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部件号：MSP430F6736A 您好，
当我使用DMA将数据从ADC10传输到内存时，偶尔(在过去6个月中仅观察到两次)我注意到ADC模块卡住，无法正常工作。 我无法确定这是由于中断丢失还是模块卡住。 在ADC功能中，看门狗计时器被清除，但它在看门狗重置后不能恢复，但当我打开和关闭主板电源时，它会恢复。
下面是我的代码ADC10 -
// Initializing ADC10 module
void initAdc10(void) {
// Disable DMA and ADC
ADC10_A_disable(ADC10_A_BASE);
ADC10_A_clearInterrupt(ADC10_A_BASE, 0xff);
DMA_clearInterrupt(DMA_CHANNEL_0);
DMA_clearNMIAbort(DMA_CHANNEL_0);
DMA_disableInterrupt(DMA_CHANNEL_0);
DMA_disableTransfers(DMA_CHANNEL_0);
/* Delay */
__delay_cycles(2560000);
// Setup P1.2 A0, 1.1 A1, 1.0 A2
P1SEL |= BIT0 | BIT1 | BIT2; // Set P1.0,.1,.2 to non-IO
__disable_interrupt(); // Disable interrupts; Port Map cnfg
PMAPKEYID = PMAPKEY; // Enable access Port Mapping regs
P1MAP2 = PM_ANALOG; // Enable A0
P1MAP1 = PM_ANALOG; // Enable A1
P1MAP0 = PM_ANALOG; // Enable A2
PMAPKEYID = 0; // Disable access Port Mapping regs
__enable_interrupt(); // Re-enable all interrupts
// Setup ADC10
ADC10CTL0 = ADC10SHT_2 | ADC10MSC | ADC10ON; // 16ADCclks, MSC, ADC ON
ADC10CTL1 = ADC10SHP | ADC10CONSEQ_3; // pulse sample mode, repeated sequence
ADC10CTL2 = ADC10RES; // 10-bit resolution
ADC10MCTL0 = ADC10INCH_2; // A0,A1,A2(EoS), AVCC reference
// Setup DMA0 (ADC10IFG trigger)
DMACTL0 = DMA0TSEL_24; // ADC10IFG trigger
/* Read-modify-write disable */
//DMACTL0 = DMARMWDIS;
/* clear DMA interrupt flag */
DMA0CTL &= ~DMAIFG;
DMA0SZ = 192; // 192 conversions
__data20_write_long((uintptr_t) &DMA0SA, (uintptr_t) &ADC10MEM0);
// Source single address
__data20_write_long((uintptr_t) &DMA0DA, (uintptr_t) &ADC_Result[0]);
// Destination array address
DMA0CTL = DMADT_4 | DMADSTINCR_3 | DMASWDW | DMAEN | DMAIE;
}
Interrupt Code:
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=DMA_VECTOR
__interrupt void DMA0_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(DMA_VECTOR))) DMA0_ISR (void)
#else
#error Compiler not supported!
#endif
{
switch (__even_in_range(DMAIV, 16))
{
case DMAIV_NONE: break; // No interrupts
case DMAIV_DMA0IFG: // DMA0IFG = DMA Channel 0
ADC10CTL0 &= ~ADC10ENC; // conversions complete
dma_adc_flag = 2;
break;
case DMAIV_DMA1IFG: break; // DMA1IFG = DMA Channel 1
case DMAIV_DMA2IFG: break; // DMA2IFG = DMA Channel 2
case 8: break; // Reserved
case 10: break; // Reserved
case 12: break; // Reserved
case 14: break; // Reserved
case 16: break; // Reserved
default: break;
}
}
Main Function:
int dma_adc_flag = 0;
void Adc10Main(void) {
if (ADC10CTL1 & ADC10BUSY) {
return;
}
if (!dma_adc_flag) {
ADC10CTL0 |= ADC10ENC | ADC10SC; // Sampling and conversion start
dma_adc_flag = 1;
return;
} else if (dma_adc_flag == 1) {
return;
}
dma_adc_flag = 0;
/* Clear Watchdog Timer */
WDT_A_resetTimer(WDT_A_BASE);
}
请帮我解决这个问题吗？ 提前感谢。
拉胡尔
