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mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/spi_api.c
- Revision:
- 235:685d5f11838f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/spi_api.c Mon Jun 23 14:00:09 2014 +0100
@@ -0,0 +1,366 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2014, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#include "mbed_assert.h"
+#include "spi_api.h"
+
+#if DEVICE_SPI
+
+#include <math.h>
+#include "cmsis.h"
+#include "pinmap.h"
+
+static const PinMap PinMap_SPI_MOSI[] = {
+ {PA_1, SPI_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI4)},
+ {PA_7, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // ARDUINO
+ {PA_10, SPI_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI5)},
+// {PB_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
+ {PB_5, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {PB_8, SPI_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI5)},
+ {PB_15, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_3, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_12, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_SPI_MISO[] = {
+ {PA_6, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // ARDUINO
+ {PA_11, SPI_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI4)},
+ {PA_12, SPI_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI5)},
+// {PB_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
+ {PB_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {PB_14, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_2, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_11, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_SPI_SCLK[] = {
+ {PA_5, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)}, // ARDUINO
+ {PB_0, SPI_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI5)},
+// {PB_3, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI1)},
+ {PB_3, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {PB_10, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PB_12, SPI_3, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, GPIO_AF7_SPI3)}, // Warning: also on NSS
+ {PB_13, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PB_13, SPI_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI4)},
+ {PC_7, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PC_10, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_SPI_SSEL[] = {
+ {PA_4, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+// {PA_4, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)},
+ {PA_15, SPI_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI1)},
+// {PA_15, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI3)},
+ {PB_1, SPI_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI5)},
+ {PB_9, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)},
+ {PB_12, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF5_SPI2)}, // Warning: also on SCLK
+// {PB_12, SPI_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_NOPULL, GPIO_AF6_SPI4)}, // Warning: also on SCLK
+ {NC, NC, 0}
+};
+
+static SPI_HandleTypeDef SpiHandle;
+
+static void init_spi(spi_t *obj)
+{
+ SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
+
+ __HAL_SPI_DISABLE(&SpiHandle);
+
+ SpiHandle.Init.Mode = obj->mode;
+ SpiHandle.Init.BaudRatePrescaler = obj->br_presc;
+ SpiHandle.Init.Direction = SPI_DIRECTION_2LINES;
+ SpiHandle.Init.CLKPhase = obj->cpha;
+ SpiHandle.Init.CLKPolarity = obj->cpol;
+ SpiHandle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
+ SpiHandle.Init.CRCPolynomial = 7;
+ SpiHandle.Init.DataSize = obj->bits;
+ SpiHandle.Init.FirstBit = SPI_FIRSTBIT_MSB;
+ SpiHandle.Init.NSS = obj->nss;
+ SpiHandle.Init.TIMode = SPI_TIMODE_DISABLED;
+
+ HAL_SPI_Init(&SpiHandle);
+
+ __HAL_SPI_ENABLE(&SpiHandle);
+}
+
+void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
+{
+ // Determine the SPI to use
+ SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
+ SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
+ SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
+ SPIName spi_ssel = (SPIName)pinmap_peripheral(ssel, PinMap_SPI_SSEL);
+
+ SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
+ SPIName spi_cntl = (SPIName)pinmap_merge(spi_sclk, spi_ssel);
+
+ obj->spi = (SPIName)pinmap_merge(spi_data, spi_cntl);
+ MBED_ASSERT(obj->spi != (SPIName)NC);
+
+ // Enable SPI clock
+ if (obj->spi == SPI_1) {
+ __SPI1_CLK_ENABLE();
+ }
+ if (obj->spi == SPI_2) {
+ __SPI2_CLK_ENABLE();
+ }
+ if (obj->spi == SPI_3) {
+ __SPI3_CLK_ENABLE();
+ }
+ if (obj->spi == SPI_4) {
+ __SPI4_CLK_ENABLE();
+ }
+ if (obj->spi == SPI_5) {
+ __SPI5_CLK_ENABLE();
+ }
+
+ // Configure the SPI pins
+ pinmap_pinout(mosi, PinMap_SPI_MOSI);
+ pinmap_pinout(miso, PinMap_SPI_MISO);
+ pinmap_pinout(sclk, PinMap_SPI_SCLK);
+
+ // Save new values
+ obj->bits = SPI_DATASIZE_8BIT;
+ obj->cpol = SPI_POLARITY_LOW;
+ obj->cpha = SPI_PHASE_1EDGE;
+ obj->br_presc = SPI_BAUDRATEPRESCALER_256;
+
+ obj->pin_miso = miso;
+ obj->pin_mosi = mosi;
+ obj->pin_sclk = sclk;
+ obj->pin_ssel = ssel;
+
+ if (ssel == NC) { // SW NSS Master mode
+ obj->mode = SPI_MODE_MASTER;
+ obj->nss = SPI_NSS_SOFT;
+ } else { // Slave
+ pinmap_pinout(ssel, PinMap_SPI_SSEL);
+ obj->mode = SPI_MODE_SLAVE;
+ obj->nss = SPI_NSS_HARD_INPUT;
+ }
+
+ init_spi(obj);
+}
+
+void spi_free(spi_t *obj)
+{
+ // Reset SPI and disable clock
+ if (obj->spi == SPI_1) {
+ __SPI1_FORCE_RESET();
+ __SPI1_RELEASE_RESET();
+ __SPI1_CLK_DISABLE();
+ }
+ if (obj->spi == SPI_2) {
+ __SPI2_FORCE_RESET();
+ __SPI2_RELEASE_RESET();
+ __SPI2_CLK_DISABLE();
+ }
+ if (obj->spi == SPI_3) {
+ __SPI3_FORCE_RESET();
+ __SPI3_RELEASE_RESET();
+ __SPI3_CLK_DISABLE();
+ }
+ if (obj->spi == SPI_4) {
+ __SPI4_FORCE_RESET();
+ __SPI4_RELEASE_RESET();
+ __SPI4_CLK_DISABLE();
+ }
+ if (obj->spi == SPI_5) {
+ __SPI5_FORCE_RESET();
+ __SPI5_RELEASE_RESET();
+ __SPI5_CLK_DISABLE();
+ }
+
+ // Configure GPIOs
+ pin_function(obj->pin_miso, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+ pin_function(obj->pin_mosi, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+ pin_function(obj->pin_sclk, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+ pin_function(obj->pin_ssel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
+}
+
+void spi_format(spi_t *obj, int bits, int mode, int slave)
+{
+ // Save new values
+ if (bits == 16) {
+ obj->bits = SPI_DATASIZE_16BIT;
+ } else {
+ obj->bits = SPI_DATASIZE_8BIT;
+ }
+
+ switch (mode) {
+ case 0:
+ obj->cpol = SPI_POLARITY_LOW;
+ obj->cpha = SPI_PHASE_1EDGE;
+ break;
+ case 1:
+ obj->cpol = SPI_POLARITY_LOW;
+ obj->cpha = SPI_PHASE_2EDGE;
+ break;
+ case 2:
+ obj->cpol = SPI_POLARITY_HIGH;
+ obj->cpha = SPI_PHASE_1EDGE;
+ break;
+ default:
+ obj->cpol = SPI_POLARITY_HIGH;
+ obj->cpha = SPI_PHASE_2EDGE;
+ break;
+ }
+
+ if (slave == 0) {
+ obj->mode = SPI_MODE_MASTER;
+ obj->nss = SPI_NSS_SOFT;
+ } else {
+ obj->mode = SPI_MODE_SLAVE;
+ obj->nss = SPI_NSS_HARD_INPUT;
+ }
+
+ init_spi(obj);
+}
+
+void spi_frequency(spi_t *obj, int hz)
+{
+ // Values depend of PCLK2: 100 MHz
+ if ((obj->spi == SPI_1) || (obj->spi == SPI_4) || (obj->spi == SPI_5)) {
+ if (hz < 700000) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 391 kHz
+ } else if ((hz >= 700000) && (hz < 1000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 781 kHz
+ } else if ((hz >= 1000000) && (hz < 3000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 1.56 MHz
+ } else if ((hz >= 3000000) && (hz < 6000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 3.13 MHz
+ } else if ((hz >= 6000000) && (hz < 12000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 6.25 MHz
+ } else if ((hz >= 12000000) && (hz < 25000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 12.5 MHz
+ } else if ((hz >= 25000000) && (hz < 50000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 25 MHz
+ } else { // >= 50000000
+ obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 50 MHz
+ }
+ }
+
+ // Values depend of PCLK1: 50 MHz
+ if ((obj->spi == SPI_2) || (obj->spi == SPI_3)) {
+ if (hz < 400000) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 195 kHz
+ } else if ((hz >= 400000) && (hz < 700000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 391 kHz
+ } else if ((hz >= 700000) && (hz < 1000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 781 MHz
+ } else if ((hz >= 1000000) && (hz < 3000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1.56 MHz
+ } else if ((hz >= 3000000) && (hz < 6000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 3.13 MHz
+ } else if ((hz >= 6000000) && (hz < 12000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 6.25 MHz
+ } else if ((hz >= 12000000) && (hz < 25000000)) {
+ obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 12.5 MHz
+ } else { // >= 25000000
+ obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 25 MHz
+ }
+ }
+
+ init_spi(obj);
+}
+
+static inline int ssp_readable(spi_t *obj)
+{
+ int status;
+ SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
+ // Check if data is received
+ status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_RXNE) != RESET) ? 1 : 0);
+ return status;
+}
+
+static inline int ssp_writeable(spi_t *obj)
+{
+ int status;
+ SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
+ // Check if data is transmitted
+ status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_TXE) != RESET) ? 1 : 0);
+ return status;
+}
+
+static inline void ssp_write(spi_t *obj, int value)
+{
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ while (!ssp_writeable(obj));
+ spi->DR = (uint16_t)value;
+}
+
+static inline int ssp_read(spi_t *obj)
+{
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ while (!ssp_readable(obj));
+ return (int)spi->DR;
+}
+
+static inline int ssp_busy(spi_t *obj)
+{
+ int status;
+ SpiHandle.Instance = (SPI_TypeDef *)(obj->spi);
+ status = ((__HAL_SPI_GET_FLAG(&SpiHandle, SPI_FLAG_BSY) != RESET) ? 1 : 0);
+ return status;
+}
+
+int spi_master_write(spi_t *obj, int value)
+{
+ ssp_write(obj, value);
+ return ssp_read(obj);
+}
+
+int spi_slave_receive(spi_t *obj)
+{
+ return ((ssp_readable(obj) && !ssp_busy(obj)) ? 1 : 0);
+};
+
+int spi_slave_read(spi_t *obj)
+{
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ while (!ssp_readable(obj));
+ return (int)spi->DR;
+}
+
+void spi_slave_write(spi_t *obj, int value)
+{
+ SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
+ while (!ssp_writeable(obj));
+ spi->DR = (uint16_t)value;
+}
+
+int spi_busy(spi_t *obj)
+{
+ return ssp_busy(obj);
+}
+
+#endif