Hi everyone! i am using stm32l0c6t6, i need use spi with register, because i need make function type: spiwriteread(uint8_t data), to write in the device Lora llcc68 and read the return register, but with hal i can´t. Then i have configurated the spi using register, but when transmit i read in the logic analyzer inverter data, example: i transmit spiwriteread(0x55); and the logic analyzer had 0XAA; i don´t know why this is ocurr because the configuration register is rigth. i going to put the complete code:
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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2023 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
//uint8_t Data[]="hola";
char *Data = "hola";
uint8_t data1;
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
/* USER CODE BEGIN PFP */
void SPI_Init(void);
uint8_t SPI_TransmitData(uint8_t *data);
void SPI_TransmitString(char *str);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
//LL_SPI_TransmitData8(SPI1,Data);
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
SPI_Init();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
//SPI_TransmitData(Data);
SPI_TransmitData(0x55);
HAL_Delay(500);
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief GPIO Initialization Function
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
/*-----------------------------------------------------------*/
/*----------------------------------------------------------*/
void SPI_Init(void) {
// Habilitar el reloj para el SPI y el puerto GPIO correspondiente (puerto B)
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
RCC->IOPENR |= RCC_IOPENR_GPIOBEN;
// Configurar los pines SCK (PB13), MOSI (PB15) y MISO (PB14) como alternativa de función SPI
GPIOB->MODER &= ~(GPIO_MODER_MODE13_Msk | GPIO_MODER_MODE14_Msk | GPIO_MODER_MODE15_Msk);
GPIOB->MODER |= (GPIO_MODER_MODE13_1 | GPIO_MODER_MODE14_1 | GPIO_MODER_MODE15_1);
GPIOB->AFR[1] &= ~((0xF << GPIO_AFRH_AFSEL13_Pos) | (0xF << GPIO_AFRH_AFSEL14_Pos) | (0xF << GPIO_AFRH_AFSEL15_Pos));
GPIOB->AFR[1] |= ((0x0 << GPIO_AFRH_AFSEL13_Pos) | (0x0 << GPIO_AFRH_AFSEL14_Pos) | (0x0 << GPIO_AFRH_AFSEL15_Pos));
// Configurar los registros del SPI
//////////////////////////////////
SPI1->CR1 = 0; // Asegúrate de deshabilitar el SPI antes de configurar
// Configuración del modo de polaridad y fase
/////////////////////////////////////////////
SPI1->CR1 &= ~SPI_CR1_CPOL; // CPOL = 0
SPI1->CR1 &= ~SPI_CR1_CPHA; // CPHA = 0
// Configuración del formato de datos y tamaño
//////////////////////////////////////////////
SPI1->CR1 &= ~SPI_CR1_LSBFIRST; // MSB first
SPI1->CR1 &= ~SPI_CR1_DFF; // 8 bits
// Configuración de la velocidad (baud rate)
// El cálculo del valor del registro depende de la frecuencia del reloj del sistema
uint32_t systemClockFreq = 16000000; // Frecuencia del reloj del sistema en Hz
uint32_t desiredBaudRate = 125000; // Baud rate deseado en bps
uint32_t baudRatePrescaler = (systemClockFreq + (desiredBaudRate / 2)) / desiredBaudRate;
SPI1->CR1 |= ((baudRatePrescaler - 1) << SPI_CR1_BR_Pos);
// Configuración del modo master
SPI1->CR1 |= SPI_CR1_MSTR;
// Habilitar el SPI
SPI1->CR1 |= SPI_CR1_SPE;
}
uint8_t SPI_TransmitData(uint8_t *data) {
data1=data;
// Esperar a que el registro de transmisión esté vacío
while (!(SPI1->SR & SPI_SR_TXE));
// Enviar el dato
*( uint8_t*)&(SPI1->DR) = data1;
// Esperar a que la transmisión se complete
while (SPI1->SR & SPI_SR_BSY);
// Esperar a que el registro de recepción esté lleno
while (!(SPI1->SR & SPI_SR_RXNE));
// Leer y devolver el dato recibido
return *((volatile uint8_t*)&SPI1->DR);
}
void SPI_TransmitString(char *str) {
uint16_t len = strlen(str);
for (uint16_t i = 0; i < len; i++) {
SPI_TransmitData((uint8_t)str[i]);
}
}
/*----------------------------------------------------------*/
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
*
@PAram file: pointer to the source file name
*
@PAram line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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