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最近在使用MSP430AFE253的SD_24进行数据采集，使用的是外部的1.25V的基准电源，但是3块板子的AD输出的数据都衰减了，只有理论输出的84%。不知道是什么原因，请专家指导一下！
附上SD24_A的配置文件：
void Init_ADC(void){ SD24CTL = SD24DIV_3+SD24SSEL0 ; // 1.2V ref, SMCLK SD24CCTL0 |= SD24LSBTOG+SD24SNGL+SD24IE ; // Single conv, enable interrupt SD24INCTL0 |= SD24INTDLY1; SD24CCTL0 |= SD24SC; // Set bit to start conversion}
你好,
不确定你是否有通过中断方式获取值? 同时加入一段延时如下:
for (i = 0; i < 0x3600; i++); // Delay for 1.2V ref startup SD24CCTL2 |= SD24SC; // Set bit to start conversion __bis_SR_register(LPM0_bits + GIE); // Enter LPM0 w/ interrupts}
是否有改善?
