Hi.
I try use function ADCSequenceDataGet in interrupt ADC Sequence 0.
void ADCIntHandler(void)
{int I;
uint32_t pui32ADC0Value[6];
ADCIntClear(ADC0_BASE, 0);
while(!ADCIntStatus(ADC0_BASE, 0, false)) { }
ADCSequenceDataGet(ADC0_BASE, 0, &pui32ADC0Value[0]);
}
Inteerupt properly executed, but then there is an interrupt FaultISR (Hard Fault 0x3).
If I don't use ADCSequenceDataGet everything is working properly:
void ADCIntHandler(void)
{int I;
uint32_t pui32ADC0Value[6];
ADCIntClear(ADC0_BASE, 0);
while(!ADCIntStatus(ADC0_BASE, 0, false)) { }
//ADCSequenceDataGet(ADC0_BASE, 0, &pui32ADC0Value[0]);
}
SysCtrl init:
ui32SysClk =SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
ADC Init:
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
//
// For this example ADC0 is used with AIN0/1 on port E7/E6.
// The actual port and pins used may be different on your part, consult
// the data sheet for more information. GPIO port E needs to be enabled
// so these pins can be used.
// TODO: change this to whichever GPIO port you are using.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOK);
//
// Select the analog ADC function for these pins.
// Consult the data sheet to see which functions are allocated per pin.
// TODO: change this to select the port/pin you are using.
//
GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_1 | GPIO_PIN_3 );
GPIOPinTypeADC(GPIO_PORTK_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 );
// Enable sample sequence 3 with a processor signal trigger. Sequence 3
// will do a single sample when the processor sends a signal to start the
// conversion. Each ADC module has 4 programmable sequences, sequence 0
// to sequence 3. This example is arbitrarily using sequence 3.
//
ADCClockConfigSet(ADC0_BASE, ADC_CLOCK_SRC_PLL | ADC_CLOCK_RATE_EIGHTH, 30);
ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_TIMER, 0);
//
// Configure step 0 on sequence 3. Sample channel 0 (ADC_CTL_CH0) in
// differential mode (ADC_CTL_D) and configure the interrupt flag
// (ADC_CTL_IE) to be set when the sample is done. Tell the ADC logic
// that this is the last conversion on sequence 3 (ADC_CTL_END). Sequence
// 3 has only one programmable step. Sequence 1 and 2 have 4 steps, and
// sequence 0 has 8 programmable steps. Since we are only doing a single
// conversion using sequence 3 we will only configure step 0. For more
// information on the ADC sequences and steps, refer to the datasheet.
//
ADCSequenceStepConfigure(ADC0_BASE, 0, 0, ADC_CTL_CH0 );
ADCSequenceStepConfigure(ADC0_BASE, 0, 1, ADC_CTL_CH2 );
ADCSequenceStepConfigure(ADC0_BASE, 0, 2, ADC_CTL_CH16);
ADCSequenceStepConfigure(ADC0_BASE, 0, 3, ADC_CTL_CH17);
ADCSequenceStepConfigure(ADC0_BASE, 0, 4, ADC_CTL_CH18);
ADCSequenceStepConfigure(ADC0_BASE, 0, 5, ADC_CTL_CH19 | ADC_CTL_IE | ADC_CTL_END);
//
// Since sample sequence 3 is now configured, it must be enabled.
//
ADCSequenceEnable(ADC0_BASE, 0);
//
// Clear the interrupt status flag. This is done to make sure the
// interrupt flag is cleared before we sample.
//
ADCIntEnable(ADC0_BASE, 0);
IntEnable(INT_ADC0SS0);
ADCIntClear(ADC0_BASE, 0);
Timer init
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0); TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC); ui32Period1 = (ui32SysClk / 100) / 2; TimerLoadSet(TIMER0_BASE, TIMER_A, ui32Period1 -1); //TimerADCEventSet(TIMER0_BASE, TIMER_ADC_TIMEOUT_A); TimerControlTrigger(TIMER0_BASE, TIMER_A, true); TimerEnable(TIMER0_BASE, TIMER_A);
Please help, I do not know what to do
