From d3b5533f571a74aec00733c39c2ffc2be2d939ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Wed, 22 Jun 2022 12:49:40 +0200
Subject: [PATCH] remove unused eeprom settings code

---
 main.c | 84 ----------------------------------------------------------
 1 file changed, 84 deletions(-)

diff --git a/main.c b/main.c
index 834136e..120a23b 100644
--- a/main.c
+++ b/main.c
@@ -73,90 +73,6 @@ static const uint8_t nibble_reverse_bit_order_lut[] = {
 	0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf,
 };
 
-/*
-struct settings_t {
-	uint8_t i2c_slave_addr;
-} settings;
-
-// start address of EEPROM
-#define EEPROM_ADDR 0x4000
-
-void load_settings(void)
-{
-	uint8_t* eeprom = (uint8_t*)EEPROM_ADDR; // address where the settings are saved
-
-	// check if magic header is present
-	if (0x42 != *(eeprom + 0)) {
-		goto error;
-	}
-	// check if checksum is correct
-	uint8_t crc = 0;
-	for (uint8_t i = 0; i < sizeof(struct settings_t) + 2; i++) {
-		crc ^= *(eeprom + i);
-	}
-	if (0 != crc) {
-		goto error;
-	}
-	// now we can load the settings
-	for (uint8_t i = 0; i < sizeof(struct settings_t); i++) {
-		*(((uint8_t*)settings) + 0) = *(eeprom + 1 + i);
-	}
-
-	return;
-error: // use default in case of error
-	settings.i2c_slave_addr = 0x28;
-}
-
-bool save_settings(void)
-{
-	uint8_t* eeprom = (uint8_t*)EEPROM_ADDR; // address where the settings are saved
-	uint8_t i; // index variable
-	bool to_return = false; // if settings have been saved
-
-	if (!(FLASH_IAPSR & FLASH_IAPSR_DUL)) { // write protection is enabled
-		// disable DATA (e.g. EEPROM) write protection
-		FLASH_DUKR = FLASH_DUKR_KEY1;
-		FLASH_DUKR = FLASH_DUKR_KEY2;
-		if (!(FLASH_IAPSR & FLASH_IAPSR_DUL)) { // un-protecting failed
-			return false;
-		}
-	}
-	// write magic header
-	if (0x42 != *(eeprom + 0)) {
-		*(eeprom + 0) = 0x42;
-		if (!(FLASH_IAPSR & FLASH_IAPSR_EOP)) { // write failed
-			goto end;
-		}
-	}
-	// write settings
-	for (i = 0; i < sizeof(struct settings_t); i++) {
-		if (*(eeprom + 1 + i) != *(((uint8_t*)settings) + 0)) {
-			*(eeprom + 1 + i) = *(((uint8_t*)settings) + 0);
-			if (!(FLASH_IAPSR & FLASH_IAPSR_EOP)) { // write failed
-				goto end;
-			}
-		}
-	}
-	// write checksum
-	uint8_t crc = 0;
-	for (i = 0; i < 1 + sizeof(struct settings_t); i++) {
-		crc ^= *(eeprom + i);
-	}
-	if (*(eeprom + 1 + sizeof(struct settings_t)) != crc) {
-		*(eeprom + 1 + sizeof(struct settings_t)) = crc;
-		if (!(FLASH_IAPSR & FLASH_IAPSR_EOP)) { // write failed
-			goto end;
-		}
-	}
-
-	to_return = true; // saving settings succeeded
-
-end:
-	FLASH_IAPSR &= ~FLASH_IAPSR_DUL; // re-enable write protection
-	return to_return;
-}
-*/
-
 /**
  *  @warning only up to UINT32_MAX / 10 to be safe
  */