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README
Apache-2.0

CX_Library::Debug

Version 1.0 基本框架+示例代码

  该库是依赖了格式化库cx_format和链表库cx_list以及C标准库stdio,string实现的一个高度硬件抽象的调试库,主要应用在裸机嵌入式平台串口调试(也可用于PC端控制台)。

Macro
  • PUTC_ENABLED putc函数可用标志宏,用于debug库输出调试信息,若该宏不启用,则无法使用GET方法
Enum

typedef enum
{
CX_DATATYPE_INT8,
CX_DATATYPE_UINT8,
CX_DATATYPE_INT16,
CX_DATATYPE_UINT16,
CX_DATATYPE_INT32,
CX_DATATYPE_UINT32,
CX_DATATYPE_INT64,
CX_DATATYPE_UINT64,
CX_DATATYPE_FLOAT,
CX_DATATYPE_DOUBLE,
CX_DATATYPE_CHAR,
CX_DATATYPE_STRING,
}cx_datatype_t;
用于指明变量类型

Struct
  • struct cx_debug_variable
    Member:
    • const char *name:变量名,检索变量时的关键词
    • cx_datatype_t type:变量的数据类型,务必正确指定,因为使用SET方法时会对下面的pdata指针做相应的强制指针转换,若设置不当可能造成内存访问越界
    • void * pdata:指向的实际内部变量的指针
  • struct cx_debug_command
    Member:
    • const char *name:命令名称,检索命令时的关键词
    • cx_cb_func_t handler: 命令回调函数格式为void (*func)(void *args),其中args为CMD中的参数部分   
Function
  • cx_err_t cx_debug_addVariable(cx_debug_variable_t *var);该函数用于注册一个监控变量
    • var:变量结构体指针
    • 返回值:CX_ERR_OK
  • cx_err_t cx_debug_addCommand(cx_debug_command_t *cmd);该函数用于注册一个命令
    • cmd:命令结构体指针
    • 返回值:CX_ERR_OK
  • cx_err_t cx_debug_handler(char *input);
    • input:出入的命令字符串,如:"SET a 100",设置变量a的值为100
    • 返回值:
      • CX_ERR_OK,成功解析
      • CX_ERR_NOMATCH, 命令错误,命令头不是SET GET 或 CMD
  • char * getStringField(char *dst, char *src);获取src字符串中的第一个值,同时返回下一个词的开始指针
    • dst:提取出的字符串存放位置
    • src:被解析的字符串
    • 返回值:从提取该词后方第一个非空格字符位置指针,如果后方已经无有效字符,则返回CX_NULL

串口/命令行使用方法:
SET Variable_name Value,设置变量值Variable_name=Value
GET Variable_name,返回变量信息,名称,类型和值
CMD Command_name args,调用命令Command_name(args)

示例代码片段(STM32 USART1)
/**main.c**/
unsigned char led_status = 0;
void led_controller(void)
{
    if(led_status)
    {
        LED_ON();
    }
    else
    {
        LED_OFF();
    }
}
int main(void)
{
    /**创建内部实际变量**/
    int a = 0;
    cx_int16_t PWM_Compare;
    float f;
    char char_buf[100];
    cx_debug_variable_t va = //声明一个调试变量
    {
        .name = "a",// 名称为"a",检索式使用这个字符串,比如 SET a 100,变量a的值设置为100
        .pdata = &a, //绑定到内部变量a
        .type = CX_DATATYPE_INT32 //声明变量类型为int32
    };
    cx_debug_variable_t vled = //同理
    {
        .name = "led",
        .pdata = &led_status,
        .type = CX_DATATYPE_UINT8
    };
    cx_debug_variable_t cmp = 
    {
        .name = "cmp",
        .pdata = &PWM_Compare,
        .type = CX_DATATYPE_INT16
    };
    cx_debug_variable_t vf = 
    {
        .name = "f",
        .pdata = &f,
        .type = CX_DATATYPE_FLOAT
    };
    cx_debug_command_t getInfo = //声明一个调试命令
    {
        .name = "getInfo", // 命令名称是getInfo用法: CMD getInfo args(args也可以是空,后面这一串字符串都会传递到下面那个回调函数)
        .handler = print_all_variable_info //命令回调函数,例如CMD getInfo string 等价于内部执行print_all_variable_info("string");
    };
    /**以下五句用于将声明的调试变量和调试函数注册到内部,只有注册后才能被使用**/
    cx_debug_addVariable(&va);
    cx_debug_addVariable(&vled);
    cx_debug_addVariable(&cmp);
    cx_debug_addVariable(&vf);
    cx_debug_addCommand(&getInfo);
    while(1)
    {
        led_controller();
    }
}
/**stm32f10x_it.c**/
char debug_input[64]; //串口输入缓冲区
cx_uint8_t current_pos = 0; //下一个字符串该插入的位置
void USART2_IRQHandler(void)
{
    if(USART_GetITFlags(USART1, USART_FLAGS_RXE) != RESET)
    { //接受中断,将受到的字符写入缓冲区,下一位置自增
        debug_input[current_pos] = USART2->DR;
        current_pos++;
        USART_ClearITPendingBit(USART1, USART_FLAGS_RXE);
    }
    if(USART_GetITStatus(USART1, USART_FLAGS_IDLE) != RESET)
    { //总线空闲中断,也就是发送结束中断,标志一次接受已经结束,给最后一个位置写入'\0'作为字符串终结符,把输入的命令传入cx_debug_handler()处理。完成后复位写入位置(current_pos = 0)
        USART_ClearITPendingBit(USART1, USART_FLAGS_IDLE);
        USART_ClearFlag(USART1, USART_FLAGS_IDLE);
        USART_ReceiveData(USART1); // IDLE中断需要再加一句读取DR寄存器来清除中断标志位,否则会一直卡中断
        debug_input[current_pos] = '\0';
        current_pos = 0;
        cx_debug_handler(debug_input);
    }
}

串口命令:

SET led 1/0 就可以开灯
GET led 即可获取led_status的值,返回格式是: name:led,type:uint8,value:led_status
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