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[NUCLEO_F302R8] reorg hal part II

pull/1004/head
ohagendorf 2015-03-23 01:37:56 +01:00
parent 42408ce533
commit 5a2cd98407
4 changed files with 0 additions and 913 deletions
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123
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/analogout_api.c
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/* 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 "analogout_api.h"
#if DEVICE_ANALOGOUT
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "PeripheralPins.h"
#define DAC_RANGE (0xFFF) // 12 bits
static DAC_HandleTypeDef DacHandle;
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig;
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
MBED_ASSERT(obj->dac != (DACName)NC);
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
// Enable DAC clock
__DAC1_CLK_ENABLE();
// Configure DAC
DacHandle.Instance = (DAC_TypeDef *)(obj->dac);
sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
analogout_write_u16(obj, 0);
}
void analogout_free(dac_t *obj)
{
// Reset DAC and disable clock
__DAC1_FORCE_RESET();
__DAC1_RELEASE_RESET();
__DAC1_CLK_DISABLE();
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
static inline void dac_write(dac_t *obj, uint16_t value)
{
HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
}
static inline int dac_read(dac_t *obj)
{
return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
}
void analogout_write(dac_t *obj, float value)
{
if (value < 0.0f) {
dac_write(obj, 0); // Min value
} else if (value > 1.0f) {
dac_write(obj, (uint16_t)DAC_RANGE); // Max value
} else {
dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
}
}
void analogout_write_u16(dac_t *obj, uint16_t value)
{
if (value > (uint16_t)DAC_RANGE) {
dac_write(obj, (uint16_t)DAC_RANGE); // Max value
} else {
dac_write(obj, value);
}
}
float analogout_read(dac_t *obj)
{
uint32_t value = dac_read(obj);
return (float)((float)value * (1.0f / (float)DAC_RANGE));
}
uint16_t analogout_read_u16(dac_t *obj)
{
return (uint16_t)dac_read(obj);
}
#endif // DEVICE_ANALOGOUT

139
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/pinmap.c
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/* 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 "pinmap.h"
#include "PortNames.h"
#include "mbed_error.h"
// GPIO mode look-up table
static const uint32_t gpio_mode[13] = {
0x00000000, // 0 = GPIO_MODE_INPUT
0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
0x00000002, // 3 = GPIO_MODE_AF_PP
0x00000012, // 4 = GPIO_MODE_AF_OD
0x00000003, // 5 = GPIO_MODE_ANALOG
0x10110000, // 6 = GPIO_MODE_IT_RISING
0x10210000, // 7 = GPIO_MODE_IT_FALLING
0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
0x10120000, // 9 = GPIO_MODE_EVT_RISING
0x10220000, // 10 = GPIO_MODE_EVT_FALLING
0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
0x10000000 // 12 = Reset IT and EVT (not in STM32Cube HAL)
};
// Enable GPIO clock and return GPIO base address
uint32_t Set_GPIO_Clock(uint32_t port_idx)
{
uint32_t gpio_add = 0;
switch (port_idx) {
case PortA:
gpio_add = GPIOA_BASE;
__GPIOA_CLK_ENABLE();
break;
case PortB:
gpio_add = GPIOB_BASE;
__GPIOB_CLK_ENABLE();
break;
case PortC:
gpio_add = GPIOC_BASE;
__GPIOC_CLK_ENABLE();
break;
case PortD:
gpio_add = GPIOD_BASE;
__GPIOD_CLK_ENABLE();
break;
case PortF:
gpio_add = GPIOF_BASE;
__GPIOF_CLK_ENABLE();
break;
default:
error("Pinmap error: wrong port number.");
break;
}
return gpio_add;
}
/**
* Configure pin (mode, speed, output type and pull-up/pull-down)
*/
void pin_function(PinName pin, int data)
{
MBED_ASSERT(pin != (PinName)NC);
// Get the pin informations
uint32_t mode = STM_PIN_MODE(data);
uint32_t pupd = STM_PIN_PUPD(data);
uint32_t afnum = STM_PIN_AFNUM(data);
uint32_t port_index = STM_PORT(pin);
uint32_t pin_index = STM_PIN(pin);
// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);
GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
// Configure GPIO
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
GPIO_InitStructure.Mode = gpio_mode[mode];
GPIO_InitStructure.Pull = pupd;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = afnum;
HAL_GPIO_Init(gpio, &GPIO_InitStructure);
// [TODO] Disconnect JTAG-DP + SW-DP signals.
// Warning: Need to reconnect under reset
//if ((pin == PA_13) || (pin == PA_14)) {
//
//}
}
/**
* Configure pin pull-up/pull-down
*/
void pin_mode(PinName pin, PinMode mode)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t port_index = STM_PORT(pin);
uint32_t pin_index = STM_PIN(pin);
// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);
GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
// Configure pull-up/pull-down resistors
uint32_t pupd = (uint32_t)mode;
if (pupd > 2) {
pupd = 0; // Open-drain = No pull-up/No pull-down
}
gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
}

352
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/serial_api.c
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/* 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 "serial_api.h"
#if DEVICE_SERIAL
#include "cmsis.h"
#include "pinmap.h"
#include <string.h>
#include "PeripheralPins.h"
#define UART_NUM (3)
static uint32_t serial_irq_ids[UART_NUM] = {0, 0, 0};
static uart_irq_handler irq_handler;
UART_HandleTypeDef UartHandle;
int stdio_uart_inited = 0;
serial_t stdio_uart;
static void init_uart(serial_t *obj)
{
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
UartHandle.Init.BaudRate = obj->baudrate;
UartHandle.Init.WordLength = obj->databits;
UartHandle.Init.StopBits = obj->stopbits;
UartHandle.Init.Parity = obj->parity;
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
if (obj->pin_rx == NC) {
UartHandle.Init.Mode = UART_MODE_TX;
} else if (obj->pin_tx == NC) {
UartHandle.Init.Mode = UART_MODE_RX;
} else {
UartHandle.Init.Mode = UART_MODE_TX_RX;
}
// Disable the reception overrun detection
UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;
UartHandle.AdvancedInit.OverrunDisable = UART_ADVFEATURE_OVERRUN_DISABLE;
HAL_UART_Init(&UartHandle);
}
void serial_init(serial_t *obj, PinName tx, PinName rx)
{
// Determine the UART to use (UART_1, UART_2, ...)
UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
// Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
MBED_ASSERT(obj->uart != (UARTName)NC);
// Enable USART clock + switch to SystemClock
if (obj->uart == UART_1) {
__USART1_CLK_ENABLE();
__HAL_RCC_USART1_CONFIG(RCC_USART1CLKSOURCE_SYSCLK);
obj->index = 0;
}
if (obj->uart == UART_2) {
__USART2_CLK_ENABLE();
__HAL_RCC_USART2_CONFIG(RCC_USART2CLKSOURCE_SYSCLK);
obj->index = 1;
}
if (obj->uart == UART_3) {
__USART3_CLK_ENABLE();
__HAL_RCC_USART3_CONFIG(RCC_USART3CLKSOURCE_SYSCLK);
obj->index = 2;
}
// Configure the UART pins
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
if (tx != NC) {
pin_mode(tx, PullUp);
}
if (rx != NC) {
pin_mode(rx, PullUp);
}
// Configure UART
obj->baudrate = 9600;
obj->databits = UART_WORDLENGTH_8B;
obj->stopbits = UART_STOPBITS_1;
obj->parity = UART_PARITY_NONE;
obj->pin_tx = tx;
obj->pin_rx = rx;
init_uart(obj);
// For stdio management
if (obj->uart == STDIO_UART) {
stdio_uart_inited = 1;
memcpy(&stdio_uart, obj, sizeof(serial_t));
}
}
void serial_free(serial_t *obj)
{
// Reset UART and disable clock
if (obj->uart == UART_1) {
__USART1_FORCE_RESET();
__USART1_RELEASE_RESET();
__USART1_CLK_DISABLE();
}
if (obj->uart == UART_2) {
__USART2_FORCE_RESET();
__USART2_RELEASE_RESET();
__USART2_CLK_DISABLE();
}
if (obj->uart == UART_3) {
__USART3_FORCE_RESET();
__USART3_RELEASE_RESET();
__USART3_CLK_DISABLE();
}
// Configure GPIOs
pin_function(obj->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
pin_function(obj->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
serial_irq_ids[obj->index] = 0;
}
void serial_baud(serial_t *obj, int baudrate)
{
obj->baudrate = baudrate;
init_uart(obj);
}
void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
{
if (data_bits == 9) {
obj->databits = UART_WORDLENGTH_9B;
} else {
obj->databits = UART_WORDLENGTH_8B;
}
switch (parity) {
case ParityOdd:
case ParityForced0:
obj->parity = UART_PARITY_ODD;
break;
case ParityEven:
case ParityForced1:
obj->parity = UART_PARITY_EVEN;
break;
default: // ParityNone
obj->parity = UART_PARITY_NONE;
break;
}
if (stop_bits == 2) {
obj->stopbits = UART_STOPBITS_2;
} else {
obj->stopbits = UART_STOPBITS_1;
}
init_uart(obj);
}
/******************************************************************************
* INTERRUPTS HANDLING
******************************************************************************/
static void uart_irq(UARTName name, int id)
{
UartHandle.Instance = (USART_TypeDef *)name;
if (serial_irq_ids[id] != 0) {
if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TC) != RESET) {
irq_handler(serial_irq_ids[id], TxIrq);
__HAL_UART_CLEAR_IT(&UartHandle, UART_FLAG_TC);
}
if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) {
irq_handler(serial_irq_ids[id], RxIrq);
volatile uint32_t tmpval = UartHandle.Instance->RDR; // Clear RXNE bit
}
}
}
static void uart1_irq(void)
{
uart_irq(UART_1, 0);
}
static void uart2_irq(void)
{
uart_irq(UART_2, 1);
}
static void uart3_irq(void)
{
uart_irq(UART_3, 2);
}
void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
{
irq_handler = handler;
serial_irq_ids[obj->index] = id;
}
void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
{
IRQn_Type irq_n = (IRQn_Type)0;
uint32_t vector = 0;
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
if (obj->uart == UART_1) {
irq_n = USART1_IRQn;
vector = (uint32_t)&uart1_irq;
}
if (obj->uart == UART_2) {
irq_n = USART2_IRQn;
vector = (uint32_t)&uart2_irq;
}
if (obj->uart == UART_3) {
irq_n = USART3_IRQn;
vector = (uint32_t)&uart3_irq;
}
if (enable) {
if (irq == RxIrq) {
__HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE);
} else { // TxIrq
__HAL_UART_ENABLE_IT(&UartHandle, UART_IT_TC);
}
NVIC_SetVector(irq_n, vector);
NVIC_EnableIRQ(irq_n);
} else { // disable
int all_disabled = 0;
if (irq == RxIrq) {
__HAL_UART_DISABLE_IT(&UartHandle, UART_IT_RXNE);
// Check if TxIrq is disabled too
if ((UartHandle.Instance->CR1 & USART_CR1_TCIE) == 0) all_disabled = 1;
} else { // TxIrq
__HAL_UART_DISABLE_IT(&UartHandle, UART_IT_TC);
// Check if RxIrq is disabled too
if ((UartHandle.Instance->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
}
if (all_disabled) NVIC_DisableIRQ(irq_n);
}
}
/******************************************************************************
* READ/WRITE
******************************************************************************/
int serial_getc(serial_t *obj)
{
USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
while (!serial_readable(obj));
if (obj->databits == UART_WORDLENGTH_8B) {
return (int)(uart->RDR & (uint8_t)0xFF);
} else {
return (int)(uart->RDR & (uint16_t)0x1FF);
}
}
void serial_putc(serial_t *obj, int c)
{
USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
while (!serial_writable(obj));
if (obj->databits == UART_WORDLENGTH_8B) {
uart->TDR = (uint8_t)(c & (uint8_t)0xFF);
} else {
uart->TDR = (uint16_t)(c & (uint16_t)0x1FF);
}
}
int serial_readable(serial_t *obj)
{
int status;
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
// Check if data is received
status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) ? 1 : 0);
return status;
}
int serial_writable(serial_t *obj)
{
int status;
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
// Check if data is transmitted
status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE) != RESET) ? 1 : 0);
return status;
}
void serial_clear(serial_t *obj)
{
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
__HAL_UART_CLEAR_IT(&UartHandle, UART_FLAG_TC);
__HAL_UART_SEND_REQ(&UartHandle, UART_RXDATA_FLUSH_REQUEST);
}
void serial_pinout_tx(PinName tx)
{
pinmap_pinout(tx, PinMap_UART_TX);
}
void serial_break_set(serial_t *obj)
{
UartHandle.Instance = (USART_TypeDef *)(obj->uart);
HAL_LIN_SendBreak(&UartHandle);
}
void serial_break_clear(serial_t *obj)
{
}
#endif

299
libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F302R8/spi_api.c
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/* 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"
#include "PeripheralPins.h"
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_2) {
__SPI2_CLK_ENABLE();
}
if (obj->spi == SPI_3) {
__SPI3_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_32; // 1 MHz (HSI) or 1.13 MHz (HSE)
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_2) {
__SPI2_FORCE_RESET();
__SPI2_RELEASE_RESET();
__SPI2_CLK_DISABLE();
}
if (obj->spi == SPI_3) {
__SPI3_FORCE_RESET();
__SPI3_RELEASE_RESET();
__SPI3_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 APB1CLK : 32 MHz if HSI is used, 36 MHz if HSE is used
if (hz < 250000) {
obj->br_presc = SPI_BAUDRATEPRESCALER_256; // 125 kHz - 141 kHz
} else if ((hz >= 250000) && (hz < 500000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_128; // 250 kHz - 280 kHz
} else if ((hz >= 500000) && (hz < 1000000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_64; // 500 kHz - 560 kHz
} else if ((hz >= 1000000) && (hz < 2000000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_32; // 1 MHz - 1.13 MHz
} else if ((hz >= 2000000) && (hz < 4000000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_16; // 2 MHz - 2.25 MHz
} else if ((hz >= 4000000) && (hz < 8000000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_8; // 4 MHz - 4.5 MHz
} else if ((hz >= 8000000) && (hz < 16000000)) {
obj->br_presc = SPI_BAUDRATEPRESCALER_4; // 8 MHz - 9 MHz
} else { // >= 16000000
obj->br_presc = SPI_BAUDRATEPRESCALER_2; // 16 MHz - 18 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));
if (obj->bits == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
*p_spi_dr = (uint8_t)value;
} else { // SPI_DATASIZE_16BIT
spi->DR = (uint16_t)value;
}
}
static inline int ssp_read(spi_t *obj)
{
SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
while (!ssp_readable(obj));
if (obj->bits == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
return (int)(*p_spi_dr);
} else {
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));
if (obj->bits == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
return (int)(*p_spi_dr);
} else {
return (int)spi->DR;
}
}
void spi_slave_write(spi_t *obj, int value)
{
SPI_TypeDef *spi = (SPI_TypeDef *)(obj->spi);
while (!ssp_writeable(obj));
if (obj->bits == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
*p_spi_dr = (uint8_t)value;
} else { // SPI_DATASIZE_16BIT
spi->DR = (uint16_t)value;
}
}
int spi_busy(spi_t *obj)
{
return ssp_busy(obj);
}
#endif