/**
* Read a number of bytes from the specified serial port, block until finished.
*
* @param serial Previously initialized serial port structure.
* @param buf Buffer where to store the bytes that are read.
* @param[in] count The number of bytes to read.
* @param[in] timeout_ms Timeout in ms, or 0 for no timeout.
*
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR Other error.
* @retval other The number of bytes read. If this is less than the number
* requested, the timeout was reached.
*
* @private
*/
SR_PRIV int serial_read_blocking(struct sr_serial_dev_inst *serial, void *buf,
size_t count, unsigned int timeout_ms)
{
return _serial_read(serial, buf, count, 0, timeout_ms);
}
/**
* Try to read up to @a count bytes from the specified serial port, return
* immediately with what's available.
*
* @param serial Previously initialized serial port structure.
* @param buf Buffer where to store the bytes that are read.
* @param[in] count The number of bytes to read.
*
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR Other error.
* @retval other The number of bytes read.
*
* @private
*/
SR_PRIV int serial_read_nonblocking(struct sr_serial_dev_inst *serial, void *buf,
size_t count)
{
return _serial_read(serial, buf, count, 1, 0);
}
int serial_read_nonblocking(struct serial_device_t *serial,
void *buf,
size_t count)
{
return _serial_read(serial, buf, count, 1, 0);
}