capturepwmdisplay去掉pwm信号还是进回调callback

你好，我想问下cc3220在用capturepwmdisplay捕捉pwm上升沿的时候，程序里捕捉模式设的是上升沿捕捉，每捕捉一个上升沿，就会触发中断，进入capture的回调函数capturecallback（），回调函数显示捕获的脉冲个数，但是现在即使把pwm信号移除，程序还是不停的进中断，继续计数，这是怎么回事，按理说没有pwm信号了它就应该一直等待上升沿啊，怎么会还像之前一样进中断，计脉冲个数呢？

Susan Yang：

回复 user5288687:

很高兴您能解决问题！

user5288687：

回复 Susan Yang:

这个问题解决了，不过程序里有两个地方不是特别懂

程序里我设置的是捕获上升沿，当开始捕捉后，应该捕捉到一个上升沿就进一次capturecallback回调函数，然后semaphorep_post和while循环里的semaphorep_pend两个函数在这里具体是什么意思呢？是进一次中断，变量加1后就跳到while循环打印变量值？然后while循环里打印变量值后检测到上升沿再跳到capturecallback，如此往复吗？主要是两个semaphore_p函数的功能不太清楚。谢谢！

user5288687：

回复 Susan Yang:

我现在要捕获脉冲上升沿，并计数无线发送到TCP server，主要程序段如下，之前试了在缓冲区放一组数可以发送成功，当把这段capture相关函数加进来，然后在capture的回调函数里发送就不行，TCP server接收不到数据。

void captureCallback(Capture_Handle handle, uint32_t count);
uint32_t curCount = 0;
static SemaphoreP_Handle captureSem;
int32_tsock;
int32_tstatus;
int32_t TCPClient()
{SlSockAddr_t*sa;int32_taddrSize;sockAddr_tsAddr;
/* filling the TCP server socket address */sAddr.in4.sin_family = SL_AF_INET;sAddr.in4.sin_port = sl_Htons(6000);sAddr.in4.sin_addr.s_addr = sl_Htonl(SL_IPV4_VAL(192,168,1,100));
sa = (SlSockAddr_t*)&sAddr.in4;addrSize = sizeof(SlSockAddrIn_t);
/* Get socket descriptor – this would be the* socket descriptor for the TCP session.*/sock = sl_Socket(SL_AF_INET, SL_SOCK_STREAM, TCP_PROTOCOL_FLAGS);ASSERT_ON_ERROR(sock, SL_SOCKET_ERROR);
status = -1;
while(status < 0){/* Calling 'sl_Connect' followed by server's* 'sl_Accept' would start session with* the TCP server. */status = sl_Connect(sock, sa, addrSize);
if(status < 0){UART_PRINT("[line:%d, error:%d] %s\n\r", __LINE__, status, SL_SOCKET_ERROR);sl_Close(sock);return -1;}
break;}
SemaphoreP_Params semParams;Capture_Params captureParams;Capture_Handle capture;
Capture_init();
UART_PRINT("Init succeed!\n\r");
/* Semaphore to wait for capture data */SemaphoreP_Params_init(&semParams);semParams.mode = SemaphoreP_Mode_BINARY;captureSem = SemaphoreP_create(0, &semParams);
if (captureSem == NULL){UART_PRINT("SemaphoreP_create failed!\n\r");while(1);}
/* Setting up the Capture driver to detect two rising edges and reportthe result in microseconds*/Capture_Params_init(&captureParams);captureParams.mode = CAPTURE_MODE_RISING_RISING;captureParams.periodUnit = CAPTURE_PERIOD_COUNTS;captureParams.callbackFxn = captureCallback;
capture = Capture_open(Board_CAPTURE1, &captureParams);if (capture == NULL){UART_PRINT("Failed to initialized Capture!\n");while(1);}
UART_PRINT("About to Capture!\n");
Capture_start(capture);

return 0;
}

void captureCallback(Capture_Handle handle, uint32_t count)
{curCount += 1;UART_PRINT("%d", curCount);status = sl_Send(sock, &curCount, sizeof(curCount), 0);SemaphoreP_post(captureSem);
}