Much more efficient algorithm for the Endpoint/Pipe configuration routine of unordere...

[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 56c73fc..9d13ead 100644 (file)
--- a/LUFA/Drivers/USB/LowLevel/Endpoint.c
+++ b/LUFA/Drivers/USB/LowLevel/Endpoint.c
@@ -52,46 +52,41 @@ bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number,
        UECFG1X = UECFG1XData;
 
        return Endpoint_IsConfigured();
-#else
-       uint8_t UECFG0XTemp[ENDPOINT_TOTAL_ENDPOINTS];
-       uint8_t UECFG1XTemp[ENDPOINT_TOTAL_ENDPOINTS];
-       uint8_t UEIENXTemp[ENDPOINT_TOTAL_ENDPOINTS];
-       
-       for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
+#else  
+       for (uint8_t EPNum = Number; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
        {
+               uint8_t UECFG0XTemp;
+               uint8_t UECFG1XTemp;
+               uint8_t UEIENXTemp;
+
                Endpoint_SelectEndpoint(EPNum);
-               UECFG0XTemp[EPNum] = UECFG0X;
-               UECFG1XTemp[EPNum] = UECFG1X;
-               UEIENXTemp[EPNum]  = UEIENX;
-       }
-       
-       UECFG0XTemp[Number] = UECFG0XData;
-       UECFG1XTemp[Number] = UECFG1XData;
-       UEIENXTemp[Number]  = 0;
-       
-       for (uint8_t EPNum = 1; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
-       {
-               Endpoint_SelectEndpoint(EPNum); 
-               UEIENX  = 0;
-               UEINTX  = 0;
-               UECFG1X = 0;
-               Endpoint_DisableEndpoint();
-       }
+               
+               if (EPNum == Number)
+               {
+                       UECFG0XTemp = UECFG0XData;
+                       UECFG1XTemp = UECFG1XData;
+                       UEIENXTemp  = 0;
+               }
+               else
+               {
+                       UECFG0XTemp = UECFG0X;
+                       UECFG1XTemp = UECFG1X;
+                       UEIENXTemp  = UEIENX;
+               }
 
-       for (uint8_t EPNum = 0; EPNum < ENDPOINT_TOTAL_ENDPOINTS; EPNum++)
-       {
-               if (!(UECFG1XTemp[EPNum] & (1 << ALLOC)))
+               if (!(UECFG1XTemp & (1 << ALLOC)))
                  continue;
-               
-               Endpoint_SelectEndpoint(EPNum);         
-               Endpoint_EnableEndpoint();
 
-               UECFG0X = UECFG0XTemp[EPNum];
-               UECFG1X = UECFG1XTemp[EPNum];
-               UEIENX  = UEIENXTemp[EPNum];
-               
+               Endpoint_DisableEndpoint();
+               UECFG1X &= (1 << ALLOC);
+
+               Endpoint_EnableEndpoint();
+               UECFG0X = UECFG0XTemp;
+               UECFG1X = UECFG1XTemp;
+               UEIENX  = UEIENXTemp;
+                       
                if (!(Endpoint_IsConfigured()))
-                 return false;
+                 return false;                 
        }
        
        Endpoint_SelectEndpoint(Number);