I am using STM32F0 microcontroller for my project with MPU6050. The HAL driver i2c code is working fine for mpu6050 but LL driver code doens't work. I want to use LL driver for i2c. Following is my LL driver code for reading and writing.
uint8_t motionSensor_read(uint8_t slave_address, uint8_t start_address)
{
LL_I2C_SetSlaveAddr(I2C2, 0xD0); /// Prepare Address to send
LL_I2C_SetMasterAddressingMode(I2C2, LL_I2C_ADDRSLAVE_7BIT);
LL_I2C_SetTransferRequest(I2C2, LL_I2C_REQUEST_WRITE); // Request write
LL_I2C_DisableAutoEndMode(I2C2); // Disable automatic STOP condition generation
LL_I2C_SetTransferSize(I2C2, 1); // Set transfer size register
while(LL_I2C_IsActiveFlag_BUSY(I2C2)){} // check I2C busy
LL_I2C_GenerateStartCondition(I2C2); // generate I2C Start address and send address
while (!LL_I2C_IsActiveFlag_TXIS(I2C2)){
}
LL_I2C_TransmitData8(I2C2, start_address);
while (!LL_I2C_IsActiveFlag_TXIS(I2C2)){
}
LL_I2C_SetSlaveAddr(I2C2, 0xD0); // Prepare Address to send
LL_I2C_SetMasterAddressingMode(I2C2, LL_I2C_ADDRSLAVE_7BIT);
LL_I2C_SetTransferRequest(I2C2, LL_I2C_REQUEST_READ); // Request read
LL_I2C_DisableAutoEndMode(I2C2); // Enable autoend mode
LL_I2C_SetTransferSize(I2C2, 1); // Set transfer size register
LL_I2C_GenerateStartCondition(I2C2); // generate I2C Start address and send address
LL_I2C_AcknowledgeNextData(I2C2, LL_I2C_ACK);
while (!LL_I2C_IsActiveFlag_RXNE(I2C2)){
}
dat_m = LL_I2C_ReceiveData8(I2C2);
LL_I2C_AcknowledgeNextData(I2C2, LL_I2C_NACK);
LL_I2C_GenerateStopCondition(I2C2);
LL_I2C_ClearFlag_TXE(I2C2);
LL_I2C_ClearFlag_OVR(I2C2);
LL_I2C_ClearFlag_NACK(I2C2);
LL_I2C_ClearFlag_STOP(I2C2);
return dat_m;
}
int motionSensor_write(uint8_t slave_address, uint8_t start_address,
uint8_t data) {
LL_I2C_Disable(I2C2);
LL_I2C_ClearFlag_STOP(I2C2);
LL_I2C_Enable(I2C2);
LL_I2C_EnableIT_TX(I2C2);
LL_I2C_HandleTransfer(I2C2, 0xD0, LL_I2C_ADDRSLAVE_7BIT, 2, LL_I2C_MODE_AUTOEND, LL_I2C_GENERATE_START_WRITE);
LL_I2C_TransmitData8(I2C2, start_address);
while (!LL_I2C_IsActiveFlag_TXIS(I2C2)) {
}
//Send data
LL_I2C_TransmitData8(I2C2, data);
while (!LL_I2C_IsActiveFlag_TXIS(I2C2)) {
}
LL_I2C_GenerateStopCondition(I2C2);
return 0;
}
I first try to write to a particular register of mpu6050 but the code is always struck while checking for TXIS interrupt flag in motionSensor_write. Where I am making mistake? How to resolve my problem.
