94 lines
1.6 KiB
C
94 lines
1.6 KiB
C
|
/*
|
||
|
|
* lcd_emulator.c
|
||
|
|
*
|
||
|
|
* Created on: Apr 1, 2019
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "lcd.h"
|
||
|
|
|
||
|
|
#define CR 13 // \r
|
||
|
|
#define TAB 9 // \n
|
||
|
|
|
||
|
|
static int lcd_row, lcd_col;
|
||
|
|
static char lcd_buf[MAX_ROWS][MAX_CHARS_PER_LINE];
|
||
|
|
|
||
|
|
void LCD_Open(void){
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
void LCD_Clear(void){
|
||
|
|
lcd_row=0;
|
||
|
|
lcd_col=0;
|
||
|
|
for (int i = 0; i < MAX_ROWS; i++){
|
||
|
|
for (int j = 0; j < MAX_CHARS_PER_LINE; j++){
|
||
|
|
lcd_buf[i][j] = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void LCD_GoTo(unsigned int row, unsigned int col){
|
||
|
|
if (row < MAX_ROWS && col < MAX_CHARS_PER_LINE){
|
||
|
|
lcd_row = row;
|
||
|
|
lcd_col = col;
|
||
|
|
} else {
|
||
|
|
printf("LCD_GoTo(%u, %u) out of range\n", lcd_row, lcd_col);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void to_row(unsigned char row_to){
|
||
|
|
if (row_to == 0){
|
||
|
|
lcd_row = 0;
|
||
|
|
} else {
|
||
|
|
lcd_row = 1;
|
||
|
|
}
|
||
|
|
lcd_col = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LCD_OutString(const char *string, uint8_t max_chars) {
|
||
|
|
const char *s;
|
||
|
|
for (s = string; *s && max_chars > 0; s++, max_chars--) {
|
||
|
|
TERMIO_PutChar(*s);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
short TERMIO_PutChar(unsigned char letter) {
|
||
|
|
if (letter == CR || letter == '\n') {
|
||
|
|
LCD_Clear();
|
||
|
|
} else if (letter == TAB || letter == '\t') {
|
||
|
|
if (lcd_row == 0) {
|
||
|
|
to_row(1);
|
||
|
|
} else {
|
||
|
|
to_row(0);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
lcd_buf[lcd_row][lcd_col] = letter;
|
||
|
|
lcd_col++;
|
||
|
|
if (lcd_col > MAX_CHARS_PER_LINE) {
|
||
|
|
if (lcd_row == 0) {
|
||
|
|
to_row(1);
|
||
|
|
} else {
|
||
|
|
to_row(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LCD_ClearToEnd(uint8_t curr_row){
|
||
|
|
while (lcd_col != 0 && lcd_row == curr_row){
|
||
|
|
TERMIO_PutChar(' ');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void LCD_OutNibble(uint8_t x){
|
||
|
|
x &= 0xf; //ensure only bottom nibble
|
||
|
|
if (x <= 9){
|
||
|
|
TERMIO_PutChar(x + '0');
|
||
|
|
} else {
|
||
|
|
TERMIO_PutChar(x - 10 + 'a');
|
||
|
|
}
|
||
|
|
}
|