get rid of OUT queue, caused missed frames

Inc/gex_gateway.h

@@ -7,5 +7,6 @@
 
 #include "main.h"
 void gw_process(void);
+void gw_handle_usb_out(uint8_t *buffer);
 
 #endif //GEX_NRF_GEX_GATEWAY_H

Src/gex_gateway.c

@@ -42,11 +42,8 @@ void start_slave_cmd(uint8_t slave_addr, uint16_t frame_len, uint8_t cksum)
     msg4slave_cksum = cksum;
 }
 
-/** called from the main loop, periodically */
+void gw_handle_usb_out(uint8_t *buffer)
-void gw_process(void)
 {
-    static uint8_t buffer[MQ_SLOT_LEN];
-    while (mq_read(&usb_rxq, buffer)) { // greedy - handle as many as possible
     dbg("Handling frame.");
     if (urx_state == URXS_IDLE) {
         PayloadParser pp = pp_start(buffer, MQ_SLOT_LEN, NULL);
@@ -110,6 +107,14 @@ void gw_process(void)
             urx_state = URXS_IDLE;
         }
     }
-    }
+}
+
+/** called from the main loop, periodically */
+void gw_process(void)
+{
+//    static uint8_t buffer[MQ_SLOT_LEN];
+//    while (mq_read(&usb_rxq, buffer)) { // greedy - handle as many as possible
+//        gw_handle_usb_out(buffer);
+//    }
 }
 

Src/usbd_cdc_if.c

@@ -50,6 +50,7 @@
 /* Includes ------------------------------------------------------------------*/
 #include <debug.h>
 #include <msg_queue.h>
+#include <gex_gateway.h>
 #include "usbd_cdc_if.h"
 
 /* USER CODE BEGIN INCLUDE */
@@ -298,10 +299,15 @@ static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
 
   // queue the frame
   dbg("USB rx frame");
-  bool suc = mq_post(&usb_rxq, Buf, *Len);
+  gw_handle_usb_out(Buf); // this expects full 64byte frames always starting with magic or useful data
-  if (!suc) {
+
-    dbg("USB rxq overrun!");
+  // handled immediately in the interrupt to block USB (NAK)
-  }
+
+//
+//  bool suc = mq_post(&usb_rxq, Buf, *Len);
+//  if (!suc) {
+//    dbg("USB rxq overrun!");
+//  }
 
   return (USBD_OK);
   /* USER CODE END 6 */
@@ -336,6 +342,8 @@ uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)
 
 /* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
 
+// TODO add Tx Done notify
+
 /**
   * @}
   */