dc32-retro-tech-addon/firmware/retro_tech_fw/user/src/config.c

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/*
* config.c
*
* Created on: Jul 27, 2024
* Author: true
*/
#include "config.h"
#include "eeprom.h"
struct UserConf userconf;
static uint16_t checksum()
{
uint16_t i;
uint16_t sum = 0;
uint8_t *uc = (uint8_t *)&userconf;
// calculate checksum
for (i = 0; i < sizeof(userconf) - 6; i++) {
sum += *uc++;
}
return sum;
}
void userconf_load()
{
uint8_t csum;
eeprom_read_bytes(0, 0, (uint8_t *)&userconf, sizeof(userconf));
csum = checksum();
if ((userconf.checkval != CHECKVAL) || (userconf.checksum != csum)) {
// config is invalid; reset to default
userconf.cursor_color = CONF_CURSOR_WHITE;
userconf.cursor_flash = 4; // default flash rate
userconf.ledprog_ena_mask = 0; // no programs enabled
userconf.ledprog_setting[0][0] = 2; // rainbow: angle top left to bottom right
userconf.ledprog_setting[0][1] = 25; // rainbow: spacing
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userconf.ledprog_setting[1][0] = 8; // lite then fade: fade rate
userconf.ledprog_setting[1][1] = 192; // lite then fade: hue
userconf.ledprog_setting[2][0] = 255; // twinkle: saturation
userconf.ledprog_setting[2][1] = 4; // twinkle: intensity
userconf.ledprog_setting[3][0] = 5; // alternate: offset in 22.5deg increments
userconf.ledprog_setting[3][1] = 244; // alternate: hue
userconf.checksum = checksum();
userconf.checkval = CHECKVAL;
}
}
void userconf_save()
{
userconf.checksum = checksum();
userconf.checkval = CHECKVAL;
// this eeprom writes in 16-byte pages only, so split up the data
eeprom_write_bytes(0, 0x00, (uint8_t *)&userconf + 0x00, 16);
eeprom_write_bytes(0, 0x10, (uint8_t *)&userconf + 0x10, 16);
}