ADC10 channel 只想設置A4 and A5

可以尝试下面两者方法之一

1 您使用单通道转换，在每次转换时触发一个中断，并在ISR内部切换通道并重新开始转换。

2 继续使用ADC10MCTL0 = ADC10INCH_5; //A0~A5，要从序列中选择一个样本的话，您可以让ADC10在每次转换时触发一个中断，并且在中断处理程序中，选择仅存储ISR的第五次和第六次调用的结果。

感謝回復

那請問如果用MSP430F530x_adc10_10.c這隻範例來改該怎麼修改呢?

#include <msp430.h>

unsigned char ADC_Result[3]; // 8-bit ADC conversion result array

int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop WDT

// Configure ADC10
ADC10CTL0 = ADC10SHT_2 | ADC10MSC | ADC10ON;// 16ADCclks, MSC, ADC ON
ADC10CTL1 = ADC10SHP | ADC10CONSEQ_1; // sampling timer, s/w trig.,single sequence
ADC10CTL2 &= ~ADC10RES; // 8-bit resolution
ADC10MCTL0 = ADC10INCH_2; // A0,A1,A2(EoS), AVCC reference

// Configure DMA0 (ADC10IFG trigger)
DMACTL0 = DMA0TSEL_24; // ADC10IFG trigger
__data16_write_addr((unsigned short) &DMA0SA,(unsigned long) &ADC10MEM0);
// Source single address
__data16_write_addr((unsigned short) &DMA0DA,(unsigned long) &ADC_Result[0]);
// Destination array address
DMA0SZ = 0x03; // 3 conversions
DMA0CTL = DMADT_4 | DMADSTINCR_3 | DMASRCBYTE | DMADSTBYTE | DMAEN | DMAIE;
// Rpt, inc dest, byte access,
// enable int after seq of convs
while(1)
{
while (ADC10CTL1 & ADC10BUSY); // Wait if ADC10 core is active
ADC10CTL0 |= ADC10ENC | ADC10SC; // Sampling and conversion start
__bis_SR_register(CPUOFF | GIE); // LPM0, ADC10_ISR will force exit
__delay_cycles(5000); // Delay between sequence convs
__no_operation(); // BREAKPOINT; check ADC_Result
}
}

#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 0: break; // No interrupt
case 2:
// sequence of conversions complete
__bic_SR_register_on_exit(CPUOFF); // exit LPM
break; // DMA0IFG
case 4: break; // DMA1IFG
case 6: break; // DMA2IFG
case 8: break; // Reserved
case 10: break; // Reserved
case 12: break; // Reserved
case 14: break; // Reserved
case 16: break; // Reserved
default: break;
}
}

这个例程的话是序列采样，采样A0-A2这3个通道的值，建议您使用第2种方法

可以让ADC10在每次转换时触发一个中断，并且在中断处理程序中，选择仅存储ISR的第五次和第六次调用的结果。