dfu: remove transfer buffer out of USB section, since data will copy to/from use EP0 buffer.

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

Author: HiFiPhile

src/class/dfu/dfu_device.c

@@ -62,9 +62,7 @@ typedef struct {
 // Only a single dfu state is allowed
 static dfu_state_ctx_t _dfu_ctx;
 
-CFG_TUD_MEM_SECTION static struct {
-  TUD_EPBUF_DEF(transfer_buf, CFG_TUD_DFU_XFER_BUFSIZE);
-} _dfu_epbuf;
+CFG_TUD_MEM_ALIGN uint8_t _transfer_buf[CFG_TUD_DFU_XFER_BUFSIZE];
 
 static void reset_state(void) {
   _dfu_ctx.state = DFU_IDLE;
@@ -283,10 +281,10 @@ bool dfu_moded_control_xfer_cb(uint8_t rhport, uint8_t stage, const tusb_control
           TU_VERIFY(_dfu_ctx.attrs & DFU_ATTR_CAN_UPLOAD);
           TU_VERIFY(request->wLength <= CFG_TUD_DFU_XFER_BUFSIZE);
 
-          const uint16_t xfer_len = tud_dfu_upload_cb(_dfu_ctx.alt, request->wValue, _dfu_epbuf.transfer_buf,
+          const uint16_t xfer_len = tud_dfu_upload_cb(_dfu_ctx.alt, request->wValue, _transfer_buf,
                                                       request->wLength);
 
-          return tud_control_xfer(rhport, request, _dfu_epbuf.transfer_buf, xfer_len);
+          return tud_control_xfer(rhport, request, _transfer_buf, xfer_len);
         }
         break;
 
@@ -306,7 +304,7 @@ bool dfu_moded_control_xfer_cb(uint8_t rhport, uint8_t stage, const tusb_control
           if (request->wLength) {
             // Download with payload -> transition to DOWNLOAD SYNC
             _dfu_ctx.state = DFU_DNLOAD_SYNC;
-            return tud_control_xfer(rhport, request, _dfu_epbuf.transfer_buf, request->wLength);
+            return tud_control_xfer(rhport, request, _transfer_buf, request->wLength);
           } else {
             // Download is complete -> transition to MANIFEST SYNC
             _dfu_ctx.state = DFU_MANIFEST_SYNC;
@@ -378,7 +376,7 @@ static bool process_download_get_status(uint8_t rhport, uint8_t stage, const tus
   } else if (stage == CONTROL_STAGE_ACK) {
     if (_dfu_ctx.flashing_in_progress) {
       _dfu_ctx.state = DFU_DNBUSY;
-      tud_dfu_download_cb(_dfu_ctx.alt, _dfu_ctx.block, _dfu_epbuf.transfer_buf, _dfu_ctx.length);
+      tud_dfu_download_cb(_dfu_ctx.alt, _dfu_ctx.block, _transfer_buf, _dfu_ctx.length);
     } else {
       _dfu_ctx.state = DFU_DNLOAD_IDLE;
     }