stmhal/usb: Use real packet size (not maximum) in HID receive.

prusnak · dpgeorge · commit 99d62c4def5f · 2016-10-04T15:39:31.000+11:00
diff --git a/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c b/stmhal/usbdev/class/src/usbd_cdc_msc_hid.c
@@ -1069,7 +1069,10 @@ uint8_t USBD_HID_ReceivePacket(USBD_HandleTypeDef *pdev) {
     }
 
     // Prepare Out endpoint to receive next packet
-    USBD_LL_PrepareReceive(pdev, hid_out_ep, HID_ClassData.RxBuffer, HID_DATA_FS_MAX_PACKET_SIZE);
+    uint16_t mps_out =
+        hid_desc[HID_DESC_OFFSET_MAX_PACKET_OUT_LO]
+        | (hid_desc[HID_DESC_OFFSET_MAX_PACKET_OUT_HI] << 8);
+    USBD_LL_PrepareReceive(pdev, hid_out_ep, HID_ClassData.RxBuffer, mps_out);
 
     return USBD_OK;
 }

Original file line number	Diff line number	Diff line change
`@@ -1069,7 +1069,10 @@ uint8_t USBD_HID_ReceivePacket(USBD_HandleTypeDef *pdev) {`
`1069`	`1069`	`}`
`1070`	`1070`
`1071`	`1071`	`// Prepare Out endpoint to receive next packet`
`1072`		`- USBD_LL_PrepareReceive(pdev, hid_out_ep, HID_ClassData.RxBuffer, HID_DATA_FS_MAX_PACKET_SIZE);`
	`1072`	`+ uint16_t mps_out =`
	`1073`	`+ hid_desc[HID_DESC_OFFSET_MAX_PACKET_OUT_LO]`
	`1074`	`+ \| (hid_desc[HID_DESC_OFFSET_MAX_PACKET_OUT_HI] << 8);`
	`1075`	`+ USBD_LL_PrepareReceive(pdev, hid_out_ep, HID_ClassData.RxBuffer, mps_out);`
`1073`	`1076`
`1074`	`1077`	`return USBD_OK;`
`1075`	`1078`	`}`