| 0,0 → 1,468 |
|---|
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Copyright (c) Holger Buss, Ingo Busker |
| // + Nur für den privaten Gebrauch |
| // + www.MikroKopter.com |
| // + porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
| // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
| // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
| // + bzgl. der Nutzungsbedingungen aufzunehmen. |
| // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
| // + Verkauf von Luftbildaufnahmen, usw. |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
| // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
| // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
| // + eindeutig als Ursprung verlinkt werden |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
| // + Benutzung auf eigene Gefahr |
| // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
| // + mit unserer Zustimmung zulässig |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
| // + this list of conditions and the following disclaimer. |
| // + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived |
| // + from this software without specific prior written permission. |
| // + * The use of this project (hardware, software, binary files, sources and documentation) is only permittet |
| // + for non-commercial use (directly or indirectly) |
| // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
| // + with our written permission |
| // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
| // + clearly linked as origin |
| // + * porting to systems other than hardware from www.mikrokopter.de is not allowed |
| // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| // + POSSIBILITY OF SUCH DAMAGE. |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| |
| #include <avr/io.h> |
| #include <avr/interrupt.h> |
| #include <util/twi.h> |
| #include "eeprom.h" |
| #include "twimaster.h" |
| #include "fc.h" |
| #include "analog.h" |
| #include "uart.h" |
| #include "timer0.h" |
| |
| volatile uint8_t twi_state = TWI_STATE_MOTOR_TX; |
| volatile uint8_t dac_channel = 0; |
| volatile uint8_t motor_write = 0; |
| volatile uint8_t motor_read = 0; |
| volatile uint8_t I2C_TransferActive = 0; |
| |
| volatile uint16_t I2CTimeout = 100; |
| |
| uint8_t MissingMotor = 0; |
| |
| volatile uint8_t BLFlags = 0; |
| |
| MotorData_t Motor[MAX_MOTORS]; |
| |
| // bit mask for witch BL the configuration should be sent |
| volatile uint16_t BLConfig_WriteMask = 0; |
| // bit mask for witch BL the configuration should be read |
| volatile uint16_t BLConfig_ReadMask = 0; |
| // buffer for BL Configuration |
| BLConfig_t BLConfig; |
| |
| #define I2C_WriteByte(byte) {TWDR = byte; TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);} |
| #define I2C_ReceiveByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE) | (1<<TWEA);} |
| #define I2C_ReceiveLastByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);} |
| |
| #define SCL_CLOCK 200000L |
| #define I2C_TIMEOUT 30000 |
| #define TWI_BASE_ADDRESS 0x52 |
| |
| /**************************************************/ |
| /* Initialize I2C (TWI) */ |
| /**************************************************/ |
| |
| void I2C_Init(char clear) |
| { |
| uint8_t i; |
| uint8_t sreg = SREG; |
| cli(); |
| |
| // SDA is INPUT |
| DDRC &= ~(1<<DDC1); |
| // SCL is output |
| DDRC |= (1<<DDC0); |
| // pull up SDA |
| PORTC |= (1<<PORTC0)|(1<<PORTC1); |
| |
| // TWI Status Register |
| // prescaler 1 (TWPS1 = 0, TWPS0 = 0) |
| TWSR &= ~((1<<TWPS1)|(1<<TWPS0)); |
| |
| // set TWI Bit Rate Register |
| TWBR = ((F_CPU/SCL_CLOCK)-16)/2; |
| |
| twi_state = TWI_STATE_MOTOR_TX; |
| motor_write = 0; |
| motor_read = 0; |
| |
| if(clear) for(i=0; i < MAX_MOTORS; i++) |
| { |
| Motor[i].Version = 0; |
| Motor[i].SetPoint = 0; |
| Motor[i].SetPointLowerBits = 0; |
| Motor[i].State = 0; |
| Motor[i].ReadMode = BL_READMODE_STATUS; |
| Motor[i].Current = 0; |
| Motor[i].MaxPWM = 0; |
| Motor[i].Temperature = 0; |
| } |
| sei(); |
| SREG = sreg; |
| } |
| |
| void I2C_Reset(void) |
| { |
| // stop i2c bus |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| TWCR = (1<<TWINT); // reset to original state incl. interrupt flag reset |
| TWAMR = 0; |
| TWAR = 0; |
| TWDR = 0; |
| TWSR = 0; |
| TWBR = 0; |
| I2C_TransferActive = 0; |
| I2C_Init(0); |
| I2C_WriteByte(0); |
| BLFlags |= BLFLAG_READ_VERSION; |
| } |
| |
| /****************************************/ |
| /* I2C ISR */ |
| /****************************************/ |
| ISR (TWI_vect) |
| { |
| static uint8_t missing_motor = 0, motor_read_temperature = 0; |
| static uint8_t *pBuff = 0; |
| static uint8_t BuffLen = 0; |
| |
| switch (twi_state++) |
| { |
| // Master Transmit |
| case 0: // TWI_STATE_MOTOR_TX |
| I2C_TransferActive = 1; |
| // skip motor if not used in mixer |
| while((Mixer.Motor[motor_write][MIX_GAS] <= 0) && (motor_write < MAX_MOTORS)) motor_write++; |
| if(motor_write >= MAX_MOTORS) // writing finished, read now |
| { |
| BLConfig_WriteMask = 0; // reset configuration bitmask |
| motor_write = 0; // reset motor write counter for next cycle |
| twi_state = TWI_STATE_MOTOR_RX; |
| I2C_WriteByte(TWI_BASE_ADDRESS + TW_READ + (motor_read<<1) ); // select slave address in rx mode |
| } |
| else I2C_WriteByte(TWI_BASE_ADDRESS + TW_WRITE + (motor_write<<1) ); // select slave address in tx mode |
| break; |
| case 1: // Send Data to Slave |
| I2C_WriteByte(Motor[motor_write].SetPoint); // transmit setpoint |
| // if old version has been detected |
| if(!(Motor[motor_write].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) |
| { |
| twi_state = 4; //jump over sending more data |
| } |
| // the new version has been detected |
| else if(!( (Motor[motor_write].SetPointLowerBits && (RequiredMotors < 7)) || BLConfig_WriteMask || BLConfig_ReadMask ) ) |
| { // or LowerBits are zero and no BlConfig should be sent (saves round trip time) |
| twi_state = 4; //jump over sending more data |
| } |
| break; |
| case 2: // lower bits of setpoint (higher resolution) |
| if ((0x0001<<motor_write) & BLConfig_ReadMask) |
| { |
| Motor[motor_write].ReadMode = BL_READMODE_CONFIG; // configuration request |
| } |
| else |
| { |
| Motor[motor_write].ReadMode = BL_READMODE_STATUS; // normal status request |
| } |
| // send read mode and the lower bits of setpoint |
| I2C_WriteByte((Motor[motor_write].ReadMode<<3)|(Motor[motor_write].SetPointLowerBits & 0x07)); |
| // configuration tranmission request? |
| if((0x0001<<motor_write) & BLConfig_WriteMask) |
| { // redirect tx pointer to configuration data |
| pBuff = (uint8_t*)&BLConfig; // select config for motor |
| BuffLen = sizeof(BLConfig_t); |
| } |
| else |
| { // jump to end of transmission for that motor |
| twi_state = 4; |
| } |
| break; |
| case 3: // send configuration |
| I2C_WriteByte(*pBuff); |
| pBuff++; |
| if(--BuffLen > 0) twi_state = 3; // if there are some bytes left |
| break; |
| case 4: // repeat case 0-4 for all motors |
| if(TWSR == TW_MT_DATA_NACK) // Data transmitted, NACK received |
| { |
| if(!missing_motor) missing_motor = motor_write + 1; |
| if((Motor[motor_write].State & MOTOR_STATE_ERROR_MASK) < MOTOR_STATE_ERROR_MASK) Motor[motor_write].State++; // increment error counter and handle overflow |
| } |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| I2CTimeout = 10; |
| motor_write++; // next motor |
| I2C_Start(TWI_STATE_MOTOR_TX); // Repeated start -> switch slave or switch Master Transmit -> Master Receive |
| break; |
| // Master Receive Data |
| case 5: // TWI_STATE_MOTOR_RX |
| if(TWSR != TW_MR_SLA_ACK) // SLA+R transmitted but no ACK received |
| { // no response from the addressed slave received |
| Motor[motor_read].State &= ~MOTOR_STATE_PRESENT_MASK; // clear present bit |
| if(++motor_read >= MAX_MOTORS) |
| { // all motors read |
| motor_read = 0; // restart from beginning |
| BLConfig_ReadMask = 0; // reset read configuration bitmask |
| if(++motor_read_temperature >= MAX_MOTORS) |
| { |
| motor_read_temperature = 0; |
| BLFlags &= ~BLFLAG_READ_VERSION; |
| } |
| } |
| BLFlags |= BLFLAG_TX_COMPLETE; |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| I2C_TransferActive = 0; |
| } |
| else |
| { // motor successfully addressed |
| Motor[motor_read].State |= MOTOR_STATE_PRESENT_MASK; // set present bit |
| if(Motor[motor_read].Version & MOTOR_STATE_NEW_PROTOCOL_MASK) |
| { |
| // new BL found |
| switch(Motor[motor_read].ReadMode) |
| { |
| case BL_READMODE_CONFIG: |
| pBuff = (uint8_t*)&BLConfig; |
| BuffLen = sizeof(BLConfig_t); |
| break; |
| |
| case BL_READMODE_STATUS: |
| pBuff = (uint8_t*)&(Motor[motor_read].Current); |
| if(motor_read == motor_read_temperature) BuffLen = 3; // read Current, MaxPwm & Temp |
| else BuffLen = 1;// read Current only |
| break; |
| } |
| } |
| else // old BL version |
| { |
| pBuff = (uint8_t*)&(Motor[motor_read].Current); |
| if((BLFlags & BLFLAG_READ_VERSION) || (motor_read == motor_read_temperature)) BuffLen = 2; // Current & MaxPwm |
| else BuffLen = 1; // read Current only |
| } |
| if(BuffLen == 1) |
| { |
| I2C_ReceiveLastByte(); // read last byte |
| } |
| else |
| { |
| I2C_ReceiveByte(); // read next byte |
| } |
| } |
| MissingMotor = missing_motor; |
| missing_motor = 0; |
| break; |
| case 6: // receive bytes |
| *pBuff = TWDR; |
| pBuff++; |
| BuffLen--; |
| if(BuffLen>1) |
| { |
| I2C_ReceiveByte(); // read next byte |
| } |
| else if (BuffLen == 1) |
| { |
| I2C_ReceiveLastByte(); // read last byte |
| } |
| else // nothing left |
| { |
| if(BLFlags & BLFLAG_READ_VERSION) |
| { |
| if(!(FC_StatusFlags & FC_STATUS_MOTOR_RUN) && (Motor[motor_read].MaxPWM == 250) ) Motor[motor_read].Version |= MOTOR_STATE_NEW_PROTOCOL_MASK; |
| else Motor[motor_read].Version = 0; |
| } |
| if(++motor_read >= MAX_MOTORS) |
| { |
| motor_read = 0; // restart from beginning |
| BLConfig_ReadMask = 0; // reset read configuration bitmask |
| if(++motor_read_temperature >= MAX_MOTORS) |
| { |
| motor_read_temperature = 0; |
| BLFlags &= ~BLFLAG_READ_VERSION; |
| } |
| } |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| BLFlags |= BLFLAG_TX_COMPLETE; |
| I2C_TransferActive = 0; |
| return; |
| } |
| twi_state = 6; // if there are some bytes left |
| break; |
| |
| // writing Gyro-Offsets |
| case 18: |
| I2C_WriteByte(0x98); // Address the DAC |
| break; |
| |
| case 19: |
| I2C_WriteByte(0x10 + (dac_channel * 2)); // Select DAC Channel (0x10 = A, 0x12 = B, 0x14 = C) |
| break; |
| |
| case 20: |
| switch(dac_channel) |
| { |
| case 0: |
| I2C_WriteByte(AnalogOffsetNick); // 1st byte for Channel A |
| break; |
| case 1: |
| I2C_WriteByte(AnalogOffsetRoll); // 1st byte for Channel B |
| break; |
| case 2: |
| I2C_WriteByte(AnalogOffsetGier); // 1st byte for Channel C |
| break; |
| } |
| break; |
| |
| case 21: |
| I2C_WriteByte(0x80); // 2nd byte for all channels is 0x80 |
| break; |
| |
| case 22: |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| I2C_TransferActive = 0; |
| I2CTimeout = 10; |
| // repeat case 18...22 until all DAC Channels are updated |
| if(dac_channel < 2) |
| { |
| dac_channel ++; // jump to next channel |
| I2C_Start(TWI_STATE_GYRO_OFFSET_TX); // start transmission for next channel |
| } |
| else |
| { |
| dac_channel = 0; // reset dac channel counter |
| BLFlags |= BLFLAG_TX_COMPLETE; |
| } |
| break; |
| default: |
| I2C_Stop(TWI_STATE_MOTOR_TX); |
| BLFlags |= BLFLAG_TX_COMPLETE; |
| I2CTimeout = 10; |
| motor_write = 0; |
| motor_read = 0; |
| I2C_TransferActive = 0; |
| break; |
| } |
| |
| } |
| |
| |
| uint8_t I2C_WriteBLConfig(uint8_t motor) |
| { |
| uint8_t i; |
| uint16_t timer; |
| |
| if(MotorenEin || PC_MotortestActive) return(BLCONFIG_ERR_MOTOR_RUNNING); // not when motors are running! |
| if(motor > MAX_MOTORS) return (BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist! |
| if(motor) |
| { |
| if(!(Motor[motor-1].State & MOTOR_STATE_PRESENT_MASK)) return(BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist! |
| if(!(Motor[motor-1].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) return(BLCONFIG_ERR_HW_NOT_COMPATIBLE); // not a new BL! |
| } |
| // check BL configuration to send |
| if(BLConfig.Revision != BLCONFIG_REVISION) return (BLCONFIG_ERR_SW_NOT_COMPATIBLE); // bad revison |
| i = RAM_Checksum((uint8_t*)&BLConfig, sizeof(BLConfig_t) - 1); |
| if(i != BLConfig.crc) return(BLCONFIG_ERR_CHECKSUM); // bad checksum |
| |
| timer = SetDelay(2000); |
| while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer)); //wait for complete transfer |
| |
| // prepare the bitmask |
| if(!motor) // 0 means all |
| { |
| BLConfig_WriteMask = 0xFF; // all motors at once with the same configuration |
| } |
| else //only one specific motor |
| { |
| BLConfig_WriteMask = 0x0001<<(motor-1); |
| } |
| for(i = 0; i < MAX_MOTORS; i++) |
| { |
| if((0x0001<<i) & BLConfig_WriteMask) |
| { |
| Motor[i].SetPoint = 0; |
| Motor[i].SetPointLowerBits = 0; |
| } |
| } |
| |
| motor_write = 0; |
| // needs at least MAX_MOTORS loops of 2 ms (12*2ms = 24ms) |
| do |
| { |
| I2C_Start(TWI_STATE_MOTOR_TX); // start an i2c transmission |
| while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer)); //wait for complete transfer |
| }while(BLConfig_WriteMask && !CheckDelay(timer)); // repeat until the BL config has been sent |
| if(BLConfig_WriteMask) return(BLCONFIG_ERR_MOTOR_NOT_EXIST); |
| return(BLCONFIG_SUCCESS); |
| } |
| |
| uint8_t I2C_ReadBLConfig(uint8_t motor) |
| { |
| uint8_t i; |
| uint16_t timer; |
| |
| if(MotorenEin || PC_MotortestActive) return(BLCONFIG_ERR_MOTOR_RUNNING); // not when motors are running! |
| if(motor > MAX_MOTORS) return (BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist! |
| if(motor == 0) return (BLCONFIG_ERR_READ_NOT_POSSIBLE); |
| if(!(Motor[motor-1].State & MOTOR_STATE_PRESENT_MASK)) return(BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist! |
| if(!(Motor[motor-1].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) return(BLCONFIG_ERR_HW_NOT_COMPATIBLE); // not a new BL! |
| |
| timer = SetDelay(2000); |
| while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer)); //wait for complete transfer |
| |
| // prepare the bitmask |
| BLConfig_ReadMask = 0x0001<<(motor-1); |
| |
| for(i = 0; i < MAX_MOTORS; i++) |
| { |
| if((0x0001<<i) & BLConfig_ReadMask) |
| { |
| Motor[i].SetPoint = 0; |
| Motor[i].SetPointLowerBits = 0; |
| } |
| } |
| |
| motor_read = 0; |
| BLConfig.Revision = 0; // bad revision |
| BLConfig.crc = 0; // bad checksum |
| // needs at least MAX_MOTORS loops of 2 ms (12*2ms = 24ms) |
| do |
| { |
| I2C_Start(TWI_STATE_MOTOR_TX); // start an i2c transmission |
| while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer)); //wait for complete transfer |
| }while(BLConfig_ReadMask && !CheckDelay(timer)); // repeat until the BL config has been received from all motors |
| // validate result |
| if(BLConfig.Revision != BLCONFIG_REVISION) return (BLCONFIG_ERR_SW_NOT_COMPATIBLE); // bad revison |
| i = RAM_Checksum((uint8_t*)&BLConfig, sizeof(BLConfig_t) - 1); |
| if(i != BLConfig.crc) return(BLCONFIG_ERR_CHECKSUM); // bad checksum |
| return(BLCONFIG_SUCCESS); |
| } |
| |