Proposed I2C driver and MOS API implementation

[envenomator]

Hi! This proposed driver for I2C has the following API to user programs: mos_i2c_open - to open the channel with a given frequency id (57.6Khz, 115.200Khz, 230Khz) mos_i2c_close - to close the channel mos_i2c_write - to send a I2C datagram to a given slave address, with length and pointer to a send buffer mos_i2c_read - to read a I2C datagram from a given slave address, with length and pointer to a read buffer

Currently, the following functional limitations apply to the driver:

• 7bit addressing only
• 32byte datagram length maximum, aligning with several Linux driver implementations
• Master (write/read) role only. Talking to sensors and displays uses this mode, but configuring the Agon as an I2C slave is not yet implemented
• 2sec arbitration timeout on the channel, allowing very slow sensors to reply before the channel times out, while not locking up the Agon if a sensor borks.

I'll publish example code to use this driver interface a.s.a.p.

[stevesims]

hey @envenomator thanks for this - looks awesome 👍

I'm closing this PR, as this has now been integrated via merging in Dean's latest code

[envenomator]

Hi,

no worries; merging it from Dean's latest was probably quicker. Thanks for all the hard work creating new releases!