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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_STM/TARGET_STM32F4/spi_api.c@613:bc40b8d2aec4, 2015-08-20 (annotated)
- Committer:
- mbed_official
- Date:
- Thu Aug 20 10:45:13 2015 +0100
- Revision:
- 613:bc40b8d2aec4
- Parent:
- 552:a1b9575155a3
Synchronized with git revision 92ca8c7b60a283b6bb60eb65b183dac1599f0ade
Full URL: https://github.com/mbedmicro/mbed/commit/92ca8c7b60a283b6bb60eb65b183dac1599f0ade/
Nordic: update application start address in GCC linker script
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 442:d916d321e60f | 1 | /* mbed Microcontroller Library |
| mbed_official | 442:d916d321e60f | 2 | ******************************************************************************* |
| mbed_official | 613:bc40b8d2aec4 | 3 | * Copyright (c) 2015, STMicroelectronics |
| mbed_official | 442:d916d321e60f | 4 | * All rights reserved. |
| mbed_official | 442:d916d321e60f | 5 | * |
| mbed_official | 442:d916d321e60f | 6 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 442:d916d321e60f | 7 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 442:d916d321e60f | 8 | * |
| mbed_official | 442:d916d321e60f | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 442:d916d321e60f | 10 | * this list of conditions and the following disclaimer. |
| mbed_official | 442:d916d321e60f | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 442:d916d321e60f | 12 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 442:d916d321e60f | 13 | * and/or other materials provided with the distribution. |
| mbed_official | 442:d916d321e60f | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| mbed_official | 442:d916d321e60f | 15 | * may be used to endorse or promote products derived from this software |
| mbed_official | 442:d916d321e60f | 16 | * without specific prior written permission. |
| mbed_official | 442:d916d321e60f | 17 | * |
| mbed_official | 442:d916d321e60f | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| mbed_official | 442:d916d321e60f | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| mbed_official | 442:d916d321e60f | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| mbed_official | 442:d916d321e60f | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| mbed_official | 442:d916d321e60f | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 442:d916d321e60f | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| mbed_official | 442:d916d321e60f | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| mbed_official | 442:d916d321e60f | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| mbed_official | 442:d916d321e60f | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| mbed_official | 442:d916d321e60f | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 442:d916d321e60f | 28 | ******************************************************************************* |
| mbed_official | 442:d916d321e60f | 29 | */ |
| mbed_official | 442:d916d321e60f | 30 | #include "mbed_assert.h" |
| mbed_official | 442:d916d321e60f | 31 | #include "spi_api.h" |
| mbed_official | 442:d916d321e60f | 32 | |
| mbed_official | 442:d916d321e60f | 33 | #if DEVICE_SPI |
| mbed_official | 442:d916d321e60f | 34 | |
| mbed_official | 442:d916d321e60f | 35 | #include <math.h> |
| mbed_official | 442:d916d321e60f | 36 | #include "cmsis.h" |
| mbed_official | 442:d916d321e60f | 37 | #include "pinmap.h" |
| mbed_official | 442:d916d321e60f | 38 | #include "PeripheralPins.h" |
| mbed_official | 613:bc40b8d2aec4 | 39 | #include "mbed_error.h" |
| mbed_official | 442:d916d321e60f | 40 | |
| mbed_official | 442:d916d321e60f | 41 | static SPI_HandleTypeDef SpiHandle; |
| mbed_official | 442:d916d321e60f | 42 | |
| mbed_official | 442:d916d321e60f | 43 | static void init_spi(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 44 | { |
| mbed_official | 442:d916d321e60f | 45 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 46 | |
| mbed_official | 442:d916d321e60f | 47 | __HAL_SPI_DISABLE(&SpiHandle); |
| mbed_official | 442:d916d321e60f | 48 | |
| mbed_official | 442:d916d321e60f | 49 | SpiHandle.Init.Mode = obj->mode; |
| mbed_official | 442:d916d321e60f | 50 | SpiHandle.Init.BaudRatePrescaler = obj->br_presc; |
| mbed_official | 442:d916d321e60f | 51 | SpiHandle.Init.Direction = SPI_DIRECTION_2LINES; |
| mbed_official | 442:d916d321e60f | 52 | SpiHandle.Init.CLKPhase = obj->cpha; |
| mbed_official | 442:d916d321e60f | 53 | SpiHandle.Init.CLKPolarity = obj->cpol; |
| mbed_official | 442:d916d321e60f | 54 | SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED; |
| mbed_official | 442:d916d321e60f | 55 | SpiHandle.Init.CRCPolynomial = 7; |
| mbed_official | 442:d916d321e60f | 56 | SpiHandle.Init.DataSize = obj->bits; |
| mbed_official | 442:d916d321e60f | 57 | SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB; |
| mbed_official | 442:d916d321e60f | 58 | SpiHandle.Init.NSS = obj->nss; |
| mbed_official | 442:d916d321e60f | 59 | SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED; |
| mbed_official | 442:d916d321e60f | 60 | |
| mbed_official | 613:bc40b8d2aec4 | 61 | if (HAL_SPI_Init(&SpiHandle) != HAL_OK) { |
| mbed_official | 613:bc40b8d2aec4 | 62 | error("Cannot initialize SPI"); |
| mbed_official | 613:bc40b8d2aec4 | 63 | } |
| mbed_official | 442:d916d321e60f | 64 | |
| mbed_official | 442:d916d321e60f | 65 | __HAL_SPI_ENABLE(&SpiHandle); |
| mbed_official | 442:d916d321e60f | 66 | } |
| mbed_official | 442:d916d321e60f | 67 | |
| mbed_official | 442:d916d321e60f | 68 | void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel) |
| mbed_official | 442:d916d321e60f | 69 | { |
| mbed_official | 442:d916d321e60f | 70 | // Determine the SPI to use |
| mbed_official | 442:d916d321e60f | 71 | SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI); |
| mbed_official | 442:d916d321e60f | 72 | SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO); |
| mbed_official | 442:d916d321e60f | 73 | SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK); |
| mbed_official | 442:d916d321e60f | 74 | SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL); |
| mbed_official | 442:d916d321e60f | 75 | |
| mbed_official | 442:d916d321e60f | 76 | SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso); |
| mbed_official | 442:d916d321e60f | 77 | SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel); |
| mbed_official | 442:d916d321e60f | 78 | |
| mbed_official | 442:d916d321e60f | 79 | obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl); |
| mbed_official | 442:d916d321e60f | 80 | MBED_ASSERT(obj->spi != (SPIName)NC); |
| mbed_official | 442:d916d321e60f | 81 | |
| mbed_official | 442:d916d321e60f | 82 | // Enable SPI clock |
| mbed_official | 442:d916d321e60f | 83 | if (obj->spi == SPI_1) { |
| mbed_official | 613:bc40b8d2aec4 | 84 | __HAL_RCC_SPI1_CLK_ENABLE(); |
| mbed_official | 442:d916d321e60f | 85 | } |
| mbed_official | 442:d916d321e60f | 86 | |
| mbed_official | 442:d916d321e60f | 87 | if (obj->spi == SPI_2) { |
| mbed_official | 613:bc40b8d2aec4 | 88 | __HAL_RCC_SPI2_CLK_ENABLE(); |
| mbed_official | 442:d916d321e60f | 89 | } |
| mbed_official | 442:d916d321e60f | 90 | |
| mbed_official | 442:d916d321e60f | 91 | if (obj->spi == SPI_3) { |
| mbed_official | 613:bc40b8d2aec4 | 92 | __HAL_RCC_SPI3_CLK_ENABLE(); |
| mbed_official | 442:d916d321e60f | 93 | } |
| mbed_official | 442:d916d321e60f | 94 | |
| mbed_official | 442:d916d321e60f | 95 | #if defined SPI4_BASE |
| mbed_official | 442:d916d321e60f | 96 | if (obj->spi == SPI_4) { |
| mbed_official | 613:bc40b8d2aec4 | 97 | __HAL_RCC_SPI4_CLK_ENABLE(); |
| mbed_official | 442:d916d321e60f | 98 | } |
| mbed_official | 442:d916d321e60f | 99 | #endif |
| mbed_official | 442:d916d321e60f | 100 | |
| mbed_official | 442:d916d321e60f | 101 | #if defined SPI5_BASE |
| mbed_official | 442:d916d321e60f | 102 | if (obj->spi == SPI_5) { |
| mbed_official | 613:bc40b8d2aec4 | 103 | __HAL_RCC_SPI5_CLK_ENABLE(); |
| mbed_official | 442:d916d321e60f | 104 | } |
| mbed_official | 442:d916d321e60f | 105 | #endif |
| mbed_official | 442:d916d321e60f | 106 | |
| mbed_official | 442:d916d321e60f | 107 | // Configure the SPI pins |
| mbed_official | 442:d916d321e60f | 108 | pinmap_pinout(mosi, PinMap_SPI_MOSI); |
| mbed_official | 442:d916d321e60f | 109 | pinmap_pinout(miso, PinMap_SPI_MISO); |
| mbed_official | 442:d916d321e60f | 110 | pinmap_pinout(sclk, PinMap_SPI_SCLK); |
| mbed_official | 442:d916d321e60f | 111 | |
| mbed_official | 442:d916d321e60f | 112 | // Save new values |
| mbed_official | 442:d916d321e60f | 113 | obj->bits = SPI_DATASIZE_8BIT; |
| mbed_official | 442:d916d321e60f | 114 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 442:d916d321e60f | 115 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 442:d916d321e60f | 116 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; |
| mbed_official | 442:d916d321e60f | 117 | |
| mbed_official | 442:d916d321e60f | 118 | obj->pin_miso = miso; |
| mbed_official | 442:d916d321e60f | 119 | obj->pin_mosi = mosi; |
| mbed_official | 442:d916d321e60f | 120 | obj->pin_sclk = sclk; |
| mbed_official | 442:d916d321e60f | 121 | obj->pin_ssel = ssel; |
| mbed_official | 442:d916d321e60f | 122 | |
| mbed_official | 552:a1b9575155a3 | 123 | if (ssel != NC) { |
| mbed_official | 552:a1b9575155a3 | 124 | pinmap_pinout(ssel, PinMap_SPI_SSEL); |
| mbed_official | 552:a1b9575155a3 | 125 | } else { |
| mbed_official | 442:d916d321e60f | 126 | obj->nss = SPI_NSS_SOFT; |
| mbed_official | 442:d916d321e60f | 127 | } |
| mbed_official | 442:d916d321e60f | 128 | |
| mbed_official | 442:d916d321e60f | 129 | init_spi(obj); |
| mbed_official | 442:d916d321e60f | 130 | } |
| mbed_official | 442:d916d321e60f | 131 | |
| mbed_official | 442:d916d321e60f | 132 | void spi_free(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 133 | { |
| mbed_official | 442:d916d321e60f | 134 | // Reset SPI and disable clock |
| mbed_official | 442:d916d321e60f | 135 | if (obj->spi == SPI_1) { |
| mbed_official | 613:bc40b8d2aec4 | 136 | __HAL_RCC_SPI1_FORCE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 137 | __HAL_RCC_SPI1_RELEASE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 138 | __HAL_RCC_SPI1_CLK_DISABLE(); |
| mbed_official | 442:d916d321e60f | 139 | } |
| mbed_official | 442:d916d321e60f | 140 | |
| mbed_official | 442:d916d321e60f | 141 | if (obj->spi == SPI_2) { |
| mbed_official | 613:bc40b8d2aec4 | 142 | __HAL_RCC_SPI2_FORCE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 143 | __HAL_RCC_SPI2_RELEASE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 144 | __HAL_RCC_SPI2_CLK_DISABLE(); |
| mbed_official | 442:d916d321e60f | 145 | } |
| mbed_official | 442:d916d321e60f | 146 | |
| mbed_official | 442:d916d321e60f | 147 | if (obj->spi == SPI_3) { |
| mbed_official | 613:bc40b8d2aec4 | 148 | __HAL_RCC_SPI3_FORCE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 149 | __HAL_RCC_SPI3_RELEASE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 150 | __HAL_RCC_SPI3_CLK_DISABLE(); |
| mbed_official | 442:d916d321e60f | 151 | } |
| mbed_official | 442:d916d321e60f | 152 | |
| mbed_official | 442:d916d321e60f | 153 | #if defined SPI4_BASE |
| mbed_official | 442:d916d321e60f | 154 | if (obj->spi == SPI_4) { |
| mbed_official | 613:bc40b8d2aec4 | 155 | __HAL_RCC_SPI4_FORCE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 156 | __HAL_RCC_SPI4_RELEASE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 157 | __HAL_RCC_SPI4_CLK_DISABLE(); |
| mbed_official | 442:d916d321e60f | 158 | } |
| mbed_official | 442:d916d321e60f | 159 | #endif |
| mbed_official | 442:d916d321e60f | 160 | |
| mbed_official | 442:d916d321e60f | 161 | #if defined SPI5_BASE |
| mbed_official | 442:d916d321e60f | 162 | if (obj->spi == SPI_5) { |
| mbed_official | 613:bc40b8d2aec4 | 163 | __HAL_RCC_SPI5_FORCE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 164 | __HAL_RCC_SPI5_RELEASE_RESET(); |
| mbed_official | 613:bc40b8d2aec4 | 165 | __HAL_RCC_SPI5_CLK_DISABLE(); |
| mbed_official | 442:d916d321e60f | 166 | } |
| mbed_official | 442:d916d321e60f | 167 | #endif |
| mbed_official | 442:d916d321e60f | 168 | |
| mbed_official | 442:d916d321e60f | 169 | // Configure GPIOs |
| mbed_official | 442:d916d321e60f | 170 | pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 442:d916d321e60f | 171 | pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 442:d916d321e60f | 172 | pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 442:d916d321e60f | 173 | pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
| mbed_official | 442:d916d321e60f | 174 | } |
| mbed_official | 442:d916d321e60f | 175 | |
| mbed_official | 442:d916d321e60f | 176 | void spi_format(spi_t *obj, int bits, int mode, int slave) |
| mbed_official | 442:d916d321e60f | 177 | { |
| mbed_official | 442:d916d321e60f | 178 | // Save new values |
| mbed_official | 442:d916d321e60f | 179 | if (bits == 16) { |
| mbed_official | 442:d916d321e60f | 180 | obj->bits = SPI_DATASIZE_16BIT; |
| mbed_official | 442:d916d321e60f | 181 | } else { |
| mbed_official | 442:d916d321e60f | 182 | obj->bits = SPI_DATASIZE_8BIT; |
| mbed_official | 442:d916d321e60f | 183 | } |
| mbed_official | 442:d916d321e60f | 184 | |
| mbed_official | 442:d916d321e60f | 185 | switch (mode) { |
| mbed_official | 442:d916d321e60f | 186 | case 0: |
| mbed_official | 442:d916d321e60f | 187 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 442:d916d321e60f | 188 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 442:d916d321e60f | 189 | break; |
| mbed_official | 442:d916d321e60f | 190 | case 1: |
| mbed_official | 442:d916d321e60f | 191 | obj->cpol = SPI_POLARITY_LOW; |
| mbed_official | 442:d916d321e60f | 192 | obj->cpha = SPI_PHASE_2EDGE; |
| mbed_official | 442:d916d321e60f | 193 | break; |
| mbed_official | 442:d916d321e60f | 194 | case 2: |
| mbed_official | 442:d916d321e60f | 195 | obj->cpol = SPI_POLARITY_HIGH; |
| mbed_official | 442:d916d321e60f | 196 | obj->cpha = SPI_PHASE_1EDGE; |
| mbed_official | 442:d916d321e60f | 197 | break; |
| mbed_official | 442:d916d321e60f | 198 | default: |
| mbed_official | 442:d916d321e60f | 199 | obj->cpol = SPI_POLARITY_HIGH; |
| mbed_official | 442:d916d321e60f | 200 | obj->cpha = SPI_PHASE_2EDGE; |
| mbed_official | 442:d916d321e60f | 201 | break; |
| mbed_official | 442:d916d321e60f | 202 | } |
| mbed_official | 442:d916d321e60f | 203 | |
| mbed_official | 552:a1b9575155a3 | 204 | if (obj->nss != SPI_NSS_SOFT) { |
| mbed_official | 552:a1b9575155a3 | 205 | obj->nss = (slave) ? SPI_NSS_HARD_INPUT : SPI_NSS_HARD_OUTPUT; |
| mbed_official | 442:d916d321e60f | 206 | } |
| mbed_official | 442:d916d321e60f | 207 | |
| mbed_official | 552:a1b9575155a3 | 208 | obj->mode = (slave) ? SPI_MODE_SLAVE : SPI_MODE_MASTER; |
| mbed_official | 552:a1b9575155a3 | 209 | |
| mbed_official | 442:d916d321e60f | 210 | init_spi(obj); |
| mbed_official | 442:d916d321e60f | 211 | } |
| mbed_official | 442:d916d321e60f | 212 | |
| mbed_official | 442:d916d321e60f | 213 | void spi_frequency(spi_t *obj, int hz) |
| mbed_official | 442:d916d321e60f | 214 | { |
| mbed_official | 542:6693aa6d3ba3 | 215 | #if defined(TARGET_STM32F401RE) || defined(TARGET_STM32F401VC) || defined(TARGET_STM32F407VG) |
| mbed_official | 442:d916d321e60f | 216 | // Note: The frequencies are obtained with SPI1 clock = 84 MHz (APB2 clock) |
| mbed_official | 442:d916d321e60f | 217 | if (hz < 600000) { |
| mbed_official | 442:d916d321e60f | 218 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 330 kHz |
| mbed_official | 442:d916d321e60f | 219 | } else if ((hz >= 600000) && (hz < 1000000)) { |
| mbed_official | 442:d916d321e60f | 220 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 656 kHz |
| mbed_official | 442:d916d321e60f | 221 | } else if ((hz >= 1000000) && (hz < 2000000)) { |
| mbed_official | 442:d916d321e60f | 222 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.3 MHz |
| mbed_official | 442:d916d321e60f | 223 | } else if ((hz >= 2000000) && (hz < 5000000)) { |
| mbed_official | 442:d916d321e60f | 224 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.6 MHz |
| mbed_official | 442:d916d321e60f | 225 | } else if ((hz >= 5000000) && (hz < 10000000)) { |
| mbed_official | 442:d916d321e60f | 226 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.25 MHz |
| mbed_official | 442:d916d321e60f | 227 | } else if ((hz >= 10000000) && (hz < 21000000)) { |
| mbed_official | 442:d916d321e60f | 228 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 10.5 MHz |
| mbed_official | 442:d916d321e60f | 229 | } else if ((hz >= 21000000) && (hz < 42000000)) { |
| mbed_official | 442:d916d321e60f | 230 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 21 MHz |
| mbed_official | 442:d916d321e60f | 231 | } else { // >= 42000000 |
| mbed_official | 442:d916d321e60f | 232 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 42 MHz |
| mbed_official | 442:d916d321e60f | 233 | } |
| mbed_official | 442:d916d321e60f | 234 | #elif defined(TARGET_STM32F405RG) |
| mbed_official | 442:d916d321e60f | 235 | // Note: The frequencies are obtained with SPI1 clock = 48 MHz (APB2 clock) |
| mbed_official | 442:d916d321e60f | 236 | if (obj->spi == SPI_1) { |
| mbed_official | 442:d916d321e60f | 237 | if (hz < 375000) { |
| mbed_official | 442:d916d321e60f | 238 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz |
| mbed_official | 442:d916d321e60f | 239 | } else if ((hz >= 375000) && (hz < 750000)) { |
| mbed_official | 442:d916d321e60f | 240 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz |
| mbed_official | 442:d916d321e60f | 241 | } else if ((hz >= 750000) && (hz < 1500000)) { |
| mbed_official | 442:d916d321e60f | 242 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz |
| mbed_official | 442:d916d321e60f | 243 | } else if ((hz >= 1500000) && (hz < 3000000)) { |
| mbed_official | 442:d916d321e60f | 244 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz |
| mbed_official | 442:d916d321e60f | 245 | } else if ((hz >= 3000000) && (hz < 6000000)) { |
| mbed_official | 442:d916d321e60f | 246 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz |
| mbed_official | 442:d916d321e60f | 247 | } else if ((hz >= 6000000) && (hz < 12000000)) { |
| mbed_official | 442:d916d321e60f | 248 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz |
| mbed_official | 442:d916d321e60f | 249 | } else if ((hz >= 12000000) && (hz < 24000000)) { |
| mbed_official | 442:d916d321e60f | 250 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz |
| mbed_official | 442:d916d321e60f | 251 | } else { // >= 24000000 |
| mbed_official | 442:d916d321e60f | 252 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz |
| mbed_official | 442:d916d321e60f | 253 | } |
| mbed_official | 442:d916d321e60f | 254 | // Note: The frequencies are obtained with SPI2/3 clock = 48 MHz (APB1 clock) |
| mbed_official | 442:d916d321e60f | 255 | } else if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) { |
| mbed_official | 442:d916d321e60f | 256 | if (hz < 375000) { |
| mbed_official | 442:d916d321e60f | 257 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 187.5 kHz |
| mbed_official | 442:d916d321e60f | 258 | } else if ((hz >= 375000) && (hz < 750000)) { |
| mbed_official | 442:d916d321e60f | 259 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 375 kHz |
| mbed_official | 442:d916d321e60f | 260 | } else if ((hz >= 750000) && (hz < 1500000)) { |
| mbed_official | 442:d916d321e60f | 261 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 0.75 MHz |
| mbed_official | 442:d916d321e60f | 262 | } else if ((hz >= 1500000) && (hz < 3000000)) { |
| mbed_official | 442:d916d321e60f | 263 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.5 MHz |
| mbed_official | 442:d916d321e60f | 264 | } else if ((hz >= 3000000) && (hz < 6000000)) { |
| mbed_official | 442:d916d321e60f | 265 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3 MHz |
| mbed_official | 442:d916d321e60f | 266 | } else if ((hz >= 6000000) && (hz < 12000000)) { |
| mbed_official | 442:d916d321e60f | 267 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6 MHz |
| mbed_official | 442:d916d321e60f | 268 | } else if ((hz >= 12000000) && (hz < 24000000)) { |
| mbed_official | 442:d916d321e60f | 269 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12 MHz |
| mbed_official | 442:d916d321e60f | 270 | } else { // >= 24000000 |
| mbed_official | 442:d916d321e60f | 271 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 24 MHz |
| mbed_official | 442:d916d321e60f | 272 | } |
| mbed_official | 442:d916d321e60f | 273 | } |
| mbed_official | 442:d916d321e60f | 274 | #elif defined(TARGET_STM32F411RE) || defined(TARGET_STM32F429ZI) |
| mbed_official | 442:d916d321e60f | 275 | // Values depend of PCLK2: 100 MHz |
| mbed_official | 442:d916d321e60f | 276 | if ((obj->spi == SPI_1) || (obj->spi == SPI_4) || (obj->spi == SPI_5)) { |
| mbed_official | 442:d916d321e60f | 277 | if (hz < 700000) { |
| mbed_official | 442:d916d321e60f | 278 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 391 kHz |
| mbed_official | 442:d916d321e60f | 279 | } else if ((hz >= 700000) && (hz < 1000000)) { |
| mbed_official | 442:d916d321e60f | 280 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 781 kHz |
| mbed_official | 442:d916d321e60f | 281 | } else if ((hz >= 1000000) && (hz < 3000000)) { |
| mbed_official | 442:d916d321e60f | 282 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.56 MHz |
| mbed_official | 442:d916d321e60f | 283 | } else if ((hz >= 3000000) && (hz < 6000000)) { |
| mbed_official | 442:d916d321e60f | 284 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 3.13 MHz |
| mbed_official | 442:d916d321e60f | 285 | } else if ((hz >= 6000000) && (hz < 12000000)) { |
| mbed_official | 442:d916d321e60f | 286 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 6.25 MHz |
| mbed_official | 442:d916d321e60f | 287 | } else if ((hz >= 12000000) && (hz < 25000000)) { |
| mbed_official | 442:d916d321e60f | 288 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 12.5 MHz |
| mbed_official | 442:d916d321e60f | 289 | } else if ((hz >= 25000000) && (hz < 50000000)) { |
| mbed_official | 442:d916d321e60f | 290 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 25 MHz |
| mbed_official | 442:d916d321e60f | 291 | } else { // >= 50000000 |
| mbed_official | 442:d916d321e60f | 292 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 50 MHz |
| mbed_official | 442:d916d321e60f | 293 | } |
| mbed_official | 442:d916d321e60f | 294 | } |
| mbed_official | 442:d916d321e60f | 295 | // Values depend of PCLK1: 50 MHz |
| mbed_official | 442:d916d321e60f | 296 | if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) { |
| mbed_official | 442:d916d321e60f | 297 | if (hz < 400000) { |
| mbed_official | 442:d916d321e60f | 298 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 195 kHz |
| mbed_official | 442:d916d321e60f | 299 | } else if ((hz >= 400000) && (hz < 700000)) { |
| mbed_official | 442:d916d321e60f | 300 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 391 kHz |
| mbed_official | 442:d916d321e60f | 301 | } else if ((hz >= 700000) && (hz < 1000000)) { |
| mbed_official | 442:d916d321e60f | 302 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 781 MHz |
| mbed_official | 442:d916d321e60f | 303 | } else if ((hz >= 1000000) && (hz < 3000000)) { |
| mbed_official | 442:d916d321e60f | 304 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.56 MHz |
| mbed_official | 442:d916d321e60f | 305 | } else if ((hz >= 3000000) && (hz < 6000000)) { |
| mbed_official | 442:d916d321e60f | 306 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3.13 MHz |
| mbed_official | 442:d916d321e60f | 307 | } else if ((hz >= 6000000) && (hz < 12000000)) { |
| mbed_official | 442:d916d321e60f | 308 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6.25 MHz |
| mbed_official | 442:d916d321e60f | 309 | } else if ((hz >= 12000000) && (hz < 25000000)) { |
| mbed_official | 442:d916d321e60f | 310 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12.5 MHz |
| mbed_official | 442:d916d321e60f | 311 | } else { // >= 25000000 |
| mbed_official | 442:d916d321e60f | 312 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 25 MHz |
| mbed_official | 442:d916d321e60f | 313 | } |
| mbed_official | 442:d916d321e60f | 314 | } |
| mbed_official | 613:bc40b8d2aec4 | 315 | #elif defined(TARGET_STM32F446RE) |
| mbed_official | 613:bc40b8d2aec4 | 316 | // Values depend of PCLK2: 90 MHz |
| mbed_official | 613:bc40b8d2aec4 | 317 | if ((obj->spi == SPI_1) || (obj->spi == SPI_4)) { |
| mbed_official | 613:bc40b8d2aec4 | 318 | if (hz < 700000) { |
| mbed_official | 613:bc40b8d2aec4 | 319 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 352 kHz |
| mbed_official | 613:bc40b8d2aec4 | 320 | } else if ((hz >= 700000) && (hz < 1000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 321 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 703 kHz |
| mbed_official | 613:bc40b8d2aec4 | 322 | } else if ((hz >= 1000000) && (hz < 3000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 323 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.41 MHz |
| mbed_official | 613:bc40b8d2aec4 | 324 | } else if ((hz >= 3000000) && (hz < 5000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 325 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 2.81 MHz |
| mbed_official | 613:bc40b8d2aec4 | 326 | } else if ((hz >= 5000000) && (hz < 11000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 327 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 5.63 MHz |
| mbed_official | 613:bc40b8d2aec4 | 328 | } else if ((hz >= 11000000) && (hz < 22000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 329 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 11.25 MHz |
| mbed_official | 613:bc40b8d2aec4 | 330 | } else if ((hz >= 22000000) && (hz < 45000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 331 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 22.5 MHz |
| mbed_official | 613:bc40b8d2aec4 | 332 | } else { // >= 45000000 |
| mbed_official | 613:bc40b8d2aec4 | 333 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 45 MHz |
| mbed_official | 613:bc40b8d2aec4 | 334 | } |
| mbed_official | 613:bc40b8d2aec4 | 335 | } |
| mbed_official | 613:bc40b8d2aec4 | 336 | // Values depend of PCLK1: 45 MHz |
| mbed_official | 613:bc40b8d2aec4 | 337 | if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) { |
| mbed_official | 613:bc40b8d2aec4 | 338 | if (hz < 350000) { |
| mbed_official | 613:bc40b8d2aec4 | 339 | obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 176 kHz |
| mbed_official | 613:bc40b8d2aec4 | 340 | } else if ((hz >= 350000) && (hz < 700000)) { |
| mbed_official | 613:bc40b8d2aec4 | 341 | obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 352 kHz |
| mbed_official | 613:bc40b8d2aec4 | 342 | } else if ((hz >= 700000) && (hz < 1000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 343 | obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 703 kHz |
| mbed_official | 613:bc40b8d2aec4 | 344 | } else if ((hz >= 1000000) && (hz < 3000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 345 | obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.41 MHz |
| mbed_official | 613:bc40b8d2aec4 | 346 | } else if ((hz >= 3000000) && (hz < 5000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 347 | obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 2.81 MHz |
| mbed_official | 613:bc40b8d2aec4 | 348 | } else if ((hz >= 5000000) && (hz < 11000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 349 | obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 5.63 MHz |
| mbed_official | 613:bc40b8d2aec4 | 350 | } else if ((hz >= 11000000) && (hz < 22000000)) { |
| mbed_official | 613:bc40b8d2aec4 | 351 | obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 11.25 MHz |
| mbed_official | 613:bc40b8d2aec4 | 352 | } else { // >= 22000000 |
| mbed_official | 613:bc40b8d2aec4 | 353 | obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 22.5 MHz |
| mbed_official | 613:bc40b8d2aec4 | 354 | } |
| mbed_official | 613:bc40b8d2aec4 | 355 | } |
| mbed_official | 442:d916d321e60f | 356 | #endif |
| mbed_official | 442:d916d321e60f | 357 | init_spi(obj); |
| mbed_official | 442:d916d321e60f | 358 | } |
| mbed_official | 442:d916d321e60f | 359 | |
| mbed_official | 442:d916d321e60f | 360 | static inline int ssp_readable(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 361 | { |
| mbed_official | 442:d916d321e60f | 362 | int status; |
| mbed_official | 442:d916d321e60f | 363 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 364 | // Check if data is received |
| mbed_official | 442:d916d321e60f | 365 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0); |
| mbed_official | 442:d916d321e60f | 366 | return status; |
| mbed_official | 442:d916d321e60f | 367 | } |
| mbed_official | 442:d916d321e60f | 368 | |
| mbed_official | 442:d916d321e60f | 369 | static inline int ssp_writeable(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 370 | { |
| mbed_official | 442:d916d321e60f | 371 | int status; |
| mbed_official | 442:d916d321e60f | 372 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 373 | // Check if data is transmitted |
| mbed_official | 442:d916d321e60f | 374 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0); |
| mbed_official | 442:d916d321e60f | 375 | return status; |
| mbed_official | 442:d916d321e60f | 376 | } |
| mbed_official | 442:d916d321e60f | 377 | |
| mbed_official | 442:d916d321e60f | 378 | static inline void ssp_write(spi_t *obj, int value) |
| mbed_official | 442:d916d321e60f | 379 | { |
| mbed_official | 442:d916d321e60f | 380 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 381 | while (!ssp_writeable(obj)); |
| mbed_official | 442:d916d321e60f | 382 | spi->DR = (uint16_t)value; |
| mbed_official | 442:d916d321e60f | 383 | } |
| mbed_official | 442:d916d321e60f | 384 | |
| mbed_official | 442:d916d321e60f | 385 | static inline int ssp_read(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 386 | { |
| mbed_official | 442:d916d321e60f | 387 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 388 | while (!ssp_readable(obj)); |
| mbed_official | 442:d916d321e60f | 389 | return (int)spi->DR; |
| mbed_official | 442:d916d321e60f | 390 | } |
| mbed_official | 442:d916d321e60f | 391 | |
| mbed_official | 442:d916d321e60f | 392 | static inline int ssp_busy(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 393 | { |
| mbed_official | 442:d916d321e60f | 394 | int status; |
| mbed_official | 442:d916d321e60f | 395 | SpiHandle.Instance = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 396 | status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0); |
| mbed_official | 442:d916d321e60f | 397 | return status; |
| mbed_official | 442:d916d321e60f | 398 | } |
| mbed_official | 442:d916d321e60f | 399 | |
| mbed_official | 442:d916d321e60f | 400 | int spi_master_write(spi_t *obj, int value) |
| mbed_official | 442:d916d321e60f | 401 | { |
| mbed_official | 442:d916d321e60f | 402 | ssp_write(obj, value); |
| mbed_official | 442:d916d321e60f | 403 | return ssp_read(obj); |
| mbed_official | 442:d916d321e60f | 404 | } |
| mbed_official | 442:d916d321e60f | 405 | |
| mbed_official | 442:d916d321e60f | 406 | int spi_slave_receive(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 407 | { |
| mbed_official | 442:d916d321e60f | 408 | return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0); |
| mbed_official | 442:d916d321e60f | 409 | }; |
| mbed_official | 442:d916d321e60f | 410 | |
| mbed_official | 442:d916d321e60f | 411 | int spi_slave_read(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 412 | { |
| mbed_official | 442:d916d321e60f | 413 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 414 | while (!ssp_readable(obj)); |
| mbed_official | 442:d916d321e60f | 415 | return (int)spi->DR; |
| mbed_official | 442:d916d321e60f | 416 | } |
| mbed_official | 442:d916d321e60f | 417 | |
| mbed_official | 442:d916d321e60f | 418 | void spi_slave_write(spi_t *obj, int value) |
| mbed_official | 442:d916d321e60f | 419 | { |
| mbed_official | 442:d916d321e60f | 420 | SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi); |
| mbed_official | 442:d916d321e60f | 421 | while (!ssp_writeable(obj)); |
| mbed_official | 442:d916d321e60f | 422 | spi->DR = (uint16_t)value; |
| mbed_official | 442:d916d321e60f | 423 | } |
| mbed_official | 442:d916d321e60f | 424 | |
| mbed_official | 442:d916d321e60f | 425 | int spi_busy(spi_t *obj) |
| mbed_official | 442:d916d321e60f | 426 | { |
| mbed_official | 442:d916d321e60f | 427 | return ssp_busy(obj); |
| mbed_official | 442:d916d321e60f | 428 | } |
| mbed_official | 442:d916d321e60f | 429 | |
| mbed_official | 442:d916d321e60f | 430 | #endif |
