- usbPrepareTransmit(&USB_DRIVER, NKRO_ENDPOINT, (uint8_t *)report, sizeof(report_keyboard_t));
- do {
- osalSysLock();
- ret = usbStartTransmitI(&USB_DRIVER, NKRO_ENDPOINT);
- osalSysUnlock();
- } while (ret);
+ /* need to wait until the previous packet has made it through */
+ /* can rewrite this using the synchronous API, then would wait
+ * until *after* the packet has been transmitted. I think
+ * this is more efficient */
+ /* busy wait, should be short and not very common */
+ osalSysLock();
+ if(usbGetTransmitStatusI(&USB_DRIVER, NKRO_ENDPOINT)) {
+ /* Need to either suspend, or loop and call unlock/lock during
+ * every iteration - otherwise the system will remain locked,
+ * no interrupts served, so USB not going through as well.
+ * Note: for suspend, need USB_USE_WAIT == TRUE in halconf.h */
+ osalThreadSuspendS(&(&USB_DRIVER)->epc[NKRO_ENDPOINT]->in_state->thread);
+ }
+ usbStartTransmitI(&USB_DRIVER, NKRO_ENDPOINT, (uint8_t *)report, sizeof(report_keyboard_t));
+ osalSysUnlock();