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Implement contrast and backlight handling

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The default values for the contrast and backlight are set when writing
to eeprom. Use the values stored in eeprom for contrast and
backlight. Update the contrast and backlight when changing their
values.
This commit is contained in:
finga 2021-09-12 00:59:22 +02:00
parent 05c9888a75
commit d75d230541
1 changed files with 44 additions and 12 deletions
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56
firmware/src/main.c
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@ -16,8 +16,8 @@
#define ENC_A (PINB & (1 << PB6))
#define ENC_B (PINB & (1 << PB7))
uint8_t EEMEM eeprom_contrast = 0;
uint8_t EEMEM eeprom_backlight = 0;
uint8_t EEMEM eeprom_contrast = 8;
uint8_t EEMEM eeprom_backlight = 1;
static const uint8_t sacred_chao[200] = { 0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF0, 0xF8, 0xFC, 0xFC, 0xFE, 0xFE, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xFE, 0xFE, 0xFC, 0xFC, 0xF8, 0xF0, 0xF0, 0xE0, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00,
0x80, 0xF0, 0xFC, 0xFE, 0xFF, 0xFF, 0x7F, 0x3F, 0x1F, 0x3F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0x0F, 0x0F, 0x07, 0x07, 0x07, 0x03, 0xC3, 0xE3, 0x73, 0x37, 0x17, 0x07, 0x0F, 0x1E, 0x3C, 0xF0, 0x80,
@ -137,10 +137,29 @@ void lcd_init(void) {
lcd_write(0x2F); // (5) Set Power Control: Booster, Regulator and Follower on
lcd_write(0x27); // (8) Set VLCD Resistor Ratio: Set Contrast
lcd_write(0x81); // (9) Set Electronic Volume: Set Contrast
lcd_write(0x10); // (9) Set Electronic Volume: Set Contrast
lcd_write(value_contrast); // (9) Set Electronic Volume: Set Contrast
lcd_write(0xAF); // (12) Set Display Enable: Display on
}
void lcd_update_contrast(void) {
SPI_PORT &= ~(1 << LCD_CD);
lcd_write(0x81); // (9) Set Electronic Volume: Set Contrast
lcd_write(value_contrast); // (9) Set Electronic Volume: Set Contrast
SPI_PORT |= (1 << LCD_CD);
}
void lcd_update_backlight(void) {
switch (value_backlight) {
case 0:
DDRD &= (0 << PD5);
break;
default:
DDRD |= (1 << PD5);
OCR0B = value_backlight - 1;
break;
}
}
void lcd_fill(uint8_t data) {
for (uint8_t i = 0; i < 8; i++) {
SPI_PORT &= ~(1 << LCD_CD);
@ -517,10 +536,16 @@ static void update_setup(enum input event) {
setup_state = contrast;
break;
case change_contrast:
value_contrast++;
if (value_contrast < 63) {
value_contrast++;
lcd_update_contrast();
}
break;
case change_backlight:
value_backlight++;
if (value_backlight < 100) {
value_backlight++;
lcd_update_backlight();
}
break;
}
lcd_setup();
@ -535,10 +560,16 @@ static void update_setup(enum input event) {
setup_state = back;
break;
case change_contrast:
value_contrast--;
if (value_contrast > 0) {
value_contrast--;
lcd_update_contrast();
}
break;
case change_backlight:
value_backlight--;
if (value_backlight > 0) {
value_backlight--;
lcd_update_backlight();
}
break;
}
lcd_setup();
@ -578,11 +609,13 @@ static void update_setup(enum input event) {
case change_contrast:
setup_state = contrast;
value_contrast = eeprom_read_byte(&eeprom_contrast);
lcd_update_contrast();
lcd_setup();
break;
case change_backlight:
setup_state = backlight;
value_backlight = eeprom_read_byte(&eeprom_backlight);
lcd_update_backlight();
lcd_setup();
break;
}
@ -688,13 +721,12 @@ int main(void) {
value_contrast = eeprom_read_byte(&eeprom_contrast);
value_backlight = eeprom_read_byte(&eeprom_backlight);
// FastPWM: 1.25kHz
// Init backlight: FastPWM: 1.25kHz
// TODO: Try to get the backlit even more dim
TCCR0A = (1 << WGM01) | (1 << WGM00) | (1 << COM0B1);
TCCR0B = (1 << CS01) | (1 << WGM02); // prescaler = 8;
TCCR0A |= (1 << WGM01) | (1 << WGM00) | (1 << COM0B1);
TCCR0B |= (1 << CS01) | (1 << WGM02); // prescaler = 8;
OCR0A = 100;
OCR0B = 0;
DDRD |= (1 << PD5);
lcd_update_backlight();
// SPI setup
spi_init();