ozone_cp/Library/Source/lib_printf.c

/*********************************************************
 *Copyright (C), 2015, Shanghai Eastsoft Microelectronics Co., Ltd.
 *文件名:  lib_printf.c
 *作  者:  AE Team
 *版  本:  V1.01
 *日  期:  2021/06/09
 *描  述:  Printf功能库函数
 *备  注:
 本软件仅供学习和演示使用，对用户直接引用代码所带来的风险或后果不承担任何法律责任。
 **********************************************************/
#include "lib_printf.h"
#include <stdarg.h>

/***************************************************************
  函数名：fputc
  描  述：重定向c库函数printf到UART
  输入值：。。。
  输出值：。。。
  返回值：。。。
 ***************************************************************/
/*使用printf()函数需要调用微库：Use MicroLIB*/
int fputc(int ch, FILE *f)
{
    uint32_t count = 0;
    FlagStatus status = RESET;

#if defined  __PRINTF_USE_UART3__
    UART_SendByte(UART3, (unsigned char) ch);

    do
    {
        status = UART_GetFlagStatus(UART3, UART_FLAG_TB);
        count++;
    }
    while ((status == RESET) && (count != 0x1CE2));

    UART_ClearITPendingBit(UART3, UART_FLAG_TC);

    if (count == 0x1CE2)
        return -1;

#elif defined __PRINTF_USE_UART2__
    UART_SendByte(UART2, (unsigned char) ch);

    do
    {
        status = UART_GetFlagStatus(UART2, UART_FLAG_TC);
        count++;
    }
    while ((status == RESET) && (count != 0x1CE2));

    UART_ClearITPendingBit(UART2, UART_FLAG_TC);

    if (count == 0x1CE2)
        return -1;

#elif defined __PRINTF_USE_UART1__
    UART_SendByte(UART1, (unsigned char) ch);

    do
    {
        status = UART_GetFlagStatus(UART1, UART_FLAG_TC);
        count++;
    }
    while ((status == RESET) && (count != 0x1CE2));

    UART_ClearITPendingBit(UART1, UART_FLAG_TC);

    if (count == 0x1CE2)
        return -1;

#else
    UART_SendByte(UART0, (unsigned char) ch);

    do
    {
        status = UART_GetFlagStatus(UART0, UART_FLAG_TC);
        count++;
    }
    while ((status == RESET) && (count != 0x1CE2));

    UART_ClearITPendingBit(UART0, UART_FLAG_TC);

    if (count == 0x1CE2)
        return -1;

#endif
    return (ch);
}


#ifdef __clang__     /* 当使用的是idesigner编译器时，则不调用微库 */
/***************************************************************
  函数名：itoa
  描  述：将整形数据转换成字符串
  输入值：radix =10 表示10进制，其他结果为0
  value 要转换的整形数
  buf 转换后的字符串
  radix = 10
  返回值：无
 ***************************************************************/
static char *itoa(int value, char *string, int radix)
{
    int i, d;
    int flag = 0;
    char *ptr = string;

    /* This implementation only works for decimal numbers. */
    if (radix != 10)
    {
        *ptr = 0;
        return string;
    }

    if (!value)
    {
        *ptr++ = 0x30;
        *ptr = 0;
        return string;
    }

    /* if this is a negative value insert the minus sign. */
    if (value < 0)
    {
        *ptr++ = '-';

        /* Make the value positive. */
        value *= -1;
    }

    for (i = 10000; i > 0; i /= 10)
    {
        d = value / i;

        if (d || flag)
        {
            *ptr++ = (char)(d + 0x30);
            value -= (d * i);
            flag = 1;
        }
    }

    /* Null terminate the string. */
    *ptr = 0;

    return string;
}

/***************************************************************
  描  述：  当使用idesigner时调用，格式化输出，类似于C库中的printf，但这里没有用到C库
  输入值：  UARTx 串口通道，
  Data   要发送到串口的内容的指针
  ...    其他参数
  返回值：  无
  典型应用：UART_printf("\r\n this is a demo \r\n" );
  UART_printf( "\r\n %d \r\n", i );
  UART_printf( "\r\n %s \r\n", j );
 ***************************************************************/
/* 未调用C库的时候可以使用此函数代替C库中的printf，但功能无printf全，
   只支持\r  \n  %d   %s */
ErrorStatus UART_printf(uint8_t *Data, ...)
{
    UART_TypeDef *UARTx;
    const char *s;
    int d;
    char buf[16];

    uint32_t Count = 0;
    ErrorStatus RET = SUCCESS;
    FlagStatus Status = RESET;
    va_list ap;

    /**
      **
      **使用宏定义选择使用哪一个串口
      **
    ***/
#if defined  __PRINTF_USE_UART3__

    UARTx = UART3;

#elif defined __PRINTF_USE_UART2__

    UARTx = UART2;

#elif defined __PRINTF_USE_UART1__

    UARTx = UART1;

#else

    UARTx = UART0;

#endif

    va_start(ap, Data);

    while (*Data != 0)                      /* 判断是否到达字符串结束符 */
    {
        if (*Data == 0x5c)                    /* '\' */
        {
            switch (*++Data)
            {
                case 'r':                         /* 回车符 */
                    Count = 0;
                    UART_SendByte(UARTx, 0x0d);

                    do
                    {
                        Status = UART_GetFlagStatus(UARTx, UART_FLAG_TB);
                        Count++;
                    }
                    while ((Status == RESET) && (Count != 0x1CE2));

                    if (Count == 0x1CE2)
                        RET = ERROR;

                    ++Data;
                    break;

                case 'n':                         /* 换行符 */
                    Count = 0;
                    UART_SendByte(UARTx, 0x0a);

                    do
                    {
                        Status = UART_GetFlagStatus(UARTx, UART_FLAG_TB);
                        Count++;
                    }
                    while ((Status == RESET) && (Count != 0x1CE2));

                    if (Count == 0x1CE2)
                        RET = ERROR;

                    ++Data;
                    break;

                default:
                    ++Data;
                    break;
            }
        }
        else if (*Data == '%')
        {
            switch (*++Data)
            {
                case 's':                         /* 字符串 */
                    s = va_arg(ap, const char *);

                    for (; *s; s++)
                    {
                        Count = 0;
                        UART_SendByte(UARTx, *s);

                        do
                        {
                            Status = UART_GetFlagStatus(UARTx, UART_FLAG_TB);
                            Count++;
                        }
                        while ((Status == RESET) && (Count != 0x1CE2));

                        if (Count == 0x1CE2)
                            RET = ERROR;
                    }

                    ++Data;
                    break;

                case 'd':                         /* 十进制 */
                    d = va_arg(ap, int);
                    itoa(d, buf, 10);

                    for (s = buf; *s; s++)
                    {
                        Count = 0;
                        UART_SendByte(UARTx, *s);

                        do
                        {
                            Status = UART_GetFlagStatus(UARTx, UART_FLAG_TB);
                            Count++;
                        }
                        while ((Status == RESET) && (Count != 0x1CE2));

                        if (Count == 0x1CE2)
                            RET = ERROR;
                    }

                    ++Data;
                    break;

                default:
                    ++Data;
                    break;
            }
        }
        else
        {
            Count = 0;
            UART_SendByte(UARTx, *Data++);

            do
            {
                Status = UART_GetFlagStatus(UARTx, UART_FLAG_TB);
                Count++;
            }
            while ((Status == RESET) && (Count != 0x1CE2));

            if (Count == 0x1CE2)
                RET = ERROR;
        }
    }

    return RET;
}


#endif