mirror of
https://github.com/semerad/gt3b.git
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99 lines
2.8 KiB
Plaintext
99 lines
2.8 KiB
Plaintext
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This is alternative firmware for model radio FlySky FS-TH9X and clones.
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This software comes with absolutely NO-WARRANTY.
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It is programmed with using possibilities of hardware, using timers,
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interrupts and cooperative multitasking (this is because it is much
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simplier to program it then).
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It was written for Cosmic C compiler and will need changes to support
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other compilers.
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There are 2 interrupts used:
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ppm_interrupt
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- timer3 update interrupt
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- sets values for next servo channel to timer
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- wakeups task CALC during SYNC signal
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timer_interrupt
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- timer2 overflow
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- every 5ms
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- increments time from start
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- count LCD blink time and wakeups task LCD
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- handles buzzer
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- wakeups task INPUT
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- handles task MENU delay and wakeups this task
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There are 4 tasks:
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LCD
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- is doing actual write to LCD controller
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- is waked up by lcd_update(), lcd_clear()
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- is waked up from timer to do automatic blinking
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INPUT
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- is doing reading of ADC values and key matrix
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- is waked up from timer every 5ms
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CALC
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- is computing values for each servo and sync signal
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- is waked up from ppm interrupt during sync signal generation
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- also nedded to wakeup after changing number of PPM channels in MENU
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MENU
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- is main program handling keys, menus, lcd
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- is waked up from timer when menu_delay expired
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- is waked up from INPUT task when
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- buttons state changed
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- MENU task wanted ADC values (for calibrate) or battery voltage
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- status of battery low changed
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Files:
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stm8.h - macros for STM8 handling
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gt3b.h - global common values
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vector.c,h - table of interrupt vectors
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task.c,h - cooperative multitasking
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buzzer.c,h - buzzer
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eeprom.c,h - eeprom read/write
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timer.c,h - timer 5ms
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input.c,h - INPUT task, reading ADC and keys
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lcd.c,h - LCD task, writing to LCD controller, blinking
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ppm.c,h - generating of PPM signal
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main.c,h - initialize all and call MENU task
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config.c,h - global and model configuration
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menu.c,h - MENU task, handling keys, menus, lcd
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menu_global.c - global config menus are here
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menu_popup.c - handling of trims/keys, showing value
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menu_service.c- calibrate and key-test menus
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menu_key.c - settings mapping of keys
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menu_mix.c - setting of mixes (4WS, DIG, ...)
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calc.c,h - CALC task, calculate PPM values
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Only last 3 files (more menus counted as one) are used to implement what
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means what button and how it changes signal for servos. Other files are
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sort of libraries (or it can be viewed as a little operating system :-)
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To compile it at windows:
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- cd to directory with sources
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- set variable TOOLSET to path to Cosmic C compiler (set TOOLSET=...)
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- if more than 3 channels needed, set variable CHANNELS to number 3..8
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- run compile.bat
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- file gt3b.s19 is newly compiled firmware ready to load to radio
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