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mbed-stm32l0/l1-src
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mbed official
targets/hal/TARGET_STM/TARGET_STM32F3/spi_api.c@508:4f5903e025e6, 2015-04-09 (annotated)
- Committer:
- mbed_official
- Date:
- Thu Apr 09 06:45:08 2015 +0100
- Revision:
- 508:4f5903e025e6
- Child:
- 544:1af5f1c39e80
Synchronized with git revision 643cd23443352254ef51f4be0974b6e526142078
Full URL: https://github.com/mbedmicro/mbed/commit/643cd23443352254ef51f4be0974b6e526142078/
STM32F3xx - hal reorganization
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 508:4f5903e025e6 | 1 | /* mbed Microcontroller Library |
| mbed_official | 508:4f5903e025e6 | 2 | ******************************************************************************* |
| mbed_official | 508:4f5903e025e6 | 3 | * Copyright (c) 2014, STMicroelectronics |
| mbed_official | 508:4f5903e025e6 | 4 | * All rights reserved. |
| mbed_official | 508:4f5903e025e6 | 5 | * |
| mbed_official | 508:4f5903e025e6 | 6 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 508:4f5903e025e6 | 7 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 508:4f5903e025e6 | 8 | * |
| mbed_official | 508:4f5903e025e6 | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 508:4f5903e025e6 | 10 | * this list of conditions and the following disclaimer. |
| mbed_official | 508:4f5903e025e6 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 508:4f5903e025e6 | 12 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 508:4f5903e025e6 | 13 | * and/or other materials provided with the distribution. |
| mbed_official | 508:4f5903e025e6 | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| mbed_official | 508:4f5903e025e6 | 15 | * may be used to endorse or promote products derived from this software |
| mbed_official | 508:4f5903e025e6 | 16 | * without specific prior written permission. |
| mbed_official | 508:4f5903e025e6 | 17 | * |
| mbed_official | 508:4f5903e025e6 | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| mbed_official | 508:4f5903e025e6 | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| mbed_official | 508:4f5903e025e6 | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| mbed_official | 508:4f5903e025e6 | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| mbed_official | 508:4f5903e025e6 | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 508:4f5903e025e6 | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| mbed_official | 508:4f5903e025e6 | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| mbed_official | 508:4f5903e025e6 | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| mbed_official | 508:4f5903e025e6 | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| mbed_official | 508:4f5903e025e6 | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 508:4f5903e025e6 | 28 | ******************************************************************************* |
| mbed_official | 508:4f5903e025e6 | 29 | */ |
| mbed_official | 508:4f5903e025e6 | 30 | #include "mbed_assert.h" |
| mbed_official | 508:4f5903e025e6 | 31 | #include "spi_api.h" |
| mbed_official | 508:4f5903e025e6 | 32 | |
| mbed_official | 508:4f5903e025e6 | 33 | #if DEVICE_SPI |
| mbed_official | 508:4f5903e025e6 | 34 | |
| mbed_official | 508:4f5903e025e6 | 35 | #include <math.h> |
| mbed_official | 508:4f5903e025e6 | 36 | #include "cmsis.h" |
| mbed_official | 508:4f5903e025e6 | 37 | #include "pinmap.h" |
| mbed_official | 508:4f5903e025e6 | 38 | #include "PeripheralPins.h" |
| mbed_official | 508:4f5903e025e6 | 39 | |
| mbed_official | 508:4f5903e025e6 | 40 | static SPI_HandleTypeDef SpiHandle; |
| mbed_official | 508:4f5903e025e6 | 41 | |
| mbed_official | 508:4f5903e025e6 | 42 | static void init_spi(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 43 | { |
| mbed_official | 508:4f5903e025e6 | 44 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 45 | |
| mbed_official | 508:4f5903e025e6 | 46 | __HAL_SPI_DISABLE(&SpiHandle); |
| mbed_official | 508:4f5903e025e6 | 47 | |
| mbed_official | 508:4f5903e025e6 | 48 | SpiHandle.Init.Mode = obj->mode; |
| mbed_official | 508:4f5903e025e6 | 49 | SpiHandle.Init.BaudRatePrescaler = obj->br_presc; |
| mbed_official | 508:4f5903e025e6 | 50 | SpiHandle.Init.Direction = SPI_DIRECTION_2LINES; |
| mbed_official | 508:4f5903e025e6 | 51 | SpiHandle.Init.CLKPhase = obj->cpha; |
| mbed_official | 508:4f5903e025e6 | 52 | SpiHandle.Init.CLKPolarity = obj->cpol; |
| mbed_official | 508:4f5903e025e6 | 53 | SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED; |
| mbed_official | 508:4f5903e025e6 | 54 | SpiHandle.Init.CRCPolynomial = 7; |
| mbed_official | 508:4f5903e025e6 | 55 | SpiHandle.Init.DataSize = obj->bits; |
| mbed_official | 508:4f5903e025e6 | 56 | SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB; |
| mbed_official | 508:4f5903e025e6 | 57 | SpiHandle.Init.NSS = obj->nss; |
| mbed_official | 508:4f5903e025e6 | 58 | SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED; |
| mbed_official | 508:4f5903e025e6 | 59 | |
| mbed_official | 508:4f5903e025e6 | 60 | HAL_SPI_Init(&SpiHandle); |
| mbed_official | 508:4f5903e025e6 | 61 | |
| mbed_official | 508:4f5903e025e6 | 62 | __HAL_SPI_ENABLE(&SpiHandle); |
| mbed_official | 508:4f5903e025e6 | 63 | } |
| mbed_official | 508:4f5903e025e6 | 64 | |
| mbed_official | 508:4f5903e025e6 | 65 | void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) |
| mbed_official | 508:4f5903e025e6 | 66 | { |
| mbed_official | 508:4f5903e025e6 | 67 | // Determine the SPI to use |
| mbed_official | 508:4f5903e025e6 | 68 | SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI); |
| mbed_official | 508:4f5903e025e6 | 69 | SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO); |
| mbed_official | 508:4f5903e025e6 | 70 | SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK); |
| mbed_official | 508:4f5903e025e6 | 71 | SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL); |
| mbed_official | 508:4f5903e025e6 | 72 | |
| mbed_official | 508:4f5903e025e6 | 73 | SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso); |
| mbed_official | 508:4f5903e025e6 | 74 | SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel); |
| mbed_official | 508:4f5903e025e6 | 75 | |
| mbed_official | 508:4f5903e025e6 | 76 | obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl); |
| mbed_official | 508:4f5903e025e6 | 77 | MBED_ASSERT(obj->spi != (SPIName)NC); |
| mbed_official | 508:4f5903e025e6 | 78 | |
| mbed_official | 508:4f5903e025e6 | 79 | // Enable SPI clock |
| mbed_official | 508:4f5903e025e6 | 80 | #if defined(SPI1_BASE) |
| mbed_official | 508:4f5903e025e6 | 81 | if (obj->spi == SPI_1) { |
| mbed_official | 508:4f5903e025e6 | 82 | __SPI1_CLK_ENABLE(); |
| mbed_official | 508:4f5903e025e6 | 83 | } |
| mbed_official | 508:4f5903e025e6 | 84 | #endif |
| mbed_official | 508:4f5903e025e6 | 85 | |
| mbed_official | 508:4f5903e025e6 | 86 | #if defined(SPI2_BASE) |
| mbed_official | 508:4f5903e025e6 | 87 | if (obj->spi == SPI_2) { |
| mbed_official | 508:4f5903e025e6 | 88 | __SPI2_CLK_ENABLE(); |
| mbed_official | 508:4f5903e025e6 | 89 | } |
| mbed_official | 508:4f5903e025e6 | 90 | #endif |
| mbed_official | 508:4f5903e025e6 | 91 | |
| mbed_official | 508:4f5903e025e6 | 92 | #if defined(SPI3_BASE) |
| mbed_official | 508:4f5903e025e6 | 93 | if (obj->spi == SPI_3) { |
| mbed_official | 508:4f5903e025e6 | 94 | __SPI3_CLK_ENABLE(); |
| mbed_official | 508:4f5903e025e6 | 95 | } |
| mbed_official | 508:4f5903e025e6 | 96 | #endif |
| mbed_official | 508:4f5903e025e6 | 97 | |
| mbed_official | 508:4f5903e025e6 | 98 | // Configure the SPI pins |
| mbed_official | 508:4f5903e025e6 | 99 | pinmap_pinout(mosi, PinMap_SPI_MOSI); |
| mbed_official | 508:4f5903e025e6 | 100 | pinmap_pinout(miso, PinMap_SPI_MISO); |
| mbed_official | 508:4f5903e025e6 | 101 | pinmap_pinout(sclk, PinMap_SPI_SCLK); |
| mbed_official | 508:4f5903e025e6 | 102 | |
| mbed_official | 508:4f5903e025e6 | 103 | // Save new values |
| mbed_official | 508:4f5903e025e6 | 104 | obj->bits = SPI_DATASIZE_8BIT; |
| mbed_official | 508:4f5903e025e6 | 105 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 508:4f5903e025e6 | 106 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 508:4f5903e025e6 | 107 | #if defined(TARGET_STM32F334C8) |
| mbed_official | 508:4f5903e025e6 | 108 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; |
| mbed_official | 508:4f5903e025e6 | 109 | #else |
| mbed_official | 508:4f5903e025e6 | 110 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1 MHz (HSI) or 1.13 MHz (HSE) |
| mbed_official | 508:4f5903e025e6 | 111 | #endif |
| mbed_official | 508:4f5903e025e6 | 112 | |
| mbed_official | 508:4f5903e025e6 | 113 | obj->pin_miso = miso; |
| mbed_official | 508:4f5903e025e6 | 114 | obj->pin_mosi = mosi; |
| mbed_official | 508:4f5903e025e6 | 115 | obj->pin_sclk = sclk; |
| mbed_official | 508:4f5903e025e6 | 116 | obj->pin_ssel = ssel; |
| mbed_official | 508:4f5903e025e6 | 117 | |
| mbed_official | 508:4f5903e025e6 | 118 | if (ssel == NC) { // SW NSS Master mode |
| mbed_official | 508:4f5903e025e6 | 119 | obj->mode = SPI_MODE_MASTER; |
| mbed_official | 508:4f5903e025e6 | 120 | obj->nss = SPI_NSS_SOFT; |
| mbed_official | 508:4f5903e025e6 | 121 | } else { // Slave |
| mbed_official | 508:4f5903e025e6 | 122 | pinmap_pinout(ssel, PinMap_SPI_SSEL); |
| mbed_official | 508:4f5903e025e6 | 123 | obj->mode = SPI_MODE_SLAVE; |
| mbed_official | 508:4f5903e025e6 | 124 | obj->nss = SPI_NSS_HARD_INPUT; |
| mbed_official | 508:4f5903e025e6 | 125 | } |
| mbed_official | 508:4f5903e025e6 | 126 | |
| mbed_official | 508:4f5903e025e6 | 127 | init_spi(obj); |
| mbed_official | 508:4f5903e025e6 | 128 | } |
| mbed_official | 508:4f5903e025e6 | 129 | |
| mbed_official | 508:4f5903e025e6 | 130 | void spi_free(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 131 | { |
| mbed_official | 508:4f5903e025e6 | 132 | // Reset SPI and disable clock |
| mbed_official | 508:4f5903e025e6 | 133 | #if defined(SPI1_BASE) |
| mbed_official | 508:4f5903e025e6 | 134 | if (obj->spi == SPI_1) { |
| mbed_official | 508:4f5903e025e6 | 135 | __SPI1_FORCE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 136 | __SPI1_RELEASE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 137 | __SPI1_CLK_DISABLE(); |
| mbed_official | 508:4f5903e025e6 | 138 | } |
| mbed_official | 508:4f5903e025e6 | 139 | #endif |
| mbed_official | 508:4f5903e025e6 | 140 | |
| mbed_official | 508:4f5903e025e6 | 141 | #if defined(SPI2_BASE) |
| mbed_official | 508:4f5903e025e6 | 142 | if (obj->spi == SPI_2) { |
| mbed_official | 508:4f5903e025e6 | 143 | __SPI2_FORCE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 144 | __SPI2_RELEASE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 145 | __SPI2_CLK_DISABLE(); |
| mbed_official | 508:4f5903e025e6 | 146 | } |
| mbed_official | 508:4f5903e025e6 | 147 | #endif |
| mbed_official | 508:4f5903e025e6 | 148 | |
| mbed_official | 508:4f5903e025e6 | 149 | #if defined(SPI3_BASE) |
| mbed_official | 508:4f5903e025e6 | 150 | if (obj->spi == SPI_3) { |
| mbed_official | 508:4f5903e025e6 | 151 | __SPI3_FORCE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 152 | __SPI3_RELEASE_RESET(); |
| mbed_official | 508:4f5903e025e6 | 153 | __SPI3_CLK_DISABLE(); |
| mbed_official | 508:4f5903e025e6 | 154 | } |
| mbed_official | 508:4f5903e025e6 | 155 | #endif |
| mbed_official | 508:4f5903e025e6 | 156 | |
| mbed_official | 508:4f5903e025e6 | 157 | // Configure GPIOs |
| mbed_official | 508:4f5903e025e6 | 158 | pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 508:4f5903e025e6 | 159 | pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 508:4f5903e025e6 | 160 | pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 508:4f5903e025e6 | 161 | pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 508:4f5903e025e6 | 162 | } |
| mbed_official | 508:4f5903e025e6 | 163 | |
| mbed_official | 508:4f5903e025e6 | 164 | void spi_format(spi_t *obj, int bits, int mode, int slave) |
| mbed_official | 508:4f5903e025e6 | 165 | { |
| mbed_official | 508:4f5903e025e6 | 166 | // Save new values |
| mbed_official | 508:4f5903e025e6 | 167 | if (bits == 16) { |
| mbed_official | 508:4f5903e025e6 | 168 | obj->bits = SPI_DATASIZE_16BIT; |
| mbed_official | 508:4f5903e025e6 | 169 | } else { |
| mbed_official | 508:4f5903e025e6 | 170 | obj->bits = SPI_DATASIZE_8BIT; |
| mbed_official | 508:4f5903e025e6 | 171 | } |
| mbed_official | 508:4f5903e025e6 | 172 | |
| mbed_official | 508:4f5903e025e6 | 173 | switch (mode) { |
| mbed_official | 508:4f5903e025e6 | 174 | case 0: |
| mbed_official | 508:4f5903e025e6 | 175 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 508:4f5903e025e6 | 176 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 508:4f5903e025e6 | 177 | break; |
| mbed_official | 508:4f5903e025e6 | 178 | case 1: |
| mbed_official | 508:4f5903e025e6 | 179 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 508:4f5903e025e6 | 180 | obj->cpha = SPI_PHASE_2EDGE; |
| mbed_official | 508:4f5903e025e6 | 181 | break; |
| mbed_official | 508:4f5903e025e6 | 182 | case 2: |
| mbed_official | 508:4f5903e025e6 | 183 | obj->cpol = SPI_POLARITY_HIGH; |
| mbed_official | 508:4f5903e025e6 | 184 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 508:4f5903e025e6 | 185 | break; |
| mbed_official | 508:4f5903e025e6 | 186 | default: |
| mbed_official | 508:4f5903e025e6 | 187 | obj->cpol = SPI_POLARITY_HIGH; |
| mbed_official | 508:4f5903e025e6 | 188 | obj->cpha = SPI_PHASE_2EDGE; |
| mbed_official | 508:4f5903e025e6 | 189 | break; |
| mbed_official | 508:4f5903e025e6 | 190 | } |
| mbed_official | 508:4f5903e025e6 | 191 | |
| mbed_official | 508:4f5903e025e6 | 192 | if (slave == 0) { |
| mbed_official | 508:4f5903e025e6 | 193 | obj->mode = SPI_MODE_MASTER; |
| mbed_official | 508:4f5903e025e6 | 194 | obj->nss = SPI_NSS_SOFT; |
| mbed_official | 508:4f5903e025e6 | 195 | } else { |
| mbed_official | 508:4f5903e025e6 | 196 | obj->mode = SPI_MODE_SLAVE; |
| mbed_official | 508:4f5903e025e6 | 197 | obj->nss = SPI_NSS_HARD_INPUT; |
| mbed_official | 508:4f5903e025e6 | 198 | } |
| mbed_official | 508:4f5903e025e6 | 199 | |
| mbed_official | 508:4f5903e025e6 | 200 | init_spi(obj); |
| mbed_official | 508:4f5903e025e6 | 201 | } |
| mbed_official | 508:4f5903e025e6 | 202 | |
| mbed_official | 508:4f5903e025e6 | 203 | void spi_frequency(spi_t *obj, int hz) |
| mbed_official | 508:4f5903e025e6 | 204 | { |
| mbed_official | 508:4f5903e025e6 | 205 | #if defined(TARGET_STM32F334C8) |
| mbed_official | 508:4f5903e025e6 | 206 | // Values depend of APB2CLK : 64 MHz if HSI is used, 72 MHz if HSE is used |
| mbed_official | 508:4f5903e025e6 | 207 | if (hz < 500000) { |
| mbed_official | 508:4f5903e025e6 | 208 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 250 kHz - 281 kHz |
| mbed_official | 508:4f5903e025e6 | 209 | } else if ((hz >= 500000) && (hz < 1000000)) { |
| mbed_official | 508:4f5903e025e6 | 210 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 500 kHz - 563 kHz |
| mbed_official | 508:4f5903e025e6 | 211 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
| mbed_official | 508:4f5903e025e6 | 212 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1 MHz - 1.13 MHz |
| mbed_official | 508:4f5903e025e6 | 213 | } else if ((hz >= 2000000) && (hz < 4000000)) { |
| mbed_official | 508:4f5903e025e6 | 214 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2 MHz - 2.25 MHz |
| mbed_official | 508:4f5903e025e6 | 215 | } else if ((hz >= 4000000) && (hz < 8000000)) { |
| mbed_official | 508:4f5903e025e6 | 216 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 4 MHz - 4.5 MHz |
| mbed_official | 508:4f5903e025e6 | 217 | } else if ((hz >= 8000000) && (hz < 16000000)) { |
| mbed_official | 508:4f5903e025e6 | 218 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 8 MHz - 9 MHz |
| mbed_official | 508:4f5903e025e6 | 219 | } else if ((hz >= 16000000) && (hz < 32000000)) { |
| mbed_official | 508:4f5903e025e6 | 220 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 16 MHz - 18 MHz |
| mbed_official | 508:4f5903e025e6 | 221 | } else { // >= 32000000 |
| mbed_official | 508:4f5903e025e6 | 222 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 32 MHz - 36 MHz |
| mbed_official | 508:4f5903e025e6 | 223 | } |
| mbed_official | 508:4f5903e025e6 | 224 | #elif defined(TARGET_STM32F302R8) |
| mbed_official | 508:4f5903e025e6 | 225 | if (hz < 250000) { |
| mbed_official | 508:4f5903e025e6 | 226 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 125 kHz - 141 kHz |
| mbed_official | 508:4f5903e025e6 | 227 | } else if ((hz >= 250000) && (hz < 500000)) { |
| mbed_official | 508:4f5903e025e6 | 228 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 250 kHz - 280 kHz |
| mbed_official | 508:4f5903e025e6 | 229 | } else if ((hz >= 500000) && (hz < 1000000)) { |
| mbed_official | 508:4f5903e025e6 | 230 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 500 kHz - 560 kHz |
| mbed_official | 508:4f5903e025e6 | 231 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
| mbed_official | 508:4f5903e025e6 | 232 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1 MHz - 1.13 MHz |
| mbed_official | 508:4f5903e025e6 | 233 | } else if ((hz >= 2000000) && (hz < 4000000)) { |
| mbed_official | 508:4f5903e025e6 | 234 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 2 MHz - 2.25 MHz |
| mbed_official | 508:4f5903e025e6 | 235 | } else if ((hz >= 4000000) && (hz < 8000000)) { |
| mbed_official | 508:4f5903e025e6 | 236 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 4 MHz - 4.5 MHz |
| mbed_official | 508:4f5903e025e6 | 237 | } else if ((hz >= 8000000) && (hz < 16000000)) { |
| mbed_official | 508:4f5903e025e6 | 238 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 8 MHz - 9 MHz |
| mbed_official | 508:4f5903e025e6 | 239 | } else { // >= 16000000 |
| mbed_official | 508:4f5903e025e6 | 240 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 16 MHz - 18 MHz |
| mbed_official | 508:4f5903e025e6 | 241 | } |
| mbed_official | 508:4f5903e025e6 | 242 | |
| mbed_official | 508:4f5903e025e6 | 243 | #else |
| mbed_official | 508:4f5903e025e6 | 244 | // Values depend of APB1CLK and APB2CLK : 32 MHz if HSI is used, 36 MHz if HSE is used |
| mbed_official | 508:4f5903e025e6 | 245 | if (obj->spi == SPI_1) { |
| mbed_official | 508:4f5903e025e6 | 246 | if (hz < 500000) { |
| mbed_official | 508:4f5903e025e6 | 247 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 250 kHz - 280 kHz |
| mbed_official | 508:4f5903e025e6 | 248 | } else if ((hz >= 500000) && (hz < 1000000)) { |
| mbed_official | 508:4f5903e025e6 | 249 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 500 kHz - 560 kHz |
| mbed_official | 508:4f5903e025e6 | 250 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
| mbed_official | 508:4f5903e025e6 | 251 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1 MHz - 1.13 MHz |
| mbed_official | 508:4f5903e025e6 | 252 | } else if ((hz >= 2000000) && (hz < 4000000)) { |
| mbed_official | 508:4f5903e025e6 | 253 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2 MHz - 2.25 MHz |
| mbed_official | 508:4f5903e025e6 | 254 | } else if ((hz >= 4000000) && (hz < 8000000)) { |
| mbed_official | 508:4f5903e025e6 | 255 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 4 MHz - 4.5 MHz |
| mbed_official | 508:4f5903e025e6 | 256 | } else if ((hz >= 8000000) && (hz < 16000000)) { |
| mbed_official | 508:4f5903e025e6 | 257 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 8 MHz - 9 MHz |
| mbed_official | 508:4f5903e025e6 | 258 | } else if ((hz >= 16000000) && (hz < 32000000)) { |
| mbed_official | 508:4f5903e025e6 | 259 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 16 MHz - 18 MHz |
| mbed_official | 508:4f5903e025e6 | 260 | } else { // >= 32000000 |
| mbed_official | 508:4f5903e025e6 | 261 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 32 MHz - 36 MHz |
| mbed_official | 508:4f5903e025e6 | 262 | } |
| mbed_official | 508:4f5903e025e6 | 263 | } else { |
| mbed_official | 508:4f5903e025e6 | 264 | if (hz < 250000) { |
| mbed_official | 508:4f5903e025e6 | 265 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 125 kHz - 141 kHz |
| mbed_official | 508:4f5903e025e6 | 266 | } else if ((hz >= 250000) && (hz < 500000)) { |
| mbed_official | 508:4f5903e025e6 | 267 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 250 kHz - 280 kHz |
| mbed_official | 508:4f5903e025e6 | 268 | } else if ((hz >= 500000) && (hz < 1000000)) { |
| mbed_official | 508:4f5903e025e6 | 269 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 500 kHz - 560 kHz |
| mbed_official | 508:4f5903e025e6 | 270 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
| mbed_official | 508:4f5903e025e6 | 271 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1 MHz - 1.13 MHz |
| mbed_official | 508:4f5903e025e6 | 272 | } else if ((hz >= 2000000) && (hz < 4000000)) { |
| mbed_official | 508:4f5903e025e6 | 273 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 2 MHz - 2.25 MHz |
| mbed_official | 508:4f5903e025e6 | 274 | } else if ((hz >= 4000000) && (hz < 8000000)) { |
| mbed_official | 508:4f5903e025e6 | 275 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 4 MHz - 4.5 MHz |
| mbed_official | 508:4f5903e025e6 | 276 | } else if ((hz >= 8000000) && (hz < 16000000)) { |
| mbed_official | 508:4f5903e025e6 | 277 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 8 MHz - 9 MHz |
| mbed_official | 508:4f5903e025e6 | 278 | } else { // >= 16000000 |
| mbed_official | 508:4f5903e025e6 | 279 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 16 MHz - 18 MHz |
| mbed_official | 508:4f5903e025e6 | 280 | } |
| mbed_official | 508:4f5903e025e6 | 281 | } |
| mbed_official | 508:4f5903e025e6 | 282 | #endif |
| mbed_official | 508:4f5903e025e6 | 283 | |
| mbed_official | 508:4f5903e025e6 | 284 | init_spi(obj); |
| mbed_official | 508:4f5903e025e6 | 285 | } |
| mbed_official | 508:4f5903e025e6 | 286 | |
| mbed_official | 508:4f5903e025e6 | 287 | static inline int ssp_readable(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 288 | { |
| mbed_official | 508:4f5903e025e6 | 289 | int status; |
| mbed_official | 508:4f5903e025e6 | 290 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 291 | // Check if data is received |
| mbed_official | 508:4f5903e025e6 | 292 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0); |
| mbed_official | 508:4f5903e025e6 | 293 | return status; |
| mbed_official | 508:4f5903e025e6 | 294 | } |
| mbed_official | 508:4f5903e025e6 | 295 | |
| mbed_official | 508:4f5903e025e6 | 296 | static inline int ssp_writeable(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 297 | { |
| mbed_official | 508:4f5903e025e6 | 298 | int status; |
| mbed_official | 508:4f5903e025e6 | 299 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 300 | // Check if data is transmitted |
| mbed_official | 508:4f5903e025e6 | 301 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0); |
| mbed_official | 508:4f5903e025e6 | 302 | return status; |
| mbed_official | 508:4f5903e025e6 | 303 | } |
| mbed_official | 508:4f5903e025e6 | 304 | |
| mbed_official | 508:4f5903e025e6 | 305 | static inline void ssp_write(spi_t *obj, int value) |
| mbed_official | 508:4f5903e025e6 | 306 | { |
| mbed_official | 508:4f5903e025e6 | 307 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 308 | while (!ssp_writeable(obj)); |
| mbed_official | 508:4f5903e025e6 | 309 | if (obj->bits == SPI_DATASIZE_8BIT) { |
| mbed_official | 508:4f5903e025e6 | 310 | // Force 8-bit access to the data register |
| mbed_official | 508:4f5903e025e6 | 311 | uint8_t *p_spi_dr = 0; |
| mbed_official | 508:4f5903e025e6 | 312 | p_spi_dr = (uint8_t *) & (spi->DR); |
| mbed_official | 508:4f5903e025e6 | 313 | *p_spi_dr = (uint8_t)value; |
| mbed_official | 508:4f5903e025e6 | 314 | } else { // SPI_DATASIZE_16BIT |
| mbed_official | 508:4f5903e025e6 | 315 | spi->DR = (uint16_t)value; |
| mbed_official | 508:4f5903e025e6 | 316 | } |
| mbed_official | 508:4f5903e025e6 | 317 | } |
| mbed_official | 508:4f5903e025e6 | 318 | |
| mbed_official | 508:4f5903e025e6 | 319 | static inline int ssp_read(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 320 | { |
| mbed_official | 508:4f5903e025e6 | 321 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 322 | while (!ssp_readable(obj)); |
| mbed_official | 508:4f5903e025e6 | 323 | if (obj->bits == SPI_DATASIZE_8BIT) { |
| mbed_official | 508:4f5903e025e6 | 324 | // Force 8-bit access to the data register |
| mbed_official | 508:4f5903e025e6 | 325 | uint8_t *p_spi_dr = 0; |
| mbed_official | 508:4f5903e025e6 | 326 | p_spi_dr = (uint8_t *) & (spi->DR); |
| mbed_official | 508:4f5903e025e6 | 327 | return (int)(*p_spi_dr); |
| mbed_official | 508:4f5903e025e6 | 328 | } else { |
| mbed_official | 508:4f5903e025e6 | 329 | return (int)spi->DR; |
| mbed_official | 508:4f5903e025e6 | 330 | } |
| mbed_official | 508:4f5903e025e6 | 331 | } |
| mbed_official | 508:4f5903e025e6 | 332 | |
| mbed_official | 508:4f5903e025e6 | 333 | static inline int ssp_busy(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 334 | { |
| mbed_official | 508:4f5903e025e6 | 335 | int status; |
| mbed_official | 508:4f5903e025e6 | 336 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 337 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0); |
| mbed_official | 508:4f5903e025e6 | 338 | return status; |
| mbed_official | 508:4f5903e025e6 | 339 | } |
| mbed_official | 508:4f5903e025e6 | 340 | |
| mbed_official | 508:4f5903e025e6 | 341 | int spi_master_write(spi_t *obj, int value) |
| mbed_official | 508:4f5903e025e6 | 342 | { |
| mbed_official | 508:4f5903e025e6 | 343 | ssp_write(obj, value); |
| mbed_official | 508:4f5903e025e6 | 344 | return ssp_read(obj); |
| mbed_official | 508:4f5903e025e6 | 345 | } |
| mbed_official | 508:4f5903e025e6 | 346 | |
| mbed_official | 508:4f5903e025e6 | 347 | int spi_slave_receive(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 348 | { |
| mbed_official | 508:4f5903e025e6 | 349 | return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0); |
| mbed_official | 508:4f5903e025e6 | 350 | }; |
| mbed_official | 508:4f5903e025e6 | 351 | |
| mbed_official | 508:4f5903e025e6 | 352 | int spi_slave_read(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 353 | { |
| mbed_official | 508:4f5903e025e6 | 354 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 355 | while (!ssp_readable(obj)); |
| mbed_official | 508:4f5903e025e6 | 356 | if (obj->bits == SPI_DATASIZE_8BIT) { |
| mbed_official | 508:4f5903e025e6 | 357 | // Force 8-bit access to the data register |
| mbed_official | 508:4f5903e025e6 | 358 | uint8_t *p_spi_dr = 0; |
| mbed_official | 508:4f5903e025e6 | 359 | p_spi_dr = (uint8_t *) & (spi->DR); |
| mbed_official | 508:4f5903e025e6 | 360 | return (int)(*p_spi_dr); |
| mbed_official | 508:4f5903e025e6 | 361 | } else { |
| mbed_official | 508:4f5903e025e6 | 362 | return (int)spi->DR; |
| mbed_official | 508:4f5903e025e6 | 363 | } |
| mbed_official | 508:4f5903e025e6 | 364 | } |
| mbed_official | 508:4f5903e025e6 | 365 | |
| mbed_official | 508:4f5903e025e6 | 366 | void spi_slave_write(spi_t *obj, int value) |
| mbed_official | 508:4f5903e025e6 | 367 | { |
| mbed_official | 508:4f5903e025e6 | 368 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 508:4f5903e025e6 | 369 | while (!ssp_writeable(obj)); |
| mbed_official | 508:4f5903e025e6 | 370 | if (obj->bits == SPI_DATASIZE_8BIT) { |
| mbed_official | 508:4f5903e025e6 | 371 | // Force 8-bit access to the data register |
| mbed_official | 508:4f5903e025e6 | 372 | uint8_t *p_spi_dr = 0; |
| mbed_official | 508:4f5903e025e6 | 373 | p_spi_dr = (uint8_t *) & (spi->DR); |
| mbed_official | 508:4f5903e025e6 | 374 | *p_spi_dr = (uint8_t)value; |
| mbed_official | 508:4f5903e025e6 | 375 | } else { // SPI_DATASIZE_16BIT |
| mbed_official | 508:4f5903e025e6 | 376 | spi->DR = (uint16_t)value; |
| mbed_official | 508:4f5903e025e6 | 377 | } |
| mbed_official | 508:4f5903e025e6 | 378 | } |
| mbed_official | 508:4f5903e025e6 | 379 | |
| mbed_official | 508:4f5903e025e6 | 380 | int spi_busy(spi_t *obj) |
| mbed_official | 508:4f5903e025e6 | 381 | { |
| mbed_official | 508:4f5903e025e6 | 382 | return ssp_busy(obj); |
| mbed_official | 508:4f5903e025e6 | 383 | } |
| mbed_official | 508:4f5903e025e6 | 384 | |
| mbed_official | 508:4f5903e025e6 | 385 | #endif |