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Added comment to lib/isdn.c. Fixed call-answering in v21_softmodem. 

v21_softmodem still does not seem to answer right.
This commit is contained in:
Andreas Beck 1998-12-08 21:27:43 +00:00
parent 3486a20d23
commit 1dea4b957b
2 changed files with 48 additions and 9 deletions
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4
lib/isdn.c
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@ -28,7 +28,11 @@ int IsdnOpenDevice(char *device)
int isdnfd;
struct termios isdnsetting;
#if 1
if ( (isdnfd=open(device,O_RDWR)) < 0 ) {
#else // Fritz Elfert does here:
if ( (isdnfd=open(device,O_RDWR|O_NDELAY)) < 0 ) {
#endif
sprintf(isdnerr,"Unable to open '%s'",device);
return -1;
}

53
v21_softmodem.c
View File

@ -94,7 +94,7 @@ static void test_v21(enum MODEM_MODE direction)
/* helper for data in-/output
*/
char data;
unsigned char data;
/* helper to avoid overflowing the send buffer.
*/
@ -163,6 +163,24 @@ static void test_v21(enum MODEM_MODE direction)
}
fskd->sendto=deserial;
/* The first 2 seconds are silence to allow for finding the
* noise level.
* No output is made until the "wait" variable is down to zero.
*/
wait=4*SAMPLES_PER_SECOND; /* 2s steady carrier ! */
while(wait--)
{
/* Read data from isdn4linux.
*/
IsdnReadAudio(isdnhandle,&data,1);
/* Send back a steady 0
*/
data=int2alaw(0);
IsdnSendAudio(isdnhandle,&data,1);
}
/* The first two seconds are reserved to send a steady carrier.
* No output is made until the "wait" variable is down to zero.
*/
@ -218,6 +236,11 @@ void setup_isdn(char *sourcemsn)
{
char cmdbuffer[128];
/* Reset the modem
*/
sprintf(cmdbuffer,"ATZ");
IsdnCommand(isdnhandle,cmdbuffer,1,1);
/* Set up the MSN.
*/
sprintf(cmdbuffer,"AT&E%s",sourcemsn);
@ -227,13 +250,21 @@ void setup_isdn(char *sourcemsn)
*/
IsdnCommand(isdnhandle,"AT+FCLASS=8",1,1);
/* Set the data format to aLaw.
*/
IsdnCommand(isdnhandle,"AT+VSM=5",1,1);
/* Set the service identifier to "audio".
*/
IsdnCommand(isdnhandle,"ATS18=1",1,1); /* service == audio */
/* Set layer 2 to "audio".
*/
IsdnCommand(isdnhandle,"ATS14=4",1,1); /* layer 2 == audio */
/* Set the data format to aLaw, and the device to "phone-line".
*/
IsdnCommand(isdnhandle,"AT+VSM=5+VLS=2",1,1);
// IsdnCommand(isdnhandle,"AT+VSM=5+VLS=2",1,1);
}
/* A function that more or less implements the "ATDxxx" function of a modem.
@ -249,7 +280,7 @@ void dial_isdn(char *number)
/* Set up the packet size.
*/
IsdnCommand(isdnhandle,"ATS16=48",1,1); /* Sendpacketsize/16 WHY ??? */
// IsdnCommand(isdnhandle,"ATS16=48",1,1); /* Sendpacketsize/16 WHY ??? */
/* Start full duplex audio transmission.
*/
@ -260,17 +291,21 @@ void dial_isdn(char *number)
*/
void answer_isdn(void)
{
/* Set up the packet size.
*/
IsdnCommand(isdnhandle,"ATS16=48",1,1); /* Sendpacketsize/16 WHY ??? */
// /* Set up the packet size.
// */
// IsdnCommand(isdnhandle,"ATS16=48",1,1); /* Sendpacketsize/16 WHY ??? */
/* Answer the pending call - hope there is one ...
*/
IsdnCommand(isdnhandle,"ATA",1,1);
// /* Start full duplex audio transmission.
// /* Set the data format to aLaw, and the device to "phone-line".
// */
// IsdnCommand(isdnhandle,"AT+VTX+VRX",1,0);
// IsdnCommand(isdnhandle,"AT+VSM=5+VLS=2",1,1);
/* Start full duplex audio transmission.
*/
IsdnCommand(isdnhandle,"AT+VTX+VRX",1,0);
}
/* Print out how to use this program.
@ -353,7 +388,7 @@ void main(int argc,char **argv)
{
char buffer[256];
IsdnReadLine(isdnhandle,buffer,sizeof(buffer));
printf("Readline:%s",buffer);
printf("Readline:%s\n",buffer);
if (strncmp(buffer,"RING",4)==0) break;
}
answer_isdn();