README: document echo frame limitation

echo frame is generated earlier than ideal which is acceptable for most but not all use cases.
This commit is contained in:
fenugrec 2024-06-05 12:08:06 -04:00
parent fcd3acf692
commit 3e79d97353

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@ -32,6 +32,7 @@ https://github.com/candle-usb/candleLight_fw/pull/176.
STM32G431-based devices (e.g. CANable-MKS 2.0) are not yet supported.
Currently, the firmware sends back an echo frame to the host when the frame is written to the CAN peripheral, and not when the frame is actually sent successfully on the bus. This affects timestamps, one-shot mode, and other edge cases.
## Known issues