ARM CMSIS Driver 學(xué)習(xí) 之 SPI
CMSIS Driver 都有著相似的 API 函數(shù)和相似的調(diào)用方法，它是在 ST HAL 庫的基礎(chǔ)上又進(jìn)一步的封裝，使用和配置起來都要比 ST HAL 庫要方便和簡單許多，并且還是跨平臺的，非常有學(xué)習(xí)和使用的價值。今天學(xué)習(xí) SPI API 的使用，詳細(xì)介紹見CMSIS Driver SPI API
SPI 發(fā)送與接收
/**
******************************************************************************
* @file main.c
* @author XinLi
* @version v1.0
* @date 20-March-2018
* @brief Main program body.
******************************************************************************
* @attention
*
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
*
******************************************************************************
*/
/* Header includes -----------------------------------------------------------*/
#include "stm32f4xx.h"
#include "Driver_SPI.h"
#include
/* Macro definitions ---------------------------------------------------------*/
/* Type definitions ----------------------------------------------------------*/
/* Variable declarations -----------------------------------------------------*/
extern ARM_DRIVER_SPI Driver_SPI1;
/* Variable definitions ------------------------------------------------------*/
static uint8_t txBuffer[5] = {0xAB};
static uint8_t rxBuffer[5] = {0};
static uint8_t dataBuffer[5] = {0};
/* Function declarations -----------------------------------------------------*/
static void SPI1_Callback(uint32_t event);
static void SPI1_CS_Init(void);
static void SPI1_CS_Low(void);
static void SPI1_CS_High(void);
static void SystemClock_Config(void);
/* Function definitions ------------------------------------------------------*/
/**
* @brief Main program.
* @param None.
* @return None.
*/
int main(void)
{
/* STM32F4xx HAL library initialization:
- Configure the Flash prefetch, instruction and Data caches
- Configure the Systick to generate an interrupt each 1 msec
- Set NVIC Group Priority to 4
- Global MSP (MCU Support Package) initialization
*/
HAL_Init();
/* Configure the system clock to 168 MHz */
SystemClock_Config();
SPI1_CS_Init();
Driver_SPI1.Initialize(SPI1_Callback);
Driver_SPI1.PowerControl(ARM_POWER_FULL);
Driver_SPI1.Control(ARM_SPI_MODE_MASTER |
ARM_SPI_CPOL0_CPHA0 |
ARM_SPI_MSB_LSB |
ARM_SPI_SS_MASTER_UNUSED |
ARM_SPI_DATA_BITS(8), 10000000);
SPI1_CS_Low();
Driver_SPI1.Transfer(txBuffer, rxBuffer, sizeof(txBuffer));
for(;;)
{
}
}
/**
* @brief SPI1 callback function.
* @param event: SPI events notification mask.
* @return None.
*/
static void SPI1_Callback(uint32_t event)
{
if(event & ARM_SPI_EVENT_TRANSFER_COMPLETE)
{
SPI1_CS_High();
memcpy(dataBuffer, rxBuffer, sizeof(rxBuffer));
}
}
/**
* @brief SPI1 CS pin initialize.
* @param None.
* @return None.
*/
static void SPI1_CS_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOB_CLK_ENABLE();
/* Configure GPIO pin : PtPin */
GPIO_InitStruct.Pin = GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_SET);
}
/**
* @brief SPI1 CS pin level pull low.
* @param None.
* @return None.
*/
static void SPI1_CS_Low(void)
{
/* Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_RESET);
}
/**
* @brief SPI1 CS pin level pull high.
* @param None.
* @return None.
*/
static void SPI1_CS_High(void)
{
/* Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_14, GPIO_PIN_SET);
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 168000000
* HCLK(Hz) = 168000000
* AHB Prescaler = 1
* APB1 Prescaler = 4
* APB2 Prescaler = 2
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 336
* PLL_P = 2
* PLL_Q = 7
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 5
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable Power Control clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Enable HSE Oscillator and activate PLL with HSE as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
/* Select PLL as system clock
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