Managed C++/CLI

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

22-Dec-10 9:07

there is at least one Tip/Trick on this subject, with some alternates; none of them I consider satisfactory though, and I haven't found the right approach yet.

There are three levels to the problem:
- what is my application doing?
- what is my operating system capable of?
- if running on a virtual machine, what is my physical machine capable of?

First make sure which question you need answered.

FWIW: Are you sure you want a managed code (i.e. .NET) solution, or are you a native C++ speaker, simply lost in the wrong forum? (the C/C++/MFC forum is for native code!).

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Richard MacCutchan22-Dec-10 9:09

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

22-Dec-10 9:09

Luc Pattyn wrote:
I haven't found the right approach yet.

Nor me. You would think that a simple API call somewhere could do this.

Just say 'NO' to evaluated arguments for diadic functions! Ash

Richard MacCutchan22-Dec-10 9:08

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

22-Dec-10 9:08

This will never work because sizeof() is evaluated by the compiler so it will tell you the size of a void* on the system that it is compiled on. I just tried a Google on this and there does not seem to be an obvious answer to do it programatically; maybe one of the other geeks here knows the answer.

Just say 'NO' to evaluated arguments for diadic functions! Ash

ShilpiP23-Dec-10 19:27

ShilpiP

23-Dec-10 19:27

What i understand is that you want to know that is OS is 32 bit or 64 bit...

BOOL XYZ::Is64BitOS()
{
	SYSTEM_INFO sysInfo;
	GetSystemInfo(&sysInfo);
	if((sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) || (sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64))
		return TRUE;
	return FALSE;
}

Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

SoftwareDeveloperGoa26-Dec-10 7:10

SoftwareDeveloperGoa

26-Dec-10 7:10

Hey thanks, you got it correct but somehow the code did not worked, but i googled with your input and found an alternative which worked.

BOOL Is64BitWindows()
{
#if defined(_WIN64)
return TRUE; // 64-bit programs run only on Win64
#elif defined(_WIN32)
// 32-bit programs run on both 32-bit and 64-bit Windows
// so must sniff
BOOL f64 = FALSE;
return IsWow64Process(GetCurrentProcess(), &f64) && f64;
#else
return FALSE; // Win64 does not support Win16
#endif
}

Thanks a lot.

Goa Guy

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

ShilpiP26-Dec-10 18:06

ShilpiP

26-Dec-10 18:06

Most Welcome Smile | :)

Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

Richard MacCutchan26-Dec-10 23:05

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

26-Dec-10 23:05

This is still wrong! If you compile this code on a system where _WIN64 is defined then the generated code will return TRUE from the Is64BitWindows() function. However if you then run that same code on a 32 bit system it will still return TRUE and your program will most likely fail. You need to understand the difference between compile time and run time tests.

Just say 'NO' to evaluated arguments for diadic functions! Ash

jschell30-Dec-10 11:12

jschell

30-Dec-10 11:12

<blockquote class="FQ"><div class="FQA">Richard MacCutchan wrote:</div>This is still wrong! If you compile this code on a system where _WIN64 is defined then the generated code will return TRUE from the Is64BitWindows() function</blockquote>

The _WIN64 macro is a Microsoft compiler option that indicates that the code is being compiled for 64 bits.
The following link says that is what it is.

http://msdn.microsoft.com/en-us/library/b0084kay.aspx[^]

So excluding someone using that macro incorrectly (if even possible) the compiled code would then be compiled to run on 64 bits.

And a 64 bit application won't run on a 32 bit machine - right?

So what would be the situation where it returns an incorrect result?

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

Richard MacCutchan30-Dec-10 22:52

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

30-Dec-10 22:52

jschell wrote:
And a 64 bit application won't run on a 32 bit machine - right?

Correct.

jschell wrote:
So what would be the situation where it returns an incorrect result?

I'm not sure that I understand your question fully. However in the case above that I commented on, if the code is compiled on a system with _WIN64 defined, and then run on a 32 bit system, it wil return TRUE from that function thus thinking that it is on a 64-bit system. I have no idea what the outcome would be but I would expect it to fail at some point.

Just say 'NO' to evaluated arguments for diadic functions! Ash

jschell1-Jan-11 10:10

jschell

1-Jan-11 10:10

Richard MacCutchan wrote:
However in the case above that I commented on, if the code is compiled on a system with _WIN64 defined, and then run on a 32 bit system, it wil return TRUE from that function thus thinking that it is on a 64-bit system.

The _WIN64 is a VS compiler macro that is only defined when VS is set up to compile to a 64 bit binary.

A 64 bit binary will not run on a 32 bit platform.

If both of those are true then the result of the method is irrelevant.

Do you believe that one of those is false?
If so why?

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

Richard MacCutchan1-Jan-11 21:35

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

1-Jan-11 21:35

jschell wrote:
If both of those are true then the result of the method is irrelevant.

Quite possibly, but the thinking behind the code is still flawed.

Just say 'NO' to evaluated arguments for diadic functions! Ash

Richard MacCutchan2-Jan-11 1:18

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

2-Jan-11 1:18

I have been reflecting on this point and your answer. I think the reason for my comments was based on a situation I had when working on a multi-platform system some years ago. We had a similar situation where our manager insisted the code by written with #ifdef's, even though we had explained to him that it needed to be execution time tests. After releasing the code we were proved right and the manager's career did not last much longer. As you pointed out, this situation is somewhat different.

Just say 'NO' to evaluated arguments for diadic functions! Ash

jschell2-Jan-11 8:49

jschell

2-Jan-11 8:49

Richard MacCutchan wrote:
We had a similar situation where our manager insisted the code by written with #ifdef's, even though we had explained to him that it needed to be execution time tests.

I don't understand that comment.

If I am targetting a 32 bit platform and a 64 bit platform then I would really expect that I must run two complete set of tests, one on the 32 and one the 64 bit.

And if the functionality was different at a minimum I would loudly and repeatedly state that I would expect it to fail if it wasn't tested on a specific target. I would be nervous even if it was exactly the same. Especially with C++ (or C.)

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

Richard MacCutchan2-Jan-11 23:29

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

2-Jan-11 23:29

jschell wrote:
I don't understand that comment.

I can't make it any clearer.

Just say 'NO' to evaluated arguments for diadic functions! Ash

Philippe Mori10-Mar-11 15:26

Philippe Mori

10-Mar-11 15:26

Essential, if you are compiling a 64 bit application, the compiler would define _WIN64 and since that application would not run on a 32 bit OS, then in that case, it is essentially pointless to actually check the OS. If the OS would have been 32 bits, the application would have fail to load.

Identifier starting with underscore are supposed to be reserved to the compiler so if someone use them anyway the result might be undefined.

Thus only when the application is compiled in 32 bits, it is necessary to do the test.

Philippe Mori

Re: On which OS Architecture i am 32 Bit or 64 Bit, Can c++ tell me?

Karpov Andrey1-Jan-11 6:45

Karpov Andrey

1-Jan-11 6:45

How can a 32-bit program detect that it is launched in a 64-bit Windows? - http://www.viva64.com/en/k/0016/[^]

saveing bindingsource to database (sql)

sam_b15-Dec-10 11:33

sam_b

15-Dec-10 11:33

hi
i finally figuered out how to use the binding source commponent of visual c++/cli and i find it really usefull.
i created my own class and assigned it to the bindingsource:

form1BindingSource->Add(gcnew class_constructor_here(textBox1->Text, var1));

now my problem is that the "data" is only stored temporary, so if i close my form program the data is lost.

how can i save the form1BindingSource to a sql database?

i already figuered out how to mke an connection to the database...:

        String^ connectString = "Data Source=.\SQLEXPRESS;AttachDbFilename=\"database.mdf\";Integrated Security=True;Connect Timeout=30;User Instance=True";

        using (SqlConnection connection = gcnew SqlConnection(connectString))
        {
}

now can someone please givve me some hints or tutorials how to save my form1BindingSource to the database?
please... i can't find any usefull stuff in google Frown | :(

thx
sam

Is there anyone have experience in programming Controller Area Network?

kent524414-Dec-10 22:11

Re: Is there anyone have experience in programming Controller Area Network?

14-Dec-10 22:11

Hi,

I need to program PIC 16F876A to control MCP2515 CAN controller? Anyone got any experience or example to shared? I having trouble in understanding the example code i found.

/*
 * Project name:
     Can_1st (CAN Network demonstration with mikroE's CAN module)
 * Copyright:
     (c) MikroElektronika, 2005-2008
 * Description:
     This project is a simple demonstration of CAN on PIC18F448 with minor
     adjustments, it should work with any other MCU that has a CAN module.
     This code demonstrates how to use CAN library functions and procedures.
     It is used together with the CAN_2nd example (on second MCU), and it can
     be used to test the connection of MCU to the CAN network.
     This node initiates the communication with the Can_2nd node by sending some
     data to its address. The 2nd node responds by sending back the data incre-
     mented by 1. This (1st) node then does the same and sends incremented data
     back to 2nd node, etc.
 * Test configuration:
     MCU:             PIC18F448
     Dev.Board:       EasyPIC6
                      http://www.mikroe.com/en/tools/easypic6/
     Oscillator:      HS, 8.0000 MHz
     Ext. Modules:    mE CAN extra board on PORTB
                      http://www.mikroe.com/en/tools/can1/
     SW:              mikroC PRO for PIC
                      http://www.mikroe.com/en/compilers/mikroc/pro/pic/
 * NOTES:
     - Consult the CAN standard about CAN bus termination resistance.
     - Turn off LEDs SW9.2 and pull-up (place jumper in upper position)  (board specific)
       lines on PORTB. mE CAN extra board should be connected to PORTB.
     - Turn on LEDs on PORTC (SW9.3) (board specific)
 */

unsigned char Can_Init_Flags, Can_Send_Flags, Can_Rcv_Flags; // can flags
unsigned char Rx_Data_Len;                                   // received data length in bytes
char RxTx_Data[8];                                           // can rx/tx data buffer
char Msg_Rcvd;                                               // reception flag
const long ID_1st = 12111, ID_2nd = 3;                       // node IDs
long Rx_ID;

void main() {

  PORTC = 0;                                                // clear PORTC
  TRISC = 0;                                                // set PORTC as output

  Can_Init_Flags = 0;                                       //
  Can_Send_Flags = 0;                                       // clear flags
  Can_Rcv_Flags  = 0;                                       //

  Can_Send_Flags = _CAN_TX_PRIORITY_0 &                     // form value to be used
                   _CAN_TX_XTD_FRAME &                      //     with CANWrite
                   _CAN_TX_NO_RTR_FRAME;

  Can_Init_Flags = _CAN_CONFIG_SAMPLE_THRICE &              // form value to be used
                   _CAN_CONFIG_PHSEG2_PRG_ON &              // with CANInit
                   _CAN_CONFIG_XTD_MSG &
                   _CAN_CONFIG_DBL_BUFFER_ON &
                   _CAN_CONFIG_VALID_XTD_MSG;
  
  CANInitialize(1,3,3,3,1,Can_Init_Flags);                  // Initialize CAN module
  CANSetOperationMode(_CAN_MODE_CONFIG,0xFF);               // set CONFIGURATION mode
  CANSetMask(_CAN_MASK_B1,-1,_CAN_CONFIG_XTD_MSG);          // set all mask1 bits to ones
  CANSetMask(_CAN_MASK_B2,-1,_CAN_CONFIG_XTD_MSG);          // set all mask2 bits to ones
  CANSetFilter(_CAN_FILTER_B2_F4,ID_2nd,_CAN_CONFIG_XTD_MSG);// set id of filter B2_F4 to 2nd node ID

  CANSetOperationMode(_CAN_MODE_NORMAL,0xFF);               // set NORMAL mode

  RxTx_Data[0] = 9;                                         // set initial data to be sent

  CANWrite(ID_1st, RxTx_Data, 1, Can_Send_Flags);           // send initial message

  while(1) {                                                               // endless loop
    Msg_Rcvd = CANRead(&Rx_ID , RxTx_Data , &Rx_Data_Len, &Can_Rcv_Flags); // receive message
    if ((Rx_ID == ID_2nd) && Msg_Rcvd) {                                   // if message received check id
      PORTC = RxTx_Data[0];                                                // id correct, output data at PORTC
      RxTx_Data[0]++ ;                                                     // increment received data
      Delay_ms(10);
      CANWrite(ID_1st, RxTx_Data, 1, Can_Send_Flags);                      // send incremented data back
    }
  }
}

/*
 * Project name:
     Can_2nd (CAN Network demonstration with mikroE's CAN module)
 * Copyright:
     (c) MikroElektronika, 2005-2008
 * Description:
     This project is a simple demonstration of CAN on PIC18F448 with minor
     adjustments, it should work with any other MCU that has a CAN module.
     This code demonstrates how to use CAN library functions and procedures.
     It is used together with the Can_1st example (on second MCU), and it can
     be used to test the connection of MCU to the CAN network.
     This node receives data, increments it by 1 and send it back to the 1st node.
 * Test configuration:
     MCU:             PIC18F448
     Dev.Board:       EasyPIC6
                      http://www.mikroe.com/en/tools/easypic6/
     Oscillator:      HS, 8.0000 MHz
     Ext. Modules:    mE CAN extra board on PORTB
                      http://www.mikroe.com/en/tools/can1/
     SW:              mikroC PRO for PIC
                      http://www.mikroe.com/en/compilers/mikroc/pro/pic/
 * NOTES:
    - Consult the CAN standard about CAN bus termination resistance.
    - Turn off LEDs SW9.2 and pull-up (place jumper in upper position)  (board specific)
      lines on PORTB. mE CAN extra board should be connected to PORTB.
    - Turn on LEDs on PORTC (SW9.3) (board specific)
 */

unsigned char Can_Init_Flags, Can_Send_Flags, Can_Rcv_Flags; // can flags
unsigned char Rx_Data_Len;                                   // received data length in bytes
char RxTx_Data[8];                                           // can rx/tx data buffer
char Msg_Rcvd;                                               // reception flag
const long ID_1st = 12111, ID_2nd = 3;                       // node IDs
long Rx_ID;

void main() {

  PORTC = 0;                                                // clear PORTC
  TRISC = 0;                                                // set PORTC as output

  Can_Init_Flags = 0;                                       //
  Can_Send_Flags = 0;                                       // clear flags
  Can_Rcv_Flags  = 0;                                       //

  Can_Send_Flags = _CAN_TX_PRIORITY_0 &                     // form value to be used
                   _CAN_TX_XTD_FRAME &                      //     with CANWrite
                   _CAN_TX_NO_RTR_FRAME;

  Can_Init_Flags = _CAN_CONFIG_SAMPLE_THRICE &              // form value to be used
                   _CAN_CONFIG_PHSEG2_PRG_ON &              // with CANInit
                   _CAN_CONFIG_XTD_MSG &
                   _CAN_CONFIG_DBL_BUFFER_ON &
                   _CAN_CONFIG_VALID_XTD_MSG &
                   _CAN_CONFIG_LINE_FILTER_OFF;

  CANInitialize(1,3,3,3,1,Can_Init_Flags);                  // initialize external CAN module
  CANSetOperationMode(_CAN_MODE_CONFIG,0xFF);               // set CONFIGURATION mode
  CANSetMask(_CAN_MASK_B1,-1,_CAN_CONFIG_XTD_MSG);          // set all mask1 bits to ones
  CANSetMask(_CAN_MASK_B2,-1,_CAN_CONFIG_XTD_MSG);          // set all mask2 bits to ones
  CANSetFilter(_CAN_FILTER_B2_F3,ID_1st,_CAN_CONFIG_XTD_MSG);// set id of filter B2_F3 to 1st node ID

  CANSetOperationMode(_CAN_MODE_NORMAL,0xFF);               // set NORMAL mode

  while (1) {                                                              // endless loop
    Msg_Rcvd = CANRead(&Rx_ID , RxTx_Data , &Rx_Data_Len, &Can_Rcv_Flags); // receive message
    if ((Rx_ID == ID_1st) && Msg_Rcvd) {                                   // if message received check id
      PORTC = RxTx_Data[0];                                                // id correct, output data at PORTC
      RxTx_Data[0]++ ;                                                     // increment received data
      CANWrite(ID_2nd, RxTx_Data, 1, Can_Send_Flags);                      // send incremented data back
    }
  }
}

Luc Pattyn15-Dec-10 1:22

Re: Is there anyone have experience in programming Controller Area Network?

15-Dec-10 1:22

Hi,

1.
you're asking in the wrong forum: C++/CLI is the .Net version of C++, not the PIC version! I will not proceed here beyond this single reply.

2.
I have done lots of CAN applications, and I have used several PIC models, however I never did real CAN on PIC (I have a CAN-like protocol running on a tiny PIC, all in software though). So all I can offer is a set of advice:

3.
make sure you read all you can get about CAN in general, and thoroughly read your PIC's documentation. Peripherals need a lot of initialization (see the start of your Main functions), and a single error or omission there may cause total failure.

4.
Your test set-up is sending basically the same message back and forth from one PIC to the other, it does not offer any observability: it could be running fine without you noticing anything, or it could fail completely, how can you tell? I suggest you connect a few LEDs (or any other output device) and set their value inside the while loop; displaying a few bits of RxTx_Data[0] should generate an incrementing binary pattern. Observability is key in all debugging, and often is even more important on embedded systems; take care of it from the start, the payback will be immediate.

5.
For any serious application you would need interrupts, and probably also CAN message filtering (assuming multiple PIC nodes and a rather busy CAN bus). Your test has neither. So it may become much more complex.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

kent524415-Dec-10 5:54

My last CAN reply in this forum.

15-Dec-10 5:54

Thanks for your advices and I am sorry because I am confused where to post my question since the source code is in .c file type so I am thought i can post it in C++.

It would be great if u can gives me some link to some example of CAN using PIC since I can't really find one that I manage to understood.

Luc Pattyn15-Dec-10 6:08

Re: My last CAN reply in this forum.

15-Dec-10 6:08

use either the hardware forum or the C/C++ forum. I will probably see it where ever you put it!

search for:
PIC application notes
PIC AN738
TCanDriver
16F876 CAN source code

if you need more help, ask specific questions; however begin with providing detailed context: are you using a kernel/operating system? do you need to interact with existing CAN nodes? if so, what specific CAN protocol do you need? what is the application? what is the bit rate, the bus load to be expected, the rate of *other* interrupts, etc etc.

Embedded systems aren't simple. If this were your first experiment, start with simpler things: a few LEDs (needed anyway for debugging), a serial port. When you feel comfortable, switch to more complex stuff (such as USB, Ethernet, CAN).

End of thread.

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

kent524415-Dec-10 6:19

Re: My last CAN reply in this forum.

15-Dec-10 6:19

yea, this is the first time I experiment with CAN. I was confuse where to start with. I have already collected and roughly go through the data sheet for each PIC needed. After that, I drawn the circuit diagram and then tried to understand the source code I posted above but its too complicated for a beginner like me.

I really appreciated your prompt reply. I think i should make myself more clear before I ask questions.

Thanks again for your prompt reply. Hope to receive your reply for my future question. Smile | :)

kent52449-Jan-11 21:32

Re: My last CAN reply in this forum.

9-Jan-11 21:32

Hi Luc Pattyn,

Do you used simulation to run your CAN project? If yes, may I know what is the simulator? I have a proteus 7 software which can do simulation job, but the problem is the software dont have MCP 2551 and MCP 2515 device. I cant find the library.

I have done a simple program but it does not run when i burn into the microcontroller (pic 16f877). There is no compilation error also.

CAN node 1

unsigned char Can_Init_Flags, Can_Send_Flags, Can_Rcv_Flags; // can flags
unsigned char Rx_Data_Len;                                   // received data length in bytes
char RxTx_Data[8];                                           // can rx/tx data buffer
char Msg_Rcvd;                                               // reception flag
const long ID_1st = 12111, ID_2nd = 3;                       // node IDs
long Rx_ID;

// CANSPI module connections
sbit CanSpi_CS            at  RC0_bit;
sbit CanSpi_CS_Direction  at  TRISC0_bit;
sbit CanSpi_Rst           at  RC2_bit;
sbit CanSpi_Rst_Direction at  TRISC2_bit;
// End CANSPI module connections

void main() {

  PORTA = 0x00;                                             // clear PORTA
  TRISA = 0xFF;                                             // set PORTA as input

  //PORTB = 0x00;                                             // clear PORTB
  //TRISB = 0x00;                                             // set PORTB as output
  
  //PORTC = 0x00;                                             // clear PORTC
  //TRISC = 0x00;                                             // set PORTC as output
  
  PORTD = 0x00;                                             // clear PORTD
  TRISD = 0x00;                                             // set PORTD as output

  Can_Init_Flags = 0;                                         //
  Can_Send_Flags = 0;                                         // clear flags
  Can_Rcv_Flags  = 0;                                         //

  Can_Send_Flags = _CANSPI_TX_PRIORITY_0 &                    // form value to be used
                   _CANSPI_TX_XTD_FRAME &                     //     with CANSPIWrite
                   _CANSPI_TX_NO_RTR_FRAME;

  Can_Init_Flags = _CANSPI_CONFIG_SAMPLE_THRICE &             // Form value to be used
                   _CANSPI_CONFIG_PHSEG2_PRG_ON &             //  with CANSPIInit
                   _CANSPI_CONFIG_XTD_MSG &
                   _CANSPI_CONFIG_DBL_BUFFER_ON &
                   _CANSPI_CONFIG_VALID_XTD_MSG;


  SPI1_Init();                                                     // initialize SPI1 module

  CANSPIInitialize(1,3,3,3,1,Can_Init_Flags);                      // Initialize external CANSPI module
  CANSPISetOperationMode(_CANSPI_MODE_CONFIG,0xFF);                // set CONFIGURATION mode
  CANSPISetMask(_CANSPI_MASK_B1,-1,_CANSPI_CONFIG_XTD_MSG);        // set all mask1 bits to ones
  CANSPISetMask(_CANSPI_MASK_B2,-1,_CANSPI_CONFIG_XTD_MSG);        // set all mask2 bits to ones
  CANSPISetFilter(_CANSPI_FILTER_B2_F4,ID_2nd,_CANSPI_CONFIG_XTD_MSG);// set id of filter B2_F4 to 2nd node ID

  CANSPISetOperationMode(_CANSPI_MODE_NORMAL,0xFF);                // set NORMAL mode

  RxTx_Data[0] = 9;                                                // set initial data to be sent

  CANSPIWrite(ID_1st, RxTx_Data, 1, Can_Send_Flags);               // send initial message
}

CAN node2

unsigned char Can_Init_Flags, Can_Send_Flags, Can_Rcv_Flags; // can flags
unsigned char Rx_Data_Len;                                   // received data length in bytes
char RxTx_Data[8];                                           // can rx/tx data buffer
char Msg_Rcvd;                                               // reception flag
const long ID_1st = 12111, ID_2nd = 3;                       // node IDs
long Rx_ID;

// CANSPI module connections
sbit CanSpi_CS            at  RC0_bit;
sbit CanSpi_CS_Direction  at  TRISC0_bit;
sbit CanSpi_Rst           at  RC2_bit;
sbit CanSpi_Rst_Direction at  TRISC2_bit;
// End CANSPI module connections

void main() {

  PORTA = 0x00;                                               // clear PORTA
  TRISA = 0x00;                                               // set PORTA as output

  PORTD = 0x00;                                               // clear PORTD
  TRISD = 0x00;                                               // set PORTD as output

  Can_Init_Flags = 0;                                         //
  Can_Send_Flags = 0;                                         // clear flags
  Can_Rcv_Flags  = 0;                                         //

  Can_Send_Flags = _CANSPI_TX_PRIORITY_0 &                    // form value to be used
                   _CANSPI_TX_XTD_FRAME &                     //   with CANSPIWrite
                   _CANSPI_TX_NO_RTR_FRAME;

  Can_Init_Flags = _CANSPI_CONFIG_SAMPLE_THRICE &             // Form value to be used
                   _CANSPI_CONFIG_PHSEG2_PRG_ON &             //  with CANSPIInit
                   _CANSPI_CONFIG_XTD_MSG &
                   _CANSPI_CONFIG_DBL_BUFFER_ON &
                   _CANSPI_CONFIG_VALID_XTD_MSG &
                   _CANSPI_CONFIG_LINE_FILTER_OFF;

  SPI1_Init();                                                                       // initialize SPI1 module

  CANSPIInitialize(1,3,3,3,1,Can_Init_Flags);                                        // initialize external CANSPI module
  CANSPISetOperationMode(_CANSPI_MODE_CONFIG,0xFF);                                  // set CONFIGURATION mode
  CANSPISetMask(_CANSPI_MASK_B1,-1,_CANSPI_CONFIG_XTD_MSG);                          // set all mask1 bits to ones
  CANSPISetMask(_CANSPI_MASK_B2,-1,_CANSPI_CONFIG_XTD_MSG);                          // set all mask2 bits to ones
  CANSPISetFilter(_CANSPI_FILTER_B2_F3,ID_1st,_CANSPI_CONFIG_XTD_MSG);               // set id of filter B2_F3 to 1st node ID

  CANSPISetOperationMode(_CANSPI_MODE_NORMAL,0xFF);                                  // set NORMAL mode
  
  Msg_Rcvd = CANSPIRead(&Rx_ID , RxTx_Data , &Rx_Data_Len, &Can_Rcv_Flags);

  if ((Rx_ID == ID_1st) && Msg_Rcvd) {                                               
  PORTD = 0x01;                                    // if id is valid, port D will have output of 0000 0001  
  }
  else
  PORTD = 0x08;                                    // else port D will have output of 0000 1000
}

The result is 0000 1000, which means node 2 does not received any message from node 1.

I hope you can advise me in this problem. Thanks.

Luc Pattyn10-Jan-11 0:40