uint32_t ADC_getVal(void) {
uint32_t avg_Value = 0, tempC = 0;
ADCIntClear(ADC0_BASE, 1);
ADCProcessorTrigger(ADC0_BASE, 1);
while (!ROM_ADCIntStatus(ADC0_BASE, 1, false)) {
}
ADCSequenceDataGet(ADC0_BASE, 1, ADC_value);
avg_Value = (ADC_value[0] + ADC_value[1] + ADC_value[2] + ADC_value[3] + 2)
/ 4;
tempC = (1475 - ((2475 * avg_Value)) / 4096) / 10;
return tempC;
}
//*****************************************************************************
//
// The interrupt handler for the second timer interrupt. (temperature)
//
//*****************************************************************************
void
Timer1IntHandler(void)
{
//
// Clear the timer interrupt.
//
ROM_TimerIntClear(TIMER1_BASE, TIMER_TIMA_TIMEOUT);
//
// Clear ADC interrupt
//
ROM_ADCIntClear(ADC0_BASE, 3);
//Increment Timer A Count
TimerBCount++;
/*//
// Use the flags to Toggle the LED for this timer
//
GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_0, g_ui32Flags);*/
//
// Toggle the flag for the temperature timer.
//
HWREGBITW(&g_ui32InterruptFlags, 0) = 1;
//
// Trigger ADC Conversion
//
ROM_ADCProcessorTrigger(ADC0_BASE, 3);
//
//Wait for ADC conversion to complete
//
while(!ROM_ADCIntStatus(ADC0_BASE, 3, false)) { //Wait for ADC to finish sampling
}
ROM_ADCSequenceDataGet(ADC0_BASE, 3, adc_value); //Get data from Sequencer 3
//
// Update the interrupt status.
//
//ROM_IntMasterDisable();
//UARTprintf("ADC Value = %d\n", adc_value[0]); //Print out the first (and only) value
//ROM_IntMasterEnable();
}
int main(void)
{
uint32_t ui32ADC0Value[4];
volatile uint32_t ui32TempAvg;
volatile uint32_t ui32TempValueC;
volatile uint32_t ui32TempValueF;
ROM_SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_16MHZ);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ROM_ADCHardwareOversampleConfigure(ADC0_BASE, 64);
ROM_ADCSequenceConfigure(ADC0_BASE, 1, ADC_TRIGGER_PROCESSOR, 0);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 1, 0, ADC_CTL_TS);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 1, 1, ADC_CTL_TS);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 1, 2, ADC_CTL_TS);
ROM_ADCSequenceStepConfigure(ADC0_BASE,1,3,ADC_CTL_TS|ADC_CTL_IE|ADC_CTL_END);
ROM_ADCSequenceEnable(ADC0_BASE, 1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
ROM_ADCHardwareOversampleConfigure(ADC0_BASE, 64);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PA1_U0TX);
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_2);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 115200, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));
IntMasterEnable();
IntEnable(INT_UART0);
UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);
while(1)
{
if(mode == 0)
{
ROM_ADCIntClear(ADC0_BASE, 1);
ROM_ADCProcessorTrigger(ADC0_BASE, 1);
while(!ROM_ADCIntStatus(ADC0_BASE, 1, false))
{
}
ROM_ADCSequenceDataGet(ADC0_BASE, 1, ui32ADC0Value);
ui32TempAvg = (ui32ADC0Value[0] + ui32ADC0Value[1] + ui32ADC0Value[2] + ui32ADC0Value[3] + 2)/4;
ui32TempValueC = (1475 - ((2475 * ui32TempAvg)) / 4096)/10;
ui32TempValueF = ((ui32TempValueC * 9) + 160) / 5;
UARTStrPut("Current Temperature ");
UARTIntPut(ui32TempValueC);
UARTCharPut(UART0_BASE, 176);
UARTStrPut("C, Set Temperature ");
UARTIntPut(setTemp);
UARTCharPut(UART0_BASE, 176);
UARTStrPut("C\r\n");
int temp;
if (setTemp < ui32TempValueC) temp = 2; // red
else if (setTemp > ui32TempValueC) temp = 8; // green
else temp = 4; // blue if equal
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3, temp);
SysCtlDelay(SysCtlClockGet()/3);
}
}
}
void vTempDriverTask() //Code Credit to Tivaware Example temperature_sensor.c
{
uint32_t measurement[1];
uint32_t ui32TempValueC;
ROM_GPIOPinTypeADC(GPIO_PORTD_BASE, GPIO_PIN_0);
ROM_GPIOPinTypeADC(GPIO_PORTD_BASE, GPIO_PIN_1);
ROM_ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0); //D0
ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH15 | ADC_CTL_IE |
ADC_CTL_END);
ROM_ADCSequenceEnable(ADC0_BASE, 3);
ROM_ADCIntClear(ADC0_BASE, 3);
for(;;)
{
xSemaphoreTake(pollTempSem, portMAX_DELAY);
ROM_ADCProcessorTrigger(ADC0_BASE, 3);
// Wait for conversion to be completed.
while(!ROM_ADCIntStatus(ADC0_BASE, 3, false)) {}
// Clear the ADC interrupt flag.
ROM_ADCIntClear(ADC0_BASE, 3);
// Read ADC Value.
ROM_ADCSequenceDataGet(ADC0_BASE, 3, measurement);
ui32TempValueC = (uint32_t)(log(40960/(29.0*measurement[0]) - 10.0/29) * -1/0.041);
outputBuffer.tempR = ui32TempValueC;
//Switch to other Thermistor
ROM_ADCSequenceDisable(ADC0_BASE, 3);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH14 | ADC_CTL_IE | //D1
ADC_CTL_END);
ROM_ADCSequenceEnable(ADC0_BASE, 3);
//Begin ADC poll
ROM_ADCProcessorTrigger(ADC0_BASE, 3);
// Wait for conversion to be completed.
while(!ROM_ADCIntStatus(ADC0_BASE, 3, false)) {}
// Clear the ADC interrupt flag.
ROM_ADCIntClear(ADC0_BASE, 3);
// Read ADC Value.
ROM_ADCSequenceDataGet(ADC0_BASE, 3, measurement);
ui32TempValueC = (uint32_t)(log(40960/(29.0*measurement[0]) - 10.0/29) * -1/0.041);
outputBuffer.tempL = ui32TempValueC;
ROM_ADCSequenceDisable(ADC0_BASE, 3);
ROM_ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH15 | ADC_CTL_IE |
ADC_CTL_END);
ROM_ADCSequenceEnable(ADC0_BASE, 3);
}
}
