add prj debug print

myapps/practice/00b-uart-debug/src/main.c

@@ -0,0 +1,24 @@
+// RXD3/TXD3: PA4/PA5
+
+
+#include "CH59x_common.h"
+#include <string.h>
+
+
+int main()
+{
+  char *s = "Hello world\r\n";
+  SetSysClock(CLK_SOURCE_PLL_60MHz);
+  
+#ifdef DEBUG
+  GPIOA_ModeCfg(bTXD3, GPIO_ModeOut_PP_5mA);
+  UART3_DefInit();
+#endif
+  
+  while (1) {
+    //UART3_SendString((uint8_t *)s, strlen(s));
+    PRINT(s);
+    mDelaymS(1000);
+  }
+  
+}