STM32 MCUs

Add support to STM32 microcontroller based on the Arduino Core STM32 board manager.

Author: ricaun

README.md

@@ -1,6 +1,6 @@
 # ArduinoUniqueID
 
-This Library gets the Unique ID / Manufacture Serial Number from the Atmel AVR, SAM, SAMD, and ESP Microcontroller.
+This Library gets the Unique ID / Manufacture Serial Number from the Atmel AVR, SAM, SAMD, STM32, and ESP Microcontroller.
 
 # Atmel AVR Microcontroller
 
@@ -61,6 +61,17 @@ The uniqueness of the serial number is guaranteed only when using all 128 bits.
 
 * Atmel SAMD21 ARM Cortex-M0 - 16 bytes
 
+# STM32 Microcontroller
+
+STM32 32-bit Arm Cortex MCUs has a unique 96-bit serial number which is a concatenation of three 32-bit words, the address is different depending on the microcontroller. 
+
+The [Arduino Core STM32](https://github.com/stm32duino/Arduino_Core_STM32) has the variable UID_BASE whos contain the first 32-bit word of the serial number.
+
+## Tested Microcontroller
+
+* STM32F103C8 (BluePill Board) - 12 bytes
+* STM32L073RZ (Nucleo L073RZ) - 12 bytes
+
 # Espressif ESP Microcontroller
 
 ESP microcontroller has basically two versions, ESP8266 and ESP32, each one has a specific function to request the chip id. <br/>

library.properties

@@ -1,10 +1,10 @@
 name=ArduinoUniqueID
-version=1.0.7
+version=1.0.8
 author=Luiz Henrique Cassettari
 maintainer=Luiz Henrique Cassettari <ricaun@gmail.com>
-sentence=Arduino Library to gets the Manufacture Serial Number from the Atmel AVR, SAM, SAMD, and ESP Microcontroller.
-paragraph=The ArduinoUniqueID Library use the buildin feature to select the manufacture serial number from the microcontroler. Suported microcontroler: Atmega328pb, Atmega328p, Atmega2560, Attiny85, SAM3X8E, SAMD21, ESP8266 & ESP32.
+sentence=Arduino Library to gets the Manufacture Serial Number from the Atmel AVR, SAM, SAMD, STM32, and ESP Microcontroller.
+paragraph=The ArduinoUniqueID Library use the buildin feature to select the manufacture serial number from the microcontroler. Suported microcontroler: Atmega328pb, Atmega328p, Atmega2560, Attiny85, SAM3X8E, SAMD21, STM32, ESP8266 & ESP32.
 category=Other
 url=https://github.com/ricaun/ArduinoUniqueID
-architectures=avr, esp8266, esp32, sam, samd
+architectures=avr, esp8266, esp32, sam, samd, stm32
 includes=ArduinoUniqueID.h

src/ArduinoUniqueID.cpp

@@ -88,6 +88,18 @@ ArduinoUniqueID::ArduinoUniqueID()
 		id[i*4+3] = (uint8_t)(pdwUniqueID[i] >> 0);
 	}
 
+#elif defined(ARDUINO_ARCH_STM32)
+	uint32_t pdwUniqueID[3];
+	pdwUniqueID[2] = *(uint32_t *)(UID_BASE + 0);
+	pdwUniqueID[1] = *(uint32_t *)(UID_BASE + 4);
+	pdwUniqueID[0] = *(uint32_t *)(UID_BASE + 8);
+	for (int i = 0; i < 3; i++)
+	{
+		id[i*4+3] = (uint8_t)(pdwUniqueID[i] >> 24);
+		id[i*4+2] = (uint8_t)(pdwUniqueID[i] >> 16);
+		id[i*4+1] = (uint8_t)(pdwUniqueID[i] >> 8);
+		id[i*4+0] = (uint8_t)(pdwUniqueID[i] >> 0);
+	}
 #endif
 }
 

src/ArduinoUniqueID.h

@@ -15,8 +15,9 @@
 #elif defined(ARDUINO_ARCH_ESP32)
 #elif defined(ARDUINO_ARCH_SAM)
 #elif defined(ARDUINO_ARCH_SAMD)
+#elif defined(ARDUINO_ARCH_STM32)
 #else
-#error "ArduinoUniqueID only works on AVR, SAM, SAMD and ESP Architecture"
+#error "ArduinoUniqueID only works on AVR, SAM, SAMD, STM32 and ESP Architecture"
 #endif
 
 #if defined(ARDUINO_ARCH_AVR)
@@ -41,6 +42,9 @@
 #elif defined(ARDUINO_ARCH_SAMD)
 #define UniqueIDsize 16
 #define UniqueIDbuffer 16
+#elif defined(ARDUINO_ARCH_STM32)
+#define UniqueIDsize 12
+#define UniqueIDbuffer 12
 #endif
 
 #define UniqueID8 (_UniqueID.id + UniqueIDbuffer - 8)