# CXP

## Finished
- Upconn - Low speed serial 
  [x] Low speed serial PHY
    [x] 20.833Mbps & 41.666Mbps change
    [x] 8b10b encoder
  [x] TX Pipeline with priority transmission
    [x] Trigger
    [x] Trigger ack
    [x] Test & Ctrl packet with DMA
  [x] CTRL Packet serialize firmware
    [x] follow DRTIO DMA
    [x] check crc
- Downconn - GTX
  [x] GTX serial PHY
    [x] QPLL & GTX DRP to config linerate
    [x] Comma checker & restart rx
  [x] RX Pipeline with priority decoder
    [x] Trigger ack 
    [x] CTRL packet DMA with extra buffer
    [x] Connection test sequence checker
  [x] CTRL Packet deserialize firmware
    [x] follow DRTIO DMA
    [x] check crc
  [x] GTX Multilane setup
- Camera boostrap
  [x] get the CXP version
  [x] test connection
  [x] discovery other extension (links)
  [x] set bitrate
- Camera frame pipeline
  [x] CXP frame packet routing (maybe no need to routing non zero streaming id (we have ROI buildin anyways)?)
  [x] CXP CRC32 detection


## TODO
[] remove ALL debug tools
  [] flake.nix mod
  [] local_run.sh mod
### Gateware
[x] rename word_dw to word_width
[x] Test out CXP trigger
[] add __init__.py for cxp??
[] Try to fix tight s/h time pins
[] refactor error_cnt 
[] Heartbeat (is it useful?? lol)
[] rename circular buffer to slots
[] remove pmod/debug_sma in fns args
[] add enum for gtx mode (e.g. tx only, rx only, both)
   [] use if tx_mode / rx_mode instead
[] Region of interest engine
   [x] pixel gearbox
   [] pixel parser (xy pos)
[] rtio to getting the frame
  - O: trigger
  - I: frame
[] add a packet parser module that mux the packet?

### Firmware (design with driver)
[] Camera linkdown detection
[] Camera auto linkup/linkdown using threads
[] API programming
[] add tag handling for api calls
  - support line reset in kernel using syscall
[] add heartbeat checking

### Coredevice Driver
[] support simple camera programming interface (Not real time)
  - basic i2c-like interface with read/write u32
[] add grabber like fns & docs
[] use camera test pattern black/white to verify roi https://docs.baslerweb.com/test-patterns


### PR
1. push the gtx init fix
2. push the cxp core to misoc
3. push the cxp rtio core to artiq-zynq & artiq