I have this program running on KEIL 5, what could be the problem with the code and Do you guys have any sample code for mcp9808? Note- I am using the wired connection not a Bluetooth app to sense the temperature Please Help Thank you!
#include <stdio.h>
#include "boards.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "nrf_drv_twi.h"
#include "nrf_delay.h"
//#define NRF_LOG_MODULE_NAME "APP"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
/* TWI instance ID. */
#define TWI_INSTANCE_ID 0
#define TWI_ADDRESSES 127
/* Common addresses definition for temperature sensor. */
//#define MCP_9808_ADDR (0x18)
//#define MCP_9808_REG_TEMP 0x00U
//#define MCP_9808_REG_CONF 0x01U
//#define MCP_9808_REG_THYST 0x02U
//#define MCP_9808_REG_TOS 0x03U
#define SCL_PIN 28
#define SDA_PIN 29
#define MCP_9808_ADDR (0x18)
//#define MCP_9808_REG_RFU 0x00U
#define MCP_9808_REG_CONF 0x01
//#define MCP_9808_REG_TUPPER 0x02U
//#define MCP_9808_REG_TLOWER 0x03U
//#define MCP_9808_REG_TCRIT 0x04U
//#define MCP_9808_REG_TEMP 0x05U
//#define MCP_9808_REG_MID 0x06U3
//#define MCP_9808_REG_DID 0x07U
//#define MCP_9808_REG_RESR 0x08U
/* Mode for MCP_9808. */
#define NORMAL_MODE 0U
//#define MCP9808_REG_UPPER_TEMP 0x02
//#define MCP9808_REG_LOWER_TEMP 0x03
//#define MCP9808_REG_CRIT_TEMP 0x04
#define MCP9808_REG_AMBIENT_TEMP 0x05
//#define MCP9808_REG_MANUF_ID 0x06
//#define MCP9808_REG_DEVICE_ID 0x07
/* Indicates if operation on TWI has ended. */
static volatile bool m_xfer_done = false;
/* TWI instance. */
static const nrf_drv_twi_t m_twi_mcp9808 = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
/* Buffer for samples read from temperature sensor. */
static uint16_t m_sample;
/**
* @brief Function for setting active mode on MMA7660 accelerometer.
*/
void MCP_9808_set_mode(void)
{
ret_code_t err_code;
/* Writing to MCP_9808_REG_CONF "0" set temperature sensor in NORMAL mode. */
uint8_t reg[2] = {MCP_9808_REG_CONF, NORMAL_MODE};
err_code = nrf_drv_twi_tx(&m_twi_mcp9808, MCP_9808_ADDR, reg, sizeof(reg), false);
APP_ERROR_CHECK(err_code);
while (m_xfer_done == false);
/* Writing to pointer byte. */
reg[0] = MCP9808_REG_AMBIENT_TEMP;
m_xfer_done = false;
err_code = nrf_drv_twi_tx(&m_twi_mcp9808, MCP_9808_ADDR, reg, sizeof(reg), 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(uint32_t temp)
{
union
{
float floatVal;
uint32_t bytes[4];
} floatConverter;
floatConverter.bytes[0]=0x02;
floatConverter.bytes[1]=0x03;
floatConverter.bytes[2]=0x04;
floatConverter.bytes[3]=0x05;
float eepromFloat = floatConverter.floatVal;
// NRF_LOG_INFO("Temperature: %x degree Celsius.\r\n", floatConverter.bytes[3]);
NRF_LOG_INFO("Temperature: %d degree Celsius.\r\n",temp);
//NRF_LOG_INFO("TWI device detected at address 0x%x.\r\n", address);
}
/**
* @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_mcp9808_config = {
.scl = SCL_PIN,
.sda = SDA_PIN,
.frequency = NRF_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
.clear_bus_init = false
};
err_code = nrf_drv_twi_init(&m_twi_mcp9808, &twi_mcp9808_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&m_twi_mcp9808);
}
/**
* @brief Function for reading data from temperature sensor.
*/
static void read_sensor_data()
{
ret_code_t err_code;
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_mcp9808, MCP_9808_ADDR, (uint8_t*)&m_sample, sizeof(m_sample));
APP_ERROR_CHECK(err_code);
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_INFO("\r\nTWI sensor reading\r\n");
NRF_LOG_FLUSH();
twi_init();
MCP_9808_set_mode();
while (true)
{
nrf_delay_ms(1000);
do
{
__WFE();
}while (m_xfer_done == false);
read_sensor_data();
NRF_LOG_FLUSH();
}
}
/** @} */
