Hello all!
I am trying to interface MPU6050 with nrf52832 dk using the following code. On the LOGGER, I see that the MPU isn't detected, despite I replaced the MPU. The if condition in the following condition doesn't get true. What might be the possible reasons?
/**
*/
#include <stdio.h>
#include "boards.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_drv_twi.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
/* TWI instance ID. */
#define TWI_INSTANCE_ID 0 // create a ID constant
// create a handle which will point to TWI instance, in this case its TWI_0
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
// a function to initialize the twi(i2c)
void twi_init(void)
{
ret_code_t err_code; // a variable to hold error code
// Create a struct with configurations and pass the values to these configurations.
const nrf_drv_twi_config_t twi_config = {
.scl = 22, // scl connected to pin 22, you can change it to any other pin
.sda = 23, // sda connected to pin 23, you can change it to any other pin
.frequency = NRF_DRV_TWI_FREQ_100K, // set the communication speed to 100K, we can select 250k or 400k as well
.interrupt_priority = APP_IRQ_PRIORITY_HIGH, // Interrupt priority is set to high, keep in mind to change it if you are using a soft-device
.clear_bus_init = false // automatic bus clearing
};
err_code = nrf_drv_twi_init(&m_twi, &twi_config, NULL, NULL); // initialize the twi
APP_ERROR_CHECK(err_code); // check if any error occured during initialization
nrf_drv_twi_enable(&m_twi); // enable the twi comm so that its ready to communicate with the sensor
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
ret_code_t err_code; // a variable to hold error code value
uint8_t address = 0x68; // address of the sensor
uint8_t sample_data = 0x00; // sample data initialized with 0 value.
// initialize the Logger so that we can print msgs on the logger
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO("Application Started");
NRF_LOG_FLUSH(); // flushing is necessary if deferred is set to 1(check this video tutorial to know it better)
twi_init(); // call the twi initialization function
// read some data from the sensor
err_code = nrf_drv_twi_rx(&m_twi, address, &sample_data, sizeof(sample_data));
if(err_code == NRF_SUCCESS) // if reading data was successful
{
NRF_LOG_INFO("Successfully detected a device at address: 0x%x", address); // let the users know its working
}
else
{
NRF_LOG_INFO("No device detected");
}
NRF_LOG_FLUSH(); // flushing is important, if you set the deffered to 1, if deffered is set to 0 then we don't need to flush the log buffer.
while (true)
{
/* Empty loop. */
}
}
/** @} */
