TI中文支持网参考此篇文章http://www.deyisupport.com/question_answer/microcontrollers/hercules/f/70/p/145464/410855.aspx 设置使用ADC Group 0(Event)可以成功触发.
参考此篇文章http://www.ti.com/lit/an/spna227/spna227.pdf 设置使用ADC Group 1 SW无法触发.
觉得很疑惑,为何group 1,2会无法触发.
程序设置:
void sysInit(void)
{
hetInit();
initEPWM();
ecapInit();
mibspiInit();
canInit();
gioInit();
gioEnableNotification(gioPORTA, 0);
gioEnableNotification(gioPORTA, 1);
adcInit();
rtiInit();
rtiEnableNotification(rtiNOTIFICATION_COMPARE0);
rtiEnableNotification(rtiNOTIFICATION_COMPARE1);
adcEnableNotification(adcREG1,adcGROUP0);
adcEnableNotification(adcREG1,adcGROUP1);
adcStartConversion(adcREG1,adcGROUP1); //Fail
// adcStartConversion(adcREG1, adcGROUP0); //OK
_enable_interrupt_();
pin_array_Init();
rtiStartCounter(rtiCOUNTER_BLOCK0);
}
检测void rtiNotification(uint32 notification){}
RTI 100us都会进入
检测void adcNotification ( adcBASE_t *adc, uint32 group){}
开启adcStartConversion(adcREG1,adcGROUP1);时不会触发
开启 adcStartConversion(adcREG1, adcGROUP0); 时可以触发
设置都是一样的“Use Alternate ADC “Trigger Option A”
这看起来EVENT vs Group1都很相似, one pass/ one fail 能有一个说明吗?
David Bai1：
Hi Ray,
EVENT Group (or group0) 跟group1和group2还是有差异的，就像你上面提及链接中的spna227.pdf有介绍：
Group0 can only be triggered by an edge on the selected trigger signal, while group1 and group2 are software-triggered by default.Group1 and group2 can also be configured to be edge-triggered. Table 1 summarizes the options for triggering any of the three conversion groups using an edge-trigger signal.
1. 首先你需要在PINMUX中确认一下，你是否勾选了Use Alternate ADC “Trigger Option-A”；
2. 若勾选了OptionA，则需要根据TMS570LS0714数据手册中的MIBADC1 Event Trigger Hookup表，确认Trigger Event Signal中对应的PINMMR30[]的配置是否正确。
