HI
I started off to test all the drivers before the actual development process kickstarts.I tried using the TWI sensor example for an i2c driver check.I used a DS1307 simple RTC for it.But i am unable to even send my first data frame and here is my code.when I tried debugging the code ,it seems to be stuck in the while loop for completion check of first tx transmission .
Can you point out my mistakes and any other suggestion i need to check .
Here are the complete specs
Board Rigardo BMD 350
SDK v15.3.0
DS1307 connection with Rigardo board
SCL PIN-->pin0.27
SDA PIN-->pin0.26
GND -->GND
VCC (not connected using coin cell battery for power )
Rigardo board is powered by USB wire
Thanks in advance
#include <stdio.h>
#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"
/* TWI instance ID. */
#define TWI_INSTANCE_ID 0
/* Common addresses definition for temperature sensor. */
#define LM75B_ADDR (0x90U >> 1)
#define LM75B_REG_TEMP 0x00U
#define LM75B_REG_CONF 0x01U
#define LM75B_REG_THYST 0x02U
#define LM75B_REG_TOS 0x03U
#define DS1307_ADDR (0x68)
#define DS1307_SEC (0x00)
#define DS1307_MIN (0x01)
#define DS1307_HRS (0x02)
#define DS1307_DAY (0x03)
#define DS1307_DATE (0x04)
#define DS1307_MONTH (0x05)
#define DS1307_YEAR (0x06)
typedef struct
{
uint8_t s;
uint8_t m;
uint8_t h;
} sum_t;
static sum_t m_sum = {0};
/* 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[3];
/**
* @brief Function for setting active mode on MMA7660 accelerometer.
*/
void LM75B_set_mode(void)
{
ret_code_t err_code;
uint8_t reg[2] = {0x00,0x00};
err_code = nrf_drv_twi_tx(&m_twi,DS1307_ADDR, reg, sizeof(reg), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
/* Writing to LM75B_REG_CONF "0" set temperature sensor in NORMAL mode. */
uint8_t reg1[8] = {DS1307_SEC,0x15,0x59,0x14,0x06,0x05,0x07,0x19};
err_code = nrf_drv_twi_tx(&m_twi,DS1307_ADDR, reg1, sizeof(reg1), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
/*
m_xfer_done = false;
uint8_t reg1[2] = {DS1307_MIN,0x38};
err_code = nrf_drv_twi_tx(&m_twi,DS1307_ADDR, reg1, sizeof(reg1), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
m_xfer_done = false;
uint8_t reg2[2] = {DS1307_HRS,0x14};
err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, reg2, sizeof(reg2), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
m_xfer_done = false;
uint8_t reg3[2] = {DS1307_DAY,0x06};
err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, reg3, sizeof(reg3), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
m_xfer_done = false;
uint8_t reg4[2] = {DS1307_DATE,0x05};
err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, reg4, sizeof(reg3), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
m_xfer_done = false;
uint8_t reg5[2] = {DS1307_MONTH,0x07};
err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, reg5, sizeof(reg3), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
m_xfer_done = false;
uint8_t reg6[2] = {DS1307_YEAR,0x19};
err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, reg6, sizeof(reg3), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
*/
}
/**
* @brief Function for handling data from temperature sensor.
*
* @param[in] temp Temperature in Celsius degrees read from sensor.
*/
__STATIC_INLINE void data_handler(uint8_t *temp)
{
//NRF_LOG_INFO("Temperature: %d Celsius degrees.", temp);
/* Subtracting oldest sample. */
m_sum.s = temp[1];
m_sum.m = temp[2];
m_sum.h = temp[3];
NRF_LOG_INFO("%2x: %2x:%2x",
m_sum.h ,
m_sum.m ,
m_sum.s
);
}
/**
* @brief TWI events handler.
*/
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
switch (p_event->type)
{
case NRF_DRV_TWI_EVT_DONE:
if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
{
data_handler(m_sample);
}
m_xfer_done = true;
break;
default:
break;
}
}
/**
* @brief UART initialization.
*/
void twi_init (void)
{
ret_code_t err_code;
const nrf_drv_twi_config_t twi_lm75b_config = {
.scl = ARDUINO_SCL_PIN,
.sda = ARDUINO_SDA_PIN,
.frequency = NRF_DRV_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_LOW,
.clear_bus_init = false
};
err_code = nrf_drv_twi_init(&m_twi, &twi_lm75b_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&m_twi);
}
/**
* @brief Function for reading data from temperature sensor.
*/
static void read_sensor_data()
{
m_xfer_done = false;
/* Read 1 byte from the specified address - skip 3 bits dedicated for fractional part of temperature. */
ret_code_t err_code = nrf_drv_twi_rx(&m_twi, DS1307_ADDR, (uint8_t*)&m_sample, 3);
APP_ERROR_CHECK(err_code);
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
const uint8_t reg= 0x00;
NRF_LOG_INFO("\r\nTWI sensor example started.");
NRF_LOG_FLUSH();
twi_init();
LM75B_set_mode();
while (true)
{
nrf_delay_ms(500);
ret_code_t err_code = nrf_drv_twi_tx(&m_twi, DS1307_ADDR, ®, sizeof(reg), true);
read_sensor_data();
do
{
__WFE();
}while (m_xfer_done == false);
read_sensor_data();
NRF_LOG_FLUSH();
}
}
