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BLHeli_S.asm
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BLHeli_S.asm
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$NOMOD51
;**** **** **** **** ****
;
; BLHeli program for controlling brushless motors in multirotors
;
; Copyright 2011, 2012 Steffen Skaug
; This program is distributed under the terms of the GNU General Public License
;
; This file is part of BLHeli.
;
; BLHeli is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; BLHeli is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with BLHeli. If not, see <http://www.gnu.org/licenses/>.
;
;**** **** **** **** ****
;
; This software was initially designed for use with Eflite mCP X, but is now adapted to copters/planes in general
;
; The software was inspired by and started from from Bernard Konze's BLMC: http://home.versanet.de/~bkonze/blc_6a/blc_6a.htm
; And also Simon Kirby's TGY: https://github.com/sim-/tgy
;
; This file is best viewed with tab width set to 5
;
; The code is designed for multirotor applications, running damped light mode
;
; The input signal can be Normal (1-2ms), OneShot125 (125-250us), OneShot42 (41.7-83.3us) or Multishot (5-25us) at rates as high as allowed by the format.
; Three Dshot signal rates are also supported, Dshot150, Dshot300 and Dshot600. A 48MHz MCU is required for Dshot600.
; The code autodetects normal, OneShot125, Oneshot42, Multishot or Dshot.
;
; The first lines of the software must be modified according to the chosen environment:
; ESCNO EQU "ESC"
; MCU_48MHZ EQU "N"
; FETON_DELAY EQU "N"
;
;**** **** **** **** ****
; Revision history:
; - Rev16.0 Started. Built upon rev 14.5 of base code
; Using hardware pwm for very smooth throttle response, silent running and support of very high rpms
; Implemented reverse bidirectional mode
; Implemented separate throttle gains fwd and rev in bidirectional mode
; Implemented support for Oneshot42 and Multishot
; - Rev16.1 Made low rpm power limiting programmable through the startup power parameter
; - Rev16.2 Fixed bug that prevented temperature protection
; Improved robustness to very high input signal rates
; Beeps can be turned off by programming beep strength to 1
; Throttle cal difference is checked to be above required minimum before storing. Throttle cal max is not stored until successful min throttle cal
; - Rev16.3 Implemented programmable temperature protection
; Improved protection of bootloader and generally reduced risk of flash corruption
; Some small changes for improved sync hold
; - Rev16.4 Fixed bug where bootloader operation could be blocked by a defective "eeprom" signature
; - Rev16.5 Added support for DShot150, DShot300 and DShot600
; - Rev16.6 Fixed signal detection issue of multishot at 32kHz
; Improved bidirectional mode for high input signal rates
; - Rev16.7 Addition of Dshot commands for beeps and temporary reverse direction (largely by brycedjohnson)
;
;
;**** **** **** **** ****
; Minimum 8K Bytes of In-System Self-Programmable Flash
; Minimum 512 Bytes Internal SRAM
;
;**** **** **** **** ****
; Master clock is internal 24MHz oscillator (or 48MHz, for which the times below are halved)
; Although 24/48 are used in the code, the exact clock frequencies are 24.5MHz or 49.0 MHz
; Timer 0 (41.67ns counts) always counts up and is used for
; - RC pulse measurement
; Timer 1 (41.67ns counts) always counts up and is used for
; - DShot frame sync detection
; Timer 2 (500ns counts) always counts up and is used for
; - RC pulse timeout counts and commutation times
; Timer 3 (500ns counts) always counts up and is used for
; - Commutation timeouts
; PCA0 (41.67ns counts) always counts up and is used for
; - Hardware PWM generation
;
;**** **** **** **** ****
; Interrupt handling
; The C8051 does not disable interrupts when entering an interrupt routine.
; Also some interrupt flags need to be cleared by software
; The code disables interrupts in some interrupt routines
; - Interrupts are disabled during beeps, to avoid audible interference from interrupts
;
;**** **** **** **** ****
; Motor control:
; - Brushless motor control with 6 states for each electrical 360 degrees
; - An advance timing of 0deg has zero cross 30deg after one commutation and 30deg before the next
; - Timing advance in this implementation is set to 15deg nominally
; - Motor pwm is always damped light (aka complementary pwm, regenerative braking)
; Motor sequence starting from zero crossing:
; - Timer wait: Wt_Comm 15deg ; Time to wait from zero cross to actual commutation
; - Timer wait: Wt_Advance 15deg ; Time to wait for timing advance. Nominal commutation point is after this
; - Timer wait: Wt_Zc_Scan 7.5deg ; Time to wait before looking for zero cross
; - Scan for zero cross 22.5deg ; Nominal, with some motor variations
;
; Motor startup:
; There is a startup phase and an initial run phase, before normal bemf commutation run begins.
;
;**** **** **** **** ****
; List of enumerated supported ESCs
A_ EQU 1 ; X X RC X MC MB MA CC X X Cc Cp Bc Bp Ac Ap
B_ EQU 2 ; X X RC X MC MB MA CC X X Ap Ac Bp Bc Cp Cc
C_ EQU 3 ; Ac Ap MC MB MA CC X RC X X X X Cc Cp Bc Bp
D_ EQU 4 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Com fets inverted
E_ EQU 5 ; L1 L0 RC X MC MB MA CC X L2 Cc Cp Bc Bp Ac Ap A with LEDs
F_ EQU 6 ; X X RC X MA MB MC CC X X Cc Cp Bc Bp Ac Ap
G_ EQU 7 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like D, but noninverted com fets
H_ EQU 8 ; RC X X X MA MB CC MC X Ap Bp Cp X Ac Bc Cc
I_ EQU 9 ; X X RC X MC MB MA CC X X Ac Bc Cc Ap Bp Cp
J_ EQU 10 ; L2 L1 L0 RC CC MB MC MA X X Cc Bc Ac Cp Bp Ap LEDs
K_ EQU 11 ; X X MC X MB CC MA RC X X Ap Bp Cp Cc Bc Ac Com fets inverted
L_ EQU 12 ; X X RC X CC MA MB MC X X Ac Bc Cc Ap Bp Cp
M_ EQU 13 ; MA MC CC MB RC L0 X X X Cc Bc Ac Cp Bp Ap X LED
N_ EQU 14 ; X X RC X MC MB MA CC X X Cp Cc Bp Bc Ap Ac
O_ EQU 15 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like D, but low side pwm
P_ EQU 16 ; X X RC MA CC MB MC X X Cc Bc Ac Cp Bp Ap X
Q_ EQU 17 ; Cp Bp Ap L1 L0 X RC X X MA MB MC CC Cc Bc Ac LEDs
R_ EQU 18 ; X X RC X MC MB MA CC X X Ac Bc Cc Ap Bp Cp
S_ EQU 19 ; X X RC X CC MA MC MB X X Cc Cp Bc Bp Ac Ap Like O, but com fets inverted
T_ EQU 20 ; RC X MA X MB CC MC X X X Cp Bp Ap Ac Bc Cc
U_ EQU 21 ; MA MC CC MB RC L0 L1 L2 X Cc Bc Ac Cp Bp Ap X Like M, but with 3 LEDs
V_ EQU 22 ; Cc X RC X MC CC MB MA X Ap Ac Bp X X Bc Cp
W_ EQU 23 ; RC MC MB X CC MA X X X Ap Bp Cp X X X X Tristate gate driver
;**** **** **** **** ****
; Select the port mapping to use (or unselect all for use with external batch compile file)
;ESCNO EQU A_
;ESCNO EQU B_
;ESCNO EQU C_
;ESCNO EQU D_
;ESCNO EQU E_
;ESCNO EQU F_
;ESCNO EQU G_
;ESCNO EQU H_
;ESCNO EQU I_
;ESCNO EQU J_
;ESCNO EQU K_
;ESCNO EQU L_
;ESCNO EQU M_
;ESCNO EQU N_
;ESCNO EQU O_
;ESCNO EQU P_
;ESCNO EQU Q_
;ESCNO EQU R_
;ESCNO EQU S_
;ESCNO EQU T_
;ESCNO EQU U_
;ESCNO EQU V_
;ESCNO EQU W_
;**** **** **** **** ****
; Select the MCU type (or unselect for use with external batch compile file)
;MCU_48MHZ EQU 0
;**** **** **** **** ****
; Select the fet deadtime (or unselect for use with external batch compile file)
;FETON_DELAY EQU 15 ; 20.4ns per step
$include (Common.inc) ; Include common source code for EFM8BBx based ESCs
;**** **** **** **** ****
; Programming defaults
;
DEFAULT_PGM_STARTUP_PWR EQU 9 ; 1=0.031 2=0.047 3=0.063 4=0.094 5=0.125 6=0.188 7=0.25 8=0.38 9=0.50 10=0.75 11=1.00 12=1.25 13=1.50
DEFAULT_PGM_COMM_TIMING EQU 3 ; 1=Low 2=MediumLow 3=Medium 4=MediumHigh 5=High
DEFAULT_PGM_DEMAG_COMP EQU 2 ; 1=Disabled 2=Low 3=High
DEFAULT_PGM_DIRECTION EQU 1 ; 1=Normal 2=Reversed 3=Bidir 4=Bidir rev
DEFAULT_PGM_BEEP_STRENGTH EQU 40 ; Beep strength
DEFAULT_PGM_BEACON_STRENGTH EQU 80 ; Beacon strength
DEFAULT_PGM_BEACON_DELAY EQU 4 ; 1=1m 2=2m 3=5m 4=10m 5=Infinite
; COMMON
DEFAULT_PGM_ENABLE_TX_PROGRAM EQU 1 ; 1=Enabled 0=Disabled
DEFAULT_PGM_MIN_THROTTLE EQU 37 ; 4*37+1000=1148
DEFAULT_PGM_MAX_THROTTLE EQU 208 ; 4*208+1000=1832
DEFAULT_PGM_CENTER_THROTTLE EQU 122 ; 4*122+1000=1488 (used in bidirectional mode)
DEFAULT_PGM_ENABLE_TEMP_PROT EQU 7 ; 0=Disabled 1=80C 2=90C 3=100C 4=110C 5=120C 6=130C 7=140C
DEFAULT_PGM_ENABLE_POWER_PROT EQU 1 ; 1=Enabled 0=Disabled
DEFAULT_PGM_BRAKE_ON_STOP EQU 0 ; 1=Enabled 0=Disabled
DEFAULT_PGM_LED_CONTROL EQU 0 ; Byte for LED control. 2bits per LED, 0=Off, 1=On
;**** **** **** **** ****
; Temporary register definitions
Temp1 EQU R0
Temp2 EQU R1
Temp3 EQU R2
Temp4 EQU R3
Temp5 EQU R4
Temp6 EQU R5
Temp7 EQU R6
Temp8 EQU R7
;**** **** **** **** ****
; Register definitions
DSEG AT 20h ; Variables segment
Bit_Access: DS 1 ; MUST BE AT THIS ADDRESS. Variable at bit accessible address (for non interrupt routines)
Bit_Access_Int: DS 1 ; Variable at bit accessible address (for interrupts)
Rcp_Outside_Range_Cnt: DS 1 ; RC pulse outside range counter (incrementing)
Rcp_Timeout_Cntd: DS 1 ; RC pulse timeout counter (decrementing)
Flags0: DS 1 ; State flags. Reset upon init_start
T3_PENDING EQU 0 ; Timer 3 pending flag
DEMAG_DETECTED EQU 1 ; Set when excessive demag time is detected
COMP_TIMED_OUT EQU 2 ; Set when comparator reading timed out
; EQU 3
; EQU 4
; EQU 5
; EQU 6
; EQU 7
Flags1: DS 1 ; State flags. Reset upon init_start
STARTUP_PHASE EQU 0 ; Set when in startup phase
INITIAL_RUN_PHASE EQU 1 ; Set when in initial run phase, before synchronized run is achieved
MOTOR_STARTED EQU 2 ; Set when motor is started
DIR_CHANGE_BRAKE EQU 3 ; Set when braking before direction change
HIGH_RPM EQU 4 ; Set when motor rpm is high (Comm_Period4x_H less than 2)
; EQU 5
; EQU 6
; EQU 7
Flags2: DS 1 ; State flags. NOT reset upon init_start
RCP_UPDATED EQU 0 ; New RC pulse length value available
RCP_ONESHOT125 EQU 1 ; RC pulse input is OneShot125 (125-250us)
RCP_ONESHOT42 EQU 2 ; RC pulse input is OneShot42 (41.67-83us)
RCP_MULTISHOT EQU 3 ; RC pulse input is Multishot (5-25us)
RCP_DSHOT EQU 4 ; RC pulse input is digital shot
RCP_DIR_REV EQU 5 ; RC pulse direction in bidirectional mode
RCP_FULL_RANGE EQU 6 ; When set full input signal range is used (1000-2000us) and stored calibration values are ignored
; EQU 7
Flags3: DS 1 ; State flags. NOT reset upon init_start
PGM_DIR_REV EQU 0 ; Programmed direction. 0=normal, 1=reversed
PGM_BIDIR_REV EQU 1 ; Programmed bidirectional direction. 0=normal, 1=reversed
PGM_BIDIR EQU 2 ; Programmed bidirectional operation. 0=normal, 1=bidirectional
SKIP_T2_INT EQU 3 ; Set for 48MHz MCUs when timer 2 interrupt shall be ignored
CLOCK_SET_AT_48MHZ EQU 4 ; Set if 48MHz MCUs run at 48MHz
; EQU 5
; EQU 6
; EQU 7
;**** **** **** **** ****
; RAM definitions
DSEG AT 30h ; Ram data segment, direct addressing
Initial_Arm: DS 1 ; Variable that is set during the first arm sequence after power on
Min_Throttle_L: DS 1 ; Minimum throttle scaled (lo byte)
Min_Throttle_H: DS 1 ; Minimum throttle scaled (hi byte)
Center_Throttle_L: DS 1 ; Center throttle scaled (lo byte)
Center_Throttle_H: DS 1 ; Center throttle scaled (hi byte)
Max_Throttle_L: DS 1 ; Maximum throttle scaled (lo byte)
Max_Throttle_H: DS 1 ; Maximum throttle scaled (hi byte)
Power_On_Wait_Cnt_L: DS 1 ; Power on wait counter (lo byte)
Power_On_Wait_Cnt_H: DS 1 ; Power on wait counter (hi byte)
Startup_Cnt: DS 1 ; Startup phase commutations counter (incrementing)
Startup_Zc_Timeout_Cntd: DS 1 ; Startup zero cross timeout counter (decrementing)
Initial_Run_Rot_Cntd: DS 1 ; Initial run rotations counter (decrementing)
Stall_Cnt: DS 1 ; Counts start/run attempts that resulted in stall. Reset upon a proper stop
Demag_Detected_Metric: DS 1 ; Metric used to gauge demag event frequency
Demag_Pwr_Off_Thresh: DS 1 ; Metric threshold above which power is cut
Low_Rpm_Pwr_Slope: DS 1 ; Sets the slope of power increase for low rpms
Timer0_X: DS 1 ; Timer 0 extended byte
Timer2_X: DS 1 ; Timer 2 extended byte
Prev_Comm_L: DS 1 ; Previous commutation timer 3 timestamp (lo byte)
Prev_Comm_H: DS 1 ; Previous commutation timer 3 timestamp (hi byte)
Prev_Comm_X: DS 1 ; Previous commutation timer 3 timestamp (ext byte)
Prev_Prev_Comm_L: DS 1 ; Pre-previous commutation timer 3 timestamp (lo byte)
Prev_Prev_Comm_H: DS 1 ; Pre-previous commutation timer 3 timestamp (hi byte)
Comm_Period4x_L: DS 1 ; Timer 3 counts between the last 4 commutations (lo byte)
Comm_Period4x_H: DS 1 ; Timer 3 counts between the last 4 commutations (hi byte)
Comparator_Read_Cnt: DS 1 ; Number of comparator reads done
Wt_Adv_Start_L: DS 1 ; Timer 3 start point for commutation advance timing (lo byte)
Wt_Adv_Start_H: DS 1 ; Timer 3 start point for commutation advance timing (hi byte)
Wt_Zc_Scan_Start_L: DS 1 ; Timer 3 start point from commutation to zero cross scan (lo byte)
Wt_Zc_Scan_Start_H: DS 1 ; Timer 3 start point from commutation to zero cross scan (hi byte)
Wt_Zc_Tout_Start_L: DS 1 ; Timer 3 start point for zero cross scan timeout (lo byte)
Wt_Zc_Tout_Start_H: DS 1 ; Timer 3 start point for zero cross scan timeout (hi byte)
Wt_Comm_Start_L: DS 1 ; Timer 3 start point from zero cross to commutation (lo byte)
Wt_Comm_Start_H: DS 1 ; Timer 3 start point from zero cross to commutation (hi byte)
Dshot_Cmd: DS 1 ; Dshot command
Dshot_Cmd_Cnt: DS 1 ; Dshot command count
New_Rcp: DS 1 ; New RC pulse value in pca counts
Rcp_Stop_Cnt: DS 1 ; Counter for RC pulses below stop value
Power_Pwm_Reg_L: DS 1 ; Power pwm register setting (lo byte)
Power_Pwm_Reg_H: DS 1 ; Power pwm register setting (hi byte). 0x3F is minimum power
Damp_Pwm_Reg_L: DS 1 ; Damping pwm register setting (lo byte)
Damp_Pwm_Reg_H: DS 1 ; Damping pwm register setting (hi byte)
Current_Power_Pwm_Reg_H: DS 1 ; Current power pwm register setting that is loaded in the PCA register (hi byte)
Pwm_Limit: DS 1 ; Maximum allowed pwm
Pwm_Limit_By_Rpm: DS 1 ; Maximum allowed pwm for low or high rpms
Pwm_Limit_Beg: DS 1 ; Initial pwm limit
Adc_Conversion_Cnt: DS 1 ; Adc conversion counter
Current_Average_Temp: DS 1 ; Current average temperature (lo byte ADC reading, assuming hi byte is 1)
Throttle_Gain: DS 1 ; Gain to be applied to RCP value
Throttle_Gain_M: DS 1 ; Gain to be applied to RCP value (multiplier 0=1x, 1=2x, 2=4x etc))
Throttle_Gain_BD_Rev: DS 1 ; Gain to be applied to RCP value for reverse direction in bidirectional mode
Throttle_Gain_BD_Rev_M: DS 1 ; Gain to be applied to RCP value for reverse direction in bidirectional mode (multiplier 0=1x, 1=2x, 2=4x etc)
Beep_Strength: DS 1 ; Strength of beeps
Flash_Key_1: DS 1 ; Flash key one
Flash_Key_2: DS 1 ; Flash key two
Temp_Prot_Limit: DS 1 ; Temperature protection limit
DShot_Pwm_Thr: DS 1 ; DShot pulse width threshold value
DShot_Timer_Preset: DS 1 ; DShot timer preset for frame sync detection
DShot_Frame_Start_L: DS 1 ; DShot frame start timestamp (lo byte)
DShot_Frame_Start_H: DS 1 ; DShot frame start timestamp (hi byte)
DShot_Frame_Length_Thr: DS 1 ; DShot frame length criteria (in units of 4 timer 2 ticks)
; Indirect addressing data segment. The variables below must be in this sequence
ISEG AT 080h
_Pgm_Gov_P_Gain: DS 1 ; Programmed governor P gain
_Pgm_Gov_I_Gain: DS 1 ; Programmed governor I gain
_Pgm_Gov_Mode: DS 1 ; Programmed governor mode
_Pgm_Low_Voltage_Lim: DS 1 ; Programmed low voltage limit
_Pgm_Motor_Gain: DS 1 ; Programmed motor gain
_Pgm_Motor_Idle: DS 1 ; Programmed motor idle speed
Pgm_Startup_Pwr: DS 1 ; Programmed startup power
_Pgm_Pwm_Freq: DS 1 ; Programmed pwm frequency
Pgm_Direction: DS 1 ; Programmed rotation direction
Pgm_Input_Pol: DS 1 ; Programmed input pwm polarity
Initialized_L_Dummy: DS 1 ; Place holder
Initialized_H_Dummy: DS 1 ; Place holder
Pgm_Enable_TX_Program: DS 1 ; Programmed enable/disable value for TX programming
_Pgm_Main_Rearm_Start: DS 1 ; Programmed enable/disable re-arming main every start
_Pgm_Gov_Setup_Target: DS 1 ; Programmed main governor setup target
_Pgm_Startup_Rpm: DS 1 ; Programmed startup rpm (unused - place holder)
_Pgm_Startup_Accel: DS 1 ; Programmed startup acceleration (unused - place holder)
_Pgm_Volt_Comp: DS 1 ; Place holder
Pgm_Comm_Timing: DS 1 ; Programmed commutation timing
_Pgm_Damping_Force: DS 1 ; Programmed damping force (unused - place holder)
_Pgm_Gov_Range: DS 1 ; Programmed governor range
_Pgm_Startup_Method: DS 1 ; Programmed startup method (unused - place holder)
Pgm_Min_Throttle: DS 1 ; Programmed throttle minimum
Pgm_Max_Throttle: DS 1 ; Programmed throttle maximum
Pgm_Beep_Strength: DS 1 ; Programmed beep strength
Pgm_Beacon_Strength: DS 1 ; Programmed beacon strength
Pgm_Beacon_Delay: DS 1 ; Programmed beacon delay
_Pgm_Throttle_Rate: DS 1 ; Programmed throttle rate (unused - place holder)
Pgm_Demag_Comp: DS 1 ; Programmed demag compensation
_Pgm_BEC_Voltage_High: DS 1 ; Programmed BEC voltage
Pgm_Center_Throttle: DS 1 ; Programmed throttle center (in bidirectional mode)
_Pgm_Main_Spoolup_Time: DS 1 ; Programmed main spoolup time
Pgm_Enable_Temp_Prot: DS 1 ; Programmed temperature protection enable
Pgm_Enable_Power_Prot: DS 1 ; Programmed low rpm power protection enable
_Pgm_Enable_Pwm_Input: DS 1 ; Programmed PWM input signal enable
_Pgm_Pwm_Dither: DS 1 ; Programmed output PWM dither
Pgm_Brake_On_Stop: DS 1 ; Programmed braking when throttle is zero
Pgm_LED_Control: DS 1 ; Programmed LED control
; The sequence of the variables below is no longer of importance
Pgm_Startup_Pwr_Decoded: DS 1 ; Programmed startup power decoded
; Indirect addressing data segment
ISEG AT 0D0h
Temp_Storage: DS 48 ; Temporary storage
;**** **** **** **** ****
CSEG AT 1A00h ; "Eeprom" segment
EEPROM_FW_MAIN_REVISION EQU 16 ; Main revision of the firmware
EEPROM_FW_SUB_REVISION EQU 7 ; Sub revision of the firmware
EEPROM_LAYOUT_REVISION EQU 33 ; Revision of the EEPROM layout
Eep_FW_Main_Revision: DB EEPROM_FW_MAIN_REVISION ; EEPROM firmware main revision number
Eep_FW_Sub_Revision: DB EEPROM_FW_SUB_REVISION ; EEPROM firmware sub revision number
Eep_Layout_Revision: DB EEPROM_LAYOUT_REVISION ; EEPROM layout revision number
_Eep_Pgm_Gov_P_Gain: DB 0FFh
_Eep_Pgm_Gov_I_Gain: DB 0FFh
_Eep_Pgm_Gov_Mode: DB 0FFh
_Eep_Pgm_Low_Voltage_Lim: DB 0FFh
_Eep_Pgm_Motor_Gain: DB 0FFh
_Eep_Pgm_Motor_Idle: DB 0FFh
Eep_Pgm_Startup_Pwr: DB DEFAULT_PGM_STARTUP_PWR ; EEPROM copy of programmed startup power
_Eep_Pgm_Pwm_Freq: DB 0FFh
Eep_Pgm_Direction: DB DEFAULT_PGM_DIRECTION ; EEPROM copy of programmed rotation direction
_Eep_Pgm_Input_Pol: DB 0FFh
Eep_Initialized_L: DB 055h ; EEPROM initialized signature low byte
Eep_Initialized_H: DB 0AAh ; EEPROM initialized signature high byte
Eep_Enable_TX_Program: DB DEFAULT_PGM_ENABLE_TX_PROGRAM ; EEPROM TX programming enable
_Eep_Main_Rearm_Start: DB 0FFh
_Eep_Pgm_Gov_Setup_Target: DB 0FFh
_Eep_Pgm_Startup_Rpm: DB 0FFh
_Eep_Pgm_Startup_Accel: DB 0FFh
_Eep_Pgm_Volt_Comp: DB 0FFh
Eep_Pgm_Comm_Timing: DB DEFAULT_PGM_COMM_TIMING ; EEPROM copy of programmed commutation timing
_Eep_Pgm_Damping_Force: DB 0FFh
_Eep_Pgm_Gov_Range: DB 0FFh
_Eep_Pgm_Startup_Method: DB 0FFh
Eep_Pgm_Min_Throttle: DB DEFAULT_PGM_MIN_THROTTLE ; EEPROM copy of programmed minimum throttle
Eep_Pgm_Max_Throttle: DB DEFAULT_PGM_MAX_THROTTLE ; EEPROM copy of programmed minimum throttle
Eep_Pgm_Beep_Strength: DB DEFAULT_PGM_BEEP_STRENGTH ; EEPROM copy of programmed beep strength
Eep_Pgm_Beacon_Strength: DB DEFAULT_PGM_BEACON_STRENGTH ; EEPROM copy of programmed beacon strength
Eep_Pgm_Beacon_Delay: DB DEFAULT_PGM_BEACON_DELAY ; EEPROM copy of programmed beacon delay
_Eep_Pgm_Throttle_Rate: DB 0FFh
Eep_Pgm_Demag_Comp: DB DEFAULT_PGM_DEMAG_COMP ; EEPROM copy of programmed demag compensation
_Eep_Pgm_BEC_Voltage_High: DB 0FFh
Eep_Pgm_Center_Throttle: DB DEFAULT_PGM_CENTER_THROTTLE ; EEPROM copy of programmed center throttle
_Eep_Pgm_Main_Spoolup_Time: DB 0FFh
Eep_Pgm_Temp_Prot_Enable: DB DEFAULT_PGM_ENABLE_TEMP_PROT ; EEPROM copy of programmed temperature protection enable
Eep_Pgm_Enable_Power_Prot: DB DEFAULT_PGM_ENABLE_POWER_PROT ; EEPROM copy of programmed low rpm power protection enable
_Eep_Pgm_Enable_Pwm_Input: DB 0FFh
_Eep_Pgm_Pwm_Dither: DB 0FFh
Eep_Pgm_Brake_On_Stop: DB DEFAULT_PGM_BRAKE_ON_STOP ; EEPROM copy of programmed braking when throttle is zero
Eep_Pgm_LED_Control: DB DEFAULT_PGM_LED_CONTROL ; EEPROM copy of programmed LED control
Eep_Dummy: DB 0FFh ; EEPROM address for safety reason
CSEG AT 1A60h
Eep_Name: DB " " ; Name tag (16 Bytes)
;**** **** **** **** ****
Interrupt_Table_Definition ; SiLabs interrupts
CSEG AT 80h ; Code segment after interrupt vectors
;**** **** **** **** ****
; Table definitions
STARTUP_POWER_TABLE: DB 04h, 06h, 08h, 0Ch, 10h, 18h, 20h, 30h, 40h, 60h, 80h, 0A0h, 0C0h
;**** **** **** **** **** **** **** **** **** **** **** **** ****
;
; Timer 0 interrupt routine
;
; No assumptions
;
;**** **** **** **** **** **** **** **** **** **** **** **** ****
IF MCU_48MHZ == 1
t0_int:
inc Timer0_X
reti
ENDIF
;**** **** **** **** **** **** **** **** **** **** **** **** ****
;
; Timer 1 interrupt routine
;
; No assumptions
;
;**** **** **** **** **** **** **** **** **** **** **** **** ****
t1_int:
clr IE_EA
clr IE_EX0 ; Disable int0 interrupts
anl EIE1, #0EFh ; Disable pca interrupts
clr TCON_TR1 ; Stop timer 1
mov TL1, DShot_Timer_Preset ; Reset sync timer
push PSW
setb PSW.3 ; Select register bank 1 for this interrupt
push ACC
push B ; Will be pop'ed by int0 exit
clr TMR2CN0_TR2 ; Timer 2 disabled
mov Temp1, TMR2L ; Read timer value
mov Temp2, TMR2H
setb TMR2CN0_TR2 ; Timer 2 enabled
setb IE_EA
; Reset timer 0
mov TL0, #0
; Check frame time length
clr C
mov A, Temp1
subb A, DShot_Frame_Start_L
mov Temp1, A
mov A, Temp2
subb A, DShot_Frame_Start_H
mov Temp2, A
; Divide by 2 (or 4 for 48MHz). Unit is then us
clr C
mov A, Temp2
rrc A
mov Temp2, A
mov A, Temp1
rrc A
mov Temp1, A
mov A, Temp2
jnz t1_int_frame_fail ; Frame too long
mov A, Temp1
subb A, DShot_Frame_Length_Thr
jc t1_int_frame_fail ; Frame too short
subb A, DShot_Frame_Length_Thr
jnc t1_int_frame_fail ; Frame too long
; Check that correct number of pulses is received
mov A, DPL ; Read current pointer
cjne A, #16, t1_int_frame_fail
; Decode transmitted data
mov Temp5, #0 ; Reset timestamp
mov DPTR, #0 ; Set pointer
mov Temp1, DShot_Pwm_Thr ; DShot pulse width criteria
; Decode DShot data Msb. Use more code space to save time (by not using loop)
Decode_DShot_2Bit Temp4, t1_int_frame_fail
Decode_DShot_2Bit Temp4, t1_int_frame_fail
ajmp t1_int_decode_lsb
t1_int_frame_fail:
mov DPTR, #0 ; Set pointer to start
setb IE_EX0 ; Enable int0 interrupts
setb IE_EX1 ; Enable int1 interrupts
ajmp int0_int_outside_range
t1_int_decode_lsb:
; Decode DShot data Lsb
Decode_DShot_2Bit Temp3, t1_int_decode_fail
Decode_DShot_2Bit Temp3, t1_int_decode_fail
Decode_DShot_2Bit Temp3, t1_int_decode_fail
Decode_DShot_2Bit Temp3, t1_int_decode_fail
ajmp t1_int_decode_checksum
t1_int_decode_fail:
mov DPTR, #0 ; Set pointer to start
setb IE_EX0 ; Enable int0 interrupts
setb IE_EX1 ; Enable int1 interrupts
ajmp int0_int_outside_range
t1_int_decode_checksum:
; Decode DShot data checksum
Decode_DShot_2Bit Temp2, t1_int_decode_fail
Decode_DShot_2Bit Temp2, t1_int_decode_fail
; XOR check (in inverted data, which is ok)
mov A, Temp3
swap A
xrl A, Temp3
xrl A, Temp4
xrl A, Temp2
anl A, #0Fh
jnz t1_int_decode_fail ; XOR check
; Invert DShot data
mov A, Temp4
cpl A
anl A, #0Fh
mov Temp4, A
mov A, Temp3
cpl A
mov Temp3, A
; Subtract 96 (still 12 bits)
clr C
mov A, Temp3
mov Temp2, A
subb A, #96
mov Temp3, A
mov A, Temp4
subb A, #0
mov Temp4, A
jnc t1_normal_range
mov A, Temp2 ; Check for 0 or dshot command
mov Temp4, #0
mov Temp3, #0
jz t1_normal_range
mov Temp2, #0
clr C ; We are in the special dshot range
rrc A ; Divide by 2
jnc t1_dshot_set_cmd ; Check for tlm bit set (if not telemetry, Temp2 will be zero and result in invalid command)
mov Temp2, A
cjne A, Dshot_Cmd, t1_dshot_set_cmd
inc Dshot_Cmd_Cnt
jmp t1_normal_range
t1_dshot_set_cmd:
mov Dshot_Cmd, Temp2
mov Dshot_Cmd_Cnt, #0
t1_normal_range:
; Check for bidirectional operation (0=stop, 96-2095->fwd, 2096-4095->rev)
jnb Flags3.PGM_BIDIR, t1_int_not_bidir ; If not bidirectional operation - branch
; Subtract 2000 (still 12 bits)
clr C
mov A, Temp3
subb A, #0D0h
mov Temp1, A
mov A, Temp4
subb A, #07h
mov Temp2, A
jc t1_int_bidir_fwd ; If result is negative - branch
mov A, Temp1
mov Temp3, A
mov A, Temp2
mov Temp4, A
jb Flags2.RCP_DIR_REV, t1_int_bidir_rev_chk ; If same direction - branch
setb Flags2.RCP_DIR_REV
ajmp t1_int_bidir_rev_chk
t1_int_bidir_fwd:
jnb Flags2.RCP_DIR_REV, t1_int_bidir_rev_chk ; If same direction - branch
clr Flags2.RCP_DIR_REV
t1_int_bidir_rev_chk:
jb Flags3.PGM_BIDIR_REV, ($+5)
cpl Flags2.RCP_DIR_REV
clr C ; Multiply throttle value by 2
mov A, Temp3
rlc A
mov Temp3, A
mov A, Temp4
rlc A
mov Temp4, A
t1_int_not_bidir:
; Generate 4/256
mov A, Temp4
add A, Temp4
addc A, Temp4
addc A, Temp4
mov Temp2, A
; Align to 11 bits
clr C
mov A, Temp4
rrc A
mov Temp4, A
mov A, Temp3
rrc A
mov Temp3, A
; Scale from 2000 to 2048
mov A, Temp3
add A, Temp2 ; Holds 4/128
mov Temp3, A
mov A, Temp4
addc A, #0
mov Temp4, A
jnb ACC.3, ($+7)
mov Temp3, #0FFh
mov Temp4, #0FFh
; Boost pwm during direct start
mov A, Flags1
anl A, #((1 SHL STARTUP_PHASE)+(1 SHL INITIAL_RUN_PHASE))
jz t1_int_startup_boosted
jb Flags1.MOTOR_STARTED, t1_int_startup_boosted ; Do not boost when changing direction in bidirectional mode
mov A, Pwm_Limit_Beg ; Set 25% of max startup power as minimum power
rlc A
mov Temp2, A
mov A, Temp4
jnz t1_int_startup_boost_stall
clr C
mov A, Temp2
subb A, Temp3
jc t1_int_startup_boost_stall
mov A, Temp2
mov Temp3, A
t1_int_startup_boost_stall:
mov A, Stall_Cnt ; Add an extra power boost during start
swap A
rlc A
add A, Temp3
mov Temp3, A
mov A, Temp4
addc A, #0
mov Temp4, A
t1_int_startup_boosted:
; Set 8bit value
clr C
mov A, Temp3
rlc A
swap A
anl A, #0Fh
mov Temp1, A
mov A, Temp4
rlc A
swap A
anl A, #0F0h
orl A, Temp1
mov Temp1, A
jnz t1_int_zero_rcp_checked ; New_Rcp (Temp1) is only zero if all 11 bits are zero
mov A, Temp3
jz t1_int_zero_rcp_checked
mov Temp1, #1
t1_int_zero_rcp_checked:
; Align to 10 bits for 24MHz MCU
IF MCU_48MHZ == 0
clr C
mov A, Temp4
rrc A
mov Temp4, A
mov A, Temp3
rrc A
mov Temp3, A
ENDIF
mov DPTR, #0 ; Set pointer to start
setb IE_EX0 ; Enable int0 interrupts
setb IE_EX1 ; Enable int1 interrupts
; Decrement outside range counter
mov A, Rcp_Outside_Range_Cnt
jz ($+4)
dec Rcp_Outside_Range_Cnt
ajmp int0_int_pulse_ready
;**** **** **** **** **** **** **** **** **** **** **** **** ****
;
; Timer 2 interrupt routine
;
; No assumptions
; Requirements: Temp variables can NOT be used since PSW.x is not set
;
;**** **** **** **** **** **** **** **** **** **** **** **** ****
t2_int: ; Happens every 32ms
push PSW ; Preserve registers through interrupt
push ACC
clr TMR2CN0_TF2H ; Clear interrupt flag
inc Timer2_X
IF MCU_48MHZ == 1
jnb Flags3.CLOCK_SET_AT_48MHZ, t2_int_start
; Check skip variable
jnb Flags3.SKIP_T2_INT, t2_int_start ; Execute this interrupt
clr Flags3.SKIP_T2_INT
ajmp t2_int_exit
t2_int_start:
setb Flags3.SKIP_T2_INT ; Skip next interrupt
ENDIF
; Update RC pulse timeout counter
mov A, Rcp_Timeout_Cntd ; RC pulse timeout count zero?
jz ($+4) ; Yes - do not decrement
dec Rcp_Timeout_Cntd ; No decrement
; Check RC pulse against stop value
clr C
mov A, New_Rcp ; Load new pulse value
jz t2_int_rcp_stop ; Check if pulse is below stop value
; RC pulse higher than stop value, reset stop counter
mov Rcp_Stop_Cnt, #0 ; Reset rcp stop counter
ajmp t2_int_exit
t2_int_rcp_stop:
; RC pulse less than stop value
mov A, Rcp_Stop_Cnt ; Increment stop counter
add A, #1
mov Rcp_Stop_Cnt, A
jnc ($+5) ; Branch if counter has not wrapped
mov Rcp_Stop_Cnt, #0FFh ; Set stop counter to max
t2_int_exit:
pop ACC ; Restore preserved registers
pop PSW
reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****
;
; Timer 3 interrupt routine
;
; No assumptions
; Requirements: Temp variables can NOT be used since PSW.x is not set
; ACC can not be used, as it is not pushed to stack
;
;**** **** **** **** **** **** **** **** **** **** **** **** ****
t3_int: ; Used for commutation timing
clr IE_EA ; Disable all interrupts
anl EIE1, #7Fh ; Disable timer 3 interrupts
mov TMR3RLL, #0FAh ; Set a short delay before next interrupt
mov TMR3RLH, #0FFh
clr Flags0.T3_PENDING ; Flag that timer has wrapped
anl TMR3CN0, #07Fh ; Timer 3 interrupt flag cleared
setb IE_EA ; Enable all interrupts
reti
;**** **** **** **** **** **** **** **** **** **** **** **** ****
;
; Int0 interrupt routine
;
; No assumptions
;
;**** **** **** **** **** **** **** **** **** **** **** **** ****
int0_int: ; Used for RC pulse timing
push ACC
mov A, TL0 ; Read pwm for DShot immediately
; Test for DShot
jnb Flags2.RCP_DSHOT, int0_int_not_dshot
mov TL1, DShot_Timer_Preset ; Reset sync timer
movx @DPTR, A ; Store pwm
inc DPTR
pop ACC
reti
; Not DShot
int0_int_not_dshot:
pop ACC
clr IE_EA
anl EIE1, #0EFh ; Disable pca interrupts
push PSW ; Preserve registers through interrupt
push ACC
push B
setb PSW.3 ; Select register bank 1 for this interrupt
setb IE_EA
; Get the counter values
Get_Rcp_Capture_Values
; Scale down to 10 bits (for 24MHz, and 11 bits for 48MHz)
jnb Flags2.RCP_MULTISHOT, int0_int_fall_not_multishot
; Multishot - Multiply by 2 and add 1/16 and 1/32
mov A, Temp1 ; Divide by 16
swap A
anl A, #0Fh
mov Temp3, A
mov A, Temp2
swap A
anl A, #0F0h
orl A, Temp3
mov Temp3, A
clr C ; Make divided by 32
rrc A
add A, Temp3 ; Add 1/16 to 1/32
mov Temp3, A
clr C ; Multiply by 2
mov A, Temp1
rlc A
mov Temp1, A
mov A, Temp2
rlc A
mov Temp2, A
mov A, Temp1 ; Add 1/16 and 1/32
add A, Temp3
mov Temp3, A
mov A, Temp2
IF MCU_48MHZ == 0
addc A, #03h ; Add to low end, to make signal look like 20-40us
ELSE
addc A, #06h
ENDIF
mov Temp4, A
ajmp int0_int_fall_gain_done
int0_int_fall_not_multishot:
jnb Flags2.RCP_ONESHOT42, int0_int_fall_not_oneshot_42
; Oneshot42 - Add 2/256
clr C
mov A, Temp1
rlc A
mov A, Temp2
rlc A
mov Temp3, A
mov A, Temp1
add A, Temp3
mov Temp3, A
mov A, Temp2
addc A, #0
mov Temp4, A
ajmp int0_int_fall_gain_done
int0_int_fall_not_oneshot_42:
jnb Flags2.RCP_ONESHOT125, int0_int_fall_not_oneshot_125
; Oneshot125 - multiply by 86/256
mov A, Temp1 ; Multiply by 86 and divide by 256
mov B, #56h
mul AB
mov Temp3, B
mov A, Temp2
mov B, #56h
mul AB
add A, Temp3
mov Temp3, A
xch A, B
addc A, #0
mov Temp4, A
ajmp int0_int_fall_gain_done
int0_int_fall_not_oneshot_125:
; Regular signal - multiply by 43/1024
IF MCU_48MHZ == 1
clr C
mov A, Temp3 ; Divide by 2
rrc A
mov Temp3, A
mov A, Temp2
rrc A
mov Temp2, A
mov A, Temp1
rrc A
mov Temp1, A
ENDIF
mov A, Temp1 ; Multiply by 43 and divide by 1024
IF MCU_48MHZ == 0
mov B, #2Bh
ELSE
mov B, #56h ; Multiply by 86
ENDIF
mul AB
mov Temp3, B
mov A, Temp2
IF MCU_48MHZ == 0
mov B, #2Bh
ELSE
mov B, #56h ; Multiply by 86
ENDIF
mul AB
add A, Temp3
mov Temp3, A
xch A, B
addc A, #0
clr C
rrc A ; Divide by 2 for total 512
mov Temp4, A
mov A, Temp3
rrc A
mov Temp3, A
clr C
mov A, Temp4 ; Divide by 2 for total 1024
rrc A
mov Temp4, A
mov A, Temp3
rrc A
mov Temp3, A
int0_int_fall_gain_done:
; Check if 2235us or above (in order to ignore false pulses)
clr C
mov A, Temp4 ; Is pulse 2235us or higher?
IF MCU_48MHZ == 0
subb A, #09h
ELSE
subb A, #12h
ENDIF
jnc int0_int_outside_range ; Yes - ignore pulse
; Check if below 900us (in order to ignore false pulses)
clr C
mov A, Temp3
IF MCU_48MHZ == 0
subb A, #9Ah
ELSE
subb A, #34h
ENDIF
mov A, Temp4
IF MCU_48MHZ == 0
subb A, #03h
ELSE
subb A, #07h
ENDIF
jnc int0_int_check_full_range ; No - proceed
int0_int_outside_range:
inc Rcp_Outside_Range_Cnt
mov A, Rcp_Outside_Range_Cnt
jnz ($+4)
dec Rcp_Outside_Range_Cnt