MPU6050(I2C) not working

Posted on September 08, 2017 at 15:38

Hello All,

I am using STM32F100 MCU for MPU6050 sensor interfacing.

I am using I2C.

when i generate code , i get it

void HAL_I2C_MspInit(I2C_HandleTypeDef* hi2c)

{

GPIO_InitTypeDef GPIO_InitStruct;

if(hi2c->Instance==I2C1)

{

/* USER CODE BEGIN I2C1_MspInit 0 */

/* USER CODE END I2C1_MspInit 0 */

/**I2C1 GPIO Configuration

PB6 ------> I2C1_SCL

PB7 ------> I2C1_SDA

*/

GPIO_InitStruct.Pin = MPU6050_SCL_Pin|MPU6050_SDA_Pin;

GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;

GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;

HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* Peripheral clock enable */

/* USER CODE BEGIN I2C1_MspInit 1 */

__HAL_RCC_I2C1_CLK_ENABLE();

/* USER CODE END I2C1_MspInit 1 */

}

}

with this code,

• i am not getting Device address as 0x68/69 everytime.1 out of 15 times, i get 0x68 .
• Device is not initializing.(Getting HAL_BUSY flag) when address is not 0x68.
• when i get 0x68(it is very rare) , MPU is working and i get correct steps count from my code of MPU6050

when i put CLOCK_ENABLE before GPIO_ENABLE ,

• i got device address correctly every time(15 out of 15).
• but I am getting 2 issues
                 1. functionality of MPU is not working. step count is not working

                      2. I am getting switch interrupt continuously,even if i am not pressing switch.

                      3. when i disable interrupt, still MPU6050 is not working.

Please help me to resolve this.

why I2C is not giving correct address??♯♯♯♯♯@@♯♯

#i2c-busy #i2c #mpu6050