一段log代码

发布于 2014-01-10 14:46:35 浏览：3692 订阅该版

如果想用在rtt中，请自行把printf替换为 rt_kprintf。

**log.h 头文件**
```
#ifndef LOG_H
#define LOG_H

#define LOG_LEVEL_NOISY -1
#define LOG_LEVEL_NORMAL 0
#define LOG_LEVEL_SERIOUS 1
#define LOG_LEVEL_DEAD 2
#define LOG_LEVEL_NOMSG 100

#define LOG_LEVEL LOG_LEVEL_NORMAL

#define TENDSTR "
"

#define log_msg(level, prefix, suffix, errFmt, ...) 
    do { 
        if (level >= LOG_LEVEL) 
            printf(prefix errFmt suffix, ##__VA_ARGS__); 
    } while(0)

#define LOGE(fmt, ...) log_msg(LOG_LEVEL_DEAD, "E/", TENDSTR, fmt, ##__VA_ARGS__)
#define LOGD(fmt, ...) log_msg(LOG_LEVEL_NORMAL,"D/", TENDSTR, fmt, ##__VA_ARGS__)
#define LOGI(fmt, ...) log_msg(LOG_LEVEL_NORMAL,"I/", TENDSTR, fmt, ##__VA_ARGS__)

extern void dumphex(uint8_t* buf, int32_t len);

#define DUMPHEX(level, buf, len)  
    do { 
        if (level >= LOG_LEVEL) 
            dumphex(buf, len); 
    } while(0)

#define LOG8(exp)               LOGD(#exp "= 0x%02x[%d]", exp, exp)
#define LOG16(exp)              LOGD(#exp "= 0x%04x[%d]", exp, exp)
#define LOG24(exp)              LOGD(#exp "= 0x%08x[%d]", exp, exp)
#define LOG32(exp)              LOGD(#exp "= 0x%08x[%d]", exp, exp)
#define LOG64(exp)              LOGD(#exp "= 0x%llx[%d]", exp, exp)
#define LOGDUMP(buf, len)       DUMPHEX(LOG_LEVEL_NORMAL, buf, len)

#endif //LOGH
```

```
//原dumhex实现可参考3楼，由于实现的较冗长，建议使用2楼bernard给出的dumphex函数，比较精简。
```

**使用用例**
```
    dl->manufacturer_code = buf[0];
    dl->hardware_code = buf[1];
    dl->load_sequence_number = buf[2];
    dl->partition_count = buf[3];
    dl->loader_gte_v3 = (buf[4] & (1<<6)) ? 1 : 0;
    dl->key_load = (buf[4] & (1<<5)) ? 1 : 0;
    dl->text_length = buf[4] & 0x1F;
    dl->text_character = &buf[5];

LOG8(dl->manufacturer_code);
    LOG8(dl->hardware_code);
    LOG8(dl->load_sequence_number);
    LOG8(dl->partition_count);
    LOG8(dl->loader_gte_v3);
    LOG8(dl->key_load);
    LOG8(dl->text_length);
    LOGDUMP(dl->text_character, dl->text_length);
```

=================================================================
效果如下
![1.jpg](/uploads/3230_314f3b949e7fc03b8e197a40952eb1c4.jpg)

关于dumphex实现，二楼bernard的实现更简洁～ 为了使大家关注重点，我决定把原dumphex代码移动至3楼。

**编辑历史**
2014年1月10日晚11点修改：简单修改了下 DUMPHEX宏实现，与LOGD等保持一致。

7 个回答

Yafei 2014-01-10

这家伙很懒，什么也没写！

bernard 2014-01-10

这家伙很懒，什么也没写！

yfj300 2014-01-10

这家伙很懒，什么也没写！

prife 2014-01-10

这家伙很懒，什么也没写！

原来首楼的dumphex实现，原来实现的较冗长，为了使大家关注重点，将其移动至本楼

```

void dumphex(uint8_t* buf, int32_t len)
{
    static char membuf[1024];
    uint8_t *ptr = (uint8_t *)buf;
    char * ibuf = membuf;
    int32_t i, j;
    int len1, len2;

len1 = len / 16 * 16;
    len2 = len % 16;
    ibuf[0]=0;

#define BIN2CHAR(ch) (((ch) > ' ' && (ch) <= '~') ? (ch) : '.')

for (i=0; i<len1; i+=16)
    {
        sprintf(ibuf, "%04x  ", i);
        ibuf += 6;
        for (j=0; j<16; j++)
        {
            sprintf(ibuf, "%02x ", ptr[j]);
            ibuf += 3;
        }
        sprintf(ibuf, "  ");
        ibuf += 2;
        for (j=0; j<16; j++)
        {
            sprintf(ibuf, "%c", BIN2CHAR(ptr[j]));
            ibuf ++;
        }
        sprintf(ibuf, "
");
        ibuf ++;
        ptr += 16;
    }

if (len2 == 0)
        goto __print;

sprintf(ibuf, "%04x  ",((len >> 4) << 4));
    ibuf += 6;
    for (i=0; i<len2; i++)
    {
        sprintf(ibuf, "%02x ", ptr[i]);
        ibuf += 3;
    }
    for (i=len2; i<16; i++)
    {
        sprintf(ibuf, "   ");
        ibuf += 3;
    }
    sprintf(ibuf, "  ");
    ibuf += 2;
    for (i=0; i<len2; i++)
    {
        sprintf(ibuf, "%c",  BIN2CHAR(ptr[i]));
        ibuf += 1;
    }

sprintf(ibuf, "
");

__print:
    printf("%s", membuf);
}

```