基于STM32读取HMC5883电子罗盘数据

#include "nokia_5110.h" #include "ascii_8x6.h" void delay_1us(void) //1us延时函数 { unsigned char a,b; for(b=3;b>0;b--) for(a=10;a>0;a--); } void delay_1ms(void) //1ms延时函数 { unsigned char a,b; for(b=233;b>0;b--) for(a=153;a>0;a--); } void delay_nms(unsigned int n) //N ms延时函数 { unsigned int i=0; for (i=0;i<n;i++) delay_1ms(); } void LCD_init(void) { // RCC->APB2ENR|=1<<0; //开启辅助时钟 // AFIO->MAPR&=0XF8FFFFFF; //清除MAPR的[26:24] // AFIO->MAPR|=1<<25; //设置jtag模式 RCC-> APB2ENR |= 1 << 2; //使能GPIOA时钟 GPIOA -> CRL &= 0xFFFF0FFF; //PA3 GPIOA -> CRL |= 0x00003000; GPIOA -> BSRR= 1 << 3; GPIOA -> CRL &= 0xFFF0FFFF; //PA4 GPIOA -> CRL |= 0x00030000; GPIOA -> BSRR= 1 << 4; GPIOA -> CRL &= 0xFF0FFFFF; //PA5 GPIOA -> CRL |= 0x00300000; GPIOA -> BSRR= 1 << 5; GPIOA -> CRL &= 0xF0FFFFFF; //PA6 GPIOA -> CRL |= 0x03000000; GPIOA -> BSRR= 1 << 6; GPIOA -> CRL &= 0x0FFFFFFF; //PA7 GPIOA -> CRL |= 0x30000000; GPIOA -> BSRR= 1 << 7; // 产生一个让LCD复位的低电平脉冲 RST_5110_0; delay_1us(); RST_5110_1; // 关闭LCD CE_5110_0; delay_1us(); // 使能LCD CE_5110_1; delay_1us(); LCD_write_byte(0x21, 0); // 使用扩展命令设置LCD模式 //LCD_write_byte(0xc8, 0); // 设置偏置电压 LCD_write_byte(0xbf, 0); // 设置偏置电压 LCD_write_byte(0x06, 0); // 温度校正 LCD_write_byte(0x13, 0); // 1:48 LCD_write_byte(0x20, 0); // 使用基本命令 LCD_clear(); // 清屏 LCD_write_byte(0x0c, 0); // 设定显示模式，正常显示 CE_5110_0; // 关闭LCD } /*----------------------------------------------------------------------- LCD_clear : LCD清屏函数 -----------------------------------------------------------------------*/ void LCD_clear(void) { unsigned int i; LCD_write_byte(0x0c, 0); LCD_write_byte(0x80, 0); for (i=0; i<504; i++) LCD_write_byte(0, 1); } /*----------------------------------------------------------------------- LCD_set_XY : 设置LCD坐标函数 输入参数： X ：0－83 Y ：0－5 -----------------------------------------------------------------------*/ void LCD_set_XY(unsigned char X, unsigned char Y) { LCD_write_byte(0x40 | Y, 0); // column LCD_write_byte(0x80 | X, 0); // row } /*----------------------------------------------------------------------- LCD_write_char : 显示英文字符 输入参数：c ：显示的字符； -----------------------------------------------------------------------*/ void LCD_write_char(unsigned char c) { unsigned char line; c -= 32; for (line=0; line<6; line++) LCD_write_byte(font6x8[c][line], 1); } /*----------------------------------------------------------------------- LCD_write_english_String : 英文字符串显示函数 输入参数：*s ：英文字符串指针； X、Y : 显示字符串的位置,x 0-83 ,y 0-5 -----------------------------------------------------------------------*/ void LCD_write_english_string(unsigned char X,unsigned char Y,char *s) { LCD_set_XY(X,Y); while (*s) { LCD_write_char(*s); s++; } } /*----------------------------------------------------------------------- LCD_draw_map : 位图绘制函数 输入参数：X、Y ：位图绘制的起始X、Y坐标； *map ：位图点阵数据； Pix_x ：位图像素（长） Pix_y ：位图像素（宽） -----------------------------------------------------------------------*/ void LCD_draw_bmp_pixel(unsigned char X,unsigned char Y,unsigned char *map, unsigned char Pix_x,unsigned char Pix_y) { unsigned int i,n; unsigned char row; if (Pix_y%8==0) row=Pix_y/8; //计算位图所占行数 else row=Pix_y/8+1; for (n=0;n<row;n++) { LCD_set_XY(X,Y); for(i=0; i<Pix_x; i++) { LCD_write_byte(map[i+n*Pix_x], 1); } Y++; //换行 } } /*----------------------------------------------------------------------- LCD_write_byte : 使用SPI接口写数据到LCD 输入参数：data ：写入的数据； command ：写数据/命令选择； -----------------------------------------------------------------------*/ void LCD_write_byte(unsigned char dat, unsigned char command) { unsigned char i; CE_5110_0; if (command == 0) DC_5110_0; // 传送命令 else DC_5110_1; // 传送数据 for(i=0;i<8;i++) { if(dat&0x80) DIN_5110_1; else DIN_5110_0; CLK_5110_0; dat = dat << 1; CLK_5110_1; } CE_5110_1; // 关闭LCD }