使用make -f Makeboot 来使用gcc编译

添加 DMod_FireBusReadDatasV2_RC 函数

source/rt_thread/board.c

@@ -220,11 +220,21 @@ void cpy4byte(uint32_t *dst,uint32_t *src,int num_4byte)
 
 
 
+#ifdef __GNUC__
+
+/* With GCC, small printf (option LD Linker->Libraries->Small printf
+   set to 'Yes') calls __io_putchar() */
+#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
+
+#else
+
+#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
+#pragma import(__use_no_semihosting)   
+
+#endif /* __GNUC__ */
 
 
 
-#pragma import(__use_no_semihosting)             
-
 struct __FILE 
 { 
 	int handle; 
@@ -237,7 +247,7 @@ void _sys_exit(int x)
 	x = x; 
 } 
 
-int fputc(int ch, FILE *f)
+PUTCHAR_PROTOTYPE
 {
 //	SEGGER_RTT_PutChar(0,ch);
 	return ch;