Thomas Chou schrieb:
> 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
> # endifWhy would we need that? Since the defines reside in the board/project specific include/configs/*.h file, it is well known if the hardware has open drain or not. > > BTW, will you be interested in using common gpio framework for avr32 > family? No, AVR32AP7000 is dead for me. Working on AT91SAM9xxx now, which already uses gpio framework... Reinhard
<<attachment: reinhard_meyer.vcf>>
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