eanders01
commented
2 months ago Adding comments from #1810 [now closed as it was redundant to the original issue here]. Additional info for what is required:
Grapefruit connects to our Ruby dev board and is important to unblock SW work for Cosmo. Context for the existence and purpose of Grapefruit is located in RFD 461. We are requesting software work to be completed to support board bringup and testing to unblock Cosmo SW work.
Features
- We need a basic image that can load the FPGA and has the I2C and UART ports enabled
- This will allow us to look at the I2C/PMBUS devices, connect to the SP5 UARTs, and program the FPGA with a blinking LED. This is the hubris functionality to load an FPGA binary. @nathanaelhuffman and @cbiffle have had conversations on this and can provide additional info.
Timing
- Boards are at Bench and will start build week of 10 Jun
- Bringup with @ericaasen @nathanaelhuffman week of 24 Jun << we will need image in-place here
mkeeter
schematic can be found in the latest grapefruit GH release: https://github.com/oxidecomputer/hardware-grapefruit/releases/
This should be considered a blocking issue for board bring-up, we'd like to be able to run some semblance of hubris and humility on the target hardawre day1 to facilitate hardware checkout by toggling pins, reading i2c etc.