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Merge pull request #16 from zyp/master 

Fix for broken USB flow control.
This commit is contained in:
Gareth McMullin 2013-03-08 15:18:12 -08:00
parent 530ee15153 e8f9d52d2f
commit 7b10270007
1 changed files with 6 additions and 0 deletions
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6
src/platforms/stm32/gdb_if.c
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@ -54,8 +54,12 @@ void gdb_if_putchar(unsigned char c, int flush)
void gdb_usb_out_cb(usbd_device *dev, uint8_t ep) void gdb_usb_out_cb(usbd_device *dev, uint8_t ep)
{ {
(void)ep; (void)ep;
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 1);
count_new = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT, count_new = usbd_ep_read_packet(dev, CDCACM_GDB_ENDPOINT,
double_buffer_out, CDCACM_PACKET_SIZE); double_buffer_out, CDCACM_PACKET_SIZE);
if(!count_new) {
usbd_ep_nak_set(dev, CDCACM_GDB_ENDPOINT, 0);
}
} }
unsigned char gdb_if_getchar(void) unsigned char gdb_if_getchar(void)
@ -72,6 +76,7 @@ unsigned char gdb_if_getchar(void)
count_out = count_new; count_out = count_new;
count_new = 0; count_new = 0;
out_ptr = 0; out_ptr = 0;
usbd_ep_nak_set(usbdev, CDCACM_GDB_ENDPOINT, 0);
} }
} }
@ -93,6 +98,7 @@ unsigned char gdb_if_getchar_to(int timeout)
count_out = count_new; count_out = count_new;
count_new = 0; count_new = 0;
out_ptr = 0; out_ptr = 0;
usbd_ep_nak_set(usbdev, CDCACM_GDB_ENDPOINT, 0);
} }
} while(timeout_counter && !(out_ptr < count_out)); } while(timeout_counter && !(out_ptr < count_out));