Hi,
I have a peculiar problem problem with BMI160 and nrf52. BMI160 is connected to nrf52 via pins 12 and 13. I am using peripheral/twi_sensor example. After configuring it via I2c I am able to read the chip ID of 0x1d , but the chip does not go to normal mode and the accelerometer value always return zero. Do you see any issues with the below code. Kindly help.
#include
#include "boards.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "bmi160.h"
/* TWI instance ID. */
#define TWI_INSTANCE_ID 0
struct bmi160_dev sensor;
struct bmi160_sensor_data accel;
struct bmi160_sensor_data gyro;
int8_t rslt = BMI160_OK;
/* Mode for LM75B. */
#define NORMAL_MODE 0U
/* Indicates if operation on TWI has ended. */
static volatile bool m_xfer_done = false;
/* TWI instance. */
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
/* Buffer for samples read from temperature sensor. */
static uint8_t m_sample;
/**
* @brief UART initialization.
*/
void twi_init (void)
{
// NRF_LOG_INFO("in twi\r\n");
ret_code_t err_code;
const nrf_drv_twi_config_t twi_lm75b_config = {
.scl = 12,//ARDUINO_SCL_PIN,
.sda = 11,//ARDUINO_SDA_PIN,
.frequency = NRF_DRV_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
.clear_bus_init = false
};
err_code = nrf_drv_twi_init(&m_twi, &twi_lm75b_config, NULL, NULL);
APP_ERROR_CHECK(err_code);
if (NRF_SUCCESS == err_code)
{
nrf_drv_twi_enable(&m_twi);
NRF_LOG_INFO("TWI init success...");
}
nrf_delay_ms(5);
}
int8_t Acc_i2c_Write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
{
// NRF_LOG_INFO("WRITE: dev_id: %x reg_addr: %x reg_data: %x len: %i\n", dev_id, reg_addr, *reg_data, len);
int8_t rslt = 0;
uint8_t data[len + 1];
data[0] = reg_addr;
for (uint16_t i = 0; i < len; i++) {
data[i + 1] = reg_data[i];
}
rslt = nrf_drv_twi_tx(&m_twi, dev_id, reg_data, len + 1, false);
APP_ERROR_CHECK(rslt);
return rslt;
}
int8_t Acc_i2c_Read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
{
int8_t rslt = 0;
// NRF_LOG_INFO("READ: dev_id: %x reg_addr: %x len: %i\n", dev_id, reg_addr, len);
rslt = nrf_drv_twi_tx(&m_twi, dev_id, ®_addr, 1, false);
APP_ERROR_CHECK(rslt);
if (rslt == 0)
{
rslt = nrf_drv_twi_rx(&m_twi, dev_id, reg_data, len);
}
// NRF_LOG_INFO("READ: %x",*reg_data);
return rslt;
}
void Acc_delay_ms(uint32_t period)
{
/*if (period==NULL){
period = 1;
}// delay time*/
nrf_delay_ms( period ) ;
}
void BMI160_init (void)
{
sensor.id = 0x69,//BMI160_I2C_ADDR; //0x69
sensor.interface = BMI160_I2C_INTF; //0x00
sensor.read = &Acc_i2c_Read;
sensor.write = &Acc_i2c_Write;
sensor.delay_ms = &Acc_delay_ms;
rslt = bmi160_init(&sensor);
APP_ERROR_CHECK(rslt);
if(rslt == BMI160_OK){
NRF_LOG_INFO("BMI160 Initialized...");
} else {
NRF_LOG_INFO("BMI160 not Initialized...");
}
//NRF_LOG_FLUSH();
sensor.accel_cfg.odr = BMI160_ACCEL_ODR_100HZ;//BMI160_ACCEL_ODR_1600HZ;
sensor.accel_cfg.range = BMI160_ACCEL_RANGE_2G;
sensor.accel_cfg.bw = BMI160_ACCEL_BW_NORMAL_AVG4;
sensor.accel_cfg.power = BMI160_ACCEL_NORMAL_MODE;
rslt = bmi160_set_sens_conf(&sensor);
APP_ERROR_CHECK(rslt);
if(rslt == BMI160_OK){
NRF_LOG_INFO("sensor Configured...");
} else {
NRF_LOG_INFO("sensor not Configured...");
}
/* Select the power mode */
sensor.accel_cfg.power = BMI160_ACCEL_NORMAL_MODE;
/* Set the Power mode */
rslt = bmi160_set_power_mode(&sensor);
if(rslt == BMI160_OK){
NRF_LOG_INFO("normal Configured...");
} else {
NRF_LOG_INFO("normal not Configured...");
}
//NRF_LOG_FLUSH();
}
static void read_sensor_data()
{
m_xfer_done = false;
accel.x = 1;
bmi160_get_sensor_data(BMI160_ACCEL_SEL, &accel, NULL, &sensor);
NRF_LOG_INFO("DataX:%d", accel.x);
NRF_LOG_INFO("DataY:%d", accel.y);
NRF_LOG_INFO("DataZ:%d", accel.z);
}
#if 1
int main(void)
{
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO("\r\nBMI160 get started.\n");
NRF_LOG_FLUSH();
Acc_delay_ms(100);
twi_init();
Acc_delay_ms(50);
//LM75B_set_mode();
BMI160_init();
Acc_delay_ms(1000);
uint8_t reg_addr = BMI160_CHIP_ID_ADDR;
uint8_t data;
uint16_t len = 1;
rslt = bmi160_get_regs(reg_addr, &data, len, &sensor);
NRF_LOG_INFO("chip addr: %x \r\n",data);
/* Select the power mode */
sensor.accel_cfg.power = BMI160_ACCEL_NORMAL_MODE;
/* Set the Power mode */
rslt = bmi160_set_power_mode(&sensor);
if(rslt == BMI160_OK){
NRF_LOG_INFO("normal Configured...");
} else {
NRF_LOG_INFO("normal not Configured...");
}
Acc_delay_ms(1000);
uint8_t reg_addr1 = BMI160_PMU_STATUS_ADDR;
data = 0xff;
len = 1;
rslt = bmi160_get_regs(reg_addr1, &data, len, &sensor);
NRF_LOG_INFO("mode: %x \r\n",data);
uint8_t cmd =0x11;
uint8_t *cmd1=&cmd;
while(true)
{
/* Set the Power mode */
Acc_delay_ms(1000);
read_sensor_data();
NRF_LOG_FLUSH();
}
}
