/** function loads calibration table from EEPROM, validate it and if OK uses it */
static void touch_LoadCalibration(void)
{
I2C_Init_TypeDef i2cInit = I2C_INIT_DEFAULT;
uint32_t temp, checksum;
int count;
MATRIX new_matrix;
/* Initialize I2C driver, using standard rate. Devices on DK itself */
/* supports fast mode, but in case some slower devices are added on */
/* prototype board, we use standard mode. */
I2CDRV_Init(&i2cInit);
count = EEPROM_Read(I2C0, EEPROM_DVK_ADDR, CALIBRATION_EEPROM_OFFSET, (uint8_t*) &temp, sizeof(temp));
count += EEPROM_Read(I2C0, EEPROM_DVK_ADDR, CALIBRATION_EEPROM_OFFSET + 4, (uint8_t*) &new_matrix, sizeof(new_matrix));
if (count == sizeof(new_matrix) + 4)
{
if (temp == CALIBRATION_MAGIC_NUMBER)
{
checksum = touch_CountChecksum(temp, (uint32_t*) &new_matrix, sizeof(new_matrix) / 4);
count = EEPROM_Read(I2C0, EEPROM_DVK_ADDR, CALIBRATION_EEPROM_OFFSET + 4 + sizeof(new_matrix), (uint8_t*) &temp, sizeof(temp));
if (temp == checksum)
{ /* looks like calibration table is valid */
ADC_IntDisable(ADC0, ADC_IF_SINGLE); /* we need to disable ADC interrupt to avoid current_pos structure update for a while */
memcpy(&calibrationMatrix, &new_matrix, sizeof(calibrationMatrix));
ADC_IntEnable(ADC0, ADC_IF_SINGLE);
}
}
}
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
I2C_Init_TypeDef i2cInit = I2C_INIT_DEFAULT;
TEMPSENS_Temp_TypeDef temp;
/* Define previous temp to invalid, just to ensure update first time */
TEMPSENS_Temp_TypeDef prevTemp = {1000, 0};
int prevShowFahrenheit = showFahrenheit;
/* Initialize DK board register access */
BSP_Init(BSP_INIT_DEFAULT);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
/* Initialize TFT */
RETARGET_SerialInit();
printf("\nEFM32 I2C temperature sensor example\n\n");
/* Enable board control interrupts */
BSP_InterruptDisable(0xffff);
BSP_InterruptFlagsClear(0xffff);
BSP_InterruptEnable(BC_INTEN_JOYSTICK);
temperatureIRQInit();
/* Initialize I2C driver, using standard rate. Devices on DK itself */
/* supports fast mode, but in case some slower devices are added on */
/* prototype board, we use standard mode. */
I2CDRV_Init(&i2cInit);
/* Main loop - just read temperature and update LCD */
while (1)
{
if (TEMPSENS_TemperatureGet(I2C0,
TEMPSENS_DK_ADDR,
&temp) < 0)
{
printf("ERROR\n");
/* Enter EM2, no wakeup scheduled */
EMU_EnterEM2(true);
}
/* Update LCD display if any change. This is just an example of how */
/* to save some energy, since the temperature normally is quite static. */
/* The compare overhead is much smaller than actually updating the display. */
if ((prevTemp.i != temp.i) ||
(prevTemp.f != temp.f) ||
(prevShowFahrenheit != showFahrenheit))
{
temperatureUpdate(&temp);
}
prevTemp = temp;
prevShowFahrenheit = showFahrenheit;
/* Read every 2 seconds which is more than it takes worstcase to */
/* finish measurement inside sensor. */
RTCDRV_Trigger(2000, NULL);
EMU_EnterEM2(true);
}
}
/**************************************************************************//**
* @brief Main function
*****************************************************************************/
int main(void)
{
I2C_Init_TypeDef i2cInit = I2C_INIT_DEFAULT;
uint8_t data[3];
/* Initialize DK board register access */
BSP_Init(BSP_INIT_DEFAULT);
/* If first word of user data page is non-zero, enable eA Profiler trace */
BSP_TraceProfilerSetup();
/* Initialize TFT */
RETARGET_SerialInit();
printf("\nEFM32 I2C EEPROM example\n\n");
/* Enable board control interrupts */
BSP_InterruptDisable(0xffff);
BSP_InterruptFlagsClear(0xffff);
BSP_InterruptEnable(BC_INTEN_JOYSTICK);
BSP_InterruptEnable(BC_INTEN_PB);
eepromtestIRQInit();
/* Initialize I2C driver, using standard rate. Devices on DK itself */
/* supports fast mode, but in case some slower devices are added on */
/* prototype board, we use standard mode. */
I2CDRV_Init(&i2cInit);
/* Main loop - just read data and update LCD */
while (1)
{
/* Should data be reset to factory default? */
if (eepromReset)
{
eepromReset = false;
/* Data changed by user? */
data[0] = 0xFF;
data[1] = 0xFF;
data[2] = 0xFF;
if (EEPROM_Write(I2C0, EEPROM_DVK_ADDR, 0, data, 3) < 0)
{
printf("RST ERR\n");
/* Enter EM2, no wakeup scheduled */
EMU_EnterEM2(true);
}
}
if (EEPROM_Read(I2C0, EEPROM_DVK_ADDR, 0, data, 3) < 0)
{
printf("RD ERR\n");
/* Enter EM2, no wakeup scheduled */
EMU_EnterEM2(true);
}
eepromData = data[0];
eepromtestUpdateLCD(data);
/* Just enter EM2 until joystick pressed */
EMU_EnterEM2(true);
/* Data changed by user? */
if (eepromData != data[0])
{
data[0] = eepromData;
data[1] = eepromData + 1;
data[2] = eepromData + 2;
if (EEPROM_Write(I2C0, EEPROM_DVK_ADDR, 0, data, 3) < 0)
{
printf("WR ERR\n");
/* Enter EM2, no wakeup scheduled */
EMU_EnterEM2(true);
}
}
}
}
