TtgoModule < IoT_Course_English

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---+ The ttgo module

The ttgo module is again a pure !MicroPython module used to initialize the t-watch hardware. It contains two classes:
   * Watch
   * Motor
   * and Display
The *Watch class* has the following methods:
   * Watch(fastboot=False): creates a Watch object. This method initializes:
      * the !I2C port 0 bus
      * the axp202 power management module
      * the display
      * and touch screen hardware
   * __init_prep__() initializes:
      * Motor class
      * the PCF8563 real time clock
      * and the BMA423 triaxial acceleration sensor.
   * __init_touch__() initializes the !FT6236U touch panel controller. This method is called when the Watch object is created
   * __display__() initializes the st7789 display controller
   * pmu_attach_interrupt(callback): attaches a callback routine to pmu (power management unit) interrupts
   * rtc_attach_interrupt(callback): attaches a callback routine to the bma423 interrupt
   * enable_audio_power(en=True): enables of disables power to the sound system
   * lvgl_begin(): initializes the LVGL graphical user interface library and registers the st7789 display driver and the ft6x36 touch panel driver with LVGL
   * init_power(): initializes the pmu system
   * power_off(): switch watch power off
After creating a Watch object :
<verbatim>import ttgo
watch = ttgo.Watch()</verbatim>

you can access the initialized driver objects with:
   * watch.__i2c__
   * watch.touch
   * watch.tft
   * watch.motor
   * watch.rtc
   * watch.pmu
   * watch.bma
The *Display* class has these methods:
   * Display(pmu):
      * creates a st7789_lvgl object
      * initializes the back light GPIO pin
      * turns the display back light off
   * backlight_fade(val=100): fade the back light level to val
   * switch_scene():
   * set_backlight_level(percent): set the back light level
   * __turn_lcd_backlight__(val): turn back light on or off)
   * __set_lcd_backlight_voltage(voltage=3200): set the voltage to a level between 2.4V and 3.2 V
The *Motor* class:
   * Motor(): create a Motor object. Create a PWM pin on GPIO 4 to control the vibration motor power
   * on(): switch the buzzer and vibration motor on
   * off(): switch it off
   * set_strength(strength): set the strength of the vibration/buzzer signal
   * set_freq(freq): set the PWM frequency

-- %USERSIG{UliRaich - 2021-01-28}%

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Topic revision: r2 - 2021-01-29 - UliRaich