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Don't send anything on USB if not configured or DTR is released.

This commit is contained in:
Gareth McMullin 2011-11-12 13:46:16 +13:00
parent 33e1352c34
commit 7b13bae8dc
1 changed files with 6 additions and 0 deletions
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6
src/stm32/gdb_if.c
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@ -39,6 +39,12 @@ void gdb_if_putchar(unsigned char c, int flush)
{
buffer_in[count_in++] = c;
if(flush || (count_in == VIRTUAL_COM_PORT_DATA_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(1, buffer_in, count_in) <= 0);
count_in = 0;
}