1.前言

经常在编程时会遇到打印Data Buffer的情况，下面定义了DUMP8、DUMP16、DUMP32，很方便来打印Data Buffer里面的数据。

2.hal_print.c

#include "hal_print.h"


int hal_print_dump(const char *fmt, unsigned int size,  unsigned int count, const void *buffer)
{ 
	char buf[255];
	unsigned int len=0,i=0;

	switch( size )
	{ 
		case sizeof(uint32_t):
			while(i<count && len<sizeof(buf))
			{ 
				len += HAL_SNPRINTF(&buf[len], sizeof(buf) - len, fmt, *(uint32_t *)((uint32_t *)buffer+i));
				i++;
			}
			break;
		case sizeof(uint16_t):
				while(i<count && len<sizeof(buf))
				{ 
					len += HAL_SNPRINTF(&buf[len], sizeof(buf) - len, fmt, *(uint16_t *)((uint16_t *)buffer+i));
					i++;
				}
				break;
		case sizeof(uint8_t):
		default:
			while(i<count && len<sizeof(buf))
			{ 
				len += HAL_SNPRINTF(&buf[len], sizeof(buf) - len, fmt, *(uint8_t *)((uint8_t *)buffer+i));
				i++;
			}
			break;
	}

    if (len + 1 < sizeof(buf)) { 
        buf[len++] = '\r';
    }
    if (len + 1 < sizeof(buf)) { 
        buf[len++] = '\n';
    }
    if (len + 1 < sizeof(buf)) { 
        buf[len++] = '\0';
    }

    HAL_PRINT("%s",buf);

	return len;
}

3.hal_print.h

#ifndef __HAL_PRINT_H__
#define __HAL_PRINT_H__


#include "stdio.h"
#include "stdint.h"

#define HAL_SNPRINTF snprintf
#define HAL_PRINT printf


int hal_print_dump(const char *fmt, unsigned int size,  unsigned int count, const void *buffer);


#define DUMP8(str, buf, cnt) hal_print_dump(str, sizeof(uint8_t), cnt, buf)
#define DUMP16(str, buf, cnt) hal_print_dump(str, sizeof(uint16_t), cnt, buf)
#define DUMP32(str, buf, cnt) hal_print_dump(str, sizeof(uint32_t), cnt, buf)

#endif // __HAL_PRINT_H__

4.main.c

#include "stdio.h"
#include "stdint.h"
#include "hal_print.h"

uint8_t dataBuf[52];

int main(void)
{ 
	uint8_t i;
	
	// init data 
	for(i = 0; i < sizeof(dataBuf); i++)
	{ 
		dataBuf[i] = i + 1;
	}
	
	// print data
	printf("DUMP8:\r\n");
	DUMP8("0x%02x ", dataBuf, 30);
	
	printf("\r\nDUMP16:\r\n");
	DUMP16("0x%04x ", dataBuf, 20);
	
	printf("\r\nDUMP32:\r\n");
	DUMP32("0x%08x ", dataBuf, 10);
	
	return 0;
}

5.测试效果

6.资料下载

完整的代码下载地址如下：
https://download.csdn.net/download/ZHONGCAI0901/15482516