请教，如何通过JTAG把printf信息打在keil的debug viewer上
答案:1 悬赏:40 手机版
解决时间 2021-01-10 12:01
- 提问者网友：不爱我么
- 2021-01-10 04:19
请教，如何通过JTAG把printf信息打在keil的debug viewer上
最佳答案
- 五星知识达人网友：琴狂剑也妄
- 2021-01-10 05:35
#include
#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;};
FILE __stdout;
FILE __STDIN;
int fputc(int ch,FILE* f)
{
if(DEMCR & TRCENA)
{
while(ITM_Port32(0) == 0);
ITM_Port8(0)=ch;
}
return(ch);
}
#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;};
FILE __stdout;
FILE __STDIN;
int fputc(int ch,FILE* f)
{
if(DEMCR & TRCENA)
{
while(ITM_Port32(0) == 0);
ITM_Port8(0)=ch;
}
return(ch);
}
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