18ddd81 | 965 | * 2) Advanced state monitoring: |
mbed_official | 126:549ba18ddd81 | 966 | * Using the function I2C_GetLastEvent() which returns the image of both status |
mbed_official | 126:549ba18ddd81 | 967 | * registers in a single word (uint32_t) (Status Register 2 value is shifted left |
mbed_official | 126:549ba18ddd81 | 968 | * by 16 bits and concatenated to Status Register 1). |
mbed_official | 126:549ba18ddd81 | 969 | * - When to use: |
mbed_official | 126:549ba18ddd81 | 970 | * - This function is suitable for the same applications above but it allows to |
mbed_official | 126:549ba18ddd81 | 971 | * overcome the mentioned limitation of I2C_GetFlagStatus() function. |
mbed_official | 126:549ba18ddd81 | 972 | * The returned value could be compared to events already defined in the |
mbed_official | 126:549ba18ddd81 | 973 | * library (stm32f10x_i2c.h) or to custom values defined by user. |
mbed_official | 126:549ba18ddd81 | 974 | * - This function is suitable when multiple flags are monitored at the same time. |
mbed_official | 126:549ba18ddd81 | 975 | * - At the opposite of I2C_CheckEvent() function, this function allows user to |
mbed_official | 126:549ba18ddd81 | 976 | * choose when an event is accepted (when all events flags are set and no |
mbed_official | 126:549ba18ddd81 | 977 | * other flags are set or just when the needed flags are set like |
mbed_official | 126:549ba18ddd81 | 978 | * I2C_CheckEvent() function). |
mbed_official | 126:549ba18ddd81 | 979 | * - Limitations: |
mbed_official | 126:549ba18ddd81 | 980 | * - User may need to define his own events. |
mbed_official | 126:549ba18ddd81 | 981 | * - Same remark concerning the error management is applicable for this |
mbed_official | 126:549ba18ddd81 | 982 | * function if user decides to check only regular communication flags (and |
mbed_official | 126:549ba18ddd81 | 983 | * ignores error flags). |
mbed_official | 126:549ba18ddd81 | 984 | * |
mbed_official | 126:549ba18ddd81 | 985 | * |
mbed_official | 126:549ba18ddd81 | 986 | * 3) Flag-based state monitoring: |
mbed_official | 126:549ba18ddd81 | 987 | * Using the function I2C_GetFlagStatus() which simply returns the status of |
mbed_official | 126:549ba18ddd81 | 988 | * one single flag (ie. I2C_FLAG_RXNE ...). |
mbed_official | 126:549ba18ddd81 | 989 | * - When to use: |
mbed_official | 126:549ba18ddd81 | 990 | * - This function could be used for specific applications or in debug phase. |
mbed_official | 126:549ba18ddd81 | 991 | * - It is suitable when only one flag checking is needed (most I2C events |
mbed_official | 126:549ba18ddd81 | 992 | * are monitored through multiple flags). |
mbed_official | 126:549ba18ddd81 | 993 | * - Limitations: |
mbed_official | 126:549ba18ddd81 | 994 | * - When calling this function, the Status register is accessed. Some flags are |
mbed_official | 126:549ba18ddd81 | 995 | * cleared when the status register is accessed. So checking the status |
mbed_official | 126:549ba18ddd81 | 996 | * of one Flag, may clear other ones. |
mbed_official | 126:549ba18ddd81 | 997 | * - Function may need to be called twice or more in order to monitor one |
mbed_official | 126:549ba18ddd81 | 998 | * single event. |
mbed_official | 126:549ba18ddd81 | 999 | * |
mbed_official | 126:549ba18ddd81 | 1000 | * For detailed description of Events, please refer to section I2C_Events in |
mbed_official | 126:549ba18ddd81 | 1001 | * stm32f10x_i2c.h file. |
mbed_official | 126:549ba18ddd81 | 1002 | * |
mbed_official | 126:549ba18ddd81 | 1003 | */ |
mbed_official | 126:549ba18ddd81 | 1004 | |
mbed_official | 126:549ba18ddd81 | 1005 | /** |
mbed_official | 126:549ba18ddd81 | 1006 | * |
mbed_official | 126:549ba18ddd81 | 1007 | * 1) Basic state monitoring |
mbed_official | 126:549ba18ddd81 | 1008 | ******************************************************************************* |
mbed_official | 126:549ba18ddd81 | 1009 | */ |
mbed_official | 126:549ba18ddd81 | 1010 | |
mbed_official | 126:549ba18ddd81 | 1011 | /** |
mbed_official | 126:549ba18ddd81 | 1012 | * @brief Checks whether the last I2Cx Event is equal to the one passed |
mbed_official | 126:549ba18ddd81 | 1013 | * as parameter. |
mbed_official | 126:549ba18ddd81 | 1014 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1015 | * @param I2C_EVENT: specifies the event to be checked. |
mbed_official | 126:549ba18ddd81 | 1016 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 1017 | * @arg I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED : EV1 |
mbed_official | 126:549ba18ddd81 | 1018 | * @arg I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED : EV1 |
mbed_official | 126:549ba18ddd81 | 1019 | * @arg I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED : EV1 |
mbed_official | 126:549ba18ddd81 | 1020 | * @arg I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED : EV1 |
mbed_official | 126:549ba18ddd81 | 1021 | * @arg I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED : EV1 |
mbed_official | 126:549ba18ddd81 | 1022 | * @arg I2C_EVENT_SLAVE_BYTE_RECEIVED : EV2 |
mbed_official | 126:549ba18ddd81 | 1023 | * @arg (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF) : EV2 |
mbed_official | 126:549ba18ddd81 | 1024 | * @arg (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL) : EV2 |
mbed_official | 126:549ba18ddd81 | 1025 | * @arg I2C_EVENT_SLAVE_BYTE_TRANSMITTED : EV3 |
mbed_official | 126:549ba18ddd81 | 1026 | * @arg (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF) : EV3 |
mbed_official | 126:549ba18ddd81 | 1027 | * @arg (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL) : EV3 |
mbed_official | 126:549ba18ddd81 | 1028 | * @arg I2C_EVENT_SLAVE_ACK_FAILURE : EV3_2 |
mbed_official | 126:549ba18ddd81 | 1029 | * @arg I2C_EVENT_SLAVE_STOP_DETECTED : EV4 |
mbed_official | 126:549ba18ddd81 | 1030 | * @arg I2C_EVENT_MASTER_MODE_SELECT : EV5 |
mbed_official | 126:549ba18ddd81 | 1031 | * @arg I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED : EV6 |
mbed_official | 126:549ba18ddd81 | 1032 | * @arg I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED : EV6 |
mbed_official | 126:549ba18ddd81 | 1033 | * @arg I2C_EVENT_MASTER_BYTE_RECEIVED : EV7 |
mbed_official | 126:549ba18ddd81 | 1034 | * @arg I2C_EVENT_MASTER_BYTE_TRANSMITTING : EV8 |
mbed_official | 126:549ba18ddd81 | 1035 | * @arg I2C_EVENT_MASTER_BYTE_TRANSMITTED : EV8_2 |
mbed_official | 126:549ba18ddd81 | 1036 | * @arg I2C_EVENT_MASTER_MODE_ADDRESS10 : EV9 |
mbed_official | 126:549ba18ddd81 | 1037 | * |
mbed_official | 126:549ba18ddd81 | 1038 | * @note: For detailed description of Events, please refer to section |
mbed_official | 126:549ba18ddd81 | 1039 | * I2C_Events in stm32f10x_i2c.h file. |
mbed_official | 126:549ba18ddd81 | 1040 | * |
mbed_official | 126:549ba18ddd81 | 1041 | * @retval An ErrorStatus enumeration value: |
mbed_official | 126:549ba18ddd81 | 1042 | * - SUCCESS: Last event is equal to the I2C_EVENT |
mbed_official | 126:549ba18ddd81 | 1043 | * - ERROR: Last event is different from the I2C_EVENT |
mbed_official | 126:549ba18ddd81 | 1044 | */ |
mbed_official | 126:549ba18ddd81 | 1045 | ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT) |
mbed_official | 126:549ba18ddd81 | 1046 | { |
mbed_official | 126:549ba18ddd81 | 1047 | uint32_t lastevent = 0; |
mbed_official | 126:549ba18ddd81 | 1048 | uint32_t flag1 = 0, flag2 = 0; |
mbed_official | 126:549ba18ddd81 | 1049 | ErrorStatus status = ERROR; |
mbed_official | 126:549ba18ddd81 | 1050 | |
mbed_official | 126:549ba18ddd81 | 1051 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1052 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1053 | assert_param(IS_I2C_EVENT(I2C_EVENT)); |
mbed_official | 126:549ba18ddd81 | 1054 | |
mbed_official | 126:549ba18ddd81 | 1055 | /* Read the I2Cx status register */ |
mbed_official | 126:549ba18ddd81 | 1056 | flag1 = I2Cx->SR1; |
mbed_official | 126:549ba18ddd81 | 1057 | flag2 = I2Cx->SR2; |
mbed_official | 126:549ba18ddd81 | 1058 | flag2 = flag2 << 16; |
mbed_official | 126:549ba18ddd81 | 1059 | |
mbed_official | 126:549ba18ddd81 | 1060 | /* Get the last event value from I2C status register */ |
mbed_official | 126:549ba18ddd81 | 1061 | lastevent = (flag1 | flag2) & FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1062 | |
mbed_official | 126:549ba18ddd81 | 1063 | /* Check whether the last event contains the I2C_EVENT */ |
mbed_official | 126:549ba18ddd81 | 1064 | if ((lastevent & I2C_EVENT) == I2C_EVENT) |
mbed_official | 126:549ba18ddd81 | 1065 | { |
mbed_official | 126:549ba18ddd81 | 1066 | /* SUCCESS: last event is equal to I2C_EVENT */ |
mbed_official | 126:549ba18ddd81 | 1067 | status = SUCCESS; |
mbed_official | 126:549ba18ddd81 | 1068 | } |
mbed_official | 126:549ba18ddd81 | 1069 | else |
mbed_official | 126:549ba18ddd81 | 1070 | { |
mbed_official | 126:549ba18ddd81 | 1071 | /* ERROR: last event is different from I2C_EVENT */ |
mbed_official | 126:549ba18ddd81 | 1072 | status = ERROR; |
mbed_official | 126:549ba18ddd81 | 1073 | } |
mbed_official | 126:549ba18ddd81 | 1074 | /* Return status */ |
mbed_official | 126:549ba18ddd81 | 1075 | return status; |
mbed_official | 126:549ba18ddd81 | 1076 | } |
mbed_official | 126:549ba18ddd81 | 1077 | |
mbed_official | 126:549ba18ddd81 | 1078 | /** |
mbed_official | 126:549ba18ddd81 | 1079 | * |
mbed_official | 126:549ba18ddd81 | 1080 | * 2) Advanced state monitoring |
mbed_official | 126:549ba18ddd81 | 1081 | ******************************************************************************* |
mbed_official | 126:549ba18ddd81 | 1082 | */ |
mbed_official | 126:549ba18ddd81 | 1083 | |
mbed_official | 126:549ba18ddd81 | 1084 | /** |
mbed_official | 126:549ba18ddd81 | 1085 | * @brief Returns the last I2Cx Event. |
mbed_official | 126:549ba18ddd81 | 1086 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1087 | * |
mbed_official | 126:549ba18ddd81 | 1088 | * @note: For detailed description of Events, please refer to section |
mbed_official | 126:549ba18ddd81 | 1089 | * I2C_Events in stm32f10x_i2c.h file. |
mbed_official | 126:549ba18ddd81 | 1090 | * |
mbed_official | 126:549ba18ddd81 | 1091 | * @retval The last event |
mbed_official | 126:549ba18ddd81 | 1092 | */ |
mbed_official | 126:549ba18ddd81 | 1093 | uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx) |
mbed_official | 126:549ba18ddd81 | 1094 | { |
mbed_official | 126:549ba18ddd81 | 1095 | uint32_t lastevent = 0; |
mbed_official | 126:549ba18ddd81 | 1096 | uint32_t flag1 = 0, flag2 = 0; |
mbed_official | 126:549ba18ddd81 | 1097 | |
mbed_official | 126:549ba18ddd81 | 1098 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1099 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1100 | |
mbed_official | 126:549ba18ddd81 | 1101 | /* Read the I2Cx status register */ |
mbed_official | 126:549ba18ddd81 | 1102 | flag1 = I2Cx->SR1; |
mbed_official | 126:549ba18ddd81 | 1103 | flag2 = I2Cx->SR2; |
mbed_official | 126:549ba18ddd81 | 1104 | flag2 = flag2 << 16; |
mbed_official | 126:549ba18ddd81 | 1105 | |
mbed_official | 126:549ba18ddd81 | 1106 | /* Get the last event value from I2C status register */ |
mbed_official | 126:549ba18ddd81 | 1107 | lastevent = (flag1 | flag2) & FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1108 | |
mbed_official | 126:549ba18ddd81 | 1109 | /* Return status */ |
mbed_official | 126:549ba18ddd81 | 1110 | return lastevent; |
mbed_official | 126:549ba18ddd81 | 1111 | } |
mbed_official | 126:549ba18ddd81 | 1112 | |
mbed_official | 126:549ba18ddd81 | 1113 | /** |
mbed_official | 126:549ba18ddd81 | 1114 | * |
mbed_official | 126:549ba18ddd81 | 1115 | * 3) Flag-based state monitoring |
mbed_official | 126:549ba18ddd81 | 1116 | ******************************************************************************* |
mbed_official | 126:549ba18ddd81 | 1117 | */ |
mbed_official | 126:549ba18ddd81 | 1118 | |
mbed_official | 126:549ba18ddd81 | 1119 | /** |
mbed_official | 126:549ba18ddd81 | 1120 | * @brief Checks whether the specified I2C flag is set or not. |
mbed_official | 126:549ba18ddd81 | 1121 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1122 | * @param I2C_FLAG: specifies the flag to check. |
mbed_official | 126:549ba18ddd81 | 1123 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 1124 | * @arg I2C_FLAG_DUALF: Dual flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1125 | * @arg I2C_FLAG_SMBHOST: SMBus host header (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1126 | * @arg I2C_FLAG_SMBDEFAULT: SMBus default header (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1127 | * @arg I2C_FLAG_GENCALL: General call header flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1128 | * @arg I2C_FLAG_TRA: Transmitter/Receiver flag |
mbed_official | 126:549ba18ddd81 | 1129 | * @arg I2C_FLAG_BUSY: Bus busy flag |
mbed_official | 126:549ba18ddd81 | 1130 | * @arg I2C_FLAG_MSL: Master/Slave flag |
mbed_official | 126:549ba18ddd81 | 1131 | * @arg I2C_FLAG_SMBALERT: SMBus Alert flag |
mbed_official | 126:549ba18ddd81 | 1132 | * @arg I2C_FLAG_TIMEOUT: Timeout or Tlow error flag |
mbed_official | 126:549ba18ddd81 | 1133 | * @arg I2C_FLAG_PECERR: PEC error in reception flag |
mbed_official | 126:549ba18ddd81 | 1134 | * @arg I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1135 | * @arg I2C_FLAG_AF: Acknowledge failure flag |
mbed_official | 126:549ba18ddd81 | 1136 | * @arg I2C_FLAG_ARLO: Arbitration lost flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1137 | * @arg I2C_FLAG_BERR: Bus error flag |
mbed_official | 126:549ba18ddd81 | 1138 | * @arg I2C_FLAG_TXE: Data register empty flag (Transmitter) |
mbed_official | 126:549ba18ddd81 | 1139 | * @arg I2C_FLAG_RXNE: Data register not empty (Receiver) flag |
mbed_official | 126:549ba18ddd81 | 1140 | * @arg I2C_FLAG_STOPF: Stop detection flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1141 | * @arg I2C_FLAG_ADD10: 10-bit header sent flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1142 | * @arg I2C_FLAG_BTF: Byte transfer finished flag |
mbed_official | 126:549ba18ddd81 | 1143 | * @arg I2C_FLAG_ADDR: Address sent flag (Master mode) "ADSL" |
mbed_official | 126:549ba18ddd81 | 1144 | * Address matched flag (Slave mode)"ENDA" |
mbed_official | 126:549ba18ddd81 | 1145 | * @arg I2C_FLAG_SB: Start bit flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1146 | * @retval The new state of I2C_FLAG (SET or RESET). |
mbed_official | 126:549ba18ddd81 | 1147 | */ |
mbed_official | 126:549ba18ddd81 | 1148 | FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG) |
mbed_official | 126:549ba18ddd81 | 1149 | { |
mbed_official | 126:549ba18ddd81 | 1150 | FlagStatus bitstatus = RESET; |
mbed_official | 126:549ba18ddd81 | 1151 | __IO uint32_t i2creg = 0, i2cxbase = 0; |
mbed_official | 126:549ba18ddd81 | 1152 | |
mbed_official | 126:549ba18ddd81 | 1153 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1154 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1155 | assert_param(IS_I2C_GET_FLAG(I2C_FLAG)); |
mbed_official | 126:549ba18ddd81 | 1156 | |
mbed_official | 126:549ba18ddd81 | 1157 | /* Get the I2Cx peripheral base address */ |
mbed_official | 126:549ba18ddd81 | 1158 | i2cxbase = (uint32_t)I2Cx; |
mbed_official | 126:549ba18ddd81 | 1159 | |
mbed_official | 126:549ba18ddd81 | 1160 | /* Read flag register index */ |
mbed_official | 126:549ba18ddd81 | 1161 | i2creg = I2C_FLAG >> 28; |
mbed_official | 126:549ba18ddd81 | 1162 | |
mbed_official | 126:549ba18ddd81 | 1163 | /* Get bit[23:0] of the flag */ |
mbed_official | 126:549ba18ddd81 | 1164 | I2C_FLAG &= FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1165 | |
mbed_official | 126:549ba18ddd81 | 1166 | if(i2creg != 0) |
mbed_official | 126:549ba18ddd81 | 1167 | { |
mbed_official | 126:549ba18ddd81 | 1168 | /* Get the I2Cx SR1 register address */ |
mbed_official | 126:549ba18ddd81 | 1169 | i2cxbase += 0x14; |
mbed_official | 126:549ba18ddd81 | 1170 | } |
mbed_official | 126:549ba18ddd81 | 1171 | else |
mbed_official | 126:549ba18ddd81 | 1172 | { |
mbed_official | 126:549ba18ddd81 | 1173 | /* Flag in I2Cx SR2 Register */ |
mbed_official | 126:549ba18ddd81 | 1174 | I2C_FLAG = (uint32_t)(I2C_FLAG >> 16); |
mbed_official | 126:549ba18ddd81 | 1175 | /* Get the I2Cx SR2 register address */ |
mbed_official | 126:549ba18ddd81 | 1176 | i2cxbase += 0x18; |
mbed_official | 126:549ba18ddd81 | 1177 | } |
mbed_official | 126:549ba18ddd81 | 1178 | |
mbed_official | 126:549ba18ddd81 | 1179 | if(((*(__IO uint32_t *)i2cxbase) & I2C_FLAG) != (uint32_t)RESET) |
mbed_official | 126:549ba18ddd81 | 1180 | { |
mbed_official | 126:549ba18ddd81 | 1181 | /* I2C_FLAG is set */ |
mbed_official | 126:549ba18ddd81 | 1182 | bitstatus = SET; |
mbed_official | 126:549ba18ddd81 | 1183 | } |
mbed_official | 126:549ba18ddd81 | 1184 | else |
mbed_official | 126:549ba18ddd81 | 1185 | { |
mbed_official | 126:549ba18ddd81 | 1186 | /* I2C_FLAG is reset */ |
mbed_official | 126:549ba18ddd81 | 1187 | bitstatus = RESET; |
mbed_official | 126:549ba18ddd81 | 1188 | } |
mbed_official | 126:549ba18ddd81 | 1189 | |
mbed_official | 126:549ba18ddd81 | 1190 | /* Return the I2C_FLAG status */ |
mbed_official | 126:549ba18ddd81 | 1191 | return bitstatus; |
mbed_official | 126:549ba18ddd81 | 1192 | } |
mbed_official | 126:549ba18ddd81 | 1193 | |
mbed_official | 126:549ba18ddd81 | 1194 | |
mbed_official | 126:549ba18ddd81 | 1195 | |
mbed_official | 126:549ba18ddd81 | 1196 | /** |
mbed_official | 126:549ba18ddd81 | 1197 | * @brief Clears the I2Cx's pending flags. |
mbed_official | 126:549ba18ddd81 | 1198 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1199 | * @param I2C_FLAG: specifies the flag to clear. |
mbed_official | 126:549ba18ddd81 | 1200 | * This parameter can be any combination of the following values: |
mbed_official | 126:549ba18ddd81 | 1201 | * @arg I2C_FLAG_SMBALERT: SMBus Alert flag |
mbed_official | 126:549ba18ddd81 | 1202 | * @arg I2C_FLAG_TIMEOUT: Timeout or Tlow error flag |
mbed_official | 126:549ba18ddd81 | 1203 | * @arg I2C_FLAG_PECERR: PEC error in reception flag |
mbed_official | 126:549ba18ddd81 | 1204 | * @arg I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1205 | * @arg I2C_FLAG_AF: Acknowledge failure flag |
mbed_official | 126:549ba18ddd81 | 1206 | * @arg I2C_FLAG_ARLO: Arbitration lost flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1207 | * @arg I2C_FLAG_BERR: Bus error flag |
mbed_official | 126:549ba18ddd81 | 1208 | * |
mbed_official | 126:549ba18ddd81 | 1209 | * @note |
mbed_official | 126:549ba18ddd81 | 1210 | * - STOPF (STOP detection) is cleared by software sequence: a read operation |
mbed_official | 126:549ba18ddd81 | 1211 | * to I2C_SR1 register (I2C_GetFlagStatus()) followed by a write operation |
mbed_official | 126:549ba18ddd81 | 1212 | * to I2C_CR1 register (I2C_Cmd() to re-enable the I2C peripheral). |
mbed_official | 126:549ba18ddd81 | 1213 | * - ADD10 (10-bit header sent) is cleared by software sequence: a read |
mbed_official | 126:549ba18ddd81 | 1214 | * operation to I2C_SR1 (I2C_GetFlagStatus()) followed by writing the |
mbed_official | 126:549ba18ddd81 | 1215 | * second byte of the address in DR register. |
mbed_official | 126:549ba18ddd81 | 1216 | * - BTF (Byte Transfer Finished) is cleared by software sequence: a read |
mbed_official | 126:549ba18ddd81 | 1217 | * operation to I2C_SR1 register (I2C_GetFlagStatus()) followed by a |
mbed_official | 126:549ba18ddd81 | 1218 | * read/write to I2C_DR register (I2C_SendData()). |
mbed_official | 126:549ba18ddd81 | 1219 | * - ADDR (Address sent) is cleared by software sequence: a read operation to |
mbed_official | 126:549ba18ddd81 | 1220 | * I2C_SR1 register (I2C_GetFlagStatus()) followed by a read operation to |
mbed_official | 126:549ba18ddd81 | 1221 | * I2C_SR2 register ((void)(I2Cx->SR2)). |
mbed_official | 126:549ba18ddd81 | 1222 | * - SB (Start Bit) is cleared software sequence: a read operation to I2C_SR1 |
mbed_official | 126:549ba18ddd81 | 1223 | * register (I2C_GetFlagStatus()) followed by a write operation to I2C_DR |
mbed_official | 126:549ba18ddd81 | 1224 | * register (I2C_SendData()). |
mbed_official | 126:549ba18ddd81 | 1225 | * @retval None |
mbed_official | 126:549ba18ddd81 | 1226 | */ |
mbed_official | 126:549ba18ddd81 | 1227 | void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG) |
mbed_official | 126:549ba18ddd81 | 1228 | { |
mbed_official | 126:549ba18ddd81 | 1229 | uint32_t flagpos = 0; |
mbed_official | 126:549ba18ddd81 | 1230 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1231 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1232 | assert_param(IS_I2C_CLEAR_FLAG(I2C_FLAG)); |
mbed_official | 126:549ba18ddd81 | 1233 | /* Get the I2C flag position */ |
mbed_official | 126:549ba18ddd81 | 1234 | flagpos = I2C_FLAG & FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1235 | /* Clear the selected I2C flag */ |
mbed_official | 126:549ba18ddd81 | 1236 | I2Cx->SR1 = (uint16_t)~flagpos; |
mbed_official | 126:549ba18ddd81 | 1237 | } |
mbed_official | 126:549ba18ddd81 | 1238 | |
mbed_official | 126:549ba18ddd81 | 1239 | /** |
mbed_official | 126:549ba18ddd81 | 1240 | * @brief Checks whether the specified I2C interrupt has occurred or not. |
mbed_official | 126:549ba18ddd81 | 1241 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1242 | * @param I2C_IT: specifies the interrupt source to check. |
mbed_official | 126:549ba18ddd81 | 1243 | * This parameter can be one of the following values: |
mbed_official | 126:549ba18ddd81 | 1244 | * @arg I2C_IT_SMBALERT: SMBus Alert flag |
mbed_official | 126:549ba18ddd81 | 1245 | * @arg I2C_IT_TIMEOUT: Timeout or Tlow error flag |
mbed_official | 126:549ba18ddd81 | 1246 | * @arg I2C_IT_PECERR: PEC error in reception flag |
mbed_official | 126:549ba18ddd81 | 1247 | * @arg I2C_IT_OVR: Overrun/Underrun flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1248 | * @arg I2C_IT_AF: Acknowledge failure flag |
mbed_official | 126:549ba18ddd81 | 1249 | * @arg I2C_IT_ARLO: Arbitration lost flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1250 | * @arg I2C_IT_BERR: Bus error flag |
mbed_official | 126:549ba18ddd81 | 1251 | * @arg I2C_IT_TXE: Data register empty flag (Transmitter) |
mbed_official | 126:549ba18ddd81 | 1252 | * @arg I2C_IT_RXNE: Data register not empty (Receiver) flag |
mbed_official | 126:549ba18ddd81 | 1253 | * @arg I2C_IT_STOPF: Stop detection flag (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1254 | * @arg I2C_IT_ADD10: 10-bit header sent flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1255 | * @arg I2C_IT_BTF: Byte transfer finished flag |
mbed_official | 126:549ba18ddd81 | 1256 | * @arg I2C_IT_ADDR: Address sent flag (Master mode) "ADSL" |
mbed_official | 126:549ba18ddd81 | 1257 | * Address matched flag (Slave mode)"ENDAD" |
mbed_official | 126:549ba18ddd81 | 1258 | * @arg I2C_IT_SB: Start bit flag (Master mode) |
mbed_official | 126:549ba18ddd81 | 1259 | * @retval The new state of I2C_IT (SET or RESET). |
mbed_official | 126:549ba18ddd81 | 1260 | */ |
mbed_official | 126:549ba18ddd81 | 1261 | ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT) |
mbed_official | 126:549ba18ddd81 | 1262 | { |
mbed_official | 126:549ba18ddd81 | 1263 | ITStatus bitstatus = RESET; |
mbed_official | 126:549ba18ddd81 | 1264 | uint32_t enablestatus = 0; |
mbed_official | 126:549ba18ddd81 | 1265 | |
mbed_official | 126:549ba18ddd81 | 1266 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1267 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1268 | assert_param(IS_I2C_GET_IT(I2C_IT)); |
mbed_official | 126:549ba18ddd81 | 1269 | |
mbed_official | 126:549ba18ddd81 | 1270 | /* Check if the interrupt source is enabled or not */ |
mbed_official | 126:549ba18ddd81 | 1271 | enablestatus = (uint32_t)(((I2C_IT & ITEN_Mask) >> 16) & (I2Cx->CR2)) ; |
mbed_official | 126:549ba18ddd81 | 1272 | |
mbed_official | 126:549ba18ddd81 | 1273 | /* Get bit[23:0] of the flag */ |
mbed_official | 126:549ba18ddd81 | 1274 | I2C_IT &= FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1275 | |
mbed_official | 126:549ba18ddd81 | 1276 | /* Check the status of the specified I2C flag */ |
mbed_official | 126:549ba18ddd81 | 1277 | if (((I2Cx->SR1 & I2C_IT) != (uint32_t)RESET) && enablestatus) |
mbed_official | 126:549ba18ddd81 | 1278 | { |
mbed_official | 126:549ba18ddd81 | 1279 | /* I2C_IT is set */ |
mbed_official | 126:549ba18ddd81 | 1280 | bitstatus = SET; |
mbed_official | 126:549ba18ddd81 | 1281 | } |
mbed_official | 126:549ba18ddd81 | 1282 | else |
mbed_official | 126:549ba18ddd81 | 1283 | { |
mbed_official | 126:549ba18ddd81 | 1284 | /* I2C_IT is reset */ |
mbed_official | 126:549ba18ddd81 | 1285 | bitstatus = RESET; |
mbed_official | 126:549ba18ddd81 | 1286 | } |
mbed_official | 126:549ba18ddd81 | 1287 | /* Return the I2C_IT status */ |
mbed_official | 126:549ba18ddd81 | 1288 | return bitstatus; |
mbed_official | 126:549ba18ddd81 | 1289 | } |
mbed_official | 126:549ba18ddd81 | 1290 | |
mbed_official | 126:549ba18ddd81 | 1291 | /** |
mbed_official | 126:549ba18ddd81 | 1292 | * @brief Clears the I2Cxs interrupt pending bits. |
mbed_official | 126:549ba18ddd81 | 1293 | * @param I2Cx: where x can be 1 or 2 to select the I2C peripheral. |
mbed_official | 126:549ba18ddd81 | 1294 | * @param I2C_IT: specifies the interrupt pending bit to clear. |
mbed_official | 126:549ba18ddd81 | 1295 | * This parameter can be any combination of the following values: |
mbed_official | 126:549ba18ddd81 | 1296 | * @arg I2C_IT_SMBALERT: SMBus Alert interrupt |
mbed_official | 126:549ba18ddd81 | 1297 | * @arg I2C_IT_TIMEOUT: Timeout or Tlow error interrupt |
mbed_official | 126:549ba18ddd81 | 1298 | * @arg I2C_IT_PECERR: PEC error in reception interrupt |
mbed_official | 126:549ba18ddd81 | 1299 | * @arg I2C_IT_OVR: Overrun/Underrun interrupt (Slave mode) |
mbed_official | 126:549ba18ddd81 | 1300 | * @arg I2C_IT_AF: Acknowledge failure interrupt |
mbed_official | 126:549ba18ddd81 | 1301 | * @arg I2C_IT_ARLO: Arbitration lost interrupt (Master mode) |
mbed_official | 126:549ba18ddd81 | 1302 | * @arg I2C_IT_BERR: Bus error interrupt |
mbed_official | 126:549ba18ddd81 | 1303 | * |
mbed_official | 126:549ba18ddd81 | 1304 | * @note |
mbed_official | 126:549ba18ddd81 | 1305 | * - STOPF (STOP detection) is cleared by software sequence: a read operation |
mbed_official | 126:549ba18ddd81 | 1306 | * to I2C_SR1 register (I2C_GetITStatus()) followed by a write operation to |
mbed_official | 126:549ba18ddd81 | 1307 | * I2C_CR1 register (I2C_Cmd() to re-enable the I2C peripheral). |
mbed_official | 126:549ba18ddd81 | 1308 | * - ADD10 (10-bit header sent) is cleared by software sequence: a read |
mbed_official | 126:549ba18ddd81 | 1309 | * operation to I2C_SR1 (I2C_GetITStatus()) followed by writing the second |
mbed_official | 126:549ba18ddd81 | 1310 | * byte of the address in I2C_DR register. |
mbed_official | 126:549ba18ddd81 | 1311 | * - BTF (Byte Transfer Finished) is cleared by software sequence: a read |
mbed_official | 126:549ba18ddd81 | 1312 | * operation to I2C_SR1 register (I2C_GetITStatus()) followed by a |
mbed_official | 126:549ba18ddd81 | 1313 | * read/write to I2C_DR register (I2C_SendData()). |
mbed_official | 126:549ba18ddd81 | 1314 | * - ADDR (Address sent) is cleared by software sequence: a read operation to |
mbed_official | 126:549ba18ddd81 | 1315 | * I2C_SR1 register (I2C_GetITStatus()) followed by a read operation to |
mbed_official | 126:549ba18ddd81 | 1316 | * I2C_SR2 register ((void)(I2Cx->SR2)). |
mbed_official | 126:549ba18ddd81 | 1317 | * - SB (Start Bit) is cleared by software sequence: a read operation to |
mbed_official | 126:549ba18ddd81 | 1318 | * I2C_SR1 register (I2C_GetITStatus()) followed by a write operation to |
mbed_official | 126:549ba18ddd81 | 1319 | * I2C_DR register (I2C_SendData()). |
mbed_official | 126:549ba18ddd81 | 1320 | * @retval None |
mbed_official | 126:549ba18ddd81 | 1321 | */ |
mbed_official | 126:549ba18ddd81 | 1322 | void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT) |
mbed_official | 126:549ba18ddd81 | 1323 | { |
mbed_official | 126:549ba18ddd81 | 1324 | uint32_t flagpos = 0; |
mbed_official | 126:549ba18ddd81 | 1325 | /* Check the parameters */ |
mbed_official | 126:549ba18ddd81 | 1326 | assert_param(IS_I2C_ALL_PERIPH(I2Cx)); |
mbed_official | 126:549ba18ddd81 | 1327 | assert_param(IS_I2C_CLEAR_IT(I2C_IT)); |
mbed_official | 126:549ba18ddd81 | 1328 | /* Get the I2C flag position */ |
mbed_official | 126:549ba18ddd81 | 1329 | flagpos = I2C_IT & FLAG_Mask; |
mbed_official | 126:549ba18ddd81 | 1330 | /* Clear the selected I2C flag */ |
mbed_official | 126:549ba18ddd81 | 1331 | I2Cx->SR1 = (uint16_t)~flagpos; |
mbed_official | 126:549ba18ddd81 | 1332 | } |
mbed_official | 126:549ba18ddd81 | 1333 | |
mbed_official | 126:549ba18ddd81 | 1334 | /** |
mbed_official | 126:549ba18ddd81 | 1335 | * @} |
mbed_official | 126:549ba18ddd81 | 1336 | */ |
mbed_official | 126:549ba18ddd81 | 1337 | |
mbed_official | 126:549ba18ddd81 | 1338 | /** |
mbed_official | 126:549ba18ddd81 | 1339 | * @} |
mbed_official | 126:549ba18ddd81 | 1340 | */ |
mbed_official | 126:549ba18ddd81 | 1341 | |
mbed_official | 126:549ba18ddd81 | 1342 | /** |
mbed_official | 126:549ba18ddd81 | 1343 | * @} |
mbed_official | 126:549ba18ddd81 | 1344 | */ |
mbed_official | 126:549ba18ddd81 | 1345 | |
mbed_official | 126:549ba18ddd81 | 1346 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |