Topics

61

NXP^TM M522XX, KINETIS and i.MX RT / USB port receiving unexpected characters

« on: November 05, 2010, 05:10:38 PM »

Hi Mark,
  When I have the usb cable between the processor and PC, I get character 'N' that keeps being picked by fnTaskUSB(..) routine even when I dont have an application communicating with my board. Would this be coming from the USB CDC driver within the PC?  Obviously when I take the cable out the characters stop coming in.

Neil

62

NXP^TM M522XX, KINETIS and i.MX RT / bringing socket out of listening mode

« on: October 08, 2010, 11:41:24 AM »

Hi Mark,
  After a socket has been placed into listening mode, how do I bring it out, preventing any incoming connections...

Regards
Neil

63

NXP^TM M522XX, KINETIS and i.MX RT / Installing USB virtual driver on Windows 7

« on: October 08, 2010, 10:31:23 AM »

Hi mark,
  I can get the USB virtual driver to install and work okay on XP, but it doesnt install on Windows 7. Do you have a seperate .inf file for Windows 7?

Regards
Neil

64

NXP^TM M522XX, KINETIS and i.MX RT / receiving a TCP_EVENT_ABORT event

« on: October 06, 2010, 05:55:19 AM »

Hi Mark,
  Within my application I call fnTCP_close(..) to close a socket. Straight away my windows application also closes the socket but after a couple of seconds the TCP_EVENT_ABORT gets called within my callback routine.

Why is this?

Does this mean I cannot make another connect command until I receive this?

Thanks
Neil

65

NXP^TM M522XX, KINETIS and i.MX RT / flushing IIC

« on: September 23, 2010, 01:53:49 PM »

Hi Mark,
  I have 3 IIC devices connected to 1 port and have a routine deciding which routine reads the incoming string .  I understand that there should never be a reason for flushing the IIC, but as the 3 devices reads in different lengths of data I want to make sure that there is nothing ready to be read when the port is idle. Is it desable to do the following:

    unsigned char   Clear[2];                 
    while ( fnRead( PortID, Clear, 1 ))
        ;

Thanks
Neil

66

NXP^TM M522XX, KINETIS and i.MX RT / incoming I2C message

« on: July 07, 2010, 01:07:36 PM »

Hi Mark,
   I have 2 I2C devices and if I do the following , one after another, what tasks will receive what bytes?

   fnRead(IICPortID, (unsigned char *)&task1, 0);    //1st device will return 10 bytes
   fnRead(IICPortID, (unsigned char *)&task2, 0);    //2nd device will return 20 bytes

Thanks
Neil

67

utFAT / Disk Space..

« on: July 02, 2010, 10:13:02 AM »

Hi Mark,
  Occasionally I wish to read the  amount of  free space on the SD card, what is the best way of doing this?

Also , where do I get information on the disk size?

Thanks
Neil

68

NXP^TM M522XX, KINETIS and i.MX RT / 10M Ethernet connection

« on: June 21, 2010, 06:37:47 PM »

Hi Mark,
  I have 5 TCP connections, 4 of which are 100M and the other a 10M.  I have the default speed as Auto Negotiation, how does this work, will this reduce the 4 100M connection down to 10M ? or I will have both speeds?

Thanks
Neil

69

NXP^TM M522XX, KINETIS and i.MX RT / know when complete data is sent..

« on: June 20, 2010, 02:17:05 PM »

Hi Mark,
  I am using the  Ethernet to send blocks of information, but how do I know when the whole block has physically been sent?

Thanks
Neil

70

NXP^TM M522XX, KINETIS and i.MX RT / using internal a/d converter

« on: June 04, 2010, 07:09:40 PM »

Hi Mark,
  I want to test the internal a/d converter of the 52259 chip. I have tied vrefH to 2.5v, and want to simply test one channel, is there an example on how to use this on the demo application?

Thanks
Neil

71

NXP^TM M522XX, KINETIS and i.MX RT / Ethernet pin as IO?

« on: February 01, 2010, 09:32:23 AM »

Hi Mark,
   I am using the Ethernet on the 52259, and dont use the FEC_TXER pin. Can I use this pin as I/O, and have the Ethernet module to continue as normal?

Regards
Neil

72

µTasker general / waken up task

« on: January 22, 2010, 11:12:11 AM »

Hi Mark,
  I wish to wake up a task in .25 second so I done the following:

   uTaskerMonoTimer( TASK_SAMPLE, (DELAY_LIMIT)(0.25*SEC), 0 );

This is the only way the task will be used, do I have to read in the message within the task as follows?

    QUEUE_HANDLE        PortIDInternal = ptrTaskTable->TaskID;           // queue ID for task input
    unsigned char       ucInputMessage[HEADER_LENGTH];                  // reserve space for receiving messages

     while ( fnRead( PortIDInternal, ucInputMessage, HEADER_LENGTH ))
    {   
        }

Regards
Neil

73

utFAT / Closed/Open File Indicator

« on: January 20, 2010, 06:03:44 PM »

Hi Mark,
  Every day a new file will be generated on an SD Card, and I have one handle for the writing. If the stUTFILE member ptr_utDirObject=0, can I assume that the file is closed?

This will save me keeping an open/close flag for each file, so I can simply close it if ptr_utDirObject !=0 before creating a new file.


Neil

74

NXP^TM M522XX, KINETIS and i.MX RT / Flexbus pin

« on: December 22, 2009, 03:14:32 PM »

Hi Mark,
  I am using the Flexbus on the 52259 for external Ram chip, and not using the FB_ALE pin. Can I use this pin for I/O?

Regards
Neil

75

NXP^TM M522XX, KINETIS and i.MX RT / 5225x USB dual mode

« on: October 02, 2009, 03:11:23 PM »

Hi Mark,
  How does the dual mode of the USB operate? I use the USB to communicate with a pc , but also have an application where I would like to be a host to a  peripheral (not at the same time). The peripheral I need to communicate with does not use a class, straight serial at 500,000 baud rate, 8 data bits, no parity, 1 stop bit, no flow control, and  it returns bcdDevice=0.

Would the above be possible? If so would I simply have 2 types of USB connector, host and client?

Best Regards
Neil