static int ppp_modem_tx(ppp_device_t *self, const uint8_t *data, size_t len,
uint32_t flags) {
size_t done = 0;
(void)self;
(void)flags;
/* As long as we have something to send, do so. */
while(done < len) {
done += modem_write_data((unsigned char *)data + done, (int)len - done);
}
return 0;
}
int main()
{
int answerMode = 0;
unsigned char data[DATA_BUFFER_LENGTH];
int i;
int byteCount;
if (!modem_init())
{
printf("modem_init failed!\n");
return 1;
}
printf("\nDreamcast modem - example 1\n");
printf("Press START to exit\n\n");
if (answerMode)
printf("Answer mode - Call the Dreamcast. It will pick up after one ring.\n\n");
else
printf("Remote mode - Connect the phone line to your computer's modem and use ATA to\n \"answer\" the Dreamcast.\n\n");
printf("Once the modems are connected you can send data to the Dreamcast,\n");
printf("and the Dreamcast can send data to the remote modem by pressing the\n");
printf("A button.\n\n");
while (!buttonPressed(CONT_START))
{
modem_set_mode(answerMode ? MODEM_MODE_ANSWER :
MODEM_MODE_REMOTE,
MODEM_SPEED_V8_AUTO);
printf("Waiting for a connection..\n");
while (modem_is_connecting())
{
if (buttonPressed(CONT_START))
{
printf("Connection aborted\n");
return 0;
}
}
if (modem_is_connected())
{
printf("Connected at %dbps\n", (int)modem_get_connection_rate());
while (!buttonPressed(CONT_START) && modem_is_connected())
{
/* Receive data */
if (modem_has_data())
{
byteCount = modem_read_data(data, DATA_BUFFER_LENGTH);
for (i=0; i<byteCount; i++)
printf("%c", (data[i] >= 32 && data[i] <= 126) ?
data[i] : ' ');
}
/* Send data */
if (buttonPressed(CONT_A))
{
for (i=0; i<8; i++)
data[i] = (int)'a' + i;
modem_write_data(data, 8);
}
}
if (modem_is_connected())
{
printf("Disconnecting..\n");
modem_disconnect();
while (buttonPressed(CONT_START));
} else
printf("Disconnected\n");
} else
printf("Connection failed\n");
}
return 0;
}
