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https://opencores.org/ocsvn/mips789/mips789/trunk
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[/] [mips789/] [tags/] [arelease/] [Clib/] [dvc_lib.c] - Rev 36
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/****************************************************************** * * * Author: Liwei * * * * This file is part of the "mips789" project. * * Downloaded from: * * http://www.opencores.org/pdownloads.cgi/list/mips789 * * * * If you encountered any problem, please contact me via * * Email:mcupro@opencores.org or mcupro@163.com * * * ******************************************************************/ #include "dvc_lib.h" void __inline dis_byte(unsigned char data) { SEG7LED=data ; } void dly_us(unsigned int us) { int i ; while(us--) { i=FRQ/1000000/3-2 ; while(i--); //delay 1us } } void dly_ms(unsigned int ms) { int i ,us=1000*ms; while(us--) { i=12; while(i--); } } void uart0_putc(unsigned char data) { while((STATUS&(1<<2))!=0); UART0_DATA=data ; } unsigned char uart0_getc(void) { unsigned char ret=0 ; while((STATUS&(1<<3))==0); ret=UART0_DATA ; set_bit(CMD,1); set_bit(CMD,1); clr_bit(CMD,1); return ret ; } unsigned char enqire_rxd(void) { return(STATUS&(1<<3))?1:0 ; } void uart0_putstr(char*str) { while(1){ if(*str=='\0')return ; else if(*str=='\n') { uart0_putc('\r'); uart0_putc(*str++); } else uart0_putc(*str++); } } void __inline led1_on(void) { CMD=CMD&(~(1<<5)); } void __inline led1_off(void) { CMD=CMD|(1<<5); } void __inline led2_on(void) { CMD=CMD&(~(1<<6)); } void __inline led2_off(void) { CMD=CMD|(1<<6); } //lcd part void LCD_init(void) { char i=3 ; CLEARSCREEN ; //clear screen while(i--) { LCD_en_command(DATA_MODE); //set 8 bit data transmission mode dly_us(LCD_INIT_US); } LCD_en_command(OPEN_SCREEN); //open display (enable lcd display) dly_us(LCD_DLY_US); LCD_en_command(DISPLAY_ADDRESS); //set lcd first display address dly_us(LCD_DLY_US); CLEARSCREEN ; //clear screen dly_us(LCD_DLY_US); } void LCD_en_command(unsigned char command) { LCDDATA=command ; clr_bit(CMD,2); // LCD1602_RS=LOW; clr_bit(CMD,3); //LCD1602_RW=LOW; clr_bit(CMD,4); //LCD1602_EN=LOW; dly_us(LCD_DLY_US); set_bit(CMD,4); //LCD1602_EN=HIGH; } void LCD_en_dat(unsigned char dat) { LCDDATA=dat ; set_bit(CMD,2); //LCD1602_RS=HIGH; clr_bit(CMD,3); //LCD1602_RW=LOW; clr_bit(CMD,4); //LCD1602_EN=LOW; dly_us(LCD_DLY_US); set_bit(CMD,4); //LCD1602_EN=HIGH; } void LCD_set_xy(unsigned char x,unsigned char y) { unsigned char address ; if(y==LINE1) address=LINE1_HEAD+x ; else address=LINE2_HEAD+x ; LCD_en_command(address); } void LCD_write_char(unsigned x,unsigned char y,unsigned char dat) { LCD_set_xy(x,y); LCD_en_dat(dat); } void LCD_write_string(unsigned char X,unsigned char Y,unsigned char*s) { LCD_set_xy(X,Y); while(*s) { LCD_en_dat(*s++); } } void download() { unsigned char*addr=(void*)0 ; uart0_putstr((char*)"This is MIPS789 BOOTLOADER\n"); dis_byte(0xcc); //attenions please'!' while(uart0_getc()!='!'); uart0_putc((unsigned char)('O')); //'O'k .i am ready while(1) { *addr=(unsigned char)uart0_getc(); dis_byte((unsigned char)(*addr++)); } } void tmr_en(unsigned int cntr) { set_bit(CMD,8); TMR_DATA=cntr ; tmr_clr(); } void tmr_disen(void) { clr_bit(CMD,8); clr_bit(CMD,7); } void tmr_clr(void) { set_bit(CMD,7); set_bit(CMD,7); clr_bit(CMD,7); clr_bit(CMD,7); } unsigned int read_tmr() { return TMR_DATA ; } unsigned char get_key1() { return(STATUS&1)?0:1 ; } unsigned char get_key2() { return(STATUS&(1<<1))?0:1 ; }
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