sys: rt-thread: Check for U8X8_PIN_NONE. #2506
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RT-Thread use signed value for its pin numbers, while using -1 for PIN_NONE. So when using U8X8_PIN_NONE, RT-Thread will incorrectly interpret the pin as positive integer (255). This patch wraps rt_pin_xxx functions to detect this condition. It does limit the selectable pin ranges to 0-255, however it should be enough for now. Signed-off-by: Yilin Sun <[email protected]>
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RT-Thread use signed value for its pin numbers, while using -1 for PIN_NONE. So when using U8X8_PIN_NONE, RT-Thread will incorrectly interpret the pin as positive integer (255).
This patch wraps rt_pin_xxx functions to detect this condition. It does limit the selectable pin ranges to 0-255, however it should be enough for now.