嵌入式

2440，嵌入式linux平台12864驱动（调试完成）

2019-07-12 23:26发布

站内文章 / 嵌入式Linux
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其实一早就做完了，不过前一个版本有些显示不准确，现在在好些地方加上延时，终于搞定了！！！
源码奉上： lcd12864.h /************************************* NAME:lcd12864.h AUTHOR:vtk321 *************************************/ #ifndef lcd12864_H #define lcd12864_H #define lcd12864_MAJOR 244 #define DEVICE_NAME "lcd12864" #define lcd12864_DATA_0 S3C2410_GPF1 //定义并行数据IO口 #define lcd12864_DATA_1 S3C2410_GPF3 #define lcd12864_DATA_2 S3C2410_GPF4 #define lcd12864_DATA_3 S3C2410_GPF5 #define lcd12864_DATA_4 S3C2410_GPF6 #define lcd12864_DATA_5 S3C2410_GPF7 #define lcd12864_DATA_6 S3C2410_GPG0 #define lcd12864_DATA_7 S3C2410_GPG3 #define lcd12864_DATA_CFG0_OUTP S3C2410_GPF1_OUTP #define lcd12864_DATA_CFG1_OUTP S3C2410_GPF3_OUTP #define lcd12864_DATA_CFG2_OUTP S3C2410_GPF4_OUTP #define lcd12864_DATA_CFG3_OUTP S3C2410_GPF5_OUTP #define lcd12864_DATA_CFG4_OUTP S3C2410_GPF6_OUTP #define lcd12864_DATA_CFG5_OUTP S3C2410_GPF7_OUTP #define lcd12864_DATA_CFG6_OUTP S3C2410_GPG0_OUTP #define lcd12864_DATA_CFG7_OUTP S3C2410_GPG3_OUTP #define lcd12864_DATA_CFG7_INP S3C2410_GPG3_INP #define lcd12864_E S3C2410_GPG5 //使能控制 #define lcd12864_RW S3C2410_GPG6 //读写控制 #define lcd12864_RS S3C2410_GPG7 //RS=“H”表示DB7~DB0 为显示数据 RS=“L”表示DB7~DB0为控制指令 #define lcd12864_RST S3C2410_GPG9 //复位 #define lcd12864_E_CFG_OUTP S3C2410_GPG5_OUTP #define lcd12864_RW_CFG_OUTP S3C2410_GPG6_OUTP #define lcd12864_RS_CFG_OUTP S3C2410_GPG7_OUTP #define lcd12864_RST_CFG_OUTP S3C2410_GPG9_OUTP #endif //lcd12864_H
gt2440_12864.c
#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "lcd12864.h" #define lcd12864_E_cfg s3c2410_gpio_cfgpin(lcd12864_E, lcd12864_E_CFG_OUTP) #define lcd12864_RW_cfg s3c2410_gpio_cfgpin(lcd12864_RW, lcd12864_RW_CFG_OUTP) #define lcd12864_RS_cfg s3c2410_gpio_cfgpin(lcd12864_RS, lcd12864_RS_CFG_OUTP) #define lcd12864_RST_cfg s3c2410_gpio_cfgpin(lcd12864_RST, lcd12864_RST_CFG_OUTP) #define lcd12864_E_H s3c2410_gpio_setpin(lcd12864_E, 1) #define lcd12864_E_L s3c2410_gpio_setpin(lcd12864_E, 0) #define lcd12864_RW_H s3c2410_gpio_setpin(lcd12864_RW, 1) #define lcd12864_RW_L s3c2410_gpio_setpin(lcd12864_RW, 0) #define lcd12864_RS_H s3c2410_gpio_setpin(lcd12864_RS, 1) #define lcd12864_RS_L s3c2410_gpio_setpin(lcd12864_RS, 0) #define lcd12864_RST_H s3c2410_gpio_setpin(lcd12864_RST, 1) #define lcd12864_RST_L s3c2410_gpio_setpin(lcd12864_RST, 0) #define BUSY_SET s3c2410_gpio_cfgpin(lcd12864_DATA_7,lcd12864_DATA_CFG7_INP) #define BUSY_RESET s3c2410_gpio_cfgpin(lcd12864_DATA_7,lcd12864_DATA_CFG7_OUTP) #define BUSY_STU s3c2410_gpio_getpin(lcd12864_DATA_7) #define BUSY_H s3c2410_gpio_setpin(lcd12864_DATA_7,1) static unsigned long lcd12864_data_table[]={ lcd12864_DATA_0, lcd12864_DATA_1, lcd12864_DATA_2, lcd12864_DATA_3, lcd12864_DATA_4, lcd12864_DATA_5, lcd12864_DATA_6, lcd12864_DATA_7, }; static unsigned int lcd12864_data_cfg_table[]= { lcd12864_DATA_CFG0_OUTP, lcd12864_DATA_CFG1_OUTP, lcd12864_DATA_CFG2_OUTP, lcd12864_DATA_CFG3_OUTP, lcd12864_DATA_CFG4_OUTP, lcd12864_DATA_CFG5_OUTP, lcd12864_DATA_CFG6_OUTP, lcd12864_DATA_CFG7_OUTP, }; static void lcd12864_pin_init(void) //初始化引脚 { int i; for (i = 0;i < 8;i++) { s3c2410_gpio_cfgpin(lcd12864_data_table[i], lcd12864_data_cfg_table[i]); s3c2410_gpio_setpin(lcd12864_data_table[i], 0); } lcd12864_E_cfg; lcd12864_RW_cfg; lcd12864_RS_cfg; //lcd12864_RST_cfg; lcd12864_E_L; lcd12864_RW_L; lcd12864_RS_L; //lcd12864_RST_L; } /************* 复位 ************* static void reset(void) { s3c2410_gpio_setpin(lcd12864_RST, 0); mdelay(21); s3c2410_gpio_setpin(lcd12864_RST, 1); mdelay(21); }*/ /*************** 判LCD忙函数 ***************/ static void lcd_busy(void) { mdelay(20); //适当加入延时 lcd12864_E_L; BUSY_H; BUSY_SET; lcd12864_RS_L; lcd12864_RW_H; while(1) { lcd12864_E_H; mdelay(5); if(!BUSY_STU)break; lcd12864_E_L; } lcd12864_E_L; BUSY_RESET; } /*************** 写入指令 *****************/ static void lcd12864_w_cmd(unsigned char cmd) { int i; unsigned char ccmd = cmd; lcd_busy(); lcd12864_RS_L; lcd12864_RW_L; lcd12864_E_L; mdelay(10); //适当加入延时 for(i=0;i<8;i++) { if(ccmd & 0x01) { s3c2410_gpio_setpin(lcd12864_data_table[i],1); } else { s3c2410_gpio_setpin(lcd12864_data_table[i],0); } ccmd = ccmd>>1; } mdelay(10); //适当加入延时 lcd12864_E_H; mdelay(20); lcd12864_E_L; } /*************** 写入字符数据 *****************/ static void lcd12864_w_data(unsigned char data) { int ii; unsigned char cdata = data; lcd_busy(); lcd12864_RS_H; lcd12864_RW_L; lcd12864_E_L; mdelay(10); //适当加入延时 for(ii=0;ii<8;ii++) { if(cdata & 0x01) { s3c2410_gpio_setpin(lcd12864_data_table[ii], 1); } else { s3c2410_gpio_setpin(lcd12864_data_table[ii], 0); } cdata = cdata>>1; } mdelay(10); //适当加入延时 lcd12864_E_H; mdelay(20); lcd12864_E_L; } /*************** 设定显示位置 ****************/ static void lcd12864_position(unsigned char x, unsigned char y) { unsigned char pos; if(x == 0) x = 0x80; if(x == 1) x = 0x90; if(x == 2) x = 0x98; if(x == 3) x = 0x88; pos = x + y; lcd12864_w_cmd(pos); //光标移至该地址,并从该地址起显示 } /*************** lcd12864显示字符数据 ****************/ static void lcd12864_display(char* data) { int i = 0; /*unsigned char dis_char[30]; dis_char = data1; for(;*data1 != '

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