From 6f4381df53235b4f97815d07ce560d704ad550ab Mon Sep 17 00:00:00 2001
From: Jason Smith <jason.inet@gmail.com>
Date: Mon, 30 Nov 2020 22:25:44 -0800
Subject: [PATCH] Prevent Watchdog reset writing Creality 4.x EEPROM (#20328)
---
Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp b/Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp
index 94b5e099bd..09fe8f9103 100644
--- a/Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp
+++ b/Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp
@@ -48,6 +48,8 @@ bool PersistentStore::access_start() { eeprom_init(); return true; }
bool PersistentStore::access_finish() { return true; }
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+ size_t written = 0;
+
while (size--) {
uint8_t v = *value;
uint8_t * const p = (uint8_t * const)pos;
@@ -55,7 +57,10 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
// so only write bytes that have changed!
if (v != eeprom_read_byte(p)) {
eeprom_write_byte(p, v);
- delay(2);
+ if (++written % 128 == 0)
+ safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
+ else
+ delay(2);
if (eeprom_read_byte(p) != v) {
SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
return true;