Paul_USBDrive Memory Stick Datalogger / baudrate

Rob v.d. berg

Hi,

I'm playing with "Paul_USBDrive.spin" and "Paul_USBDemo.spin" program.
It uses serial uart 9600 baudrate,·it works good.
I have tried to speed up the baudrate with 19200 and 115200, with no luck

Is there anyone who did·this ?

Regards,
Rob.

·

StefanL38

Hello Rob,

not much info provided from you yet
so I have to ask the obvoius

did you read the VDAPFirmwareSpec(.pdf) ?

which tells how to change the baudrate

best regards

Stefan

Rob v.d. berg

Hello Stefan,

Yes·i know the tabel, in·the driver "Paul_USBdrive.spin"·is a PUB methode·to set the baudrate.·I have done the following steps:

1) set the uart to 9600 baud for default communication to the datalogger

2)·send the three byte $9C $80 $00 (LSB first) via PUB setBaudRate(divisor) (see tabel Vinculum)

3) restart the uart with 19200 baudrate

this did not work.

rob

Unsoundcode

Hi Rob, I don't have a lot of experience with Spin so someone please correct me if I am wrong. Looking at Pauls object (Ver 1.0 ) the parameters should be passed :- setBaudRate($00809C) which is opposite to what I would have expected but that seems to be the way the·object is set up. Once you return from that routine then stop the UART and restart at the new baudrate. I don't know if it makes a difference but I would normally make the change in baudrate my first program reference to the Datalogger·.

Jeff T.

Rob v.d. berg

Hi Jeff,

that's the trick,·i add in·the main of "Paul_USBDemo.spin" after the·standard uart setting (9600 baudrate) the following:

USB.setBaudRate($00809C) 'for baudrate 19200·or $00001A for 115200 baud

USB.Restart(txUSB,rxUSB,19200)·'or·115200·

waitcnt(clkfreq / 10 + cnt) 'wait 100 msec

*********************************************************

In·"Paul_USBdrive.spin"·i·add an extra PUB·to restart the uart at 19200 baudrate

PUB Restart(tx_USB,rx_USB,baudrate) | okay
· okay := USB.start(rx_USB, tx_USB, 0, baudrate)

*********************************************************

It al works·now also at 115200 baudrate!

thanks.

Rob.