宏定义编写技巧__调试技巧【原创】

带颜色打印：

printk("33[1;33;40m misc.c InterIoctl() action=%d33[0m ", action);

方法一、

#ifndef _PMU_DUMMY_

#define _PMU_DUMMY_

 

#define PAX_PMU_DUMMY_DEBUG_ENABLE

 

#ifdef PAX_PMU_DUMMY_DEBUG_ENABLE

#define PAX_PMU_DUMMY_DEBUG(x...)   do{printk("
");printk(x);printk("
");}while(0)

#else

#define PAX_PMU_DUMMY_DEBUG(x...)

#endif

 

#define REGULATOR_DUMMY        "dummy_regulator"

 

#endif

 方法二、

#define DEBUG_ENABLE   1

 

#if  DEBUG_ENABLE

#define PRINT(fmt, args...)  do{

        printf("<%s>【*%s()*】(%d):", __FILE__, __func__, __LINE__);

        printf(fmt, ##args);

}while(0)

#else

#define PRINT(fmt, args...)

#endif

方法三、

// 带格式的打印调试
int Serial_Printf(char *fmt, ...)
{
  va_list args;
  int printed = 0;
  
  uint8 printf_buf[MAX_PRINTF_LEN];
  
  va_start(args, fmt);
  printed = vsprintf((char*)printf_buf, fmt, args);
  va_end(args);
  
  printf_buf[MAX_PRINTF_LEN-1] = '';
  SerialPrintString(printf_buf);
  
  return printed;
}

/*
打印一个字符串
str不可以包含0x00，除非结尾
*/
void SerialPrintString(uint8 str[])
{
  HalUARTWrite (SBP_UART_PORT, str, osal_strlen((char*)str));
}

//#define DEBUG

#ifdef DEBUG
#define DEBUG_PRINT(format, ...)            Serial_Printf(format, ##__VA_ARGS__)
#define DEBUG_PRINT_BUFF(title, buff, len, display_char)  
                                            Serial_PrintBuffer(title, buff, len, display_char)
#else
#define DEBUG_PRINT(format, ...)
#define DEBUG_PRINT_BUFF(title, buff, len, display_char)
#endif  

方法四、

//console.c
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <pthread.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>


#include "Console.h"



/*----------------------------------------------------------*/
/*! rief Structure which will be copied into shared memory, in order to synchronize console output from
 *         different processes and threads.
 */
/*----------------------------------------------------------*/
typedef struct {
    ///If set to true, there is an segmented print ongoing (Start, Continue, Exit).
    bool criticalSection;
    ///Handle of the shared mutex.
    pthread_mutex_t mutex;
} shared_data;

/*----------------------------------------------------------*/
/*! rief Pointer to the shared memory instance.
 */
/*----------------------------------------------------------*/
static shared_data* data = NULL;

void show_read(unsigned char *str, unsigned char *buff, unsigned int len)
{        
    ConsolePrintfStart("serial-RX: %s [", str);
    for (int i = 0; i < len; i++) {
        ConsolePrintfContinue("%02X ", buff[i]);
    }
    ConsolePrintfExit("]
");
}

void ConsoleInit(void)
{
    pthread_mutexattr_t attr;
    int prot = PROT_READ | PROT_WRITE;
    int flags = MAP_SHARED | MAP_ANONYMOUS;
    data = (shared_data*)mmap(NULL, sizeof(shared_data), prot, flags, -1, 0);

    data->criticalSection = false;

    pthread_mutexattr_init(&attr);
    pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
    pthread_mutex_init(&data->mutex, &attr);
}

void ConsoleDeinit(void)
{
    munmap(data, sizeof(data));
    data = NULL;
}

void ConsolePrintf(const char *statement, ...)
{
    int err;
    if (NULL == data) {
        printf("ConsolePrintf data was null
");
        while (true);
    }
    if (0 != (err = pthread_mutex_lock(&data->mutex))) {
        printf("ConsolePrintf, pthread_mutex_lock error: %d
", err);
    }
    if (NULL != statement) {
        va_list args;
        va_start(args, statement);
        vprintf(statement, args);
        va_end(args);
    }
    if (0 != (err = pthread_mutex_unlock(&data->mutex))) {
        printf("ConsolePrintf, pthread_mutex_unlock error: %d
", err);
        while (true);
    }
}


void ConsolePrintfStart(const char *statement, ...)
{
    int err;
    if (NULL == data) {
        printf("ConsolePrintfStart data was null
");
        while (true);
    }
    if (0 != (err = pthread_mutex_lock(&data->mutex))) {
        printf("ConsolePrintfStart, pthread_mutex_lock error: %d
", err);
    }
    data->criticalSection = true;

    if (NULL != statement) {
        va_list args;
        va_start(args, statement);
        vprintf(statement, args);
        va_end(args);
    }
}

void ConsolePrintfContinue(const char *statement, ...)
{
    if (NULL == data) {
        printf("ConsolePrintfContinue data was null
");
        while (true);
    }
    if (!data->criticalSection) {
        printf("ConsolePrintfContinue not in critical section
");
        while (true);
    }

    if (NULL != statement) {
        va_list args;
        va_start(args, statement);
        vprintf(statement, args);
        va_end(args);
    }
}

void ConsolePrintfExit(const char *statement, ...)
{
    int err;
    if (NULL == data) {
        printf("ConsolePrintfExit data was null
");
        while (true);
    }
    if (!data->criticalSection) {
        printf("ConsolePrintfExit not in critical section
");
        while (true);
    }
    if (NULL != statement) {
        va_list args;
        va_start(args, statement);
        vprintf(statement, args);
        va_end(args);
    }
    data->criticalSection = false;
    if (0 != (err = pthread_mutex_unlock(&data->mutex))) {
        printf("ConsolePrintfExit, pthread_mutex_unlock error: %d
", err);
        while (true);
    }
}

//console.h
/*----------------------------------------------------------*/
/*! file
 *  rief This file contains C-functions starting with "Console" to provide
 *         process and thread safe access to the console output.
 */
/*----------------------------------------------------------*/
#ifndef _CONSOLE_H_
#define _CONSOLE_H_

#define RESETCOLOR "33[0m"
#define GREEN      "33[0;32m"
#define RED        "33[0;31m"
#define YELLOW     "33[1;33m"
#define BLUE       "33[0;34m"


#ifdef __cplusplus
extern "C"
{
#endif

    void show_read(unsigned char *str, unsigned char *buff, unsigned int len);
    /*----------------------------------------------------------*/
    /*! rief Initializes the resources needed to synchronize between processes and threads.
     *  
ote This function must be called before any other function of this component.
     *
     */
    /*----------------------------------------------------------*/
    void ConsoleInit(void);

    /*----------------------------------------------------------*/
    /*! rief Destroys the resources needed to synchronize between processes and threads.
     *  
ote After this function, any other function (except ConsoleInit) must not be called.
     *
     */
    /*----------------------------------------------------------*/
    void ConsoleDeinit(void);

    /*----------------------------------------------------------*/
    /*! rief Uses the board specific PRINT mechanism and provides thread and process safety.
     *
     */
    /*----------------------------------------------------------*/
    void ConsolePrintf(const char *statement, ...);

    /*----------------------------------------------------------*/
    /*! rief Starts to print and stay blocked after exit of this function
     *
     */
    /*----------------------------------------------------------*/
    void ConsolePrintfStart(const char *statement, ...);

    /*----------------------------------------------------------*/
    /*! rief Continue to print and stay blocked after exit of this function
     *  
ote ConsolePrintfStart must be called before and when finished ConsolePrintfExit must be called.
     *  
ote This function may be called multiple times.
     */
    /*----------------------------------------------------------*/
    void ConsolePrintfContinue(const char *statement, ...);

    /*----------------------------------------------------------*/
    /*! rief Continue to print and unblock after finishing.
     *  
ote ConsolePrintfStart must be called before. ConsolePrintfContinue may have been called before multiple times.
     */
    /*----------------------------------------------------------*/
    void ConsolePrintfExit(const char *statement, ...);

#ifdef __cplusplus
}
#endif

#endif //_CONSOLE_H_

#ifndef _BASE_H_
#define _BASE_H_


#include <stdio.h>     
#include <stdlib.h>   
#include <unistd.h>     
#include <sys/types.h> 
#include <sys/stat.h>  
#include <fcntl.h>    
#include <termios.h>  
#include <errno.h>    
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <setjmp.h>
#include <sys/mman.h>


#include "uart.h"
#include "Console.h"


//#define DEBUG

#ifdef DEBUG
    #define DEBUG_PRINT(format, ...)    ConsolePrintf(format, ##__VA_ARGS__);
    #define SHOW_READ(format, ...)    show_read(format, ##__VA_ARGS__);
#else
    #define DEBUG_PRINT(format, ...)
    #define SHOW_READ(format, ...)
#endif


#define     FALSE        0
#define     TRUE        1


typedef unsigned char   BYTE;           //  8-bit
typedef unsigned short  WORD;           // 16-bit
typedef unsigned long   DWORD;          // 32-bit
typedef unsigned char        u8;
typedef unsigned short        u16;
typedef unsigned int        u32;
typedef unsigned long long    u64;
typedef unsigned char        uint8;
typedef unsigned short        uint16;
typedef unsigned int        uint32;
typedef unsigned long long    uint64;



/* takes a byte out of a uint32 : var - uint32,  ByteNum - byte to take out (0 - 3) */
#define BREAK_UINT32( var, ByteNum ) 
          (uint8)((uint32)(((var) >>((ByteNum) * 8)) & 0x00FF))

#define BUILD_UINT32(Byte0, Byte1, Byte2, Byte3) 
          ((uint32)((uint32)((Byte0) & 0x00FF) 
          + ((uint32)((Byte1) & 0x00FF) << 8) 
          + ((uint32)((Byte2) & 0x00FF) << 16) 
          + ((uint32)((Byte3) & 0x00FF) << 24)))

#define BUILD_UINT16(loByte, hiByte) 
          ((uint16)(((loByte) & 0x00FF) + (((hiByte) & 0x00FF) << 8)))

#define HI_UINT16(a) (((a) >> 8) & 0xFF)
#define LO_UINT16(a) ((a) & 0xFF)

#define BUILD_UINT8(hiByte, loByte) 
          ((uint8)(((loByte) & 0x0F) + (((hiByte) & 0x0F) << 4)))

#define HI_UINT8(a) (((a) >> 4) & 0x0F)
#define LO_UINT8(a) ((a) & 0x0F)



#endif

printk 调试方法

方法1：

//#define MY_DEBUG
#ifdef MY_DEBUG
#define MY_DBG(x...) do{printk(x);}while(0)
#else
#define MY_DBG(x...)
#endif

方法2：

驱动可以如下写：

#define MY_LEVEL1 (1 << 0)
#define MY_LEVEL2 (1 << 1)

unsigned int my_trace_param=0;
module_param_named(trace, my_trace_param, uint, S_IRUGO|S_IWUSR);

#define MY_DBG(flag, msg...)
do {
if (my_trace_param & flag)
printk(KERN_ERR "zbh-debug: " msg);
} while (0)

MY_DBG(MY_LEVEL1, "Goodbye module exit1. ");
MY_DBG(MY_LEVEL2, "Goodbye module exit2. ");
MY_DBG(MY_LEVEL2, "Goodbye module exit3. ");

测试：

insmod my_printk_driver.ko 

echo 2 > /sys/module/my_printk_driver/parameters/trace 

这样就可以选择到底打印哪一条语句，用来动态调试开关，默认关打印

code:

#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include<linux/slab.h>        //kmalloc
#include<asm/io.h>            //ioremap
#include<linux/device.h>    //class_create/device_create
#include <asm/uaccess.h>
#include <linux/pwm.h>
#include <linux/cdev.h>
#include <pax/gpio_cfg.h>
#include <pax/bcm5830x_gpio_def.h>
#include <mach/iproc_regs.h>
#include <mach/memory.h>
#include <mach/iomux.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/timer.h>
#include <linux/hrtimer.h>
#include <linux/ktime.h>

#define PWM_IOC_MAGIC         'n'
#define PWM_CONFIG            _IOW(PWM_IOC_MAGIC, 1, int)
#define PWM_DISABLE            _IOW(PWM_IOC_MAGIC, 2, int)
#define ONE_PWM_CONFIG      _IOW(PWM_IOC_MAGIC, 3, int)
#define ONE_PWM_DISABLE     _IOW(PWM_IOC_MAGIC, 4, int)
#define ONE_PWM_WHILE_10000 _IOW(PWM_IOC_MAGIC, 5, int)
#define SET_PWM_GPIO        _IOW(PWM_IOC_MAGIC, 6, int)
#define SET_PWM_POLATIRY    _IOW(PWM_IOC_MAGIC, 7, int)
#define READ_ONEPLUSE_COUNTER  _IOW(PWM_IOC_MAGIC, 8, int)
#define SET_PWM_FUNC           _IOW(PWM_IOC_MAGIC, 9, int)
#define SET_PWM_WHILE           _IOW(PWM_IOC_MAGIC, 10, int)
#define ONE_PWM_DOORBELL           _IOW(PWM_IOC_MAGIC, 11, int)


#define MY_LEVEL1                    (1 << 0)
#define MY_LEVEL2                    (1 << 1)

unsigned int my_trace_param = 0;
module_param_named(trace, my_trace_param, uint, S_IRUGO|S_IWUSR);


#define MY_DBG(flag, msg...) 
    do { 
        if (my_trace_param & flag) 
            printk(KERN_ERR "zbh-bbl: " msg); 
    } while (0)


static int ttime = 0;
static int pmode = 0; // pmode=0 ----> asiu_pwmc , pmode=1 ----> onepluse

module_param(ttime, int, 0);
module_param(pmode, int, 0);


//module_param(period, int, 0);

#define HELLO_MAJOR 230
int hello_major = HELLO_MAJOR;

module_param(hello_major, int, 0);

static struct cdev *hello_cdev = NULL;
static struct class *dev_class = NULL;
static struct device *dev_device = NULL;


static int hello_open(struct inode *inode, struct file *filp);
static int hello_release(struct inode *inode, struct file *filp);

static int hello_open(struct inode *inode, struct file *filp)
{
    printk("hello_open is OK
");
    return 0;
}

static int hello_release(struct inode *inode, struct file *filp)
{
    printk("hello_release is OK
");

    printk("pwm disable and free
");
    return 0;
}

struct file_operations hello_ops = {
    .owner    = THIS_MODULE,
    .open    = hello_open,
    .release     = hello_release,
    //.unlocked_ioctl = hello_ioctl,
};

static int __init hello_init(void)
{
    dev_t devno;
    int ret;

    devno = MKDEV(hello_major, 0);
    ret = register_chrdev_region(devno, 1, "zbh_hello");
    if (!ret) {
        printk("register dev OK.
");
    }
    else {
        printk("register dev failed.
");
    }

    hello_cdev = cdev_alloc();
    cdev_init(hello_cdev, &hello_ops);
    cdev_add(hello_cdev, devno, 1);
    hello_cdev->owner = THIS_MODULE;
    hello_cdev->ops = &hello_ops;

    dev_class = class_create(THIS_MODULE, "dev_class");
    if (IS_ERR(dev_class)) {
        printk(KERN_ERR "class_create() failed for dev_class
");
        ret = -EINVAL;
        goto out_err_1;
    }

    dev_device = device_create(dev_class, NULL, devno, NULL, "zbh_hello");
    if (IS_ERR(dev_device)) {
        printk(KERN_ERR "device_create failed.
");
        ret = -ENODEV;
        goto out_err_2;
    }
    
    printk("Hello module init OK.
");

    return 0;

out_err_2:
    class_destroy(dev_class);

out_err_1:
    unregister_chrdev_region(MKDEV(hello_major, 0), 1);
    cdev_del(hello_cdev);
    return ret;
}

static void __exit hello_exit(void)
{
    cdev_del(hello_cdev);

    device_destroy(dev_class, MKDEV(hello_major, 0));
    class_destroy(dev_class);

    unregister_chrdev_region(MKDEV(hello_major, 0), 1);

    MY_DBG(MY_LEVEL1, "Goodbye module exit1.
");
    MY_DBG(MY_LEVEL2, "Goodbye module exit2.
");
    MY_DBG(MY_LEVEL2, "Goodbye module exit3.
");
}

module_init(hello_init);
module_exit(hello_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("zhangbinghua");
MODULE_DESCRIPTION("zhangbh debug driver");

 #ifdef MISC_RF_NEEDED
 #define RF_MISC_CTRL(name, dev_id)
 static ACTION_DATA name ={
 .dev_Id=dev_id,
 .boot_on=BOOT_POWEROFF,
 .flag=FLAG_ACTION_BASE|FLAG_ACTION_SLEEP,
 }
 #define __RF_MISC(name) RF_MISC_CTRL(name, #name)
#define RF_MISC(name) __RF_MISC(rf_##name)

 RF_MISC(red);
 RF_MISC(green);
 RF_MISC(blue);
 #endif