Rename PDIProtocol.c/.h to XPROGProtocol.c/.h as it will now handle both TPI and...

[pub/USBasp.git] / LUFA / Drivers / USB / LowLevel / Endpoint.c

diff --git a/LUFA/Drivers/USB/LowLevel/Endpoint.c b/LUFA/Drivers/USB/LowLevel/Endpoint.c
index 6d59510..2244996 100644 (file)
--- a/LUFA/Drivers/USB/LowLevel/Endpoint.c
+++ b/LUFA/Drivers/USB/LowLevel/Endpoint.c
@@ -207,6 +207,9 @@ uint8_t Endpoint_Discard_Stream(uint16_t Length
        return ENDPOINT_RWSTREAM_NoError;\r
 }\r
 \r
+/* The following abuses the C preprocessor in order to copy-past common code with slight alterations,\r
+ * so that the code needs to be written once. It is a crude form of templating to reduce code maintenance. */\r
+\r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_Stream_LE\r
 #define  TEMPLATE_BUFFER_TYPE                      const void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearIN()\r
@@ -231,21 +234,21 @@ uint8_t Endpoint_Discard_Stream(uint16_t Length
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_Stream_BE\r
 #define  TEMPLATE_BUFFER_TYPE                      const void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearIN()\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(*((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_RW.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_EStream_BE\r
 #define  TEMPLATE_BUFFER_TYPE                      const void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearIN()\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(eeprom_read_byte((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_RW.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_PStream_BE\r
 #define  TEMPLATE_BUFFER_TYPE                      const void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearIN()\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(pgm_read_byte((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_RW.c"\r
 \r
@@ -266,14 +269,14 @@ uint8_t Endpoint_Discard_Stream(uint16_t Length
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Read_Stream_BE\r
 #define  TEMPLATE_BUFFER_TYPE                      void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearOUT()\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         *((uint8_t*)BufferPtr--) = Endpoint_Read_Byte()\r
 #include "Template/Template_Endpoint_RW.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Read_EStream_BE\r
 #define  TEMPLATE_BUFFER_TYPE                      void*\r
 #define  TEMPLATE_CLEAR_ENDPOINT()                 Endpoint_ClearOUT()\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         eeprom_write_byte((uint8_t*)BufferPtr--, Endpoint_Read_Byte())\r
 #include "Template/Template_Endpoint_RW.c"\r
 \r
@@ -295,17 +298,17 @@ uint8_t Endpoint_Discard_Stream(uint16_t Length
 #include "Template/Template_Endpoint_Control_W.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_Control_Stream_BE\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(*((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_Control_W.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_Control_PStream_BE\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(pgm_read_byte((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_Control_W.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Write_Control_EStream_BE\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         Endpoint_Write_Byte(eeprom_read_byte((uint8_t*)BufferPtr--))\r
 #include "Template/Template_Endpoint_Control_W.c"\r
 \r
@@ -320,12 +323,12 @@ uint8_t Endpoint_Discard_Stream(uint16_t Length
 #include "Template/Template_Endpoint_Control_R.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Read_Control_Stream_BE\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         *((uint8_t*)BufferPtr--) = Endpoint_Read_Byte()\r
 #include "Template/Template_Endpoint_Control_R.c"\r
 \r
 #define  TEMPLATE_FUNC_NAME                        Endpoint_Read_Control_EStream_BE\r
-#define  TEMPLATE_BUFFER_OFFSET(Length)            Length - 1\r
+#define  TEMPLATE_BUFFER_OFFSET(Length)            (Length - 1)\r
 #define  TEMPLATE_TRANSFER_BYTE(BufferPtr)         eeprom_write_byte((uint8_t*)BufferPtr--, Endpoint_Read_Byte())\r
 #include "Template/Template_Endpoint_Control_R.c"\r
 \r