void output_servo_ppm(void) { uint32_t temp; uint8_t i; // Scale servo from 2500~5000 to 1000~2000 for (i = 0; i < MAX_OUTPUTS; i++) { temp = ServoOut[i]; // Promote to 32 bits temp = ((temp << 2) + 5) / 10; // Round and convert ServoOut[i] = (uint16_t)temp; } // Suppress outputs during throttle high error if((General_error & (1 << THROTTLE_HIGH)) == 0) { // Create unsynchronised output pulses if needed if ((Flight_flags & (1 << Failsafe)) || (Config.CamStab == ON)) { cli(); output_servo_ppm_asm(&ServoOut[0]); sei(); } // Create synchronised output pulses if in sync with RC inputs else { // Pass address of ServoOut array output_servo_ppm_asm(&ServoOut[0]); } } }
void init(void) { uint8_t i; bool updated; //*********************************************************** // I/O setup //*********************************************************** // Set port directions DDRA = 0x30; // Port A DDRB = 0x0A; // Port B DDRC = 0xFC; // Port C DDRD = 0xF2; // Port D // Hold all PWM outputs low to stop glitches // M5 and M6 are on PortA for KK2.1 MOTORS = 0; M5 = 0; M6 = 0; // Preset I/O pins LED1 = 0; // LED1 off LVA = 0; // LVA alarm OFF LCD_SCL = 1; // GLCD clock high // Set/clear pull-ups (1 = set, 0 = clear) PINB = 0xF5; // Set PB pull-ups PIND = 0x0C; // Set PD pull-ups (Don't pull up RX yet) //*********************************************************** // Spektrum receiver binding. Must be done immediately on power-up // // 3 low pulses: DSM2 1024/22ms // 5 low pulses: DSM2 2048/11ms // 7 low pulses: DSMX 1024/22ms // 9 low pulses: DSMX 2048/11ms //*********************************************************** PIND = 0x0C; // Release RX pull up on PD0 _delay_ms(63); // Pause while satellite wakes up // and pull-ups have time to rise. // Tweak until bind pulses about 68ms after power-up // Bind as master if any single button pressed. // NB: Have to wait until the button pull-ups rise before testing for a button press. // Button 1 if ((PINB & 0xf0) == 0x70) { DDRD = 0xF3; // Switch PD0 to output bind_master(3); } // Button 2 if ((PINB & 0xf0) == 0xb0) { DDRD = 0xF3; // Switch PD0 to output bind_master(5); } // Button 3 if ((PINB & 0xf0) == 0xd0) { DDRD = 0xF3; // Switch PD0 to output bind_master(7); } // Button 4 if ((PINB & 0xf0) == 0xE0) { DDRD = 0xF3; // Switch PD0 to output bind_master(9); } DDRD = 0xF2; // Reset Port D directions PIND = 0x0D; // Set PD pull-ups (now pull up RX as well) //*********************************************************** // Timers //*********************************************************** // Timer0 (8bit) - run @ 20MHz / 1024 = 19.531kHz or 51.2us - max 13.1ms // Slow timer to extend Timer 1 TCCR0A = 0; // Normal operation TCCR0B = 0x05; // Clk / 1024 = 19.531kHz or 51.2us - max 13.1ms TIMSK0 |= (1 << TOIE0); // Enable interrupts TCNT0 = 0; // Reset counter // Timer1 (16bit) - run @ 2.5MHz (400ns) - max 26.2ms // Used to measure Rx Signals & control ESC/servo output rate TCCR1A = 0; TCCR1B |= (1 << CS11); // Clk/8 = 2.5MHz // Timer2 8bit - run @ 20MHz / 1024 = 19.531kHz or 51.2us - max 13.1ms // Used to time arm/disarm intervals TCCR2A = 0; TCCR2B = 0x07; // Clk/1024 = 19.531kHz TIMSK2 = 0; TIFR2 = 0; TCNT2 = 0; // Reset counter //*********************************************************** // Interrupts and pin function setup //*********************************************************** // Pin change interrupt enables PCINT1, PCINT2 and PCINT3 (Throttle, AUX and CPPM input) PCICR = 0x0A; // PCINT8 to PCINT15 (PCINT1 group - AUX) // PCINT24 to PCINT31 (PCINT3 group - THR) PCIFR = 0x0F; // Clear PCIF0 interrupt flag // Clear PCIF1 interrupt flag // Clear PCIF2 interrupt flag // Clear PCIF3 interrupt flag // External interrupts INT0 (Elevator) and INT1 (Aileron) and INT2 (Rudder) EICRA = 0x15; // Any change INT0 // Any change INT1 // Any change INT2 EIFR = 0x07; // Clear INT0 interrupt flag (Elevator) // Clear INT1 interrupt flag (Aileron) // Clear INT2 interrupt flag (Rudder/CPPM) //*********************************************************** // Start up //*********************************************************** // Preset important flags Interrupted = false; // Load EEPROM settings updated = Initial_EEPROM_Config_Load(); // Config now contains valid values //*********************************************************** // RX channel defaults for when no RC connected // Not doing this can result in the FC trying (unsuccessfully) to arm // and makes entry into the menus very hard //*********************************************************** for (i = 0; i < MAX_RC_CHANNELS; i++) { RxChannel[i] = 3750; } RxChannel[THROTTLE] = 2500; // Min throttle //*********************************************************** // GLCD initialisation //*********************************************************** // Initialise the GLCD st7565_init(); // Make sure the LCD is blank without clearing buffer (and so no logo) clear_screen(); //*********************************************************** // ESC calibration //*********************************************************** // Calibrate ESCs if ONLY buttons 1 and 4 pressed if ((PINB & 0xf0) == 0x60) { // Display calibrating message st7565_command(CMD_SET_COM_NORMAL); // For text (not for logo) clear_buffer(buffer); LCD_Display_Text(59,(const unsigned char*)Verdana14,10,25); write_buffer(buffer); clear_buffer(buffer); // For each output for (i = 0; i < MAX_OUTPUTS; i++) { // Check for motor marker if (Config.Channel[i].Motor_marker == MOTOR) { // Set output to maximum pulse width ServoOut[i] = MOTOR_100; } else { ServoOut[i] = SERVO_CENTER; } } // Output HIGH pulse (1.9ms) until buttons released while ((PINB & 0xf0) == 0x60) { // Pass address of ServoOut array and select all outputs output_servo_ppm_asm(&ServoOut[0], 0xFF); // Loop rate = 20ms (50Hz) _delay_ms(20); } // Output LOW pulse (1.1ms) after buttons released // For each output for (i = 0; i < MAX_OUTPUTS; i++) { // Check for motor marker if (Config.Channel[i].Motor_marker == MOTOR) { // Set output to maximum pulse width ServoOut[i] = MOTOR_0; } } // Loop forever here while(1) { // Pass address of ServoOut array and select all outputs output_servo_ppm_asm(&ServoOut[0], 0xFF); // Loop rate = 20ms (50Hz) _delay_ms(20); } } //*********************************************************** // Reset EEPROM settings //*********************************************************** // This delay prevents the GLCD flashing up a ghost image of old data _delay_ms(300); // Reload default eeprom settings if middle two buttons are pressed if ((PINB & 0xf0) == 0x90) { // Display reset message st7565_command(CMD_SET_COM_NORMAL); // For text (not for logo) clear_buffer(buffer); LCD_Display_Text(262,(const unsigned char*)Verdana14,40,25); // "Reset" write_buffer(buffer); clear_buffer(buffer); // Reset EEPROM settings Set_EEPROM_Default_Config(); Save_Config_to_EEPROM(); // Set contrast to the default value st7565_set_brightness(Config.Contrast); _delay_ms(500); // Save is now too fast to show the "Reset" text long enough } // Display message in place of logo when updating eeprom structure if (updated) { st7565_command(CMD_SET_COM_NORMAL); // For text (not for logo) clear_buffer(buffer); LCD_Display_Text(259,(const unsigned char*)Verdana14,30,13); // "Updating" LCD_Display_Text(260,(const unsigned char*)Verdana14,33,37); // "settings" write_buffer(buffer); clear_buffer(buffer); _delay_ms(1000); } else { // Write logo from buffer write_buffer(buffer); _delay_ms(1000); } clear_buffer(buffer); write_buffer(buffer); st7565_init(); // Seems necessary for KK2 mini //*********************************************************** // i2c init //*********************************************************** i2c_init(); init_i2c_gyros(); init_i2c_accs(); //*********************************************************** // Remaining init tasks //*********************************************************** // Display "Hold steady" message clear_buffer(buffer); st7565_command(CMD_SET_COM_NORMAL); // For text (not for logo) LCD_Display_Text(263,(const unsigned char*)Verdana14,18,25); // "Hold steady" write_buffer(buffer); clear_buffer(buffer); // Do startup tasks Init_ADC(); init_int(); // Initialise interrupts based on RC input mode init_uart(); // Initialise UART // Initial gyro calibration if (!CalibrateGyrosSlow()) { clear_buffer(buffer); LCD_Display_Text(61,(const unsigned char*)Verdana14,25,25); // "Cal. failed" write_buffer(buffer); _delay_ms(1000); // Reset cli(); wdt_enable(WDTO_15MS); // Watchdog on, 15ms while(1); // Wait for reboot } // Update voltage detection SystemVoltage = GetVbat(); // Check power-up battery voltage UpdateLimits(); // Update travel and trigger limits // Disarm on start-up if Armed setting is ARMABLE if (Config.ArmMode == ARMABLE) { General_error |= (1 << DISARMED); // Set disarmed bit } // Check to see that throttle is low if RC detected if (Interrupted) { RxGetChannels(); if (MonopolarThrottle > THROTTLEIDLE) // THROTTLEIDLE = 50 { General_error |= (1 << THROTTLE_HIGH); // Set throttle high error bit } } // Reset IMU reset_IMU(); // Beep that init is complete LVA = 1; _delay_ms(25); LVA = 0; #ifdef ERROR_LOG // Log reboot add_log(REBOOT); #endif } // init()