From 4d18916f5c89b08b88577d3044490a296f8b0c86 Mon Sep 17 00:00:00 2001
From: KLASSENTS <klassen@elron.tech>
Date: Wed, 15 Jan 2025 16:23:29 +0700
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---
 README.md               | 1 +
 cores/arduino/board.cpp | 4 ++--
 cores/arduino/board.h   | 3 +--
 cores/arduino/main.cpp  | 1 -
 4 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 60c82fd..4a03a58 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,7 @@
 |[Adafruit_ILI9341](https://docs.arduino.cc/libraries/adafruit-ili9341/)|Библиотека для работы с дисплеем Adafruit ILI9341|
 |[TFT](https://docs.arduino.cc/libraries/tft/)|Графическая библиотека, совместимая с большинством TFT-дисплеев на базе чипа ST7735|
 |[Adafruit_TCS34725](https://docs.arduino.cc/libraries/adafruit-tcs34725/)|Библиотека для работы с датчиком цвета с ИК-фильтром TCS34725|
+|[DS18B20](https://docs.arduino.cc/libraries/ds18b20/)|Библиотека для работы с однопроводным датчиком температуры Maxim Integrated DS18B20|
 
 
 # Полезные ссылки 
diff --git a/cores/arduino/board.cpp b/cores/arduino/board.cpp
index 876cb87..da0f39b 100644
--- a/cores/arduino/board.cpp
+++ b/cores/arduino/board.cpp
@@ -4,8 +4,8 @@
 #include "Arduino.h"
 
 // --------------------- init --------------------- // 
-// called before setup()
-void pre_init(void)
+// called from crt0.S before constructors initialization
+extern "C" void SystemInit(void)
 {
     // set irq vector to ram region
     write_csr(mtvec, 0x02000000);
diff --git a/cores/arduino/board.h b/cores/arduino/board.h
index 61599a0..ac36c47 100644
--- a/cores/arduino/board.h
+++ b/cores/arduino/board.h
@@ -5,8 +5,7 @@ extern volatile bool use_error_messages;
 #define DISABLE_ERROR_MESSAGES()    (use_error_messages = false)
 #define ENABLE_ERROR_MESSAGES()     (use_error_messages = true)
 
-// functions for init called before and after setup()
-void pre_init(void) ;
+// function for init called after setup()
 void post_init(void);
 
 #endif /* _BOARD_H_ */
diff --git a/cores/arduino/main.cpp b/cores/arduino/main.cpp
index b85dab3..6535748 100644
--- a/cores/arduino/main.cpp
+++ b/cores/arduino/main.cpp
@@ -4,7 +4,6 @@
 
 int main()
 {
-    pre_init();
     setup();
     post_init();