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11 #define SDA_LOW() (GPES = (1 << twi_sda))
13 #define SDA_HIGH() (GPEC = (1 << twi_sda))
14 #define SDA_READ() ((GPI & (1 << twi_sda)) != 0)
15 #define SCL_LOW() (GPES = (1 << twi_scl))
16 #define SCL_HIGH() (GPEC = (1 << twi_scl))
17 #define SCL_READ() ((GPI & (1 << twi_scl)) != 0)
19 #define DEFAULT_SDA_PIN 2
20 #define DEFAULT_SCL_PIN 0