Part Number: TM4C1294NCPDT
Other Parts Discussed in Thread: EK-TM4C1294XL,
Tool/software: Code Composer Studio
Hello, I'm trying to use the ADC0 module on the TM4C1294XL board with PE1 as the analog input. I'm trying to use interrupts for the sampling but the interrupts aren't triggering. Could you look at my code and see what's wrong? Thank you.
main:
#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_adc.h"
#include "inc/hw_types.h"
#include "driverlib/adc.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
#include "inc/tm4c1294ncpdt.h"
volatile static uint32_t adcResult = 0;
void ADC0SS3_Handler(void) //interrupt function
{
adcResult = ADC0_SSFIFO3_R; //stores digital value in variable
ADCIntClear(ADC0_BASE, 3); //clears interrupt flag
}
int main()
{
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0); //enables clocks for ADC and GPIO
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_1); //configures PE1 for analog ADC input
IntDisable(INT_ADC0SS3); //disables modules for configuration
ADCIntDisable(ADC0_BASE, 3);
ADCSequenceDisable(ADC0_BASE, 3);
ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_ALWAYS, 0); //configures ADC0 to continuously trigger
ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH0 | ADC_CTL_END |ADC_CTL_IE); //ADC calls an interrupt when conversion step is complete
ADCSequenceEnable(ADC0_BASE, 3); //enables sample sequencer
ADCIntClear(ADC0_BASE, 3); //enables interrupts
ADCIntEnable(ADC0_BASE, 3);
IntEnable(INT_ADC0SS3);
IntMasterEnable();
while(1) //dead loop
{
{}
}
return 0;
}
startup:
#include <stdint.h>
volatile static uint32_t adcResult = 0;
//*****************************************************************************
//
// Forward declaration of the default fault handlers.
//
//*****************************************************************************
void ResetISR(void);
static void NmiSR(void);
static void FaultISR(void);
static void IntDefaultHandler(void);
//*****************************************************************************
//
// External declaration for the reset handler that is to be called when the
// processor is started
//
//*****************************************************************************
extern void _c_int00(void);
//*****************************************************************************
//
// Linker variable that marks the top of the stack.
//
//*****************************************************************************
extern uint32_t __STACK_TOP;
//*****************************************************************************
//
// External declarations for the interrupt handlers used by the application.
//
//*****************************************************************************
extern void ADC0SS3_Handler(void);
//*****************************************************************************
//
// The vector table. Note that the proper constructs must be placed on this to
// ensure that it ends up at physical address 0x0000.0000 or at the start of
// the program if located at a start address other than 0.
//
//*****************************************************************************
#pragma DATA_SECTION(g_pfnVectors, ".intvecs")
void (* const g_pfnVectors[])(void) =
{
(void (*)(void))((uint32_t)&__STACK_TOP),
// The initial stack pointer
ResetISR, // The reset handler
NmiSR, // The NMI handler
FaultISR, // The hard fault handler
IntDefaultHandler, // The MPU fault handler
IntDefaultHandler, // The bus fault handler
IntDefaultHandler, // The usage fault handler
0, // Reserved
0, // Reserved
0, // Reserved
0, // Reserved
IntDefaultHandler, // SVCall handler
IntDefaultHandler, // Debug monitor handler
0, // Reserved
IntDefaultHandler, // The PendSV handler
IntDefaultHandler, // The SysTick handler
IntDefaultHandler, // GPIO Port A
IntDefaultHandler, // GPIO Port B
IntDefaultHandler, // GPIO Port C
IntDefaultHandler, // GPIO Port D
IntDefaultHandler, // GPIO Port E
IntDefaultHandler, // UART0 Rx and Tx
IntDefaultHandler, // UART1 Rx and Tx
IntDefaultHandler, // SSI0 Rx and Tx
IntDefaultHandler, // I2C0 Master and Slave
IntDefaultHandler, // PWM Fault
IntDefaultHandler, // PWM Generator 0
IntDefaultHandler, // PWM Generator 1
IntDefaultHandler, // PWM Generator 2
IntDefaultHandler, // Quadrature Encoder 0
IntDefaultHandler, // ADC Sequence 0
IntDefaultHandler, // ADC Sequence 1
IntDefaultHandler, // ADC Sequence 2
ADC0SS3_Handler, // ADC Sequence 3
...
