Device drivers in mc

#include "LM75.h"

char LM75_PowerOn (LM75_StructTypeDef * LM75_Struct, LM75_PowerTypeDef Enable)
{
	return LM75_Struct->WriteReg(LM75_Struct->I2C_Adrs, LM75_ConfigReg, Enable & 1);
}

char LM75_GetResult (LM75_StructTypeDef * LM75_Struct)
{
	static char result;
	static signed char tmp[2];
	
	result = LM75_Struct->ReadReg(LM75_Struct->I2C_Adrs, LM75_TempReg, (char*)tmp, sizeof(tmp));
	LM75_Struct->T = (float)(tmp[0]);
	if (tmp[1] & 0x80) LM75_Struct->T += 0.5;
	
	return result;
}

typedef struct
{
	/* Variables */
	float T;
	char I2C_Adrs;
	
	/* Functions */
[B]	char (*WriteReg)(char I2C_Adrs, char Reg, char Value);
	char (*ReadReg) (char I2C_Adrs, char Reg, char * buf, char size);[/B]
	
}LM75_StructTypeDef;

LM75_StructTypeDef * LM75_Driver = malloc(sizeof(*LM75_Driver));

LM75_Driver -> I2C_Adrs = 0x90;
LM75_Driver -> WriteReg = LM75_SPI_Write;
LM75_Driver -> ReadReg = LM75_SPI_Read;

if (LM75_PowerOn (LM75_Driver, ENABLE)) //error, sensor not exist, kill driver
free(LM75_Driver);