Devan Lai / USBDevice_STM32F103

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Dependents:   STM32F103C8T6_WebUSBDFU STM32F103C8T6_USBDFU STM32F103C8T6_USBDFU dfu_usb_stm32f103

Fork of USBDevice_STM32F103 by Zoltan Hudak

Diff: USBDevice/USBHAL_KL25Z.cpp

Revision:
14:d495202c90f4
Parent:
13:16731886c049
Child:
20:d38b72fed893
--- a/USBDevice/USBHAL_KL25Z.cpp	Tue Sep 10 15:14:55 2013 +0300
+++ b/USBDevice/USBHAL_KL25Z.cpp	Thu Sep 12 14:45:27 2013 +0100
@@ -169,6 +169,16 @@
     USB0->CTL &= ~USB_CTL_USBENSOFEN_MASK;
     // Pull up disable
     USB0->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
+
+    //Free buffers if required:
+    for (int i = 0; i<(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2; i++) {
+        free(endpoint_buffer[i]);
+        endpoint_buffer[i] = NULL;
+    }
+    free(endpoint_buffer_iso[2]);
+    endpoint_buffer_iso[2] = NULL;
+    free(endpoint_buffer_iso[0]);
+    endpoint_buffer_iso[0] = NULL;
 }
 
 void USBHAL::configureDevice(void) {
@@ -200,18 +210,22 @@
     if ((flags & ISOCHRONOUS) == 0) {
         handshake_flag = USB_ENDPT_EPHSHK_MASK;
         if (IN_EP(endpoint)) {
-            endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD )] = (uint8_t *) malloc (64*2);
-            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD )][0];
+            if (endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] == NULL)
+                endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] = (uint8_t *) malloc (64*2);
+            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
         } else {
-            endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD )] = (uint8_t *) malloc (64*2);
-            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD )][0];
+            if (endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] == NULL)
+                endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] = (uint8_t *) malloc (64*2);
+            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
         }
     } else {
         if (IN_EP(endpoint)) {
-            endpoint_buffer_iso[2] = (uint8_t *) malloc (1023*2);
+            if (endpoint_buffer_iso[2] == NULL)
+                endpoint_buffer_iso[2] = (uint8_t *) malloc (1023*2);
             buf = &endpoint_buffer_iso[2][0];
         } else {
-            endpoint_buffer_iso[0] = (uint8_t *) malloc (1023*2);
+            if (endpoint_buffer_iso[0] == NULL)
+                endpoint_buffer_iso[0] = (uint8_t *) malloc (1023*2);
             buf = &endpoint_buffer_iso[0][0];
         }
     }