Wie verwende ich die STM32CUBEF4 HAL-Bibliothek, um die Sensordaten mit i2c auszulesen?

Question

Ich möchte die neueste HAL-Bibliothek anstelle der Standardperipheriebibliothek verwenden.

Und ich möchte die BMA250E G-Sensor Chip_id auslesen, aber es funktioniert nicht.

Wert von aRxBuffer immer bei 0x00 bleiben. Aber es sollte 0xf9 sein!

Was ist falsch in meinem 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); 
} 

Answer 1

Zuerst würde ich Ihnen raten, STMCube zu verwenden. Es wird die Uhr und den I2C-Bus für Sie einrichten.

Es ist sehr gut zu überprüfen, was die HAL-Funktionen zurückgeben. Wenn Sie HAL_OK nicht haben, ging etwas schief.

Versuchen Sie zuerst mit 100 KHz und erhöhen Sie dann auf 400 KHz.

Die I2C-Adresse des Geräts lautet 0x18 (wenn SDO geerdet ist, was ich annehme). Aber in der HAL-Treiber, müssen Sie definieren:

#‎define‬ I2C_ADDRESS (0x18<<1) 

Was möchten Sie zu tun ist, ein Register zu lesen, so verwenden Sie keine HAL_I2C_Master_Receive oder HAL_I2C_Master_Transmit, aber HAL_I2C_Mem_Read oder HAL_I2C_Mem_Write, wie folgt aus:

#define REG_CHIP_ID 0x00 
HAL_I2C_Mem_Read(&I2cHandle, I2C_ADDRESS, REG_CHIP_ID, I2C_MEMADD_SIZE_8BIT, &aRxBuffer, 1, 10000); 

beachten Sie auch, dass die HAL Pflege der R/W-Bit der Adresse erfolgt, so dass Sie nicht tun müssen:

I2C_ADDRESS|0x01