WebSVN - FlightCtrl - Blame - Rev 1638 - /tags/V2.12a/twimaster.c

Rev	Author	Line No.	Line
1	ingob	1	/*############################################################################
		2	############################################################################*/
		3
		4	#include "main.h"
		5
918	hbuss	6	volatile unsigned char twi_state = 0;
1	ingob	7	unsigned char motor = 0;
1210	hbuss	8	unsigned char motorread = 0,MissingMotor = 0;
1479	killagreg	9
		10	MotorData_t Motor[MAX_MOTORS];
		11
1322	hbuss	12	unsigned int I2CError = 0;
1	ingob	13
		14	//############################################################################
		15	//Initzialisieren der I2C (TWI) Schnittstelle
		16	void i2c_init(void)
		17	//############################################################################
		18	{
		19	TWSR = 0;
1479	killagreg	20	TWBR = ((SYSCLK/SCL_CLOCK)-16)/2;
1	ingob	21	}
		22
		23	//############################################################################
		24	//Start I2C
1479	killagreg	25	void i2c_start(void)
1	ingob	26	//############################################################################
		27	{
		28	TWCR = (1<<TWSTA) \| (1<<TWEN) \| (1<<TWINT) \| (1<<TWIE);
		29	}
		30
		31	//############################################################################
		32	void i2c_stop(void)
		33	//############################################################################
		34	{
		35	TWCR = (1<<TWEN) \| (1<<TWSTO) \| (1<<TWINT);
		36	}
		37
173	holgerb	38	void i2c_reset(void)
1	ingob	39	//############################################################################
173	holgerb	40	{
1479	killagreg	41	i2c_stop();
173	holgerb	42	twi_state = 0;
		43	motor = TWDR;
		44	motor = 0;
		45	TWCR = 0x80;
		46	TWAMR = 0;
		47	TWAR = 0;
		48	TWDR = 0;
		49	TWSR = 0;
		50	TWBR = 0;
		51	i2c_init();
		52	i2c_start();
		53	i2c_write_byte(0);
		54	}
		55
		56	//############################################################################
1209	hbuss	57	void i2c_write_byte(char byte)
1	ingob	58	//############################################################################
1479	killagreg	59	{
1	ingob	60	TWSR = 0x00;
		61	TWDR = byte;
		62	TWCR = (1<<TWINT) \| (1<<TWEN) \| (1<<TWIE);
		63	}
		64
1209	hbuss	65	/****************************************/
		66	/* Write to I2C */
		67	/****************************************/
		68	void I2C_WriteByte(int8_t byte)
		69	{
		70	// move byte to send into TWI Data Register
		71	TWDR = byte;
		72	// clear interrupt flag (TWINT = 1)
		73	// enable i2c bus (TWEN = 1)
		74	// enable interrupt (TWIE = 1)
		75	TWCR = (1<<TWINT) \| (1<<TWEN) \| (1<<TWIE);
		76	}
		77
		78	/****************************************/
		79	/* Receive byte and send ACK */
		80	/****************************************/
		81	void I2C_ReceiveByte(void)
		82	{
		83	TWCR = (1<<TWINT) \| (1<<TWEN) \| (1<<TWIE) \| (1<<TWEA);
		84	}
		85
		86	/****************************************/
		87	/* I2C receive last byte and send no ACK*/
		88	/****************************************/
		89	void I2C_ReceiveLastByte(void)
		90	{
		91	TWCR = (1<<TWINT) \| (1<<TWEN) \| (1<<TWIE);
		92	}
		93
		94
1638	holgerb	95	/*
1	ingob	96	//############################################################################
		97	SIGNAL (TWI_vect)
		98	//############################################################################
		99	{
1211	hbuss	100	static unsigned char missing_motor;
1210	hbuss	101	switch(twi_state++)
1	ingob	102	{
1210	hbuss	103	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		104	// Writing the Data
		105	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1	ingob	106	case 0:
1210	hbuss	107	while(Mixer.Motor[motor][0] <= 0 && motor < MAX_MOTORS) motor++; // skip if not used
1479	killagreg	108	if(motor == MAX_MOTORS) // writing finished -> now read
		109	{
		110	motor = 0;
		111	twi_state = 3;
1210	hbuss	112	i2c_write_byte(0x53+(motorread*2));
1479	killagreg	113	}
1209	hbuss	114	else i2c_write_byte(0x52+(motor*2));
1	ingob	115	break;
		116	case 1:
1479	killagreg	117	i2c_write_byte(Motor[motor++].SetPoint);
1111	hbuss	118	break;
		119	case 2:
1479	killagreg	120	if(TWSR == 0x30)
		121	{
		122	if(!missing_motor) missing_motor = motor;
		123	if((Motor[motor-1].State & MOTOR_STATE_ERROR_MASK) < MOTOR_STATE_ERROR_MASK) Motor[motor-1].State++; // increment error counter and handle overflow
1322	hbuss	124	}
1111	hbuss	125	i2c_stop();
1210	hbuss	126	I2CTimeout = 10;
1209	hbuss	127	twi_state = 0;
1479	killagreg	128	i2c_start();
		129	break;
1210	hbuss	130	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		131	// Reading Data
		132	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1111	hbuss	133	case 3:
1211	hbuss	134	//Transmit 1st byte for reading
1210	hbuss	135	if(TWSR != 0x40) // Error?
1479	killagreg	136	{
		137	Motor[motorread].State &= ~MOTOR_STATE_PRESENT_MASK; // clear present bit
		138	motorread++;
1211	hbuss	139	if(motorread >= MAX_MOTORS) motorread = 0;
		140	i2c_stop();
1210	hbuss	141	twi_state = 0;
		142	}
1479	killagreg	143	else
1211	hbuss	144	{
1479	killagreg	145	Motor[motorread].State \|= MOTOR_STATE_PRESENT_MASK; // set present bit
1211	hbuss	146	I2C_ReceiveByte();
		147	}
1210	hbuss	148	MissingMotor = missing_motor;
1211	hbuss	149	missing_motor = 0;
1111	hbuss	150	break;
1210	hbuss	151	case 4: //Read 1st byte and transmit 2nd Byte
1479	killagreg	152	Motor[motorread].Current = TWDR;
1209	hbuss	153	I2C_ReceiveLastByte(); //nack
		154	break;
1210	hbuss	155	case 5:
1209	hbuss	156	//Read 2nd byte
1479	killagreg	157	Motor[motorread].MaxPWM = TWDR;
		158	motorread++; // next motor
1211	hbuss	159	if(motorread >= MAX_MOTORS) motorread = 0;
1111	hbuss	160	i2c_stop();
1209	hbuss	161	twi_state = 0;
1111	hbuss	162	break;
1479	killagreg	163
1210	hbuss	164	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		165	// writing Gyro-Offset
		166	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1479	killagreg	167	case 8:
1111	hbuss	168	i2c_write_byte(0x98); // Address of the DAC
		169	break;
1479	killagreg	170	case 9:
1111	hbuss	171	i2c_write_byte(0x10); // Update Channel A
		172	break;
1479	killagreg	173	case 10:
1111	hbuss	174	i2c_write_byte(AnalogOffsetNick); // Value
		175	break;
1479	killagreg	176	case 11:
1111	hbuss	177	i2c_write_byte(0x80); // Value
		178	break;
1479	killagreg	179	case 12:
		180	i2c_stop();
1111	hbuss	181	I2CTimeout = 10;
1479	killagreg	182	i2c_start();
1111	hbuss	183	break;
1479	killagreg	184	case 13:
1111	hbuss	185	i2c_write_byte(0x98); // Address of the DAC
		186	break;
1479	killagreg	187	case 14:
1111	hbuss	188	i2c_write_byte(0x12); // Update Channel B
		189	break;
1479	killagreg	190	case 15:
1111	hbuss	191	i2c_write_byte(AnalogOffsetRoll); // Value
		192	break;
1479	killagreg	193	case 16:
1111	hbuss	194	i2c_write_byte(0x80); // Value
		195	break;
1479	killagreg	196	case 17:
		197	i2c_stop();
1111	hbuss	198	I2CTimeout = 10;
1479	killagreg	199	i2c_start();
1111	hbuss	200	break;
1479	killagreg	201	case 18:
1111	hbuss	202	i2c_write_byte(0x98); // Address of the DAC
		203	break;
1479	killagreg	204	case 19:
1111	hbuss	205	i2c_write_byte(0x14); // Update Channel C
		206	break;
1479	killagreg	207	case 20:
1111	hbuss	208	i2c_write_byte(AnalogOffsetGier); // Value
		209	break;
1479	killagreg	210	case 21:
1111	hbuss	211	i2c_write_byte(0x80); // Value
		212	break;
1479	killagreg	213	case 22:
		214	i2c_stop();
1111	hbuss	215	I2CTimeout = 10;
		216	twi_state = 0;
		217	break;
1209	hbuss	218	default: twi_state = 0;
1479	killagreg	219	break;
1209	hbuss	220	}
1111	hbuss	221	TWCR \|= 0x80;
		222	}
1638	holgerb	223	*/
		224
		225	/*
		226	if(DataArray[3] & 0x01) Parameter.PwmScaling = DataArray[4];
		227	if(DataArray[3] & 0x02) Parameter.MaxStrom = DataArray[5];
		228	if(DataArray[3] & 0x04) Parameter.TemperaturLimiter = DataArray[6];
		229	if(DataArray[3] & 0x08) Parameter.SkaliereStrom = DataArray[7];
		230	if(DataArray[3] & 0x10) Parameter.Bitconfig = DataArray[8];
		231	*/
		232
		233	//############################################################################
		234	SIGNAL (TWI_vect)
		235	//############################################################################
		236	{ // 2 3 4 5 6 7 8 9
		237	unsigned char test[] = {0,0,'#',0x1F,255,30,100,64,0x00,7,8,9,10};
		238	static unsigned char missing_motor,send = 0,crc = 0;
		239	switch(twi_state++)
		240	{
		241	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		242	// Writing the Data
		243	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		244	case 0:
		245	while(Mixer.Motor[motor][0] <= 0 && motor < MAX_MOTORS) motor++; // skip if not used
		246	if(motor == MAX_MOTORS) // writing finished -> now read
		247	{
		248	motor = 0;
		249	twi_state = 4;
		250	i2c_write_byte(0x53+(motorread*2));
		251	}
		252	else i2c_write_byte(0x52+(motor*2));
		253	send = 0;
		254	break;
		255	case 1:
		256	i2c_write_byte(Motor[motor].SetPoint);
		257	if(!(Motor[motor].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) twi_state++;
		258	break;
		259	case 2:
		260	if(!send++)
		261	{
		262	i2c_write_byte((Motor[motor].SetPointLowerBits << 1));// + (7 << 0));
		263	crc = 0xAA;
		264	}
		265	else
		266	if(send == 9) i2c_write_byte(crc);
		267	else
		268	{
		269	crc += test[send];
		270	i2c_write_byte(test[send]);
		271	}
		272	if(!MotorenEin && motor == motorread && !PC_MotortestActive && (Motor[motorread].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) if(send <= 10) twi_state--;
		273	break;
		274	case 3:
		275	motor++;
		276	if(TWSR == 0x30)
		277	{
		278	if(!missing_motor) missing_motor = motor;
		279	if((Motor[motor-1].State & MOTOR_STATE_ERROR_MASK) < MOTOR_STATE_ERROR_MASK) Motor[motor-1].State++; // increment error counter and handle overflow
		280	}
		281	i2c_stop();
		282	I2CTimeout = 10;
		283	twi_state = 0;
		284	i2c_start();
		285	break;
		286	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		287	// Reading Data
		288	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		289	case 4:
		290	//Transmit 1st byte for reading
		291	if(TWSR != 0x40) // Error?
		292	{
		293	Motor[motorread].State &= ~MOTOR_STATE_PRESENT_MASK; // clear present bit
		294	motorread++;
		295	if(motorread >= MAX_MOTORS) motorread = 0;
		296	i2c_stop();
		297	twi_state = 0;
		298	}
		299	else
		300	{
		301	Motor[motorread].State \|= MOTOR_STATE_PRESENT_MASK; // set present bit
		302	I2C_ReceiveByte();
		303	}
		304	MissingMotor = missing_motor;
		305	missing_motor = 0;
		306	break;
		307	case 5: //Read 1st byte and transmit 2nd Byte
		308	Motor[motorread].Current = TWDR;
		309	I2C_ReceiveByte(); //nack
		310	break;
		311	case 6:
		312	//Read 2nd byte and transmit 3rd Byte
		313	Motor[motorread].MaxPWM = TWDR;
		314	if(TWDR == 250)
		315	{
		316	//if(!Motor[motor].SetPoint)
		317	Motor[motorread].Version \|= MOTOR_STATE_NEW_PROTOCOL_MASK;
		318	}
		319	I2C_ReceiveLastByte(); //nack
		320	break;
		321	case 7: // read next
		322	if(TWDR == 255) { if(!MotorenEin) Motor[motorread].Version = 0; DebugOut.Analog[24]++;}
		323	Motor[motorread].Temperature = TWDR;
		324	motorread++; // next motor
		325	if(motorread >= MAX_MOTORS) { motorread = 0; }
		326	i2c_stop();
		327	twi_state = 0;
		328	break;
		329	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		330	// writing Gyro-Offset
		331	//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
		332	case 18:
		333	i2c_write_byte(0x98); // Address of the DAC
		334	break;
		335	case 19:
		336	i2c_write_byte(0x10); // Update Channel A
		337	break;
		338	case 20:
		339	i2c_write_byte(AnalogOffsetNick); // Value
		340	break;
		341	case 21:
		342	i2c_write_byte(0x80); // Value
		343	break;
		344	case 22:
		345	i2c_stop();
		346	I2CTimeout = 10;
		347	i2c_start();
		348	break;
		349	case 23:
		350	i2c_write_byte(0x98); // Address of the DAC
		351	break;
		352	case 24:
		353	i2c_write_byte(0x12); // Update Channel B
		354	break;
		355	case 25:
		356	i2c_write_byte(AnalogOffsetRoll); // Value
		357	break;
		358	case 26:
		359	i2c_write_byte(0x80); // Value
		360	break;
		361	case 27:
		362	i2c_stop();
		363	I2CTimeout = 10;
		364	i2c_start();
		365	break;
		366	case 28:
		367	i2c_write_byte(0x98); // Address of the DAC
		368	break;
		369	case 29:
		370	i2c_write_byte(0x14); // Update Channel C
		371	break;
		372	case 30:
		373	i2c_write_byte(AnalogOffsetGier); // Value
		374	break;
		375	case 31:
		376	i2c_write_byte(0x80); // Value
		377	break;
		378	case 32:
		379	i2c_stop();
		380	I2CTimeout = 10;
		381	twi_state = 0;
		382	break;
		383	default: twi_state = 0;
		384	break;
		385	}
		386	TWCR \|= 0x80;
		387	}

Subversion Repositories FlightCtrl

(root)/tags/V2.12a/twimaster.c @ 2739 - Rev 1638