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fix modbus read dead slave cause wdt timeout

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This commit is contained in:
aleks
2022-05-13 15:15:17 +02:00
parent 9ea75ab793
commit 2733ceae72
2 changed files with 10 additions and 5 deletions
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1
freemodbus/port/port.h
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@@ -90,6 +90,7 @@
#define MB_TCP_SEND_TIMEOUT_MS (500) // send event timeout in mS
#define MB_TCP_SEND_TIMEOUT (pdMS_TO_TICKS(MB_TCP_SEND_TIMEOUT_MS))
#define MB_TCP_PORT_MAX_CONN (CONFIG_FMB_TCP_PORT_MAX_CONN)
#define MB_TCP_PORT_RESPOND_TIMEOUT (CONFIG_FMB_MASTER_TIMEOUT_MS_RESPOND * 1000)
#define MB_TCP_FRAME_LOG_BUFSIZE (256)

14
freemodbus/tcp_master/port/port_tcp_master.c
View File

@@ -286,18 +286,22 @@ static int xMBTCPPortMasterGetBuf(MbSlaveInfo_t* pxInfo, UCHAR* pucDstBuf, USHOR
int xLength = 0;
UCHAR* pucBuf = pucDstBuf;
USHORT usBytesLeft = usLength;
struct timeval xTime;
MB_PORT_CHECK((pxInfo && pxInfo->xSockId > -1), -1, "Try to read incorrect socket = #%d.", pxInfo->xSockId);
// Set receive timeout for socket <= slave respond time
xTime.tv_sec = 0;
xTime.tv_usec = MB_TCP_PORT_RESPOND_TIMEOUT;
setsockopt(pxInfo->xSockId, SOL_SOCKET, SO_RCVTIMEO, &xTime, sizeof(xTime));
// Receive data from connected client
while (usBytesLeft > 0) {
xMBTCPPortMasterCheckShutdown();
// none blocking read from socket with timeout
xLength = recv(pxInfo->xSockId, pucBuf, usBytesLeft, MSG_DONTWAIT);
xLength = recv(pxInfo->xSockId, pucBuf, usBytesLeft, 0);
if (xLength < 0) {
if (errno == EAGAIN) {
// Read timeout occurred, continue reading
continue;
} else if (errno == ENOTCONN) {
// Socket connection closed
ESP_LOGE(TAG, "Socket(#%d)(%s) connection closed.",
@@ -316,7 +320,6 @@ static int xMBTCPPortMasterGetBuf(MbSlaveInfo_t* pxInfo, UCHAR* pucDstBuf, USHOR
if (xMBTCPPortMasterGetRespTimeLeft(pxInfo) == 0) {
return ERR_TIMEOUT;
}
vTaskDelay(1);
}
return usLength;
}
@@ -847,12 +850,13 @@ static void vMBTCPPortMasterTask(void *pvParameters)
pxCurrInfo->xIndex, pxCurrInfo->xSockId, pxCurrInfo->pcIpAddr);
} else if ((xRet == ERR_TIMEOUT) || (xMBTCPPortMasterGetRespTimeLeft(pxCurrInfo) == 0)) {
// Timeout occurred when receiving frame, process respond timeout
xMBTCPPortMasterFsmSetError(EV_ERROR_RESPOND_TIMEOUT, EV_MASTER_ERROR_PROCESS);
ESP_LOGD(TAG, MB_SLAVE_FMT(", frame read timeout."),
pxCurrInfo->xIndex, pxCurrInfo->xSockId, pxCurrInfo->pcIpAddr);
} else if (xRet == ERR_BUF) {
// After retries a response with incorrect TID received, process failure.
xMBTCPPortMasterFsmSetError(EV_ERROR_RECEIVE_DATA, EV_MASTER_ERROR_PROCESS);
ESP_LOGD(TAG, MB_SLAVE_FMT(", frame error."),
ESP_LOGW(TAG, MB_SLAVE_FMT(", frame error."),
pxCurrInfo->xIndex, pxCurrInfo->xSockId, pxCurrInfo->pcIpAddr);
} else {
ESP_LOGE(TAG, MB_SLAVE_FMT(", critical error=%d."),