feat(uart): [IDF 5.3] fixes HardwareSerial::updateBaudRate() using a baud rate higher 230400 - checks UART Clock Source #10643
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SuGlider
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Peripheral: UART
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Test Results 61 files 61 suites 5m 48s ⏱️ Results for commit 4f46d27. |
Memory usage test (comparing PR against master branch)The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.
Click to expand the detailed deltas report [usage change in BYTES]
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EXCLUSIVE FOR IDF 5.3 - Arduino Core 3.1.x
Description of Change
ESP32 and ESP32S2 use REF_TICK as UART clock source whenever the baud rate is lower then 250,000.
This is done within
HardwareSerial::begin(uint32_t baud)This prevents issues with chaning the APB clock to lower than 40MHz, specially when achieving lower power consumpition.
This PR also fixes it for the
HardwareSerial::updateBaudRate(uint32_t baud)by checking the target baud rate and adjusting the UART Clock Source that will make it work correctly.Tests scenarios
Using this sketch (from the issue report) using ESP32 and ESP32S2
Related links
Closes #10641