/**
* @brief Checks if Temperature Sensor is ready for communication.
* @param DevAddress: Target device address
* @param Trials: Number of trials
* @retval HAL status
*/
uint16_t TSENSOR_IO_IsDeviceReady(uint16_t DevAddress, uint32_t Trials)
{
return (I2Cx_IsDeviceReady(DevAddress, Trials));
}
/**
* @brief Checks if target device is ready for communication.
* @note This function is used with Memory devices
* @param DevAddress: Target device address
* @param Trials: Number of trials
* @retval HAL status
*/
HAL_StatusTypeDef EEPROM_IO_IsDeviceReady(uint16_t DevAddress, uint32_t Trials)
{
return (I2Cx_IsDeviceReady(DevAddress, Trials));
}
int main(void) {
// Initialize the MCU clock system
SystemInit();
SystemCoreClockUpdate();
// Initialize debug output port (USART1)
USART1_HandleInit();
USART_Init(&hUSART1,USART_TX,2000000);
printf("\r\n---STM32L151RDT6---\r\n");
// I2C port initialization
if (I2Cx_Init(I2C1,400000) != I2C_SUCCESS) {
printf("I2C initialization failed\r\n");
while(1);
} else {
/*
// Scan I2C bus for all possible 7-bit addresses
printf("%sScan I2C bus:\r\n",sepstr);
for (i = 15; i < 127; i++) {
if (I2Cx_IsDeviceReady(I2C1,i << 1,10) == I2C_SUCCESS) printf(" respond: 0x%02X\r\n",i);
}
*/
}
// Check if LTC2942 is responding
printf("LTC2942 ping: ");
if (I2Cx_IsDeviceReady(LTC2942_I2C_PORT,LTC2942_ADDR,10) == I2C_SUCCESS) {
printf("OK\r\n");
} else {
printf("FAIL\r\n");
while(1);
}
printf(sepstr);
// Enable auto measurement of battery voltage and temperature
LTC2942_SetADCMode(LTC2942_ADC_AUTO);
// Enable analog section of the chip (in case if it disabled)
LTC2942_SetAnalog(LTC2942_AN_ENABLED);
// Set prescaler M value
// M=16 for 600mAh battery, the 1LSB of AC value is 0,010625mAh
// LTC2942_SetPrescaler(LTC2942_PSCM_16);
// M=8 for 400mAh battery, the 1LSB of AC value is 0,0053125mAh
LTC2942_SetPrescaler(LTC2942_PSCM_8);
// Disable AL/CC pin
LTC2942_SetALCCMode(LTC2942_ALCC_DISABLED);
// Program accumulated charge value for fully charged battery
// LTC2942_SetAC(0xFFFF);
while(1) {
// Battery voltage
i = LTC2942_GetVoltage();
// Chip temperature
j = LTC2942_GetTemperature();
// Accumulated charge
k = LTC2942_GetAC();
// Dump values to log
printf("Vbat: %.3uV Temp: %.2iC Charge: %.2u%% ~%umAh [0x%04X %u]\r\n",
i, /* Battery voltage */
j, /* Chip temperature */
(k * 10000) / 65535, /* Accumulated charge in percent */
(k * 85 * 8) / 128000, /* Very rough current charge capacity (8 - prescaler M value) */
// (k * 85 * 16) / 128000, /* Very rough current charge capacity (16 - prescaler M value) */
k, /* Raw accumulated charge (HEX) */
k /* Raw accumulated charge (DEC) */
);
// Dummy delay
for (i = 0x007FFFFF; i--; ) asm volatile ("nop");
}
}
