URL
https://opencores.org/ocsvn/ion/ion/trunk
[/] [ion/] [trunk/] [src/] [sdboot/] [readme.txt] - Blame information for rev 251
Go to most recent revision |
Details |
Compare with Previous |
View Log
Line No. |
Rev |
Author |
Line |
1 |
246 |
ja_rd |
This is a minimalistic bootloader meant to run from BRAM.
|
2 |
|
|
|
3 |
|
|
Upon reset, it will read file '/code.bin' from the DE-1 board SD card, load it
|
4 |
|
|
at address 0x00000000 and then jump to that address.
|
5 |
|
|
|
6 |
|
|
Any program meant to be bootloaded in this way has to be compiled with link
|
7 |
|
|
script 'xram.lds', and the binary renamed 'code.bin'. See the 'Adventure' demo
|
8 |
|
|
(makefile target 'sd') for an example.
|
9 |
|
|
|
10 |
247 |
ja_rd |
In this directory you'll find a copy of the Adventure binary called 'code.bin'
|
11 |
|
|
that you can use to try the bootloader. Just put it in the root directory of
|
12 |
|
|
a FAT32 SD card and load this demo (and hope the card format is understood by
|
13 |
|
|
the FAT library...).
|
14 |
|
|
|
15 |
246 |
ja_rd |
This program is built around elm-chan's FAT32 library, which has been ported
|
16 |
|
|
to the ION SoC using a bitbanged interface. This should be easy to port to other
|
17 |
|
|
boards.
|
18 |
|
|
|
19 |
|
|
The binary will be truncated to 256KB.
|
20 |
|
|
|
21 |
|
|
Uses serial port console at 19200/8/N/1.
|
22 |
|
|
|
23 |
|
|
|
24 |
|
|
Run 'make demo' and synthesize as instructed for the 'Hello World' demo.
|
25 |
|
|
|
26 |
|
|
|
27 |
|
|
This program is meant to be synthesized and used as a bootloader for
|
28 |
|
|
demonstration or development, running from BRAM. It is too large to be run from
|
29 |
|
|
BRAM in a real application; it should be modified to run from flash instead --
|
30 |
|
|
or you might use another bootloader, assuming you get it to compile and run
|
31 |
|
|
on the MIPS-I core...
|
32 |
|
|
|
33 |
|
|
This demo is not meant to be simulated in Modelsim or in software, no support
|
34 |
|
|
is provided for that.
|
© copyright 1999-2024
OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.