usbd: support set EP0 buffer size

Signed-off-by: HiFiPhile <[email protected]>

Author: HiFiPhile

src/device/usbd_control.c

@@ -60,7 +60,7 @@ typedef struct {
 static usbd_control_xfer_t _ctrl_xfer;
 
 CFG_TUD_MEM_SECTION static struct {
-  TUD_EPBUF_DEF(buf, CFG_TUD_ENDPOINT0_SIZE);
+  TUD_EPBUF_DEF(buf, CFG_TUD_EP0_BUFSIZE);
 } _ctrl_epbuf;
 
 //--------------------------------------------------------------------+
@@ -88,13 +88,13 @@ bool tud_control_status(uint8_t rhport, const tusb_control_request_t* request) {
 // Each transaction has up to Endpoint0's max packet size.
 // This function can also transfer an zero-length packet
 static bool data_stage_xact(uint8_t rhport) {
-  const uint16_t xact_len = tu_min16(_ctrl_xfer.data_len - _ctrl_xfer.total_xferred, CFG_TUD_ENDPOINT0_SIZE);
+  const uint16_t xact_len = tu_min16(_ctrl_xfer.data_len - _ctrl_xfer.total_xferred, CFG_TUD_EP0_BUFSIZE);
   uint8_t ep_addr = EDPT_CTRL_OUT;
 
   if (_ctrl_xfer.request.bmRequestType_bit.direction == TUSB_DIR_IN) {
     ep_addr = EDPT_CTRL_IN;
     if (xact_len) {
-      TU_VERIFY(0 == tu_memcpy_s(_ctrl_epbuf.buf, CFG_TUD_ENDPOINT0_SIZE, _ctrl_xfer.buffer, xact_len));
+      TU_VERIFY(0 == tu_memcpy_s(_ctrl_epbuf.buf, CFG_TUD_EP0_BUFSIZE, _ctrl_xfer.buffer, xact_len));
     }
   }
 
@@ -179,7 +179,7 @@ bool usbd_control_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result,
   // Data Stage is complete when all request's length are transferred or
   // a short packet is sent including zero-length packet.
   if ((_ctrl_xfer.request.wLength == _ctrl_xfer.total_xferred) ||
-      (xferred_bytes < CFG_TUD_ENDPOINT0_SIZE)) {
+      (xferred_bytes < CFG_TUD_EP0_BUFSIZE)) {
     // DATA stage is complete
     bool is_ok = true;
 

src/tusb_option.h

@@ -482,6 +482,10 @@
   #define CFG_TUD_ENDPOINT0_SIZE  64
 #endif
 
+#ifndef CFG_TUD_EP0_BUFSIZE
+  #define CFG_TUD_EP0_BUFSIZE  CFG_TUD_ENDPOINT0_SIZE
+#endif
+
 #ifndef CFG_TUD_INTERFACE_MAX
   #define CFG_TUD_INTERFACE_MAX   16
 #endif