Geting crazy because of hardware issues on the nucleo ! but making progress now

ked/csl/interfaces/i2c.h

@@ -256,7 +256,7 @@ void i2cRead(i2c_t *i2cHardware, uint16_t *devAddress, uint8_t *registerAddress,
  * @param registerAddress is the regiter to be red from the device
  * @param data is the data whic has been red
  */
-void i2cMasterRecieve(i2c_t *i2cHardware, uint8_t devAddress, uint8_t *registerAddress, uint8_t *data);
+void i2cMasterRecieve(i2c_t *i2cHardware, uint8_t devAddress, uint8_t registerAddress, uint8_t *data);
 /**
  * @brief	Sends a Single Byte as master to the given devices register. 
  *			this function will adapt himself to the selected oppeartion mode (Polling / Int / DMA) 

ked/csl/stm32f042/Src/i2c.c

@@ -34,26 +34,29 @@ void i2cInit(i2c_t *i2cHardware)
 	I2C_BASE->CR1 &= ~I2C_CR1_PE;
 
 	//Configure analog filter. Anlalog filter is on
-	I2C_BASE->CR1 &=~ I2C_CR1_ANFOFF; 
+	//I2C_BASE->CR1 |= I2C_CR1_ANFOFF; 
 	
 	//Configure NoStrech Streching mode is disabled (slave only) 
-	I2C_BASE->CR1 |= I2C_CR1_NOSTRETCH; 
+	//I2C_BASE->CR1 |= I2C_CR1_NOSTRETCH; 
 
 	//Configure the clock
 	I2C_BASE->TIMINGR = i2cHardware->timing; 
 
 	//Automatic end mode (master mode) Enablede as default 
-	I2C_BASE->CR2 |= I2C_CR2_AUTOEND; 
+	I2C_BASE->CR2 &= ~I2C_CR2_AUTOEND; 
+	//I2C_BASE->CR2 |= I2C_CR2_AUTOEND; 
 
 	if(i2cHardware->mode == i2cModeMaster)
 	{
 		if(i2cHardware->addressSize == i2cAddressSizeTenBits)
 		{
 			I2C_BASE->CR2 |= I2C_CR2_ADD10; // 10 Bit addressing
+			I2C_BASE->CR2 &= ~I2C_CR2_HEAD10R; // 7 Bit header read turned on DEFAULT
 		}
 		else
 		{
 			I2C_BASE->CR2 &= ~I2C_CR2_ADD10; // 7 Bit addressing DEFAULT
+			I2C_BASE->CR2 |= I2C_CR2_HEAD10R; // 7 Bit header read turned off DEFAULT
 		}
 	}
 
@@ -97,36 +100,40 @@ void i2cRead(	i2c_t *i2cHardware,
 }
 
 // this function still doesn't implment 10 bit oopeartion TODO
-void i2cMasterRecieve(i2c_t *i2cHardware, uint8_t devAddress, uint8_t *registerAddress, uint8_t *data)
+void i2cMasterRecieve(i2c_t *i2cHardware, uint8_t devAddress, uint8_t registerAddress, uint8_t *data)
 {
 	// Wait until no communication is ongoign
-	while(I2C_BASE->ISR & (I2C_ISR_BUSY));
+	while((I2C_BASE->ISR & (I2C_ISR_BUSY))==I2C_ISR_BUSY);
 	
 	i2cHardware->state = i2cRecieving;
 	
 	//Slave address
-	I2C_BASE->CR2 |= devAddress << 1; // The bit no 0 is not taken in concideration in 7bit mode	
+	I2C_BASE->CR2 |= 0x40 << 1; // The bit no 0 is not taken in concideration in 7bit mode	
 	
 	//Read Mode
-	I2C_BASE->CR2 |= I2C_CR2_RD_WRN;
+	I2C_BASE->CR2 &= ~I2C_CR2_RD_WRN;
 
-	data = I2C_BASE->TXDR;
+	//Set Buffer size
+	I2C_BASE->CR2 |= 1 << I2C_CR2_NBYTES_Pos;
+
+	//Check if the TX buffer is empty
+	while(!(I2C_BASE->ISR & (I2C_ISR_TXE)));
+	//Register to be sent
+	I2C_BASE->TXDR |= 0xCE; 
+	
 	//Generate start condition
 	I2C_BASE->CR2 |= I2C_CR2_START; 
-
+	
 	//Wait until the start condition in generated. 
 	while(!(I2C_BASE->ISR & (I2C_ISR_BUSY)));
 	
-	//Check if the TX buffer is empty
-	while(!(I2C_BASE->ISR & (I2C_ISR_TXE)));
-	
-	//write the register that we wahtn to read 	
-	I2C_BASE->TXDR = registerAddress; 
+
+	//while(!(I2C_BASE->ISR & (I2C_ISR_RXNE)));
 
 	i2cCR1= I2C_BASE->CR1;
 	i2cCR2= I2C_BASE->CR2;
 	i2cISR= I2C_BASE->ISR;
-	//while(!(I2C_BASE->ISR & (I2C_ISR_RXNE)));
-	//data = I2C_BASE->RXDR;	
+
+	data = I2C_BASE->RXDR;	
 }
 

main.c

@@ -114,12 +114,12 @@ int main(int argc, char *argv[])
 	pinWrite(pinB3,0);
 
 	// Pin configuration for i2c	
-	pinInit(pinB6);
-	pinInit(pinB7);
-	pinConfig(pinB6, alternate, openDrain, none, veryFast);// I2C SCL 
-	pinConfig(pinB7, alternate, openDrain, none, veryFast);// I2C CSA
-	pinSetAlternate(pinB6, 1); 
-	pinSetAlternate(pinB7, 1);
+	pinInit(pinA9);
+	pinInit(pinA10);
+	pinConfig(pinA9, alternate, openDrain, pullUp, fast);// I2C SCL 
+	pinConfig(pinA10, alternate, openDrain, pullUp, fast);// I2C CSA
+	pinSetAlternate(pinA9, 4); 
+	pinSetAlternate(pinA10, 4);
 
 	i2c_t i2c_1;
 	i2c_1.channelNo = I2C_CH_1; 
@@ -156,7 +156,7 @@ int main(int argc, char *argv[])
 	print_Usart(usart2, "\n\r"); 
 	print_Usart(usart2, "I2C Send Mode\n\r"); 
 
-	i2cMasterRecieve(&i2c_1,slaveAddress,&registerToRead,&i2cRecieved);
+	i2cMasterRecieve(&i2c_1,slaveAddress,registerToRead,&i2cRecieved);
 	
 	print_Usart(usart2, "\n\r"); 
 	print_Usart(usart2, "CR1 : ");