Adding a README file with images.
Should make it much easier to get started.
This commit is contained in:
parent
051d0c27d4
commit
acbce9fb57
|
@ -0,0 +1,84 @@
|
|||
This example is for the
|
||||
[Lattice iCE40HX-8K Breakout Board](http://www.latticesemi.com/Products/DevelopmentBoardsAndKits/iCE40HX8KBreakoutBoard.aspx).
|
||||
|
||||
An image of this board is shown below;
|
||||
![img/iCE40HX8K-breakout-revA.png]
|
||||
|
||||
This board can be purchased for ~$USD 49 directly from Lattice and is supported
|
||||
by the IceStorm
|
||||
[`iceprog`](https://github.com/cliffordwolf/icestorm/tree/master/iceprog) tool.
|
||||
|
||||
|
||||
# Using the example
|
||||
|
||||
## Before Starting
|
||||
|
||||
Before starting make sure that your board is configured for `CRAM Programming`
|
||||
mode. This requires removing jumper `J7` and putting the pair of jumpers on
|
||||
`J6` to be parallel to the text on the board.
|
||||
|
||||
This is shown in **Figure 5** of the
|
||||
[iCE40HX-8K Breakout Board User Guide](http://www.latticesemi.com/view_document?document_id=50373).
|
||||
which is also reproduced below;
|
||||
![img/cram-programming-config.png]
|
||||
|
||||
Once your board is ready, you should follow the setup instructions at the
|
||||
[top level](../../../README.md).
|
||||
|
||||
You should make sure you have the following tools installed;
|
||||
* Yosys
|
||||
* arachne-pnr
|
||||
* icestorm tools (like icepack and iceprog)
|
||||
* riscv toolchain
|
||||
* sbt
|
||||
|
||||
## Building
|
||||
|
||||
You should be able to just type `make compile` and get output similar to this;
|
||||
```
|
||||
...
|
||||
place time 10.14s
|
||||
route...
|
||||
pass 1, 15 shared.
|
||||
pass 2, 4 shared.
|
||||
pass 3, 1 shared.
|
||||
pass 4, 0 shared.
|
||||
|
||||
After routing:
|
||||
span_4 4406 / 29696
|
||||
span_12 951 / 5632
|
||||
|
||||
route time 9.12s
|
||||
write_txt bin/toplevel.asc...
|
||||
icepack bin/toplevel.asc bin/toplevel.bin
|
||||
```
|
||||
|
||||
The process should take around 30 seconds on a reasonable fast computer.
|
||||
|
||||
## Programming
|
||||
|
||||
After building you should be able to run `make prog`. You may need to run `make
|
||||
sudo-prog` if root is needed to access your USB devices.
|
||||
|
||||
You should get output like the following;
|
||||
```
|
||||
iceprog -S bin/toplevel.bin
|
||||
init..
|
||||
cdone: high
|
||||
reset..
|
||||
cdone: low
|
||||
programming..
|
||||
cdone: high
|
||||
Bye.
|
||||
```
|
||||
|
||||
After programming the LEDs at the top of the board should start flashing in an
|
||||
interesting pattern.
|
||||
|
||||
## Connect
|
||||
|
||||
After programming you should be able to connect to the serial port and have the
|
||||
output echoed back to you.
|
||||
|
||||
On Linux you can do this using a command like `screen /dev/ttyUSB1`. Then as
|
||||
you type you should get back the same characters.
|
Binary file not shown.
After Width: | Height: | Size: 796 KiB |
Binary file not shown.
After Width: | Height: | Size: 39 KiB |
Loading…
Reference in New Issue