Other NXP Productsのトピックi.MX27 ADS Baud rate

i.MX27 ADS Baud rate

Birchy — Wed, 26 Aug 2009 01:46:04 GMT

I just starting to play with a MX27 ADS and I see that the default UART speed is 256K, which my older PC does not support.

Does anyone know if it can be brought up at a slower speed because I can't do anything with it.

Also, is there someone that has documentation on this board other than the user manual?

Thanks very much,

Re: i.MX27 ADS Baud rate

YanjunLuo — Thu, 27 Aug 2009 16:27:11 GMT

Are you sure? I think MX27ADS use 115200.

Re: i.MX27 ADS Baud rate

Birchy — Thu, 27 Aug 2009 21:46:19 GMT

I tried pretty much all speeds up to 115200 N81 and got nothing.

The user manual states -

Table 2-8. S16 UART Enable Switches function

S16-3, UARTA_MBAUD
ON UARTA baud rate limits to 250Kbps; default
factory setting.
OFF UARTA baud rate limits to 1Mbps.
S16-4, UARTB_EN

Re: i.MX27 ADS Baud rate

YanjunLuo — Mon, 31 Aug 2009 12:26:49 GMT

If you really want to test more than 115200, you can find one USB to serial port cable, some of them support very high speed baudrate.

I think maybe your board has some problem, you can set the DIP switch and boot from internal bootrom, then connect with ADS ToolsKit to recover the board.

Regards,

Yanjun Luo.

Re: i.MX27 ADS Baud rate

Birchy — Mon, 31 Aug 2009 21:26:22 GMT

It's the bootROM startup that I'm having a problem with.

I got the board to boot up to Linux with 115200 baud on the serial port.

Now I have to figure out how to edit, compile and run a program on the thing.

Any suggestions? Is there any documentation out there?

Thanks,

John

Re: i.MX27 ADS Baud rate

YanjunLuo — Wed, 02 Sep 2009 10:27:16 GMT

Your current question is about Linux programming, please read some book, like Advanced Programming in the UNIX Environment.

Richard Stevens, ten years already.

Regards,

Yanjun Luo.