| From 238bbe98558bcd5ed9ab73ef03db82b57ab056ab Mon Sep 17 00:00:00 2001 |
| From: Giulio Benetti <giulio.benetti@micronovasrl.com> |
| Date: Fri, 31 Aug 2018 15:18:22 +0200 |
| Subject: [PATCH] sysdep1: check if RS485 is support before setting its |
| parameters |
| |
| Not every kernel supports RS485, so better check it before setting its |
| parameters. |
| |
| Test if RS485 is supported by checking if these 3 macros are defined: |
| - SER_RS485_ENABLED |
| - TIOCGRS485 |
| - TIOCSRS485 |
| If they're not defined m_set485parms becomes a dummy function. |
| |
| Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> |
| --- |
| src/sysdep1.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| diff --git a/src/sysdep1.c b/src/sysdep1.c |
| index 798b006..b03b442 100644 |
| --- a/src/sysdep1.c |
| +++ b/src/sysdep1.c |
| @@ -599,7 +599,7 @@ void m_set485parms(int fd, int en, int rts_on_snd, int rts_aft_snd, |
| int rx_dur_tx, int term_bus, char *del_rts_bef_snd, |
| char *del_rts_aft_snd) |
| { |
| -#ifdef SER_RS485_ENABLED |
| +#if defined (SER_RS485_ENABLED) && defined (TIOCGRS485) && defined (TIOCSRS485) |
| struct serial_rs485 rs485conf; |
| |
| if (ioctl(fd, TIOCGRS485, &rs485conf)) |
| -- |
| 2.17.1 |
| |
