set SCL to OUTPUT_OPEN_DRAIN

blue-2357 · blue-2357 · commit d3f2c871ebf3 · 2016-11-25T11:25:50.000+02:00
fixes: espressif/arduino-esp32#69
diff --git 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;

Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,7 @@ i2c_err_t i2cAttachSCL(i2c_t * i2c, int8_t scl)`
`67`	`67`	`if(i2c == NULL){`
`68`	`68`	`return I2C_ERROR_DEV;`
`69`	`69`	`}`
`70`		`- pinMode(scl, OUTPUT);`
	`70`	`+ pinMode(scl, OUTPUT_OPEN_DRAIN);`
`71`	`71`	`pinMatrixOutAttach(scl, I2C_SCL_IDX(i2c->num), false, false);`
`72`	`72`	`pinMatrixInAttach(scl, I2C_SCL_IDX(i2c->num), false);`
`73`	`73`	`return I2C_ERROR_OK;`