industrialNETworX

Hi,

I'm trying to get a PROFIBUS connection on my NXHX-500 which is connected to another uP via Host-Interface (DPM mode).

Unfortunately the DPM manual (netX_DPM_Interface_Rev04.pdf) is not very clear about what flags have to be set in order to get the DPM really working. It would be helpful to know what the xChannel functions listed below actually do.

On the netSTICK, I activate a PROFIBUS connection as follows:

      /* Toggle Application Ready State Flag */
      lRet = xChannelHostState(hChannel, CIFX_HOST_STATE_READY, &ulState, ulTimeout);
      if(lRet == CIFX_DEV_NOT_RUNNING)
      {
        /* reset the communication channel before send Warmstart Paramenters */
        lRet = xChannelReset(hChannel, CIFX_CHANNELINIT, ulTimeout);


        /* Set Fieldbus Warmstart Parameters Packet */

        DeviceControlCommProto_SetFBWarmstartParamsPkt(ptRsc, (void*)&tSendPkt);

        /* send Fieldbus Warmstart Request Packet */

        lRet = xChannelPutPacket(hChannel, &tSendPkt, 3000);

        /* Get Fieldbus Warmstart Response Packet */

        lRet = xChannelGetPacket(hChannel, sizeof(tRecvPkt), (void*)&tRecvPkt, 3000);

        /* Toggle Application Ready State Flag */

        lRet = xChannelHostState(hChannel, CIFX_HOST_STATE_READY, &ulState, ulTimeout);

      }

My attempt to build a set of functions to replace the xChannel functions in the code:

for xChannelHostState:

#define APP_COS 0x0308
#define HOST_FLAGS 0x020A


void set_host_state(unsigned long cmd, unsigned long *state) {

  switch(cmd) {

    case HOST_STATE_NOT_READY:

      DPM_ENABLE;

      // set APP_COS_APP_READY flag to zero

      *(unsigned long *)DPM_ADR(APP_COS) &= 0x7F;

      DPM_DISABLE;

      break;

    case HOST_STATE_READY:

      DPM_ENABLE;

      // set APP_COS_APP_READY flag to one

      *(unsigned long *)DPM_ADR(APP_COS) |= 0x1;

      DPM_DISABLE;

      break;

    default:

      DPM_ENABLE;

      *state = (*(unsigned long *)DPM_ADR(APP_COS) & 0x1);

      DPM_DISABLE;

  }

  DPM_ENABLE;

  *(unsigned short*)DPM_ADR(HOST_FLAGS) |= 0x4;

  DPM_DISABLE;

  return;

}

DPM_ENABLE and DPM_DISABLE are for the chip-select signal...
DPM_ADR maps the DPM addresses to the corresponding address range of my uP.

Then the cifX Device Driver Manual says that xChannelHostState returns either CIFX_NO_ERROR or CIFX_NO_COM_FLAG. But in the code fragment from the netSTICK app it is checked against CIFX_DEV_NOT_RUNNING. Why?

For xChannelReset:

void comm_channel_reset() {
  DPM_ENABLE;
  *(unsigned long*)DPM_ADR(APP_COS) |= 0x18;
  *(unsigned short*)DPM_ADR(HOST_FLAGS) |= 0x4;
  DPM_DISABLE;
  return;
}

For xChannelPutPacket

void send_packet(int len, char *data) {
  DPM_ENABLE;
  memcpy((void*)SEND_MBX, data, len);
  DPM_DISABLE;
  return;
}

Do I have to work with the CMD and ACK flags for this function to work? The DPM manual wasn't very clear about that.

For xChannelGetPacket

void recv_packet(int len, char *dest) {
  DPM_ENABLE;
  memcpy(dest, (void const *)RECV_MBX, len);
  DPM_DISABLE;
  return;
}

I hope someone can help me on this...

Thanks,

simon