enabled low-power sleep mode

[msperl]

This can get enabled via .equ USE_SLEEP = X USE_SLEEP = 1 enables idle sleep USE_SLEEP = 2 enables ADC sleep

Here some effective measurements on a tgy.inc style board:

• original:
  • 50.4mA unarmed no PWM
  • 50.2mA unarmed with PWM (but not neutral)
  • 48.9mA armed in Neutral
  • 50.2ma armed in Neutral after rotating motor
  • 1775 words
• with USE_SLEEP = 1:
  • 40.2mA unarmed no PWM
  • 40.2mA unarmed with PWM (but not neutral)
  • 40.2mA armed in Neutral
  • 50.2ma armed in Neutral after rotating motor
  • returning to 40.2mA when in Neutral
  • returning to 40.2mA when unarmed (after 4-8 seconds)
  • 1796 words
• with USE_SLEEP = 2:
  • 35.2mA unarmed no PWM
  • 40.2mA unarmed with PWM (but not neutral)
  • 40.2mA armed in Neutral
  • 50.2ma armed in Neutral after rotating motor
  • returning to 40.2mA when in Neutral
  • returning to 35.2mA when unarmed (after 4-8 seconds)
  • 1842 words

The USE_SLEEP = 2 implements a timer2 emulation via the ADC-ISR for reduced powerconsumption (using extended conversions), but this can not be enabled with USE_UART because there is no wakeup from deeper sleep modes than IDLE for the UART.

For I2C ONLY it would be possible to run in an even deeper sleep mode, that could bring us down to 29.6mA when unarmed.

[msperl]

I am working on continuous (glitch free) ADC sampling solution, where the sleep portion comes for (almost) free, so I close this request...