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Merge pull request #4247 from Cacodemon345/modem_emu

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Modem emulation (includinng SLIP connectivity)
This commit is contained in:
Miran Grča
2024-03-12 11:45:03 +01:00
committed by GitHub
parent 18c04a3ef0 babadfb5c2
commit 4646fa5d12
12 changed files with 1400 additions and 6 deletions
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40
src/device/serial.c
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@@ -432,6 +432,25 @@ serial_set_dcd(serial_t *dev, uint8_t enabled)
}
}
void
serial_set_ri(serial_t *dev, uint8_t enabled)
{
uint8_t prev_state = !!(dev->msr & 0x40);
if (dev->mctrl & 0x10)
return;
dev->msr &= ~0x40;
dev->msr |= (!!enabled) << 6;
dev->msr_set &= ~0x40;
dev->msr_set |= (!!enabled) << 6;
if (prev_state == 0 && (!!enabled) == 1) {
dev->msr |= 0x4;
dev->int_status |= SERIAL_INT_MSR;
serial_update_ints(dev);
}
}
void
serial_set_clock_src(serial_t *dev, double clock_src)
{
@@ -570,6 +589,8 @@ serial_write(uint16_t addr, uint8_t val, void *priv)
serial_do_irq(dev, 0);
if ((val ^ dev->mctrl) & 0x10)
serial_reset_fifo(dev);
if (dev->sd && dev->sd->dtr_callback && (val ^ dev->mctrl) & 1)
dev->sd->dtr_callback(dev, val & 1, dev->sd->priv);
dev->mctrl = val;
if (val & 0x10) {
new_msr = (val & 0x0c) << 4;
@@ -797,6 +818,25 @@ serial_attach_ex(int port,
return sd->serial;
}
serial_t *
serial_attach_ex_2(int port,
void (*rcr_callback)(struct serial_s *serial, void *priv),
void (*dev_write)(struct serial_s *serial, void *priv, uint8_t data),
void (*dtr_callback)(struct serial_s *serial, int status, void *priv),
void *priv)
{
serial_device_t *sd = &serial_devices[port];
sd->rcr_callback = rcr_callback;
sd->dtr_callback = dtr_callback;
sd->dev_write = dev_write;
sd->transmit_period_callback = NULL;
sd->lcr_callback = NULL;
sd->priv = priv;
return sd->serial;
}
static void
serial_speed_changed(void *priv)
{