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"
/**
****************************************************************************************
* @brief
function used to Print data in a fixed format
*
* @param[in]
fmt
(Print format)
*
size
(The size of the data)
*
count
(Length of data)
*
buffer
(The address where data is stored)
*
* @return
0(successful) or -1(fail)
****************************************************************************************
*/
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++] = '';
}
HAL_PRINT("%s",buf);
return len;
}

3.hal_print.h

#ifndef __HAL_PRINT_H__
#define __HAL_PRINT_H__
/*******************************************************************************************
* @brief Header files and macro definitions differ on each platform.
*
*******************************************************************************************/
#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:rn");
DUMP8("0x%02x ", dataBuf, 30);
printf("rnDUMP16:rn");
DUMP16("0x%04x ", dataBuf, 20);
printf("rnDUMP32:rn");
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

最后

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