284 lines
7.3 KiB
C
284 lines
7.3 KiB
C
/***************************************************************
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*Copyright (C), 2017, Shanghai Eastsoft Microelectronics Co., Ltd
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*文件名： lib_printf.c
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*作 者： Liut
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*版 本： V1.00
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*日 期： 2017/07/14
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*描 述： 串口打印库函数
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*备 注： 适用于 ES8P508x芯片
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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。
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***************************************************************/
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#include "lib_printf.h"
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#include <stdarg.h>
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/***************************************************************
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函数名：fputc
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描 述：重定向c库函数printf到UART
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输入值：。。。
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输出值：。。。
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返回值：。。。
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***************************************************************/
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/*使用printf()函数需要调用微库：Use MicroLIB*/
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int fputc(int ch, FILE *f)
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{
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FlagStatus Status = RESET;
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uint32_t Count=0;
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#if defined __PRINTF_USE_UART3__
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UART_SendByte(UART3, (unsigned char) ch);
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do
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{
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Status = UART_GetFlagStatus(UART3,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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return (EOF);
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#elif defined __PRINTF_USE_UART2__
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UART_SendByte(UART2, (unsigned char) ch);
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do
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{
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Status = UART_GetFlagStatus(UART2,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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return (EOF);
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#elif defined __PRINTF_USE_UART1__
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UART_SendByte(UART1, (unsigned char) ch);
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do
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{
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Status = UART_GetFlagStatus(UART1,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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return (EOF);
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#else
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UART_SendByte(UART0, (unsigned char) ch);
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do
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{
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Status = UART_GetFlagStatus(UART0,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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return (EOF);
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#endif
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return (ch);
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}
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#ifdef __clang__ //当使用的是idesigner编译器时，则不调用微库
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/***************************************************************
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描 述：将整形数据转换成字符串
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输入值： -radix =10 表示10进制，其他结果为0
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* -value 要转换的整形数
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* -buf 转换后的字符串
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* -radix = 10
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返回值：无
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***************************************************************/
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static char *itoa(int value, char *string, int radix)
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{
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int i, d;
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int flag = 0;
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char *ptr = string;
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/* This implementation only works for decimal numbers. */
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if (radix != 10)
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{
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*ptr = 0;
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return string;
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}
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if (!value)
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{
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*ptr++ = 0x30;
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*ptr = 0;
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return string;
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}
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/* if this is a negative value insert the minus sign. */
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if (value < 0)
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{
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*ptr++ = '-';
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/* Make the value positive. */
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value *= -1;
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}
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for (i = 10000; i > 0; i /= 10)
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{
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d = value / i;
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if (d || flag)
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{
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*ptr++ = (char)(d + 0x30);
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value -= (d * i);
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flag = 1;
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}
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}
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/* Null terminate the string. */
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*ptr = 0;
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return string;
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}
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/***************************************************************
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描 述：格式化输出，类似于C库中的printf，但这里没有用到C库
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输入值： -UARTx 串口通道，
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* -Data 要发送到串口的内容的指针
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* -... 其他参数
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返回值：无
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典型应用： UART_printf("\r\n this is a demo \r\n" );
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* UART1_printf("\r\n %d \r\n", i );
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* UART1_printf("\r\n %s \r\n", j );
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***************************************************************/
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/* 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，
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只支持\r \n %d %s */
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ErrorStatus UART_printf(uint8_t *Data,...)
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{
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UART_TypeDef *UARTx;
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const char *s;
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int d;
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char buf[16];
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ErrorStatus RET = SUCCESS;
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FlagStatus Status = RESET;
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uint32_t Count=0;
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va_list ap;
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/**
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**
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**使用宏定义选择使用哪一个串口
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**
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***/
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#if defined __PRINTF_USE_UART3__
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UARTx = UART3;
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#elif defined __PRINTF_USE_UART2__
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UARTx = UART2;
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#elif defined __PRINTF_USE_UART1__
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UARTx = UART1;
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#else
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UARTx = UART0;
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#endif
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va_start(ap, Data);
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while ( *Data != 0) // 判断是否到达字符串结束符
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{
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if ( *Data == 0x5c ) //'\'
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{
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switch ( *++Data )
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{
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case 'r': //回车符
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Count=0;
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UART_SendByte(UARTx, 0x0d);
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do
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{
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Status = UART_GetFlagStatus(UARTx,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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RET = ERROR;
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Data ++;
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break;
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case 'n': //换行符
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Count=0;
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UART_SendByte(UARTx, 0x0a);
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do
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{
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Status = UART_GetFlagStatus(UARTx,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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RET = ERROR;
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Data ++;
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break;
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default:
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Data ++;
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break;
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}
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}
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else if ( *Data == '%')
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{
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switch ( *++Data )
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{
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case 's': //字符串
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s = va_arg(ap, const char *);
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for ( ; *s; s++)
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{
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Count=0;
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UART_SendByte(UARTx,*s);
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do
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{
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Status = UART_GetFlagStatus(UARTx,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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RET = ERROR;
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}
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Data++;
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break;
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case 'd': //十进制
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d = va_arg(ap, int);
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itoa(d, buf, 10);
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for (s = buf; *s; s++)
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{
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Count=0;
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UART_SendByte(UARTx,*s);
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do
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{
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Status = UART_GetFlagStatus(UARTx,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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RET = ERROR;
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}
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Data++;
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break;
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default:
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Data++;
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break;
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}
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} /* end of else if */
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else
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{
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Count=0;
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UART_SendByte(UARTx, *Data++);
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do
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{
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Status = UART_GetFlagStatus(UARTx,UART_FLAG_TXIDLE);
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Count++;
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}while((Status == RESET)&&(Count != 0x1CE2));
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if(Count == 0x1CE2)
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RET = ERROR;
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}
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}
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return RET;
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}
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#endif
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/*************************END OF FILE**********************/
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