TI中文支持网Part Number:TMS320F28375SOther Parts Discussed in Thread:C2000WARE
我用信号发生器生成一个方波，输入到Ecap的引脚，设置触发源为EVENT_4，补货为连续捕获模式，但是不知道为什么只能进入一次中断，麻烦帮忙看看是哪里有问题
这是初始化的代码
void initECAP()
{//// Disable ,clear all capture flags and interrupts//ECAP_disableInterrupt(ECAP1_BASE,(ECAP_ISR_SOURCE_CAPTURE_EVENT_1 |ECAP_ISR_SOURCE_CAPTURE_EVENT_2 |ECAP_ISR_SOURCE_CAPTURE_EVENT_3 |ECAP_ISR_SOURCE_CAPTURE_EVENT_4 |ECAP_ISR_SOURCE_COUNTER_OVERFLOW |ECAP_ISR_SOURCE_COUNTER_PERIOD|ECAP_ISR_SOURCE_COUNTER_COMPARE));ECAP_clearInterrupt(ECAP1_BASE,(ECAP_ISR_SOURCE_CAPTURE_EVENT_1 |ECAP_ISR_SOURCE_CAPTURE_EVENT_2 |ECAP_ISR_SOURCE_CAPTURE_EVENT_3 |ECAP_ISR_SOURCE_CAPTURE_EVENT_4 |ECAP_ISR_SOURCE_COUNTER_OVERFLOW |ECAP_ISR_SOURCE_COUNTER_PERIOD|ECAP_ISR_SOURCE_COUNTER_COMPARE));//// Disable CAP1-CAP4 register loads//ECAP_disableTimeStampCapture(ECAP1_BASE);//// Configure eCAP//Enable capture mode.//One shot mode, stop capture at event 4.//Set polarity of the events to rising, falling, rising, falling edge.//Set capture in time difference mode.//Select input from XBAR7.//Enable eCAP module.//Enable interrupt.//ECAP_stopCounter(ECAP1_BASE);ECAP_enableCaptureMode(ECAP1_BASE);ECAP_setCaptureMode(ECAP1_BASE, ECAP_CONTINUOUS_CAPTURE_MODE, ECAP_EVENT_4);ECAP_setEventPolarity(ECAP1_BASE, ECAP_EVENT_1, ECAP_EVNT_FALLING_EDGE);ECAP_setEventPolarity(ECAP1_BASE, ECAP_EVENT_2, ECAP_EVNT_FALLING_EDGE);ECAP_setEventPolarity(ECAP1_BASE, ECAP_EVENT_3, ECAP_EVNT_FALLING_EDGE);ECAP_setEventPolarity(ECAP1_BASE, ECAP_EVENT_4, ECAP_EVNT_FALLING_EDGE);ECAP_enableCounterResetOnEvent(ECAP1_BASE, ECAP_EVENT_1);ECAP_enableCounterResetOnEvent(ECAP1_BASE, ECAP_EVENT_2);ECAP_enableCounterResetOnEvent(ECAP1_BASE, ECAP_EVENT_3);ECAP_enableCounterResetOnEvent(ECAP1_BASE, ECAP_EVENT_4);XBAR_setInputPin(XBAR_INPUT7, 19);ECAP_enableLoadCounter(ECAP1_BASE);ECAP_setSyncOutMode(ECAP1_BASE, ECAP_SYNC_OUT_DISABLED);ECAP_startCounter(ECAP1_BASE);ECAP_enableTimeStampCapture(ECAP1_BASE);ECAP_reArm(ECAP1_BASE);ECAP_enableInterrupt(ECAP1_BASE, ECAP_ISR_SOURCE_CAPTURE_EVENT_4);
}
这是中断的代码
__interrupt void ecap1ISR(void)
{//// Get the capture counts. Each capture should be 4x the ePWM count// because of the ePWM clock dividers.//cap1Count = ECAP_getEventTimeStamp(ECAP1_BASE, ECAP_EVENT_1);cap2Count = ECAP_getEventTimeStamp(ECAP1_BASE, ECAP_EVENT_2);cap3Count = ECAP_getEventTimeStamp(ECAP1_BASE, ECAP_EVENT_3);cap4Count = ECAP_getEventTimeStamp(ECAP1_BASE, ECAP_EVENT_4);calc_pulse1 = cap4Count - cap1Count;calc_time = calc_pulse1 * 5.1282051282 * 10e-9;rpm = 1/calc_time*20;ECAP_clearInterrupt(ECAP1_BASE,ECAP_ISR_SOURCE_CAPTURE_EVENT_4);ECAP_clearGlobalInterrupt(ECAP1_BASE);// Start eCAP//ECAP_reArm(ECAP1_BASE);//// Acknowledge the group interrupt for more interrupts.//Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP4);
}
Ben Qin：
你好，你有参考过C2000Ware中的例程吗？C:\ti\c2000\C2000Ware_4_03_00_00\driverlib\f2837xs\examples\cpu1\ecap
