45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
#include <LPC17xx.h>
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#include <stdlib.h>
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#define RS_CTRL 0x08000000
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#define EN_CTRL 0x10000000
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#define DT_CTRL 0x07800000
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unsigned long int temp1 = 0, temp2 = 0, i, j;
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unsigned char flag1 = 0, flag2 = 0;
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unsigned char msg[] = ("Dice: ");
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void lcd_write(void);
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void port_write(void);
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void delay_lcd(unsigned long);
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unsigned long int init_command[] = {0x30,0x30,0x30,0x20,0x28,0x0C,0x01,0x80};
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int main() {
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LPC_GPIO0->FIODIR = DT_CTRL | RS_CTRL | EN_CTRL;
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for (i = 0; i < 8; i++) { temp1 = init_command[i]; flag1 = 0; lcd_write(); }
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LPC_PINCON->PINSEL3 = 0; LPC_GPIO0->FIODIR &= ~(1 << 21);
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while (1) {
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while ((LPC_GPIO0->FIOPIN & (1 << 21)) != 0);
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flag1 = 0; temp1 = 0x01; lcd_write(); temp1 = 0x80; lcd_write();
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flag1 = 1; for (i = 0; msg[i] != '\0'; i++) { temp1 = msg[i]; lcd_write(); }
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j = (rand() % 6) + 1; temp1 = '0' + j; lcd_write();
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while ((LPC_GPIO0->FIOPIN & (1 << 21)) == 0);
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}
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}
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void lcd_write(void) {
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flag2 = (flag1 == 1) ? 0 : (((temp1 == 0x30) || (temp1 == 0x20)) ? 1 : 0);
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temp2 = (temp1 & 0xF0) << 19; port_write();
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if (!flag2) { temp2 = (temp1 & 0x0F) << 23; port_write(); }
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}
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void port_write(void) {
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LPC_GPIO0->FIOPIN = temp2;
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if (flag1 == 0) LPC_GPIO0->FIOCLR = RS_CTRL; else LPC_GPIO0->FIOSET = RS_CTRL;
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LPC_GPIO0->FIOSET = EN_CTRL; delay_lcd(100); LPC_GPIO0->FIOCLR = EN_CTRL;
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delay_lcd(500000);
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}
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void delay_lcd(unsigned long r1) { unsigned long r; for (r = 0; r < r1; r++); }
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