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Drain the serial queue of invalid data.

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This commit is contained in:
Jonathan Naylor
2016-03-16 08:08:28 +00:00
parent 702ea80edf
commit 40def7dd70
1 changed files with 13 additions and 11 deletions
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8
Modem.cpp
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@@ -867,6 +867,7 @@ RESP_TYPE_MMDVM CModem::getResponse(unsigned char *buffer, unsigned int& length)
assert(buffer != NULL); assert(buffer != NULL);
// Get the start of the frame or nothing at all // Get the start of the frame or nothing at all
for (;;) {
int ret = m_serial.read(buffer + 0U, 1U); int ret = m_serial.read(buffer + 0U, 1U);
if (ret < 0) { if (ret < 0) {
LogError("Error when reading from the modem"); LogError("Error when reading from the modem");
@@ -876,10 +877,11 @@ RESP_TYPE_MMDVM CModem::getResponse(unsigned char *buffer, unsigned int& length)
if (ret == 0) if (ret == 0)
return RTM_TIMEOUT; return RTM_TIMEOUT;
if (buffer[0U] != MMDVM_FRAME_START) if (buffer[0U] == MMDVM_FRAME_START)
return RTM_TIMEOUT; break;
}
ret = m_serial.read(buffer + 1U, 1U); int ret = m_serial.read(buffer + 1U, 1U);
if (ret < 0) { if (ret < 0) {
LogError("Error when reading from the modem"); LogError("Error when reading from the modem");
return RTM_ERROR; return RTM_ERROR;