void UpdateAnalogs(void)
{
ADC_StartConversion(AT91C_BASE_ADC1);
while((ADC_GetStatus(AT91C_BASE_ADC1) & 0x80) != 0x80) nop();
//g_AnalogReading[0] = ADC_GetConvertedData(AT91C_BASE_ADC1,0);
g_AnalogReading[1] = ADC_GetConvertedData(AT91C_BASE_ADC1,1);
g_AnalogReading[2] = ADC_GetConvertedData(AT91C_BASE_ADC1,2);
g_AnalogReading[3] = ADC_GetConvertedData(AT91C_BASE_ADC1,3);
g_AnalogReading[4] = ADC_GetConvertedData(AT91C_BASE_ADC1,4);
g_AnalogReading[5] = ADC_GetConvertedData(AT91C_BASE_ADC1,5);
g_AnalogReading[6] = ADC_GetConvertedData(AT91C_BASE_ADC1,6);
g_AnalogReading[7] = ADC_GetConvertedData(AT91C_BASE_ADC1,7);
switch(g_BatteryCounter) {
case 0:
g_AnalogReading[0] = ADC_GetConvertedData(AT91C_BASE_ADC1, 0);
SelectBattV();
break;
case 1:
CalculateBatteryPower(ADC_GetConvertedData(AT91C_BASE_ADC1, 0));
SelectAng0();
break;
case BATTV_PERIOD:
g_BatteryCounter = -1;
default:
g_AnalogReading[0] = ADC_GetConvertedData(AT91C_BASE_ADC1, 0);
}
g_BatteryCounter++;
}
void ADC_IrqHandler(void)
{
Adc *pAdc = ADC;
int32_t dwLowPotThreshold, dwHighPotThreshold;
volatile uint32_t dummy = 0;
/* Read the status to ack the IT */
dummy = ADC_GetStatus(ADC);
/* Get the potentiometer initial value */
gdwPotentiometerValue = ADC_GetConvertedData(pAdc, ADC_CHANNEL_5);
/* Read LCDR to clear DRDY bit */
dummy = ADC_GetLastConvertedData(pAdc);
/* Set Window threshold according to the initial values */
dwLowPotThreshold = gdwPotentiometerValue - (NB_INTERVALS * (0x1000 / 256));
if (dwLowPotThreshold < 0)
dwLowPotThreshold = 0;
dwHighPotThreshold = gdwPotentiometerValue + (NB_INTERVALS * (0x1000 / 256));
if (dwHighPotThreshold >= 0x1000)
dwHighPotThreshold = 0x1000 - 1;
/* Normalize the value 0 -> 255 */
gdwPotentiometerValue = (gdwPotentiometerValue * 256) / 0xFFF;
/* Post Message */
WGT_SendMessageISR( WGT_MSG_KEY_PRESSED, WGT_KEY_VR1, 255 - gdwPotentiometerValue ) ;
/* Setup Threshold*/
ADC_SetComparisonWindow(pAdc,((dwHighPotThreshold<<16)|dwLowPotThreshold));
}
static void ISR_ADC(void) {
int status = ADC_GetStatus(AT91C_BASE_ADC);
char_display_number(33);
if (ADC_IsChannelInterruptStatusSet(status, POT_CHANNEL)) {
//gets the new value from ADC
pot_current_value = ADC_GetConvertedData(AT91C_BASE_ADC, POT_CHANNEL);
char_display_number((pot_current_value - 25) / 10);
//char_display_number(44);
//starts the converter running again
ADC_StartConversion(AT91C_BASE_ADC);
}
}
static uint32_t _WFE_Potentiometer_Initialize( void )
{
Adc *pAdc = ADC;
int32_t dwLowPotThreshold, dwHighPotThreshold;
/* STEP1: Realize a first measure to get potentiometer's initial position */
/* Initialize ADC*/
ADC_Initialize( pAdc,ID_ADC, ADC_MR_TRGEN_DIS,/*HARDWARE trigger*/
0,ADC_MR_SLEEP_NORMAL,ADC_MR_LOWRES_12_BIT,
BOARD_MCK,BOARD_ADC_FREQ,10,20);
/*Enable channel 5 (potentiometer) */
ADC_EnableChannel(pAdc, ADC_CHANNEL_5);
/* Start convrsion */
ADC_StartConversion(pAdc);
/* Wait for the end of conversion */
while ( !(ADC_GetStatus(pAdc) & ADC_ISR_EOC5) ) {}
/* Get the potentiometer initial value */
gdwPotentiometerValue = ADC_GetConvertedData(pAdc, ADC_CHANNEL_5);
/* Set Window threshold according to the initial values */
dwLowPotThreshold = gdwPotentiometerValue - (NB_INTERVALS * (0x1000 / 256));
if (dwLowPotThreshold < 0)
dwLowPotThreshold = 0;
dwHighPotThreshold = gdwPotentiometerValue + (NB_INTERVALS * (0x1000 / 256));
if (dwHighPotThreshold >= 0x1000)
dwHighPotThreshold = 0x1000 - 1;
/* Normalize the value 0 -> 255 */
gdwPotentiometerValue = (gdwPotentiometerValue * 256) / 0xFFF;
/* STEP2: Re configure ADC to use windowing */
/* Initialize ADC*/
ADC_Initialize( pAdc,ID_ADC, ADC_MR_TRGEN_EN,/*HARDWARE trigger*/
ADC_MR_TRGSEL_ADC_TRIG0,ADC_MR_SLEEP_NORMAL,ADC_MR_LOWRES_12_BIT,
BOARD_MCK,BOARD_ADC_FREQ,10,20);
/*Enable channel 5 (potentiometer) */
ADC_EnableChannel(pAdc, ADC_CHANNEL_5);
/* Configure TC*/
ConfigureTc0();
/*Channel 5 has to be compared*/
ADC_SetCompareChannel(pAdc, ADC_CHANNEL_5);
/*Compare mode, in the window*/
ADC_SetCompareMode(pAdc, ADC_EMR_CMPMODE_OUT);
/* Setup Threshold*/
ADC_SetComparisonWindow(pAdc,((dwHighPotThreshold<<16)|dwLowPotThreshold));
/* enable adc interrupt*/
NVIC_EnableIRQ(ADC_IRQn);
/* Enable Compare Interrupt*/
ADC_EnableIt(pAdc, ADC_IDR_COMPE);
/* Start TC0 and hardware trigger*/
TC_Start(TC0,0);
return SAMGUI_E_OK ;
}
