Keil ARM-CM3 printf输出调试信息到Debug (printf) Viewer

it2026-08-17  9

参考资料:http://www.keil.com/support/man/docs/jlink/jlink_trace_itm_viewer.htm

 

 

1.Target Options -> Debug -> Settings(JLink) -> Debug里ort选择SW模式

2.在Target Options -> Debug -> Settings(JLink) -> Trace里选择Enable

3.Core freq设为120MHz(以LPC1788为例)

4. 设置ITM Port的值如下所示

5.在工程中添加.c文件如下

#include "stdio.h" #define ITM_Port8(n) (*((volatile unsigned char *)(0xE0000000+4*n))) #define ITM_Port16(n) (*((volatile unsigned short*)(0xE0000000+4*n))) #define ITM_Port32(n) (*((volatile unsigned long *)(0xE0000000+4*n))) #define DEMCR (*((volatile unsigned long *)(0xE000EDFC))) #define TRCENA 0x01000000 struct __FILE { int handle; /* Add whatever you need here */ }; FILE __stdout; FILE __stdin; int fputc(int ch, FILE *f) { if (DEMCR & TRCENA) { while (ITM_Port32(0) == 0); ITM_Port8(0) = ch; } return(ch); }

6.用Debug模式运行工程,Debug (printf) Viewer中即可以查看printf的输出信息。

转载于:https://www.cnblogs.com/GBRgbr/p/4450556.html

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