sw: don't clear OUT buffer during usb_recv

If there is data already in the OUT buffer, don't throw it away. This was necessary when using `epfifo` due to the way it shared OUT and SETUP packets. However, it is causing reliability issues with eptri. Signed-off-by: Sean Cross <[email protected]>
im-tomu · Nov 29, 2019 · c8872c1 · c8872c1
1 parent bd41cbc
commit c8872c1
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diff --git a/releases/v2.0.1/hacker-top.dfu b/releases/v2.0.1/hacker-top.dfu
diff --git a/releases/v2.0.1/pvt-top.dfu b/releases/v2.0.1/pvt-top.dfu
diff --git a/sw/src/usb-eptri.c b/sw/src/usb-eptri.c
@@ -303,9 +303,6 @@ void usb_err(uint8_t ep) {
 
 int usb_recv(void *buffer, int buffer_len) {
     // Set the OUT response to ACK, since we are in a position to receive data now.
-    if (out_have) {
-        usb_ack(0);
-    }
     while (1) {
         if (out_have) {
             if (buffer_len > out_buffer_length)