void gdb_usb_out_cb(usbd_device *dev, uint8_t ep)
{
(void)ep;
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 1);
count_new = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT,
double_buffer_out, CDCACM_PACKET_SIZE);
if(!count_new) {
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 0);
}
}
void gdb_usb_out_cb(usbd_device *dev, uint8_t ep)
{
(void)ep;
static uint8_t buf[CDCACM_PACKET_SIZE];
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 1);
uint32_t count = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT,
(uint8_t *)buf, CDCACM_PACKET_SIZE);
uint32_t idx;
for (idx=0; idx<count; idx++) {
buffer_out[head_out++ % sizeof(buffer_out)] = buf[idx];
}
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 0);
}
static void gdb_if_update_buf(void)
{
while (cdcacm_get_config() != 1);
#ifdef STM32F4
asm volatile ("cpsid i; isb");
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);
}
asm volatile ("cpsie i; isb");
#else
count_out = usbd_ep_read_packet(usbdev, CDCACM_GDB_ENDPOINT,
buffer_out, CDCACM_PACKET_SIZE);
out_ptr = 0;
#endif
}
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;
}
