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serial: Introduce API osmo_serial_speed_t 

This allows usual integer parsing at app level and calling this function
to make sure correct values will be passed to
osmo_serial_set_baudrate().

Change-Id: I41415c99d26128b33a8bf5ef7b38948bd1fe5d50
This commit is contained in:
Pau Espin 2020-11-13 22:58:14 +01:00
parent 28acb21321
commit 4fe8a7598a
2 changed files with 36 additions and 0 deletions
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1
include/osmocom/core/serial.h
View File

@ -32,5 +32,6 @@ int osmo_serial_init(const char *dev, speed_t baudrate);
int osmo_serial_set_baudrate(int fd, speed_t baudrate);
int osmo_serial_set_custom_baudrate(int fd, int baudrate);
int osmo_serial_clear_custom_baudrate(int fd);
int osmo_serial_speed_t(unsigned int baudrate, speed_t *speed);
/*! @} */

35
src/serial.c
View File

@ -245,4 +245,39 @@ osmo_serial_clear_custom_baudrate(int fd)
return 0;
}
/*! Convert unsigned integer value to speed_t
* \param[in] baudrate integer value containing the desired standard baudrate
* \param[out] speed the standrd baudrate requested in speed_t format
* \returns 0 for success or negative errno.
*/
int
osmo_serial_speed_t(unsigned int baudrate, speed_t *speed)
{
switch(baudrate) {
case 0: *speed = B0; break;
case 50: *speed = B50; break;
case 75: *speed = B75; break;
case 110: *speed = B110; break;
case 134: *speed = B134; break;
case 150: *speed = B150; break;
case 200: *speed = B200; break;
case 300: *speed = B300; break;
case 600: *speed = B600; break;
case 1200: *speed = B1200; break;
case 1800: *speed = B1800; break;
case 2400: *speed = B2400; break;
case 4800: *speed = B4800; break;
case 9600: *speed = B9600; break;
case 19200: *speed = B19200; break;
case 38400: *speed = B38400; break;
case 57600: *speed = B57600; break;
case 115200: *speed = B115200; break;
case 230400: *speed = B230400; break;
default:
*speed = B0;
return -EINVAL;
}
return 0;
}
/*! @} */