3 files changed, 12 insertions, 14 deletions
diff --git a/software/mpu/board/board.h b/software/mpu/board/board.h
index 3004909..465a864 100644
--- a/software/mpu/board/board.h
+++ b/software/mpu/board/board.h
@@ -41,10 +41,8 @@
 /*
  * IO pins assignments.
  */
-#define LED__PIN                8
-#define LED__PORT               GPIOA
-#define USB_DISC__PIN           13
-#define USB_DISC__PORT          GPIOA
+#define GPIOA_LED               8
+#define GPIOA_USB_DISC          13
 
 /*
  * I/O ports initial setup, this configuration is established soon after reset
@@ -133,14 +131,12 @@
 #define VAL_GPIOGODR            0xFFFFFFFF
 
 /*
- * USB bus activation macro, required by the USB driver.
+ * These macros are needed by the USB driver but for compatibility
+ * with STM32F405-style processors not used.
  */
-#define usb_lld_connect_bus(usbp) palClearPad(USB_DISC__PORT, USB_DISC__PIN)
+#define usb_lld_connect_bus(usbp)
+#define usb_lld_disconnect_bus(usbp)
 
-/*
- * USB bus de-activation macro, required by the USB driver.
- */
-#define usb_lld_disconnect_bus(usbp) palSetPad(USB_DISC__PORT, USB_DISC__PIN)
 
 #if !defined(_FROM_ASM_)
 #ifdef __cplusplus
diff --git a/software/mpu/heartbeat.c b/software/mpu/heartbeat.c
index 120fe48..21a3375 100644
--- a/software/mpu/heartbeat.c
+++ b/software/mpu/heartbeat.c
@@ -41,13 +41,13 @@ static msg_t Heartbeat(void *arg)
   (void)arg;
   chRegSetThreadName("heartbeat");
   while (TRUE) {
-    palClearPad(LED__PORT, LED__PIN);
+    palClearPad(GPIOA, GPIOA_LED);
     chThdSleepMilliseconds(50);
-    palSetPad(LED__PORT, LED__PIN);
+    palSetPad(GPIOA, GPIOA_LED);
     chThdSleepMilliseconds(50);
-    palClearPad(LED__PORT, LED__PIN);
+    palClearPad(GPIOA, GPIOA_LED);
     chThdSleepMilliseconds(50);
-    palSetPad(LED__PORT, LED__PIN);
+    palSetPad(GPIOA, GPIOA_LED);
     chThdSleepMilliseconds(850);
   }
 }
diff --git a/software/mpu/usb-cdc-shell.c b/software/mpu/usb-cdc-shell.c
index 9aa2f41..3a8fb70 100644
--- a/software/mpu/usb-cdc-shell.c
+++ b/software/mpu/usb-cdc-shell.c
@@ -282,10 +282,12 @@ void usbCDCShellInit(void)
   sduObjectInit(&SDU1);
   sduStart(&SDU1, &serusbcfg);
 
+  palSetPad(GPIOA, GPIOA_USB_DISC);
   usbDisconnectBus(serusbcfg.usbp);
   chThdSleepMilliseconds(1500);
   usbStart(serusbcfg.usbp, &usbcfg);
   usbConnectBus(serusbcfg.usbp);
+  palClearPad(GPIOA, GPIOA_USB_DISC);
 
   shellInit();
 }