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