Initial commit

Core/Src/SoftI2C.c

@@ -0,0 +1,164 @@
+
+#include "SoftI2C.h"
+
+
+#include "stm32f4xx_hal.h"
+
+
+
+void Soft_I2C_Init()
+{
+
+}
+
+void Soft_I2C_Transmit(uint8_t address, uint8_t* databuffer,uint8_t bufferlength)
+{
+	uint8_t nack = 0;
+
+	setSDCLK();	//Generate Start Condition
+	bitwait();
+	setSDA(0);
+	bitwait();
+
+	for(int i = 0; i < 8; i++)	//Write I2C-Slave Address
+	{
+		setSDA((address>>(7-i) & 0x01));
+		bitwait();
+		resetSDCLK();
+		bitwait();
+		setSDCLK();
+		bitwait();
+	}
+
+	SDA_ReadMode();
+	resetSDCLK();
+	bitwait();
+	nack += readSDA();
+	bitwait();
+	SDA_WriteMode();
+	setSDA(0);
+	setSDCLK();
+	bitwait();
+
+
+	for(int n = 0; n<bufferlength;n++)	//Write Data
+	{
+
+		for(int i = 0; i < 8; i++)
+		{
+			setSDA((databuffer[n]>>(7-i) & 0x01));
+			bitwait();
+			resetSDCLK();
+			bitwait();
+			setSDCLK();
+			bitwait();
+		}
+
+		SDA_ReadMode();
+		resetSDCLK();
+		bitwait();
+		nack += readSDA();
+		bitwait();
+		SDA_WriteMode();
+		setSDA(0);
+		setSDCLK();
+		bitwait();
+	}
+
+	resetSDCLK();	//Generate Stop Condition
+	bitwait();
+	setSDA(1);
+	bitwait();
+
+
+}
+
+void Soft_I2C_Receive(uint8_t address, uint8_t* databuffer, uint8_t bufferlength)
+{
+	uint8_t nack = 0;
+
+	setSDCLK();	//Generate Start Condition
+	bitwait();
+	setSDA(0);
+	bitwait();
+
+	for(int i = 0; i < 8; i++)	//Write I2C-Slave Address
+	{
+		setSDA((address>>(7-i) & 0x01));
+		bitwait();
+		resetSDCLK();
+		bitwait();
+		setSDCLK();
+		bitwait();
+	}
+
+	SDA_ReadMode();
+	resetSDCLK();
+	bitwait();
+	nack += readSDA();
+	bitwait();
+
+
+	for(int n = 0; n<bufferlength;n++)
+	{
+		databuffer[n] = 0;
+		for(int i = 0; i < 8; i++)
+		{
+			setSDCLK();
+			bitwait();
+			resetSDCLK();
+			bitwait();
+			databuffer[n] |= readSDA()<<(7-i);
+			bitwait();
+		}
+
+		setSDCLK();
+		bitwait();
+
+		SDA_WriteMode();
+		setSDA(0);
+		bitwait();
+		resetSDCLK();
+		bitwait();
+		SDA_ReadMode();
+	}
+
+	resetSDCLK();	//Generate Stop Condition
+	bitwait();
+	setSDA(1);
+	bitwait();
+
+}
+
+void SDA_WriteMode()
+{
+
+}
+
+void SDA_ReadMode()
+{
+
+}
+
+void setSDA(uint8_t state)
+{
+
+}
+
+uint8_t readSDA()
+{
+
+}
+
+void bitwait()
+{
+
+}
+void setSDCLK()
+{
+
+}
+void resetSDCLK()
+{
+
+}