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Modem: Implement AT&C (DCD signal control)

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This commit is contained in:
Alexander Babikov
2024-04-01 11:42:55 +05:00
parent 94c917eaaf
commit e641365866
1 changed files with 13 additions and 1 deletions
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14
src/network/net_modem.c
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@@ -110,6 +110,7 @@ typedef struct modem_t
uint32_t port; uint32_t port;
int plusinc, flowcontrol; int plusinc, flowcontrol;
int in_warmup, dtrmode; int in_warmup, dtrmode;
int dcdmode;
bool connected, ringing; bool connected, ringing;
bool echo, numericresponse; bool echo, numericresponse;
@@ -571,7 +572,7 @@ modem_enter_idle_state(modem_t* modem)
serial_set_cts(modem->serial, 1); serial_set_cts(modem->serial, 1);
serial_set_dsr(modem->serial, 1); serial_set_dsr(modem->serial, 1);
serial_set_dcd(modem->serial, 0); serial_set_dcd(modem->serial, (!modem->dcdmode ? 1 : 0));
serial_set_ri(modem->serial, 0); serial_set_ri(modem->serial, 0);
} }
@@ -595,6 +596,7 @@ modem_enter_connected_state(modem_t* modem)
void void
modem_reset(modem_t* modem) modem_reset(modem_t* modem)
{ {
modem->dcdmode = 1;
modem_enter_idle_state(modem); modem_enter_idle_state(modem);
modem->cmdpos = 0; modem->cmdpos = 0;
modem->cmdbuf[0] = 0; modem->cmdbuf[0] = 0;
@@ -930,6 +932,16 @@ modem_do_command(modem_t* modem)
case '&': { // & escaped commands case '&': { // & escaped commands
char cmdchar = modem_fetch_character(&scanbuf); char cmdchar = modem_fetch_character(&scanbuf);
switch(cmdchar) { switch(cmdchar) {
case 'C': {
const uint32_t val = modem_scan_number(&scanbuf);
if (val < 2)
modem->dcdmode = val;
else {
modem_send_res(modem, ResERROR);
return;
}
break;
}
case 'K': { case 'K': {
const uint32_t val = modem_scan_number(&scanbuf); const uint32_t val = modem_scan_number(&scanbuf);
if (val < 5) if (val < 5)