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added comments for JLink connection work.

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kkitayam 2021-03-31 22:15:03 +09:00
parent 25057022e3
commit ff2978d95f
1 changed files with 32 additions and 0 deletions
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32
hw/bsp/rx63n/boards/gr_citrus/gr_citrus.c
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@ -24,6 +24,38 @@
* This file is part of the TinyUSB stack.
*/
/* How to connect JLink and GR-CITRUS
*
* GR-CITRUS needs to solder some pads to enable JTAG interface.
* - Short the following pads individually with solder.
* - J4
* - J5
* - Short EMLE pad and 3.3V(GR-CITRUS pin name) with a wire.
*
* The pads are [the back side of GR-CITRUS](https://www.slideshare.net/MinaoYamamoto/grcitrusrx631/2).
*
* Connet the pins between GR-CITRUS and JLink as follows.
*
* | JTAG Function | GR-CITRUS pin name| JLink pin No.| note |
* |:-------------:|:-----------------:|:------------:|:--------:|
* | VTref | 3.3V | 1 | |
* | TRST | 5 | 3 | |
* | GND | GND | 4 | |
* | TDI | 3 | 5 | |
* | TMS | 2 | 7 | |
* | TCK | 14 | 9 | short J4 |
* | TDO | 9 | 13 | short J5 |
* | nRES | RST | 15 | |
*
* JLink firmware needs to update to V6.96 or newer version to avoid
* [a bug](https://forum.segger.com/index.php/Thread/7758-SOLVED-Bug-in-JLink-from-V6-88b-regarding-RX65N)
* regarding downloading.
*
* When using SEGGER RTT, `RX_NEWLIB=0` should be added to make command arguments.
* The option is used to change the C runtime library to `optlib` from `newlib`.
* RTT may not work with `newlib`.
*/
#include "../board.h"
#include "iodefine.h"
#include "interrupt_handlers.h"