problem with my JTAG tool?

Development Boards MicroMod
1

My jtag tool is not in the box, I made one and modify a driver file form OpenOCD to support it.

It works fine with STM32 targets, but fails with LPC2148.

And I found that JTAG speed MUST be 500K to do right operation with STM32 targets.

can it caused by my jtag tool or driver?

How to modify?

My tool’s link(not published, for I want to find out why LPC2148 fails):

http://www.simonqian.com/en/O-Link/

Regards, Simon Qian

2

we are seeing similar problems with the jlink and the lpc2148.

Have a look on the openocd dev list for more details

https://lists.berlios.de/pipermail/open … 02236.html

https://lists.berlios.de/pipermail/open … 02237.html

Have you submitted the patch to openocd?

Do not remember seeing it.

Added: just found the code on your homepage - looks very much like a clone jlink. we will not be able to add this as it breaks the jlink license.

Cheers

Spen

3

I’m using the latest SVN.

I introduced and optimized the USB protocol of USBprog and JLink.

From USBprog, I use the command to control the signals, but add a mask byte. From jlink, I use the command to do jtag operation, but change the order of data, so I can do jtag operation even when the command is receiving.

I notice it breaks the jlink license, so I’ll try to make another jtag commands totally different from jlink ones. For example, collect the commands form execute_queue() and send them to my JTAG tool directly without interpret them to jtag operations.

Will commands below OK?

/// OLINK_CMD_CONN

/// no parameters

/// return version string

#define OLINK_CMD_CONN 0x80

/// OLINK_CMD_DISCONN

/// no parameters

/// no return data

#define OLINK_CMD_DISCONN 0x81

/// OLINK_CMD_SET_SPEED

/// parameter 1(1 byte): jtag speed

/// no return data

#define OLINK_CMD_SET_SPEED 0x82

/// OLINK_CMD_OPENOCD

/// parameter 1(2 byte): length in bytes

/// parameter 2(n bytes): commands

/// return data

#define OLINK_CMD_OPENOCD 0x90

/// OLINK_OPENOCDCMD_SET_PORT

/// parameter 1(1 byte): port mask

/// parameter 2(1 byte): port data

/// no return data

#define OLINK_OPENOCDCMD_SET_PORT 0x00

/// OLINK_OPENOCDCMD_TMS

/// parameter 1(1 byte): length in bits

/// parameter 2(n bytes): tms data

/// no return data

#define OLINK_OPENOCDCMD_TMS 0x01

/// OLINK_OPENOCDCMD_JTAG_SCAN

/// parameter 1(2 bytes): length in bits

/// parameter 2(n bytes): tdi data

/// return data

#define OLINK_OPENOCDCMD_JTAG_SCAN 0x02