int
Volkslogger::SendCommandReadBulk(Port &port, unsigned baud_rate,
OperationEnvironment &env,
Command cmd, uint8_t param1,
void *buffer, size_t max_length,
const unsigned timeout_firstchar_ms)
{
unsigned old_baud_rate = port.GetBaudrate();
if (old_baud_rate != 0) {
if (!SendCommandSwitchBaudRate(port, env, cmd, param1, baud_rate))
return -1;
/* after switching baud rates, this sleep time is necessary; it has
been verified experimentally */
env.Sleep(300);
} else {
/* port does not support baud rate switching, use plain
SendCommand() without new baud rate */
if (!SendCommand(port, env, cmd, param1))
return -1;
}
int nbytes = ReadBulk(port, env, buffer, max_length, timeout_firstchar_ms);
if (old_baud_rate != 0)
port.SetBaudrate(old_baud_rate);
return nbytes;
}
static inline bool SendCommandSwitchBaudRate(Port &port,
OperationEnvironment &env,
Command cmd,
unsigned baud_rate) {
return SendCommandSwitchBaudRate(port, env, cmd, 0, baud_rate);
}