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Allow DMX plugin to fail gracefully

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This commit is contained in:
Gavan Fantom
2007-04-29 12:17:37 +00:00
parent bafa106f11
commit 23a84186ff
1 changed files with 14 additions and 4 deletions
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18
src/lsi/dmx.c
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@@ -17,14 +17,15 @@ int dmxfd;
char dmxpacket[DMX_UNIVERSESIZE + DMX_PACKETSIZE]; char dmxpacket[DMX_UNIVERSESIZE + DMX_PACKETSIZE];
char *dmxuniverse; char *dmxuniverse;
void dmx_open(void) int dmx_open(void)
{ {
struct termios t; struct termios t;
int flags; int flags;
dmxfd = open(PORT, O_NONBLOCK | O_RDWR, 0); dmxfd = open(PORT, O_NONBLOCK | O_RDWR, 0);
if (dmxfd == -1) { if (dmxfd == -1) {
err(1, "failed to open DMX port"); warn("failed to open DMX port");
return 0;
} }
flags = fcntl(dmxfd, F_GETFL); flags = fcntl(dmxfd, F_GETFL);
@@ -34,6 +35,8 @@ void dmx_open(void)
cfmakeraw(&t); cfmakeraw(&t);
t.c_cflag = CLOCAL | CREAD | CS8; t.c_cflag = CLOCAL | CREAD | CS8;
tcsetattr(dmxfd, TCSANOW, &t); tcsetattr(dmxfd, TCSANOW, &t);
return 1;
} }
@@ -94,7 +97,10 @@ out:
int dmx_init(void) int dmx_init(void)
{ {
dmx_open(); int rv;
rv = dmx_open();
dmxpacket[0] = 0x7e; dmxpacket[0] = 0x7e;
dmxpacket[1] = 6; dmxpacket[1] = 6;
dmxpacket[2] = (DMX_UNIVERSESIZE+1) & 0xff; dmxpacket[2] = (DMX_UNIVERSESIZE+1) & 0xff;
@@ -104,7 +110,7 @@ int dmx_init(void)
dmxpacket[DMX_UNIVERSESIZE+5] = 0xe7; dmxpacket[DMX_UNIVERSESIZE+5] = 0xe7;
dmxuniverse = dmxpacket+5; dmxuniverse = dmxpacket+5;
// dmx_dumpparams(); // dmx_dumpparams();
return 1; return rv;
} }
void dmx_setchannel(int channel, int value) void dmx_setchannel(int channel, int value)
@@ -118,6 +124,10 @@ void dmx_output(void)
int off = 0; int off = 0;
// char *buf = dmxpacket; // char *buf = dmxpacket;
// printf("%x %x %x %x %x %x %x %x %x %x %x %x\n", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9], buf[10], buf[11]); // printf("%x %x %x %x %x %x %x %x %x %x %x %x\n", buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9], buf[10], buf[11]);
if (dmxfd == -1)
return;
while (off < DMX_PACKETSIZE) { while (off < DMX_PACKETSIZE) {
int r; int r;
r = write(dmxfd, dmxpacket + off, DMX_PACKETSIZE - off); r = write(dmxfd, dmxpacket + off, DMX_PACKETSIZE - off);