I2C – Datenbyte wird nicht gesendet.

[arwar52]

Hallo Kollegen,
hat nicht lange gedauert und …. da bin ich wieder mit ne Frage

Bin am „basteln“ am I2C Protokoll, STM32F103.
Funktionier erstmal zu 50% - das Adress-Byte wird gesendet und acknowledget.

Aber Data Bytes werden nicht gesendet.

Hat jemand `ne Idee woran es liegen kann?
Eistellungen für GPIO, Clock, ... sind gemacht.

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Der leerer Raum zwischen dem Address Byte und der STOP-Sequenz is durch die Schleife
for(k=0; k<350; k++){} verursacht.
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void I2C2Init(void) {

	uI2C_CCR * pI2c2Ccr 	= (uI2C_CCR *)(I2C2_ADR + I2C_CCR_OFFSET);
	uI2C_CCR    I2C2Ccr;

	uI2C_CR1 * pI2c2Cr1 	= (uI2C_CR1 *)(I2C2_ADR + I2C_CR1_OFFSET);
	uI2C_CR1    I2C2Cr1;

	uI2C_CR2 * pI2c2Cr2 	= (uI2C_CR2 *)(I2C2_ADR + I2C_CR2_OFFSET);
	uI2C_CR2    I2C2Cr2;

	uI2C_TRISE * pI2c2Trise = (uI2C_TRISE *)(I2C2_ADR + I2C_TRISE_OFFSET);
	uI2C_TRISE    I2C2Trise;


						//RefMannual page 782-783
	I2C2Cr2.All = 0;
	I2C2Cr2.Bit.FREQ = 		0x36;			//36;					//0x08
	pI2c2Cr2->All = I2C2Cr2.All;

	I2C2Ccr.All = 0;
	I2C2Ccr.Bit.CCR = 0x00B4;				//0x28;					//Specification, page 70
	pI2c2Ccr->All = I2C2Ccr.All;

	I2C2Trise.All = 0;
	I2C2Trise.Bit.TRISE = 0x12;    			//0x09;
	pI2c2Trise->All = I2C2Trise.All;

	I2C2Cr1.All = 0;
	I2C2Cr1.Bit.ACK = 1;					//1: Acknowledge returned after a byte is received
	I2C2Cr1.Bit.PE = 1;
	pI2c2Cr1->All = I2C2Cr1.All;
}



void I2cSend(void){

	extern tTASTER TasterData[15];

	uI2C_DR   *pI2c2Dr 		= (uI2C_DR  *)(I2C2_ADR + I2C_DR_OFFSET);
	uI2C_DR    I2C2Dr;
	uI2C_CR1  *pI2c2Cr1 	= (uI2C_CR1 *)(I2C2_ADR + I2C_CR1_OFFSET);
	uI2C_CR1    I2C2Cr1;

	uI2C_SR1  *pI2c2Sr1 	= (uI2C_SR1 *)(I2C2_ADR + I2C_SR1_OFFSET);
	uI2C_SR1    I2C2Sr1;
	uI2C_SR2  *pI2c2Sr2 	= (uI2C_SR2 *)(I2C2_ADR + I2C_SR2_OFFSET);
	uI2C_SR2    I2C2Sr2;


	unsigned char AddressI2c = 0;
	unsigned char MessageI2c = 0;

	unsigned char i = 0;
	unsigned int  k = 0;

	for(i = 1; i<=14; i++){

		AddressI2c = TasterData[i].AddressI2c;	//daten aus Array bereitstellen
		MessageI2c = TasterData[i].MessageI2c;	//um Verzögerungen beim Senden zu vermeiden

		while(0 != pI2c2Sr2->Bit.BUSY){			//wait for free bus
			asm("NOP");
		}

		I2C2Dr.All = 0;

		I2C2Cr1.All = pI2c2Cr1->All;
		I2C2Cr1.Bit.START = 1;
		pI2c2Cr1->All = I2C2Cr1.All;

		while(1 != pI2c2Sr2->Bit.MSL){			//is Master Mode set?
			asm("NOP");
		}

		I2C2Sr1.All = pI2c2Sr1->All;			//SB=1, cleared by reading SR1 register ...

		I2C2Dr.Bit.DR 	= AddressI2c;			//...followed by writing DR register with Address.
		pI2c2Dr->All  = I2C2Dr.All;				//write address in DR.

		I2C2Sr1.All = pI2c2Sr1->All;			//ADDR=1, cleared by reading SR1 register ...
		I2C2Sr2.All = pI2c2Sr2->All;			//...followed by reading SR2

		while(0 != pI2c2Sr1->Bit.ADDR){			//Is the address send?
			asm("NOP");
		}

		while(1 != pI2c2Sr1->Bit.TxE){			//TxE=1, shift register empty, data register empty
			asm("NOP");
		}

		I2C2Dr.Bit.DR 	= MessageI2c;
		pI2c2Dr->All  = I2C2Dr.All;				//write Data in DR.

//		for(k=0; k<350; k++){}

		I2C2Cr1.All = pI2c2Cr1->All;
		I2C2Cr1.Bit.STOP = 1;
		pI2c2Cr1->All = I2C2Cr1.All;
	}

}