aboutsummaryrefslogtreecommitdiffstats
path: root/libmaple
diff options
context:
space:
mode:
Diffstat (limited to 'libmaple')
-rw-r--r--libmaple/usb/usb.c27
1 files changed, 9 insertions, 18 deletions
diff --git a/libmaple/usb/usb.c b/libmaple/usb/usb.c
index 0474cad..0549f3c 100644
--- a/libmaple/usb/usb.c
+++ b/libmaple/usb/usb.c
@@ -380,28 +380,19 @@ void usbWaitReset(void) {
*/
int16 usbSendBytes(uint8* sendBuf, uint16 len) {
- if (reset_state == NDTR_NRTS) {
+ if (reset_state != START || bDeviceState != CONFIGURED) {
return -1; /* indicates to caller to stop trying, were not connected */
}
- /* Block for any pending writes */
- while (countTx)
- ;
-/* while (countTx != 0) { */
-/* if (reset_state == NDTR_NRTS) { */
-/* return 0; */
-/* } */
-/* }/\* wait for pipe to be clear *\/ */
-
-
- /* ideally we should wait here, but it gets stuck
- for some reason. countTx wont decrement when
- theres no host side port reading the data, this is
- known, but even if we add the check for NDTR_NRTS it
- still gets stuck...*/
- if (countTx != 0) {
- return 0; /* indicated to caller to keep trying, were just busy */
+ /* This may be the correct behavior but it's undocumented
+ if (countTx >= VCOM_TX_EPSIZE) {
+ return 0; // indicates to caller that the buffer is full
}
+ */
+
+ /* Block for any pending writes */
+ while (countTx)
+ ;
uint16 sent = len;