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Attempt to provide a Windows implementation of timeouts handling in UART

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This commit is contained in:
Romuald Conty 2011-09-30 14:02:51 +00:00
parent 8c7b61eaba
commit afd015f1b7
1 changed files with 33 additions and 16 deletions
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49
libnfc/buses/uart_win32.c
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@ -119,19 +119,6 @@ uart_set_speed (serial_port sp, const uint32_t uiPortSpeed)
};
spw = (serial_port_windows *) sp;
// Set timeouts
int iTimeout = 200;
spw->ct.ReadIntervalTimeout = 2;
spw->ct.ReadTotalTimeoutMultiplier = 0;
spw->ct.ReadTotalTimeoutConstant = iTimeout;
spw->ct.WriteTotalTimeoutMultiplier = iTimeout;
spw->ct.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts (spw->hPort, &spw->ct)) {
log_put (LOG_CATEGORY, NFC_PRIORITY_ERROR, "Unable to apply new timeout settings.");
return;
}
// Set baud rate
spw->dcb.BaudRate = uiPortSpeed;
if (!SetCommState (spw->hPort, &spw->dcb)) {
@ -152,13 +139,29 @@ uart_get_speed (const serial_port sp)
}
int
uart_receive (serial_port sp, byte_t * pbtRx, const size_t szRx, void * abort_p)
uart_receive (serial_port sp, byte_t * pbtRx, const size_t szRx, void * abort_p, struct timeval *timeout)
{
DWORD dwBytesToGet = (DWORD)szRx;
DWORD dwBytesReceived = 0;
DWORD dwTotalBytesReceived = 0;
BOOL res;
// XXX Put this part into uart_win32_timeouts () ?
COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = timeout ? ((timeout.tv_sec * 1000) + (timeout.tv_usec / 1000)) : 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = timeout ? ((timeout.tv_sec * 1000) + (timeout.tv_usec / 1000)) : 0;
if (!SetCommTimeouts (((serial_port_windows *) sp)->hPort, &timeouts)) {
log_put (LOG_CATEGORY, NFC_PRIORITY_ERROR, "Unable to apply new timeout settings.");
return ECOMIO;
}
// TODO Enhance the reception method
// - According to MSDN, it could be better to implement nfc_abort_command() mecanism using Cancello()
// - ECOMTIMEOUT should be return is case of timeout (as of uart_posix implementation)
volatile bool * abort_flag_p = (volatile bool *)abort_p;
do {
res = ReadFile (((serial_port_windows *) sp)->hPort, pbtRx + dwTotalBytesReceived,
@ -168,7 +171,8 @@ uart_receive (serial_port sp, byte_t * pbtRx, const size_t szRx, void * abort_p)
dwTotalBytesReceived += dwBytesReceived;
if (!res) {
log_put (LOG_CATEGORY, NFC_PRIORITY_ERROR, "ReadFile error");
DWORD err = GetLastError();
log_put (LOG_CATEGORY, NFC_PRIORITY_ERROR, "ReadFile error: %u", err);
return ECOMIO;
}
if (((DWORD)szRx) > dwTotalBytesReceived) {
@ -184,9 +188,22 @@ uart_receive (serial_port sp, byte_t * pbtRx, const size_t szRx, void * abort_p)
}
int
uart_send (serial_port sp, const byte_t * pbtTx, const size_t szTx)
uart_send (serial_port sp, const byte_t * pbtTx, const size_t szTx, struct timeval *timeout)
{
DWORD dwTxLen = 0;
COMMTIMEOUTS timeouts;
timeouts.ReadIntervalTimeout = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = timeout ? ((timeout.tv_sec * 1000) + (timeout.tv_usec / 1000)) : 0;
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = timeout ? ((timeout.tv_sec * 1000) + (timeout.tv_usec / 1000)) : 0;
if (!SetCommTimeouts (((serial_port_windows *) sp)->hPort, &timeouts)) {
log_put (LOG_CATEGORY, NFC_PRIORITY_ERROR, "Unable to apply new timeout settings.");
return ECOMIO;
}
if (!WriteFile (((serial_port_windows *) sp)->hPort, pbtTx, szTx, &dwTxLen, NULL)) {
return ECOMIO;
}