USB: provide low-level internal TX and RX buffers

Some USB controllers may require specific constraints on the buffers
used for the endpoint transfers (e.g., a proper memory alignment).

Add CONFIG_USB_RXBUFSIZE and CONFIG_USB_TXBUFSIZE to the usb module
configuration parameters to define the size of these buffers.

If a low-level driver has specific memory alignment constraints it can
define such buffers internally using the proper alignment.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@4342 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cfg/cfg_usb.h b/bertos/cfg/cfg_usb.h
index 9875fc098e1004203456eaea7c1c272606d0adb7..940d76183b8205b79ca219cb3b8340b837ffbbdd 100644 (file)
--- a/bertos/cfg/cfg_usb.h
+++ b/bertos/cfg/cfg_usb.h
@@ -54,4 +54,18 @@
  */
 #define USB_LOG_FORMAT     LOG_FMT_TERSE
 
+/**
+ * Size of the USB outbound buffer [bytes].
+ * $WIZ$ type = "int"
+ * $WIZ$ min = 2
+ */
+#define CONFIG_USB_TXBUFSIZE  64
+
+/**
+ * Size of the USB inbound buffer [bytes].
+ * $WIZ$ type = "int"
+ * $WIZ$ min = 2
+ */
+#define CONFIG_USB_RXBUFSIZE  64
+
 #endif /* CFG_USB_H */