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Subversion Repositories mips32r1

[/] [mips32r1/] [trunk/] [Software/] [demos/] [XD3_I2C/] [src/] [drivers/] [lcd.c] - Blame information for rev 2

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1 2 ayersg 
#include "lcd.h"
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static uint8_t LCD_position = 0;
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static uint8_t LCD_autoIncr = 1;
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static void LCD_incrPos(uint32_t amount)
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{
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        if (LCD_autoIncr == 0) {
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                return;
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        }
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        while (amount > 32) {
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                amount -= 32;
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        }
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        LCD_position += (uint8_t)amount;
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        if (LCD_position >= 32) {
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                LCD_position -= 32;
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        }
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}
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void LCD_clear(void)
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{
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        volatile uint32_t *LCD;
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        int i;
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        LCD = (volatile uint32_t *)LCD_ADDRESS;
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        for (i=0; i<8; i++) {
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                LCD[i] = 0x20202020;
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        }
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        LCD_position = 0;
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}
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void LCD_setPos(uint8_t position)
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{
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        LCD_position = position;
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}
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uint8_t LCD_getPos(void)
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{
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        return LCD_position;
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}
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void LCD_setAutoIncr(uint8_t incr)
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{
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        LCD_autoIncr = incr;
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}
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void LCD_printByte(uint8_t byte)
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{
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        volatile uint8_t *LCD;
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        LCD = (volatile uint8_t *)(LCD_ADDRESS + LCD_position);
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        *LCD = byte;
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        LCD_incrPos(1);
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}
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void LCD_printByteHex(uint8_t byte)
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{
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        volatile uint8_t *LCD;
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        uint8_t nibble_h, nibble_l;
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        LCD = (volatile uint8_t *)(LCD_ADDRESS + LCD_position);
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        nibble_h = byte >> 4;
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        nibble_l = byte & 0x0f;
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        if (nibble_h < 10) {
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                nibble_h += 48;
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        }
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        else {
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                nibble_h += 55;
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        }
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        if (nibble_l < 10) {
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                nibble_l += 48;
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        }
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        else {
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                nibble_h += 55;
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        }
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        *LCD = nibble_h;
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        LCD++;
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        *LCD = nibble_l;
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        LCD_incrPos(2);
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}
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void LCD_printByteDec(uint8_t byte)
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{
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        volatile uint8_t *LCD;
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        uint8_t hundreds, tens, ones;
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        uint32_t n_printed = 1;
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        LCD = (volatile uint8_t *)(LCD_ADDRESS + LCD_position);
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        hundreds = tens = ones = 48;
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        while (byte >= 100) {
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                hundreds++;
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                byte -= 100;
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        }
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        while (byte >= 10) {
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                tens++;
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                byte -= 10;
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        }
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        while (byte >= 1) {
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                ones++;
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                byte -= 1;
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        }
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        if (hundreds > 48) {
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                *LCD = hundreds;
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                LCD++;
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                n_printed++;
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        }
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        if ((n_printed > 1) || (tens > 48)) {
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                *LCD = tens;
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                LCD++;
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                n_printed++;
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        }
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        *LCD = ones;
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        LCD_incrPos(n_printed);
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}
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void LCD_printWord(uint32_t word)
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{
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        volatile uint32_t *LCD;
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        LCD = (volatile uint32_t *)(LCD_ADDRESS + LCD_position);
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        *LCD = word;
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        LCD_incrPos(4);
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}
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void LCD_printString(char *string)
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{
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        volatile char *LCD;
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        int i = 0;
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        LCD = (volatile char *)(LCD_ADDRESS + LCD_position);
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        while (string[i] != '\0') {
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                LCD[i] = string[i];
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                i++;
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        }
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        LCD_incrPos(i);
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}
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