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D13 and D15 were mapped to each other's GPIO. Per the Seeed Studio wiki pin map and the board schematic, D13 is wired to GPIO21 (SCL1) and D15 to GPIO19. This also makes D13 agree with the existing SCL1 entry (GPIO21) and D14 with SDA1 (GPIO20). Co-Authored-By: Claude <noreply@anthropic.com> Signed-off-by: cumin <13809292481@163.com>
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D13 and D15 were mapped to each other GPIO. Per the official Seeed wiki pin map and the board schematic, D13 is GPIO21 (SCL1) and D15 is GPIO19; the actual pad order is 18, 21, 20, 19, not sequential. Also correct the neighboring comments: SDA1 is on D14 (GPIO20), and PIN_WIRE1_SCL (GPIO21) is D13. MicroPython had the identical bug, fixed in micropython/micropython#19695 Co-authored-by: Claude <noreply@anthropic.com>
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Fixes a swapped pin mapping for the Seeed Studio XIAO RP2040 Plus that was introduced in #19253 (the Plus-only pins live in
SEEED_XIAO_RP2040/pins.csv).Problem:
D13was mapped toGPIO19andD15toGPIO21, but on the actual hardware D13 is wired to GPIO21 and D15 to GPIO19.Evidence:
D13 = GPIO21 (I2C1 clock),D14 = GPIO20 (I2C1 data),D15 = GPIO19(https://wiki.seeedstudio.com/XIAO-RP2040/, "Pin Map" table).GPIO21/SCL1/D13,GPIO20/SDA1/D14,GPIO19/D15.SCL1,GPIO21andSDA1,GPIO20, and the wiki/schematic identify D13 as SCL1 and D14 as SDA1, so D13 must be GPIO21.The mistaken sequential assignment (
GPIO18,19,20,21->D12..D15) also exists in the arduino-picoseeed_xiao_rp2040_plusvariant and will be reported there separately.Effect of the bug: code referring to board pins
D13/D15(e.g.machine.Pin("D13")) drove the opposite pad.SCL1/SDA1and the other Plus-only pins were unaffected.Fix: swap the two GPIO values so that
D13,GPIO21andD15,GPIO19.