6 Commits

Author	SHA1	Message	Date
Spaqin	a85b4d5f5e	I2C API for PCA9547 support (#1860)	2022-03-01 15:07:53 +08:00
Robert Jördens	e31ee1f0b3	firmware/i2c: rewrite I2C implementation ... * Never drive SDL or SDA high. They are specified to be open collector/drain and pulled up by resistive pullups. Driving high fails miserably in a multi-master topology (e.g. with a USB I2C interface). It would only ever be implemented to speed up the bus actively but that's tricky and completely unnecessary here. * Make the handover states between the I2C protocol phases (start, stop, restart, write, read) well defined. Add comments stressing those pre/postconditions. * Add checks for SDA arbitration failures and stuck SCL. * Remove wrong, misleading or redundant comments.	2020-07-15 16:43:07 +08:00
Sebastien Bourdeauducq	8719bab726	Revert "i2c: duplicate TCA9548 control byte" ... This reverts commit f265976df6.	2020-07-08 19:02:02 +08:00
Donald Sebastian Leung	f265976df6	i2c: duplicate TCA9548 control byte	2020-07-03 16:45:05 +08:00
Sebastien Bourdeauducq	449d2c4f08	libboard_misoc: fix !has_i2c	2019-11-27 21:04:28 +08:00
Sebastien Bourdeauducq	8f76a3218e	firmware: move i2c to libboard_misoc, enable IPv6 in bootloader, share network settings	2019-10-21 12:58:52 +08:00