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keychron_qmk_firmware/keyboards/handwired/symmetric70_proto/matrix_debug
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gpio_extr.h
matrix.c
readme.md

readme.md

Debug version matrix.c

This matrix.c is 0.13.19:quantum/matrix.c with the following additions:

  • Added the MATRIX_DEBUG_SCAN_{START/END} macro to measure the execution time of matrix_scan().
  • Added the MATRIX_DEBUG_DELAY_{START/END} macro to measure delay time.
  • Added the MATRIX_MUL_SELECT handling for symmetric70_proto.

Current performance

MCU delay type execution time
of
matrix_scan()		 matrix scan rate
Pro Micro (16MHz) default 503us 1810 scans/sec
Pro Micro (16MHz) adaptive 383us 2320 scans/sec
Pro Micro (16MHz) fast adaptive 382us 2330 scans/sec
Proton C (72MHz) default 210us 4350 scans/sec
Proton C (72MHz) adaptive 76.4us 10600 scans/sec
Proton C (72MHz) fast adaptive 75.6us 10800 scans/sec

Compile

  • Set MATRIX_IO_DELAY value
    • make MTEST=mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=1 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=2 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=3 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=4 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=5 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=10 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=20 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=mdelay=30 handwired/symmetric70_proto/promicro/normal:default:flash
  • Measure the execution time of matrix_scan()
    • make MTEST=matrix_debug_scan[,<other options>..] handwired/symmetric70_proto/promicro/normal:default:flash
  • Measure delay time.
    • make MTEST=matrix_debug_delay[,<other options>..] handwired/symmetric70_proto/promicro/normal:default:flash
  • Change the behavior of delay
    • make MTEST=matrix_debug_delay,always_delay handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=matrix_debug_delay,adaptive_delay,mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash
    • make MTEST=matrix_debug_delay,adaptive_delay_fast,mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash

Measurement result

Pro Micro (ATmega32u4 16Mhz)

Default setting (show matrix_scan() time)

  • make MTEST=matrix_debug_scan handwired/symmetric70_proto/promicro/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 503us
  • Frequency of matrix scan 1.81kHz (551.0us)
    DS1Z_QuickPrint2

Always call matrix_output_unselect_delay() (show matrix_scan() time, default MATRIX_IO_DELAY)

  • make MTEST=matrix_debug_scan,always_delay handwired/symmetric70_proto/promicro/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 521us
  • Frequency of matrix scan 1.76kHz (568.5us)
    DS1Z_QuickPrint1

Adaptive delay (show matrix_scan() time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_scan,mdelay0,adaptive_delay handwired/symmetric70_proto/promicro/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 383us
  • Frequency of matrix scan 2.32kHz (431us)
    DS1Z_QuickPrint3

Adaptive delay (show delay time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_delay,mdelay0,adaptive_delay handwired/symmetric70_proto/promicro/normal:default:flash
Press R0C1, R1C1 key
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: delay time
  • Delay time 68us
  • Frequency of matrix scan 1.77kHz (565us)
    DS1Z_QuickPrint55

Fast adaptive delay (show matrix_scan() time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_scan,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/promicro/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 382us
  • Frequency of matrix scan 2.33kHz (428us)
    DS1Z_QuickPrint56

Fast adaptive delay (show delay time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_delay,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/promicro/normal:default:flash
Press R0C1, R1C1 key
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: delay time
  • Delay time 11us
  • Frequency of matrix scan 2.21kHz (452us)
    DS1Z_QuickPrint57

Proton C (STM32F303 72MHz)

Default setting (show matrix_scan() time)

  • make MTEST=matrix_debug_scan handwired/symmetric70_proto/proton_c/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 210us
  • Frequency of matrix scan 4.35kHz (230.0us)
    DS1Z_QuickPrint16

Always call matrix_output_unselect_delay() (show matrix_scan() time, default MATRIX_IO_DELAY)

  • make MTEST=matrix_debug_scan,always_delay handwired/symmetric70_proto/proton_c/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 242us
  • Frequency of matrix scan 3.85kHz (260.0us)
    DS1Z_QuickPrint17

Adaptive delay (show matrix_scan() time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_scan,mdelay0,adaptive_delay handwired/symmetric70_proto/proton_c/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 76.4us
  • Frequency of matrix scan 10.6kHz (94.4us)
    DS1Z_QuickPrint18

Adaptive delay (show delay time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_delay,mdelay0,adaptive_delay handwired/symmetric70_proto/proton_c/normal:default:flash
Press R0C1, R1C1 key
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: delay time
  • Delay time 7.6us
  • Frequency of matrix scan 9.47kHz (105.6us)
    DS1Z_QuickPrint58
Connect a 500pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Col 2
  • CH4: delay time
  • Delay time 12us + alpha
  • Frequency of matrix scan 5.45kHz (183us)
  • Threshold Voltage 1.9V
    DS1Z_QuickPrint59
Connect a 1000pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Col 2
  • CH4: delay time
  • Delay time 20us + alpha
  • Frequency of matrix scan 4.48kHz (223us)
  • Threshold Voltage 1.9V
    DS1Z_QuickPrint60

Fast adaptive delay (show matrix_scan() time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_scan,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/proton_c/normal:default:flash
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: matrix_scan()
  • Execution time of matrix_scan() 75.6us
  • Frequency of matrix scan 10.8kHz (92.2us)
    DS1Z_QuickPrint62

Fast adaptive delay (show delay time, MATRIX_IO_DELAY = 0)

  • make MTEST=matrix_debug_delay,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/proton_c/normal:default:flash
Press R0C1, R1C1 key
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Row 4
  • CH4: delay time
  • Delay time 1.6us
  • Frequency of matrix scan 10.6kHz (94.4us)
    DS1Z_QuickPrint63 DS1Z_QuickPrint64
Connect a 500pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Col 2
  • CH4: delay time
  • Delay time 13.2us
  • Frequency of matrix scan 6.58kHz (152.6us)
  • Threshold Voltage 1.9V
    DS1Z_QuickPrint65
Connect a 1000pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
  • CH1: Row 0
  • CH2: Row 1
  • CH3: Col 2
  • CH4: delay time
  • Delay time 20us
  • Frequency of matrix scan 5.30kHz (188.8us)
  • Threshold Voltage 1.9V
    DS1Z_QuickPrint66