Program two or more XC-2 Boards over serial JTAG

[RemoRitzmann]

I'm working on a project that uses 4 XC-2 Kits (4 Nodes, 16 Cores) and need to program them all together. To start I have connected only two XC-2 Development Kits (2 Nodes, 8 Cores) with serialized JTAG (Daisy Chain) the following way:



The XC-2_2board.xn file looks like this:

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>
<Network xmlns="http://www.xmos.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.xmos.com http://www.xmos.com">
  <Type>Board</Type>

  <Declarations>
    <Declaration>core stdcore[8]</Declaration>
  </Declarations>

  <Nodes>
    <Node Id="0" Type="XS1-G4B-FB512">
      <Core Number="0" Reference="stdcore[0]">
        <Port Location="XS1_PORT_1A" Name="PORT_SPI_MISO_1"/>
        <Port Location="XS1_PORT_1B" Name="PORT_SPI_SS_1"/>
        <Port Location="XS1_PORT_1C" Name="PORT_SPI_CLK_1"/>
        <Port Location="XS1_PORT_1D" Name="PORT_SPI_MOSI_1"/>
        <Port Location="XS1_PORT_1E" Name="PORT_BUTTON_LED_0_1"/>
        <Port Location="XS1_PORT_1F" Name="PORT_BUTTON_LED_1_1"/>
        <Port Location="XS1_PORT_1G" Name="PORT_UART_RX_1"/>
        <Port Location="XS1_PORT_1H" Name="PORT_UART_TX_1"/>
        <Port Location="XS1_PORT_1I" Name="PORT_LED_0_0_1"/>
        <Port Location="XS1_PORT_1J" Name="PORT_LED_1_0_1"/>
        <Port Location="XS1_PORT_4C" Name="PORT_BUTTON_A_1"/>
        <Port Location="XS1_PORT_4D" Name="PORT_BUTTON_B_1"/>
      </Core>
      
      <Core Number="1" Reference="stdcore[1]">
        <Port Location="XS1_PORT_1I" Name="PORT_x1ledA"/>
        <Port Location="XS1_PORT_1J" Name="PORT_x1ledB"/>
      </Core>
      
      <Core Number="2" Reference="stdcore[2]">
        <Port Location="XS1_PORT_1A" Name="PORT_SDI07"/>
        <Port Location="XS1_PORT_1K" Name="PORT_ETH_TXCLK_0"/>
        <Port Location="XS1_PORT_1L" Name="PORT_ETH_TXEN_0"/>
        <Port Location="XS1_PORT_1M" Name="PORT_ETH_RXCLK_0"/>
        <Port Location="XS1_PORT_1N" Name="PORT_ETH_RXDV_0"/>
        <Port Location="XS1_PORT_1O" Name="PORT_ETH_RXER_0"/>
        <Port Location="XS1_PORT_1P" Name="PORT_ETH_MDC_0"/>
        <Port Location="XS1_PORT_4E" Name="PORT_ETH_RXD_0"/>
        <Port Location="XS1_PORT_4F" Name="PORT_ETH_TXD_0"/>
        <Port Location="XS1_PORT_8D" Name="PORT_ETH_RST_N_MDIO_0"/>
        <Port Location="XS1_PORT_1I" Name="PORT_x2ledA"/>
        <Port Location="XS1_PORT_1J" Name="PORT_x2ledB"/>
      </Core>
      
      <Core Number="3" Reference="stdcore[3]">
        <Port Location="XS1_PORT_1I" Name="PORT_x3ledA"/>
        <Port Location="XS1_PORT_1J" Name="PORT_x3ledB"/>
      </Core>
    </Node>
    
 <Node Id="1" Type="XS1-G4B-FB512">
      <Core Number="0" Reference="stdcore[4]">
        <Port Location="XS1_PORT_1A" Name="PORT_SPI_MISO_1"/>
        <Port Location="XS1_PORT_1B" Name="PORT_SPI_SS_1"/>
        <Port Location="XS1_PORT_1C" Name="PORT_SPI_CLK_1"/>
        <Port Location="XS1_PORT_1D" Name="PORT_SPI_MOSI_1"/>
        <Port Location="XS1_PORT_1E" Name="PORT_BUTTON_LED_0_1"/>
        <Port Location="XS1_PORT_1F" Name="PORT_BUTTON_LED_1_1"/>
        <Port Location="XS1_PORT_1G" Name="PORT_UART_RX_1"/>
        <Port Location="XS1_PORT_1H" Name="PORT_UART_TX_1"/>
        <Port Location="XS1_PORT_1I" Name="PORT_LED_0_0_1"/>
        <Port Location="XS1_PORT_1J" Name="PORT_LED_1_0_1"/>
        <Port Location="XS1_PORT_4C" Name="PORT_BUTTON_A_1"/>
        <Port Location="XS1_PORT_4D" Name="PORT_BUTTON_B_1"/>
      </Core>
	  
      <Core Number="1" Reference="stdcore[5]">
        <Port Location="XS1_PORT_1I" Name="PORT_LED_0_1_1"/>
        <Port Location="XS1_PORT_1J" Name="PORT_LED_1_1_1"/>
      </Core>
	  
      <Core Number="2" Reference="stdcore[6]">
        <Port Location="XS1_PORT_1I" Name="PORT_LED_0_2_1"/>
        <Port Location="XS1_PORT_1J" Name="PORT_LED_1_2_1"/>
        <Port Location="XS1_PORT_1K" Name="PORT_ETH_TXCLK_1"/>
        <Port Location="XS1_PORT_1L" Name="PORT_ETH_TXEN_1"/>
        <Port Location="XS1_PORT_1M" Name="PORT_ETH_RXCLK_1"/>
        <Port Location="XS1_PORT_1N" Name="PORT_ETH_RXDV_1"/>
        <Port Location="XS1_PORT_1O" Name="PORT_ETH_RXER_1"/>
        <Port Location="XS1_PORT_1P" Name="PORT_ETH_MDC_1"/>
        <Port Location="XS1_PORT_4E" Name="PORT_ETH_RXD_1"/>
        <Port Location="XS1_PORT_4F" Name="PORT_ETH_TXD_1"/>
        <Port Location="XS1_PORT_8D" Name="PORT_ETH_RST_N_MDIO_1"/>
      </Core>
	  
      <Core Number="3" Reference="stdcore[7]">
        <Port Location="XS1_PORT_1I" Name="PORT_LED_0_3_1"/>
        <Port Location="XS1_PORT_1J" Name="PORT_LED_1_3_1"/>
      </Core>
    </Node>
  </Nodes> 

  <Devices>
    <Device NodeId="0" Core="0" Class="SPIFlash" Name="bootFlash_0" Type="AT25DF041A">
      <Attribute Name="PORT_SPI_MISO" Value="PORT_SPI_MISO_0"/>
      <Attribute Name="PORT_SPI_SS"   Value="PORT_SPI_SS_0"/>
      <Attribute Name="PORT_SPI_CLK"  Value="PORT_SPI_CLK_0"/>
      <Attribute Name="PORT_SPI_MOSI" Value="PORT_SPI_MOSI_0"/>
    </Device>
    <Device NodeId="1" Core="0" Class="SPIFlash" Name="bootFlash_1" Type="AT25DF041A">
      <Attribute Name="PORT_SPI_MISO" Value="PORT_SPI_MISO_1"/>
      <Attribute Name="PORT_SPI_SS"   Value="PORT_SPI_SS_1"/>
      <Attribute Name="PORT_SPI_CLK"  Value="PORT_SPI_CLK_1"/>
      <Attribute Name="PORT_SPI_MOSI" Value="PORT_SPI_MOSI_1"/>
    </Device>
  </Devices>

  <Links>
    <Link Encoding="2wire" Delays="4,4">
      <LinkEndpoint NodeId="0" Link="X0LC"/>
      <LinkEndpoint NodeId="1" Link="X0LD"/>
    </Link>
  </Links>

  <JTAGChain>
    <JTAGDevice NodeId="0"/>
    <JTAGDevice NodeId="1"/>
  </JTAGChain>

</Network>

But when I built the program I got the following error message:

xcc -o "SPI.xe" ./src/main.o ./src/Modules/Core00.o ./src/Modules/Core02.o ./src/Modules/Core03.o ./src/Modules/FM02.o ./src/Modules/M01.o ./src/Modules/M02.o ./src/Modules/M04.o ../XC-2_2board.xn
./src/main.o: Error: Specified network is not a recognised topology.

Do you have an idea, what's wrong with that?

[boeserbaer]

I don't have an answer for your problem, but I do think some improved example files and documentation on the XN files would be good. The strength of these processors for my application is treating the various networked cores as a single multi threaded application. I see you are using XC-2s. How well does ethernet work?

Regards, Mike

[RemoRitzmann]

I got a good describing slice out of Tools User Guide (Draft of 10.2) Chapter 3:

toolsuser_en_ch3.pdf

We are in testphase currently, I can report more about the Ethernet later on.

[boeserbaer]

No, I don't speak german, my girlfriend is from Berlin though, so I can get translation.

[boeserbaer]

I don't see any links defined, could that be the problem?

[RemoRitzmann]

Hi all!
I've added the Links Part, but without the expected results. So I've tried some other things but it's still not working. When I Flash I get the error Message:

• Assertion failed: thisNode == bootSite.m_node, file FlashProgrammer.cpp, line 520
  This application has requested the Runtime to terminate it in an unusual way.
  Please contact the application's support team for more information.

When I run the Application the following error message apears:

• xrun: Problem in connection to device

The XTAG Device is recognised as usual but still not works with two XC-2 Boards.
Do I need the XLink connection between the two boards that for? I have not connected Xlink so far and I'm using XTAG, not XTAG2 - can this be a problem?

Have you ever programed 2 or more Devices through Daisy Chain JTAG?
Or do you have any other Ideas?

[RemoRitzmann]

We finaly found the solution:

The JTAG Dasy Chain needs to be connected directly to the first device the following way:

2JTAG_XC-2.png

With this we don't get an error message, but still have problem that it's not working.

Regards
Remo

[bearcat]

Post Removed

[XMatt]

You most likely need to connect the debug pins together with a pull up resistor. This allows for multi core debugging. When a core reaches a breakpoint it toggles the debug pin low to indicate this. Not sure if it's needed for programming, or if the XTAG2 expects it?

You may have an issue with the XTAG2 with multiple processors needing buffers. Not sure if this effects the G4 like it does the L1.

The diagram they have is correct. I don't know where you are getting your information from regarding how they other signals are used but they are not accurate and are only going to confuse when posting them as fact.

[Thomas]

I tested the posted .xn file with 9.9.2 tools and it works.
I attached a xc files running a thread on all 8 cores. So using the above .xn file as 2_G4.xn one can run:
xcc 2_G4.xc 2_G4.xn -o "2_G4.xe"
xsim 2_G4.xe

should print:
I'm a nice thread running on stdcore[1]
I'm a nice thread running on stdcore[2]
I'm a nice thread running on stdcore[3]
I'm a nice thread running on stdcore[4]
I'm a nice thread running on stdcore[5]
I'm a nice thread running on stdcore[6]
I'm a nice thread running on stdcore[7]
I'm a nice thread running on stdcore[0]

Also, the .xn file indicates the system has one flash chip per xcore.
One flash per system is enough because you can boot the other XCores via xlinks.

Booting other cores via xlinks can be done with the .xn file also. This is documented for the upcoming 10.4 tool release but already works in 9.9.2.
Here is more information: http://www.xmos.com/published/xtools_en_ch3
(FYI: "Chapter 3 - Describing Hardware Platforms" on http://www.xmos.com/support/documentation)

I hope this helps.

Cheers, Thomas

2_G4.xc:
#include <platform.h> //Note: This is auto-generated from the .xn file
#include <stdio.h>

void print_stuff(int stdcore) {
printf("I'm a nice thread running on stdcore[%d]\n",stdcore);
}

int main() {
// Create 8 threads using par replicator.
par (int i=0; i<8; i++)
on stdcore : print_stuff(i);
return 0;
}