Reinhard Meyer wrote:
> Its even simpler, provided the hardware can do open collector. Here was
> my solution for AVR32AP7000:
>
Then we could add a config for open drain similar to that of linux driver.
# ifndef I2C_SDA
# ifdef CONFIG_SOFT_I2C_GPIO_SDA_IS_OPEN_DRAIN
# define I2C_SDA(bit) gpio_set_value(CONFIG_SOFT_I2C_GPIO_SDA, bit)
# else
# define I2C_SDA(bit) \
if (bit) { \
gpio_direction_input(CONFIG_SOFT_I2C_GPIO_SDA); \
} else { \
gpio_direction_output(CONFIG_SOFT_I2C_GPIO_SDA, 0);\
}
# endif
# endif
BTW, will you be interested in using common gpio framework for avr32 family?
Cheers,
Thomas
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