Implement I2C generic device and STM32 specific; Not yet tested, will be with ADC

src/i2c.cpp

@@ -0,0 +1,21 @@
+#include <sta/i2c.hpp>
+
+namespace sta {
+    I2cDevice::I2cDevice(uint16_t address_7bit, Mutex* mutex, bool master) {
+        this->address = address_7bit << 1;
+        this->mutex = mutex;
+        this->master = master;
+    }
+
+    void I2cDevice::acquire() {
+        if (this->mutex != nullptr) {
+            mutex->acquire();
+        }
+    }
+
+    void I2cDevice::release() {
+        if (this->mutex != nullptr) {
+            mutex->release();
+        }
+    }
+}

src/stm32/i2c.cpp

@@ -0,0 +1,53 @@
+#include <sta/stm32/i2c.hpp>
+
+namespace sta {
+    STM32I2cDevice::STM32I2cDevice(I2C_HandleTypeDef* i2cHandle, uint16_t address, Mutex* mutex, bool master, bool blocking)
+    : I2cDevice(address, mutex, master, blocking) {
+        this->master = master;
+    }
+
+    bool STM32I2cDevice::transmit(uint8_t* data, uint16_t size) {
+        HAL_StatusTypeDef res;
+
+        if (this->blocking) {
+        	if (!this->master) {
+        		res = HAL_I2C_Master_Transmit(i2cHandle, address, data, size, this->timeout);
+        	} else {
+        		res = HAL_I2C_Slave_Transmit(i2cHandle          , data, size, this->timeout);
+        	}
+        } else {
+        	if (!this->master) {
+        		res = HAL_I2C_Master_Transmit_IT(i2cHandle, address, data, size);
+        	} else {
+        		res = HAL_I2C_Slave_Transmit_IT(i2cHandle          , data, size);
+        	}
+        }
+
+        return res == HAL_OK;
+    }
+
+    bool STM32I2cDevice::receive(uint8_t* data, uint16_t size) {
+    	HAL_StatusTypeDef res;
+
+    	if (this->blocking) {
+    		if (!this->master) {
+    			res = HAL_I2C_Master_Receive(i2cHandle, address, data, size, this->timeout);
+    		} else {
+    			res = HAL_I2C_Slave_Receive(i2cHandle          , data, size, this->timeout);
+    		}
+    	} else {
+    		if (!this->master) {
+    			res = HAL_I2C_Master_Receive_IT(i2cHandle, address, data, size);
+    		} else {
+    			res = HAL_I2C_Slave_Receive_IT(i2cHandle          , data, size);
+    		}
+    	}
+
+    	return res == HAL_OK;
+    }
+
+    bool STM32I2cDevice::deviceReady() {
+    	HAL_StatusTypeDef res = HAL_I2C_IsDeviceReady(this->i2cHandle, this->address, 8, this->timeout);
+    	return res == HAL_OK;
+    }
+}