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Small update to Symmetric70 keyboard readme (#17188)

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Added a little description to reademe.md under `handwired/symmetric70_proto/{matrix_debug|matrix_fast}`.
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Takeshi ISHII 2022-05-25 21:11:13 +09:00 committed by GitHub
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keyboards/handwired/symmetric70_proto/matrix_debug/readme.md
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# Debug version matrix.c
This matrix.c is quantum/matrix.c with the following additions:
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 <br> of <br> `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

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keyboards/handwired/symmetric70_proto/matrix_fast/readme.md
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@ -15,6 +15,13 @@ This matrix.c is faster and more extensible than the standard quantum/matrix.c.
- [ ] support I/O expander (MCP23018)
- [ ] support MCU & I/O expander (MCP23018) mixture like ErgoDox
## Current performance
| MCU | delay type | execution time <br> of <br> `matrix_scan()` | matrix scan rate |
|-------------------|---------------|------------|-----------------|
| Pro Micro (16MHz) | fast adaptive | 75.6us | 8090 scans/sec |
| Proton C (72MHz) | fast adaptive | 49.8us | 15100 scans/sec |
## Configuration
This matrix.c requires a different configuration than quantum/matrix.c.