set SCL to OUTPUT_OPEN_DRAIN

fixes: https://github.com/espressif/arduino-esp32/issues/69

set SCL to OUTPUT_OPEN_DRAIN
fixes: https://github.com/espressif/arduino-esp32/issues/69
be2a26b3 · Me No Dev · GitHub · d8b22903 · be2a26b3
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cores/esp32/esp32-hal-i2c.c cores/esp32/esp32-hal-i2c.c +1 -1

未找到文件。
--- a/cores/esp32/esp32-hal-i2c.c
+++ b/cores/esp32/esp32-hal-i2c.c
@@ -67,7 +67,7 @@ i2c_err_t i2cAttachSCL(i2c_t * i2c, int8_t scl)
    if(i2c == NULL){
        return I2C_ERROR_DEV;
    }
-    pinMode(scl, OUTPUT);
+    pinMode(scl, OUTPUT_OPEN_DRAIN);
    pinMatrixOutAttach(scl, I2C_SCL_IDX(i2c->num), false, false);
    pinMatrixInAttach(scl, I2C_SCL_IDX(i2c->num), false);
    return I2C_ERROR_OK;