电源

【单片机】用iic做电池充放电

2019-07-14 03:46发布

站内文章 / 电源技术
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iic.c
#include #include "./lcd/lcd.h" #include "./delay/delay.h" sbit SCL = P2^2; sbit SDA = P2^3; bit ack; /* ================ 功能：起始信号 ================ */ void iic_start() { SDA = 1; SCL = 1; delay_us(1); SDA = 0; delay_us(1); SCL = 0; } /* ================ 功能：终止信号 ================ */ void iic_stop() { SDA = 0; SCL = 1; delay_us(1); SDA = 1; delay_us(1); SCL = 0; } /* ==================== 功能：发送一个字节 ==================== */ bit iic_send_byte(unsigned char byte) { unsigned char i; for(i = 0; i < 8; i++) { SDA = byte & 0x80; SCL = 1; delay_us(1); SCL = 0; byte <<= 1; } SCL = 1; SDA = 1; delay_us(1); if(0 == SDA) { ack = 1; } else { ack = 0; } SCL = 0; return ack; } /* ==================== 功能：接收一个字节 ==================== */ unsigned char iic_receive_byte() { unsigned char i; unsigned char a; unsigned char temp = 0; SDA = 1; for(i = 0; i < 8; i++) { SCL = 0; delay_us(1); SCL = 1; if(SDA) { a = 1; } else { a = 0; } temp |= (a << (7 - i)); delay_us(1); } SCL = 0; return temp; } #if 0 /* ==================== 功能：应答 ==================== */ void iic_ack() { SDA = 0; SCL = 1; delay_us(1); SCL = 0; } #endif /* ==================== 功能：无应答 ==================== */ void iic_noack() { SDA = 1; SCL = 1; delay_us(1); SCL = 0; } #if 0 /* ==================== 功能：发送字符串 ==================== */ bit iic_send_str(unsigned char sla, unsigned char suba, unsigned char *str, unsigned char len) { unsigned char i; iic_start(); iic_send_byte(sla); if(0 == ack) { return 0; } iic_send_byte(suba); if(0 == ack) { return 0; } for(i = 0; i < len; i++) { iic_send_byte(*str); delay_us(1); if(0 == ack) { return 0; } str++; } iic_stop(); return 1; } /* ==================== 功能：接收字符串 ==================== */ bit iic_receive_str(unsigned char sla, unsigned char suba, unsigned char *str, unsigned char len) { unsigned char i; iic_start(); iic_send_byte(sla); if(0 == ack) { return 0; } iic_send_byte(suba); if(0 == ack) { return 0; } iic_start(); iic_send_byte(sla + 1); if(0 == ack) { return 0; } for(i = 0; i < len - 1; i++) { *str = iic_receive_byte(); iic_ack(); str++; } *str = iic_receive_byte(); iic_noack(); iic_stop(); return 1; } #endif unsigned char AD_read() { unsigned char temp; iic_start(); iic_send_byte(0x90); if(0 == ack) { return 0; } iic_send_byte(0x40); //设置通道和工作方式 if(0 == ack) { return 0; } iic_start(); iic_send_byte(0x90 + 1); if(0 == ack) { return 0; } temp = iic_receive_byte(); iic_noack(); iic_stop(); return temp; } void main() { unsigned char test; unsigned char n; float per; float number; lcd_init(); while(1) { test = AD_read(); delay_ms(20); number = (float)test / 255 * 5; n = (float)test / 255 * 7; per = (float)test * 100 / 255; lcd_dis_power(n); lcd_write_byte(1,3,(unsigned char)(number) % 10 + 0x30); lcd_write_byte(1,4,'.'); lcd_write_byte(1,5,(unsigned char)(number * 10) % 10 + 0x30); lcd_write_byte(1,6,(int)(number * 100) % 10 + 0x30); lcd_write_byte(2,1,(unsigned char)(per) / 100 + 0x30); lcd_write_byte(2,2,(unsigned char)(per) % 100 / 10 + 0x30); lcd_write_byte(2,3,(unsigned char)(per) % 10 + 0x30); lcd_write_byte(2,4,'%'); delay_ms(5); } }
lcd.c #include #include "../delay/delay.h" #include "lcd.h" unsigned char disdata[7][8] = { 0x0e,0x1b,0x11,0x11,0x11,0x11,0x11,0x1f, 0x0e,0x1b,0x11,0x11,0x11,0x11,0x1f,0x1f, 0x0e,0x1b,0x11,0x11,0x11,0x1f,0x1f,0x1f, 0x0e,0x1b,0x11,0x11,0x1f,0x1f,0x1f,0x1f, 0x0e,0x1b,0x11,0x1f,0x1f,0x1f,0x1f,0x1f, 0x0e,0x1b,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f, 0x0e,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f, }; void lcd_write(unsigned char byte, unsigned char flag) { if(flag) { RS = 1; } else { RS = 0; } RW = 0; E = 1; LCDPORT = byte; delay_us(5); E = 0; } void lcd_init() { delay_ms(15); lcd_write(0x38,LCD_WRITE_COM); delay_ms(5); lcd_write(0x38,LCD_WRITE_COM); delay_ms(5); lcd_write(0x38,LCD_WRITE_COM); delay_ms(5); lcd_write(0x38,LCD_WRITE_COM); delay_ms(5); lcd_write(0x08,LCD_WRITE_COM); delay_ms(5); lcd_write(0x01,LCD_WRITE_COM); delay_ms(5); lcd_write(0x06,LCD_WRITE_COM); delay_ms(5); lcd_write(0x0c,LCD_WRITE_COM); delay_ms(5); } #if 0 void lcd_dis_str(unsigned char x, unsigned char y, unsigned char *disdata) { unsigned char add; if(((0 == x) || (x > 2)) || ((0 == y) || (y > 16))) { return ; } add = 0x80 + (x - 1) * 0x40 + (y - 1); lcd_write(add,LCD_WRITE_COM); while(*disdata != '