Improve performance of DIN reads

[EarthenSky]

All 8 digital inputs can be read in less than 1ms on average (1000hz)

Changes

• Improve the performance of DIN reads by small bit manipulations & batching
• Stop EEPROM tests from possibly corrupting devices other than the test device
• Clean formatting a bit

TODOs

• [x] fix linter issues
• [x] test if representing DIN pins as int instead of string constants has a big impact in performance (I suspect not)

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	92%	89%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3132 / 3398)	81% (660 / 814)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3131 / 3398)	81% (659 / 814)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3131 / 3398)	81% (659 / 814)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3129 / 3396)	81% (657 / 812)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3129 / 3396)	81% (657 / 812)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	100%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3129 / 3396)	81% (657 / 812)	✔

[EarthenSky]

test if representing DIN pins as int instead of string constants has a big impact in performance (I suspect not)

A trace shows that using strings is actually negligibly faster!? Wild results, but I suppose the casting string to int takes longer than hashing the string into the table (probably optimized into an address lookup or smt, though python has surprised me)

Here's a wall time trace of the new digital_input_state call breakdown (0.13ms per call)

[EarthenSky]

And for completion's sake, here's a trace of digital_input_state_batch (reading 8 pins, takes 0.6ms)

Notice that posix.open & posix.close are only called once, yet elapse roughly the same time as opening the pin & reading it.

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[farzadpanahi]

@EarthenSky please add Performance section to readme and add a table like to show relevant numbers like: DIN | 1000 Hz | <public-func-name-here> | <link-to-example-file>

also add a examples dir if it doesn't exists and add example files there

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
adc	91%	88%	✔
calibration	100%	100%	✔
dac	100%	97%	✔
digital_input	100%	91%	✔
digital_output	98%	95%	✔
eeprom	83%	63%	✔
eeprom.protobuf_assets.eeprom_data_classes	97%	52%	✔
eeprom.protobuf_assets.generated_pb2	77%	50%	✔
gpio	98%	94%	✔
led	0%	0%	❌
peripherals	75%	28%	➖
pwm	96%	95%	✔
reg_helper	97%	85%	✔
relay	100%	100%	✔
tc	98%	98%	✔
utilities	100%	100%	✔
Summary	92% (3125 / 3391)	81% (655 / 811)	✔