I want to use the latest HAL library instead of Standard Peripheral Library.
And I want to read out the BMA250E G-sensor's chip_id, but it doesn't work.
The value of aRxBuffer always keep at 0x00. But it should be 0xF9!
What's wrong in my code?
#include "stm32f4xx_hal.h"
#define I2Cx_SDA_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
#define I2Cx_SDA_PIN GPIO_PIN_9
#define I2Cx_SDA_GPIO_PORT GPIOB
#define I2Cx_SDA_AF GPIO_AF4_I2C1
#define I2Cx_SCL_GPIO_CLK_ENABLE() __HAL_RCC_GPIOB_CLK_ENABLE()
#define I2Cx_SCL_PIN GPIO_PIN_6
#define I2Cx_SCL_GPIO_PORT GPIOB
#define I2Cx_SCL_AF GPIO_AF4_I2C1
#define I2Cx_CLK_ENABLE() __HAL_RCC_I2C1_CLK_ENABLE()
#define I2Cx_FORCE_RESET() __HAL_RCC_I2C1_FORCE_RESET()
#define I2Cx_RELEASE_RESET() __HAL_RCC_I2C1_RELEASE_RESET()
#define I2C_ADDRESS 0x18
static void SystemClock_Config(void);
uint8_t aTxBuffer[2], aRxBuffer;
int main()
{
HAL_Init();
SystemClock_Config();
I2C_HandleTypeDef I2cHandle;
I2cHandle.Instance = I2C1;
I2cHandle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
I2cHandle.Init.ClockSpeed = 400000;
I2cHandle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
I2cHandle.Init.OwnAddress1 = 0;
I2cHandle.Init.OwnAddress2 = 0;
HAL_I2C_Init(&I2cHandle);
aTxBuffer[0] = 0x00;
HAL_I2C_Master_Transmit(&I2cHandle, I2C_ADDRESS, aTxBuffer, 1, 10000);
HAL_I2C_Master_Receive(&I2cHandle, I2C_ADDRESS|0x01, &aRxBuffer, 1, 10000);
HAL_Delay(1000);
}
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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 = 360;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 7;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType =
(RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
}
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct;
I2Cx_SCL_GPIO_CLK_ENABLE();
I2Cx_SDA_GPIO_CLK_ENABLE();
GPIO_InitStruct.Pin = I2Cx_SCL_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = I2Cx_SCL_AF;
HAL_GPIO_Init(I2Cx_SCL_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = I2Cx_SDA_PIN;
GPIO_InitStruct.Alternate = I2Cx_SDA_AF;
HAL_GPIO_Init(I2Cx_SDA_GPIO_PORT, &GPIO_InitStruct);
}
void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
{
I2Cx_FORCE_RESET();
I2Cx_RELEASE_RESET();
HAL_GPIO_DeInit(I2Cx_SCL_GPIO_PORT, I2Cx_SCL_PIN);
HAL_GPIO_DeInit(I2Cx_SDA_GPIO_PORT, I2Cx_SDA_PIN);
}
In projects generated by STM32CubeMX, the SystemInit() function in system_stm32f4xx.c, called by the startup code before main(), resets the vector table address register to the start of the FLASH.
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
This value must be a multiple of 0x200. */
/* -- snip -- */
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
You can edit this file directly (and not run STM32CubeMX on the project again, because it appears to overwrite this file), or simply set the right value again in main(), before enabling interrupts.