Starting to integrate usb branch.

Optimized Makefiles

discovery/src/main.c

@@ -0,0 +1,51 @@
+#include "main.h"
+#include "pixy.h"
+
+ USB_OTG_CORE_HANDLE          USB_OTG_Core;
+ USBH_HOST                    USB_Host;
+RCC_ClocksTypeDef RCC_Clocks;
+
+
+void SysTick_Handler(void)
+{
+  USBH_LL_systick();
+}
+
+void TIM2_IRQHandler(void)
+{
+  USB_OTG_BSP_TimerIRQ();
+}
+
+
+void OTG_FS_IRQHandler(void)
+{
+  USBH_OTG_ISR_Handler(&USB_OTG_Core);
+}
+
+
+int main(void)
+{ 
+  /* Initialize LEDS */
+  STM_EVAL_LEDInit(LED3);
+  STM_EVAL_LEDInit(LED4);
+  STM_EVAL_LEDInit(LED5);
+  STM_EVAL_LEDInit(LED6);
+  STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_GPIO);
+ 
+  /* Blue Led On: start of application */
+  STM_EVAL_LEDOn(LED6);
+       
+  /* SysTick end of count event each 1ms */
+  RCC_GetClocksFreq(&RCC_Clocks); //we run at 168mhz :)
+  SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
+  
+  /* Init Host Library */
+  USBH_Init(&USB_OTG_Core, USB_OTG_FS_CORE_ID, &USB_Host, &USBH_MSC_cb, &USR_Callbacks);
+  
+  while (1)
+  {
+    /* Host Task handler */
+    USBH_Process(&USB_OTG_Core, &USB_Host);
+  }
+  
+}