void gdb_if_putchar(unsigned char c, int flush)
{
buffer_in[count_in++] = c;
if(flush || (count_in == CDCACM_PACKET_SIZE)) {
/* Refuse to send if USB isn't configured, and
* don't bother if nobody's listening */
if((cdcacm_get_config() != 1) || !cdcacm_get_dtr()) {
count_in = 0;
return;
}
while(usbd_ep_write_packet(usbdev, CDCACM_GDB_ENDPOINT,
buffer_in, count_in) <= 0);
if (flush && (count_in == CDCACM_PACKET_SIZE)) {
/* We need to send an empty packet for some hosts
* to accept this as a complete transfer. */
/* libopencm3 needs a change for us to confirm when
* that transfer is complete, so we just send a packet
* containing a null byte for now.
*/
while (usbd_ep_write_packet(usbdev, CDCACM_GDB_ENDPOINT,
"\0", 1) <= 0);
}
count_in = 0;
}
}
unsigned char gdb_if_getchar(void)
{
while (!(out_ptr < count_out)) {
/* Detach if port closed */
if (!cdcacm_get_dtr())
return 0x04;
gdb_if_update_buf();
}
return buffer_out[out_ptr++];
}
unsigned char gdb_if_getchar(void)
{
while(tail_out == head_out) {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
}
return buffer_out[tail_out++ % sizeof(buffer_out)];
}
void gdb_if_putchar(unsigned char c, int flush)
{
buffer_in[count_in++] = c;
if(flush || (count_in == CDCACM_PACKET_SIZE)) {
/* Refuse to send if USB isn't configured, and
* don't bother if nobody's listening */
if((cdcacm_get_config() != 1) || !cdcacm_get_dtr()) {
count_in = 0;
return;
}
while(usbd_ep_write_packet(usbdev, CDCACM_GDB_ENDPOINT,
buffer_in, count_in) <= 0);
count_in = 0;
}
}
unsigned char gdb_if_getchar(void)
{
while(!(out_ptr < count_out)) {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
count_out = usbd_ep_read_packet(usbdev, CDCACM_GDB_ENDPOINT,
buffer_out, CDCACM_PACKET_SIZE);
out_ptr = 0;
}
return buffer_out[out_ptr++];
}
unsigned char gdb_if_getchar_to(int timeout)
{
platform_timeout_set(timeout);
if (!(out_ptr < count_out)) do {
/* Detach if port closed */
if (!cdcacm_get_dtr())
return 0x04;
gdb_if_update_buf();
} while (!platform_timeout_is_expired() && !(out_ptr < count_out));
if(out_ptr < count_out)
return gdb_if_getchar();
return -1;
}
unsigned char gdb_if_getchar_to(int timeout)
{
platform_timeout t;
platform_timeout_set(&t, timeout);
if(head_out == tail_out) do {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
} while(!platform_timeout_is_expired(&t) && head_out == tail_out);
if(head_out != tail_out)
return gdb_if_getchar();
return -1;
}
unsigned char gdb_if_getchar_to(int timeout)
{
timeout_counter = timeout/100;
if(!(out_ptr < count_out)) do {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
count_out = usbd_ep_read_packet(usbdev, CDCACM_GDB_ENDPOINT,
buffer_out, CDCACM_PACKET_SIZE);
out_ptr = 0;
} while(timeout_counter && !(out_ptr < count_out));
if(out_ptr < count_out)
return gdb_if_getchar();
return -1;
}
unsigned char gdb_if_getchar(void)
{
while(!(out_ptr < count_out)) {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
if (count_new) {
memcpy(buffer_out, double_buffer_out,count_new);
count_out = count_new;
count_new = 0;
out_ptr = 0;
usbd_ep_nak_set(usbdev, CDCACM_GDB_ENDPOINT, 0);
}
}
return buffer_out[out_ptr++];
}
unsigned char gdb_if_getchar_to(int timeout)
{
timeout_counter = timeout/100;
if(!(out_ptr < count_out)) do {
/* Detach if port closed */
if(!cdcacm_get_dtr())
return 0x04;
while(cdcacm_get_config() != 1);
if (count_new) {
memcpy(buffer_out, double_buffer_out,count_new);
count_out = count_new;
count_new = 0;
out_ptr = 0;
usbd_ep_nak_set(usbdev, CDCACM_GDB_ENDPOINT, 0);
}
} while(timeout_counter && !(out_ptr < count_out));
if(out_ptr < count_out)
return gdb_if_getchar();
return -1;
}