arm studio build

Dependencies:   libxDot-mbed5

src/main.cpp

Committer:
alan1974
Date:
2018-08-15
Revision:
10:061fab1195e7
Parent:
9:cc23b2049639
Child:
11:77fe4f18a81b

File content as of revision 10:061fab1195e7:

#include "mbed.h"
#include "global.h"
#include "commI2C.h"
#include "dot_util.h"
#include "wbit_util.h"
#include "mDot.h"
#include "RadioEvent.h"
#include "Lora.h"

//nvm storage params
nvm nvmData;
nvm *pNvmData = &nvmData;

bool verbose =  true;
//=======================================================================================================
// enable GPIO for scope trigger
//=======================================================================================================
//#define GPIO_ENABLE
//=======================================================================================================
// configure for either private (test only) or public network (standard)
//=======================================================================================================
//#define MT_PRIVATE_NETWORK          //ENABLE THIS FOR PRIVATE NETWORK

//=======================================================================================================
//code api level and version
//api_level: proc code will not run if api level (last two bytess) greater than what it expects
//=======================================================================================================
uint8_t api_level[4] = { 0x00, 0x00, 0x00, 0x03 };  //api-level, determines if xdot code works with proc code
uint8_t ver_level[4] = { 0x00, 0x00, 0x00, 0x07 };  //updated for every code check-in

//=======================================================================================================
//configuring mbed pinsa; https://docs.mbed.com/docs/mbed-os-api-reference/en/latest/APIs/io/DigitalInOut/
// * these options must match the settings on your gateway //
// * edit their values to match your configuration         //
// * frequency sub band is only relevant for the 915 bands //
// * either the network name and passphrase can be used or //
//     the network ID (8 bytes) and KEY (16 bytes)         //
//=======================================================================================================
static std::string network_name = "asdfqwer";  //not used
static std::string network_passphrase = "zxcvasdf"; //not used
/*
uint8_t network_id[] = { 0x90, 0xF1, 0x47, 0x90, 0x6C, 0x48, 0x1D, 0x29 };   //static id not used anymore but don't comment out                                
//OTAA keys
uint8_t network_key[] = { 0x0F, 0xF9, 0xA2, 0x90, 0x2E, 0xAA, 0x6B, 0x8C, 0x6A, 0x4E, 0xFD, 0x67, 0xF9, 0xA6, 0xF3, 0xD3 };   //appkey                              
*/

#ifdef MT_PRIVATE_NETWORK
static uint8_t frequency_sub_band = 4; 
static bool public_network = false;
static uint8_t ack = 1; //0;
#else
uint8_t frequency_sub_band = 1; 
bool public_network = true; //false
uint8_t ack = 1; //0;
uint8_t link_check_treshold = 100; //5;
#endif

bool adr = false;    //set adaptive data rate
//=======================================================================================================
// -need to add a delay between exiting i2c read->proc and before putting xdot to sleep to allow for final
//  xfr of bytes in i2c buffer to be xfrd to proc. If log output enabled then it causes enough delay when
//  it prints status info to make the delay ok. For now add this delay when both log enabled and disabled.
int16_t wait_before_sleep_usec =  10000;  
//=======================================================================================================
// deepsleep consumes slightly less current than sleep
// in sleep mode, IO state is maintained, RAM is retained, and application will resume after waking up
// in deepsleep mode, IOs float, RAM is lost, and application will start from beginning after waking up
// if deep_sleep == true, device will enter deepsleep mode
// asb:
//  no longer use deepsleep since we want to retain state
//  sleep uses only 1uA more current than deepsleep
//=======================================================================================================
static bool deep_sleep = false; //false;

uint32_t packets_sent = 0;
uint32_t acks_rcvd = 0;
int8_t   rssi =0;           //rssi of last rcvd rx1/rx2
std::string eui = " ";
static bool led_enabled = false; //true; //false;
mDot* dot = NULL;
lora::ChannelPlan* plan = NULL;
uint8_t buf_xmt[BUFFER_SIZE_I2C];  //outgoing data
uint8_t buf_rcv[BUFFER_SIZE_I2C];  //incoming data
std::vector<uint8_t> upstream_packet; 

#ifdef GPIO_ENABLE
DigitalInOut gpio1(PA_5);  //scope debug PA-5 is connected to SW1 pads on Loren v04 and can be used for scope debug
#endif

Serial pc(USBTX, USBRX);   //serial port output

//==================================================================================
//chksum
//compute checksum over i2c buffer except for last byte (chksum byte)
//==================================================================================
uint8_t chksum_proc(uint8_t *bfr_xdot){
    uint8_t i;
    uint8_t chksum = 0;
    for (i=0; i < BUFFER_SIZE_I2C-1;i++)chksum += bfr_xdot[i];//good code   
    return chksum;
} 
//=================================================================================================
//cfg_network:
// configure the network public/private and sub-band
// bForceCfg : true => force a network cfg
//           false => only change if bPublic or sub_band have changed
// bPublic : true if network is public, else private
// sub_band: sub band number (1..8)

// NOTE: THIS ONLY WORKS WHEN THE XDOT BOOTS UP. IT DOES NOT WORK WHEN TRYING TO CHANGE AFTER.
// NOT SURE WHY...WHEN THE XDOT REJOINS IT SHOULD USE NEW SESSION SETTINGS... asb
//
//asb:dec 2017: try this later and see if it works:mdot.h: 
//   int32_t setPublicNetwork(const bool& on);
//    bool getPublicNetwork();
//    int32_t setFrequencySubBand(const uint8_t& band);
//=================================================================================================
bool cfg_network(bool bForceCfg,bool bPublic,uint8_t sub_band){
// if bForceCfg false and network parameters haven't changed then just exit
    if (!bForceCfg){
        if(verbose)pc.printf("no configuration change needed subband the same");
        if ((public_network ==bPublic) && (frequency_sub_band ==sub_band))return true;           
    }         
    if(verbose)pc.printf("changing to subband: %d\r\n",sub_band);
// update network settings   
    public_network = bPublic;
    frequency_sub_band =sub_band;
// start from a well-known state
    logInfo("defaulting Dot configuration");
    //dot->resetConfig();             //reset config to factory default not used for v0307
    // test dot->resetNetworkSession();     //Reset current network session, essentially disconnecting from the network
        
    if (dot->getJoinMode() != mDot::OTA) {  // update configuration if necessary
        logInfo("changing network join mode to OTA");
        if (dot->setJoinMode(mDot::OTA) != mDot::MDOT_OK) {
            logError("failed to set network join mode to OTA");
            return false;
        }
    }    
// in OTA and AUTO_OTA join modes, the credentials can be passed to the library as a name and passphrase or an ID and KEY
// only one method or the other should be used!
    if (public_network){
   //     update_ota_config_id_key(network_id, network_key, frequency_sub_band, public_network, ack);
        update_ota_config_id_key(nvmData.network_id,nvmData.network_key, frequency_sub_band, public_network, ack);
        logInfo("--------------  network configured for public access -----------------------------");
    }    
    else{
        update_ota_config_name_phrase(network_name, network_passphrase, frequency_sub_band, public_network, ack);
        logInfo("--------------  network configured for private access -------------------------------");
    }               
// configure network link check count
// declares the Dot disconnected if no acks received within link_check_treshold transmits
    //update_network_link_check_config(3, 5);
    dot->setLinkCheckThreshold(link_check_treshold);


        
/*  done thru radio cmds        
// save changes to configuration
        logInfo("saving configuration");
        if (!dot->saveConfig()) {
            logError("failed to save configuration");
            return false;
        }        
        display_config();
*/        
        return true;
}    

//=================================================================================================
//main()
// main() runs in its own thread in the OS
// (note the calls to wait below for delays)
//=================================================================================================
int main() {
    uint8_t i;
    RadioEvent events;
    
    mDotEvent  mdotevent;   //used to get ping info????
    plan = new lora::ChannelPlan_US915();
#ifdef GPIO_ENABLE   
    gpio1.output();    
    gpio1 =0;         
#endif    

    pc.baud(115200); 
    pc.printf("\r\n**********************************************************\r\n");
    pc.printf("\r\n XDOT BOOT\r\n");
    pc.printf("COMM api_level = <HEX> %x.%x.%x.%x\r\n",api_level[0],api_level[1],api_level[2],api_level[3]);
    pc.printf("COMM version   =       %x.%x.%x.%x\r\n",ver_level[0],ver_level[1],ver_level[2],ver_level[3]);
    pc.printf("**********************************************************\r\n");   
    assert(plan);
    dot = mDot::getInstance(plan);
    assert(dot);  
      
    dot->setEvents(&events);        
    nvmRead(pNvmData);

    if (pNvmData->bLogOutputOn == 0){
        pc.printf("\r\nDISABLING TERMINAL OUTPUT\r\n");
        dot->setLogLevel(mts::MTSLog::NONE_LEVEL);         //doesn't work
        //dot->setLogLevel((true) ? mts::MTSLog::INFO_LEVEL : mts::MTSLog::INFO_LEVEL); //!!!!!!!!!!!! this works
        //dot->setLogLevel((true) ? mts::MTSLog::TRACE_LEVEL : mts::MTSLog::TRACE_LEVEL); //!!!!!!!!!!!! this works
        verbose = false;
    }             
    else{
       printNmvData(pNvmData);
       dot->setLogLevel((verbose) ? mts::MTSLog::TRACE_LEVEL : mts::MTSLog::TRACE_LEVEL);  // TRACE_LEVEL        , INFO_LEVEL       
    }
//restore defaults after xdot reset    
  //   dot->resetConfig(); //TEST !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! must upload new cfg after each xdot reset if use this !
  //   dot->setFrequencySubBand(frequency_sub_band);  //set default freq band
  //   dot->setAdr(1); //test
     
          
// getStandbyFlag() should return the state of the standby flag directly from the processor
// Standby flag: This bit is set by hardware and cleared only by a POR/PDR (power on reset/power down reset) or by setting the CSBF bit in the PWR power control register (PWR_CR)
//  0: Device has not been in Standby mode
//  1: Device has been in Standby mode
//  The xDot should enter standby mode when deep sleep in invoked. So you should see the standby flag set if it came out of deep sleep.
    if (!dot->getStandbyFlag()) {  //if 0 => power-up/reset which should always be the case at this point
        logInfo("mbed-os library version: %d", MBED_LIBRARY_VERSION);        
        frequency_sub_band = dot->getFrequencySubBand();      
        printRadioCfg();  
        cfg_network(true,public_network,frequency_sub_band);  //force network cfg,
    } else {
        // restore the saved session (join OTAA info) if the dot woke from deepsleep mode
        // useful to use with deepsleep because session info is otherwise lost when the dot enters deepsleep
        logInfo("restoring network session from NVM");
        dot->restoreNetworkSession();
    }
//--------------------------------------------------------------------------------------------------------------------------------------------
// configure network link check count
// declares the Dot disconnected if no acks received within link_check_treshold transmits
    //update_network_link_check_config(3, 5);
    dot->setLinkCheckThreshold(link_check_treshold);
//----------------------------------------------------------------------------------------------------------------------------------------------

// save changes to configuration
//    logInfo("saving configuration");
  
   eui = mts::Text::bin2hexString(dot->getDeviceId()).c_str();
   if(verbose)pc.printf("\r\nEUI: %s\r\n",eui);       
   bool joined = false;        
   
   i2c_proc_init();  //init i2c comm  
   sleep_wake_interrupt_only(deep_sleep); //wake on rising edge of wake signal from proc
//scope test    
#ifdef GPIO_ENABLE 
        gpio1 =1;
#endif
//==============================================================================
//  -loop here forever
//       -sleep until LORA_WAKE goes hi => proc ready to send i2c cmd
//       -start polling incoming i2c bus for proc cmd
//       -execute cmd
//       -take control of LORA_WAKE and toggle it hi to signal proc that xdot
//        ready to send i2c ack message
//       -go back to sleep
//==============================================================================
    bool bPulseLoraWake = false;
    while(1)
    {    
        if(verbose)pc.printf("\n\r ***************************** ");       
          
        switch (i2c_proc_comm()){
            case I2C_WRITE:                 //xdot ack ->proc                                  
                if(verbose)pc.printf("\n\r xdot ack -> proc done,going to sleep\n\r ");  
                bPulseLoraWake = false;                
#ifdef GPIO_ENABLE
               gpio1 =0; 
#endif
                wait_us(wait_before_sleep_usec); //wait for i2c to complete data transfer before sleeping
                sleep_wake_interrupt_only(deep_sleep);   ////sleep until rising edge of wake signal from proc
#ifdef GPIO_ENABLE
              gpio1 =1;  
#endif
                if(verbose)pc.printf("\n\r lora wake detected -> monitoring i2c bus\n\r ");                                                                 
                break;                            
            case I2C_READ:      //xdot <- proc  
                bPulseLoraWake = true;                    
                switch (buf_rcv[0])
                {
                    case XDOT_CMD_XMIT_PKT:    
                        pkt_upstrm  *pUp= (pkt_upstrm*)&buf_rcv[0];                  
                        for (i=0; i < sizeof(buf_xmt);i++)buf_xmt[i] = 0xff;   //bfr fill            
                        pkt_ack *pAck = (pkt_ack*)&buf_xmt[0];                                                                
                        pAck->ack = I2C_ACK_PROC;
                        pAck->cmd = XDOT_CMD_XMIT_PKT;                                                             
                        pAck->dataLen = pUp->dataLen; //data len of xmitted pkt                                  
                        if(verbose)pc.printf("\r\npkt to xmit data len: %d\r\n",pAck->dataLen);                                                
                        uint8_t chksum = chksum_proc(buf_rcv);                        
                        if(verbose)pc.printf("\r\nI2C chksum rcvd/computer: %d/%d ",pUp->chksum,chksum);                                               
                        pAck->bXmitAttempted = 1;                            
                        pAck->chksum_err = 0;
                        if(pUp->chksum != chksum){
                            if(verbose)pc.printf(" chksum err, aborting xmit");  
                            pAck->bXmitAttempted = 0;                                                  
                            pAck->mdot_ret = -2048;  //wbit rtn code?
                            pAck->chksum_err = 1;
                            break;
                        }
//rev 0307 parameters  
                        if(verbose)pc.printf("\n\r setting application port %d ",pUp->appPort);  //appPort not used in rev < 0307                                 
                        dot->setAppPort(pUp->appPort);
                        uint8_t linkThresholdCnt =  pUp->linkThreshCnt; 
                        if(verbose)pc.printf("\r\n linkThreshCnt %d\r\n",linkThresholdCnt); 
                        //if (pUp->bResetLinkCCounter){
                            //dot->setLinkFailCount(0);
                        dot->setLinkCheckThreshold(linkThresholdCnt);
                          //  if(verbose)pc.printf("\r\n reset link fail threshold to zero"); 
                        //}                                                
                        if (pUp->dataLen ==  0){ //datalen  non zero?                               
                            pAck->bXmitAttempted = 0;                            
                            break;
                        }    
                        upstream_packet.clear();    //xfr data from incoming bfr to xmit bfr
                        for (i=0; i< pUp->dataLen;i++) upstream_packet.push_back(pUp->txData[i]);                                  
                        
                        if(verbose){
                            pc.printf("\r\n[TEST],Upstream Packet Received");                     
                            for(std::vector<uint8_t>::iterator it = upstream_packet.begin(); it != upstream_packet.end(); ++it)
                            pc.printf(",0x%x", *it);                                 
                            pc.printf("\r\n"); // see i told you.       
                        }
                        joined = dot->getNetworkJoinStatus();   //are we joined to Lorawan?
                        pAck->joinAttempts = 0;                 //no attempts made yet to join                
                        pAck->bAck = 0;                         //won't know if we receive a lorawan ack until after xmit
                        pAck->bAckdata = 0;                     //won't know if we receive a lorawan ack downstream data until after xmit
                        pAck->rssi = 0;                         //if not rx1/rx2 then no RSSI value 
                        pAck->snr  = 0;                         //if not rx1/rx2 then no SNR value                             
                        if(!joined) {                           //if not previously joined, then need to join now
                            pAck->bJoined = 0;                 
                            if(verbose)pc.printf("\r\n----------- NETWORK NOT JOINED YET, WILL TRY TO JOIN %d TIMES\r\n",pUp->joinAttemps);                                                            
                            joined = join_network_wbit(pUp->joinAttemps);
                            pAck->joinAttempts = join_network_attempts_wbit();
                            pAck->mdot_ret = dot->send(upstream_packet);
                            if (!joined)
                               if(verbose)pc.printf("\r\n----------- FAILED TO JOIN...GIVING UP\r\n");  // join network if not joined                                                         
                        }         
                        if (joined){          
                            pAck->bJoined = 1;      //we are joined to the network                            
                            packets_sent++;  
 //send packet
 //return code indicates results, send return code back to proc Dec14,2017
                            pAck->mdot_ret = dot->send(upstream_packet);  //xmit the pkt in blocking mode, return false if no ack     
                            if (verbose)printf("\n\rdata->send() return code: %d\r\n",pAck->mdot_ret);                                     
                            if (pAck->mdot_ret == mDot::MDOT_OK){                                                                                         
                                acks_rcvd++;
                                pAck->bAck = 1;                //we got a Rx1 or Rx2 ack                           
                                mDot::rssi_stats rssiStats = dot->getRssiStats();        //rssi stat   
                                pAck->rssi = (int8_t)rssiStats.last;  
                                mDot::snr_stats snrStats = dot->getSnrStats();        //snr stat                                                                       
                                pAck->snr = (int8_t)snrStats.last;  
                                if (verbose)printf("\n\rdata->send()=true; ack:%d, rssi:%d snr:%d\r\n",pAck->bAck,pAck->rssi,pAck->snr);                                                                     
                                if (events.is_packet_received()){    //downstream data from the Rx1/Rx2 pkt?                                     
                                    if (verbose)printf("\n\revents.is_packet_received = true\r\n");                                       
                                    pAck->bAckdata = 1;                                          
                                    upstream_packet.clear();    
                                    upstream_packet = events.get_downstream_packet();
                                    pAck->rxLen = upstream_packet.size();     
                                    if (pAck->rxLen > I2C_MAX_ACK_DATA){
                                        if(verbose)pc.printf("\r\n got ack with pkt data too large.. rejected\r\n");
                                        break;  
                                    }                                                                            
                                    if(verbose){
                                        pc.printf("\r\n pkt data: ");                                  
                                        for (i=0; i< pAck->rxLen;i++) {
                                            pAck->rxData[i]= upstream_packet[i]; 
                                            pc.printf(" %x",pAck->rxData[i]);                                                                                                              
                                        } 
                                    }
                                } //if  downstream data rcvd                                     
                                else{
                                    if (verbose)printf("\n\revents.is_packet_received ()=  false => ack rcvd but no data\r\n");                                                                             
                                }                                        
                             } //send() 
                             else{
                                if (verbose)printf("\n\rdata->send()=  false => no ack\r\n");     //could be some other error                                    
                             }                                                                 
                          }//if joined
                        break;
                    case XDOT_CMD_SET_RADIO:
                        if(verbose)pc.printf("\n\r proc cmd: CMD_SET_RADIO");  
                        pkt_setradiodwn *pDwnRadio= (pkt_setradiodwn*)&buf_xmt[0];                                 
                        pkt_setradioup  *pUpRadio = (pkt_setradioup*)&buf_rcv[0];                                
                        pDwnRadio->ack = I2C_ACK_PROC;
                        pDwnRadio->cmd = XDOT_CMD_SET_RADIO;

                        if (pUpRadio->bSetParams){
                            if(verbose)pc.printf("\n\r setting radio params");    
                            if(verbose)pc.printf("\n\r setting adr to %d ",pUpRadio->params.aDR);    
                            if (pUpRadio->params.aDR == 1) dot->setAdr(true);   //test for adr problem
                            else                           dot->setAdr(false);                               
                            dot->setAdr((uint8_t)pUpRadio->params.aDR);  // enable or disable Adaptive Data Rate
                            if(verbose)pc.printf("\n\r setting subband to %d ",pUpRadio->params.sub_band);                                   
                            cfg_network(false,true,(uint8_t)pUpRadio->params.sub_band);                                                
                            
                            if(verbose)pc.printf("\n\r setting public/private network to %d ",pUpRadio->params.public_network);
                            //public_network = (bool)pUpRadio->params.public_network;
                            dot->setPublicNetwork((bool)pUpRadio->params.public_network);
                                                                                   
                            if(verbose)pc.printf("\n\r setting antenna gain to %d ",pUpRadio->params.antennaGaindBi);                                   
                            dot->setAntennaGain(pUpRadio->params.antennaGaindBi);
                            if(verbose)pc.printf("\n\r setting radio tx power to %d ",pUpRadio->params.txPower);                                   
                            dot->setTxPower(pUpRadio->params.txPower);
                            if(verbose)pc.printf("\n\r setting tx datarate to %d ",pUpRadio->params.dataRate);                                   
                            dot->setTxDataRate(pUpRadio->params.dataRate);                         
                            if(verbose)pc.printf("\n\r setting tx inverted to %d ",(bool)pUpRadio->params.txInverted);                                   
                            dot->setTxInverted((bool)pUpRadio->params.txInverted);                         
                            if(verbose)pc.printf("\n\r setting rx inverted to %d ",(bool)pUpRadio->params.rxInverted);                                   
                            dot->setRxInverted((bool)pUpRadio->params.rxInverted);                         
                            if(verbose)pc.printf("\n\r setting rx delay to %d ",pUpRadio->params.rxDelay);                                   
                            dot->setRxDelay(pUpRadio->params.rxDelay);                         
                            if(verbose)pc.printf("\n\r setting join delay to %d ",pUpRadio->params.join_delay);                                   
                            dot->setJoinDelay(pUpRadio->params.join_delay);                                                                                                              
                            if(verbose)pc.printf("\n\r saving configuration");
                            if (!dot->saveConfig())logError("failed to save configuration");                                                        
                            
                            display_config();                              
                        }
                        if(verbose)pc.printf("\n\r reading radio params");    
                        pDwnRadio->params.public_network = public_network;
                        pDwnRadio->params.sub_band = dot->getFrequencySubBand();
                        pDwnRadio->params.join_delay = dot->getJoinDelay();
                        pDwnRadio->params.txInverted = dot->getTxInverted();
                        pDwnRadio->params.rxInverted = dot->getRxInverted();
                        pDwnRadio->params.rxDelay = dot->getRxDelay();                      
                        pDwnRadio->params.maxDataLen = dot->getMaxPacketLength();                   
                        pDwnRadio->params.maxTxPowerdBm = dot->getMaxTxPower();
                        pDwnRadio->params.minTxPowerdBm = dot->getMinTxPower();
                        pDwnRadio->params.aDR = dot->getAdr();
                        pDwnRadio->params.antennaGaindBi = dot->getAntennaGain();
                        pDwnRadio->params.txPower = dot->getTxPower();    //programmed tx power (non-adr)                  
                        pDwnRadio->params.dataRate = dot->getTxDataRate();   //programmed data rate (non-adr)                
                        pDwnRadio->params.dataRateCurrent = dot->getSettings()->Session.TxDatarate;  //presently used data rate (adr can change this);see Lora.h                        
                        pDwnRadio->params.txPowerCurrent = dot->getSettings()->Session.TxPower;//presently used tx power  (adr can change this);see Lora.h                        
                        pDwnRadio->params.rx1DelayCurrent = dot->getSettings()->Session.RxDelay;//presently used rx1_delay;see Lora.h                        

                        
                        break;    
                    case XDOT_CMD_GET_EUI:   //0307: modified to include radio parameter settings   
                        if(verbose)pc.printf("\n\r proc cmd: get EUI");                        
                        pkt_eui *peui = (pkt_eui*)&buf_xmt[0];                                
                        peui->ack = I2C_ACK_PROC;
                        peui->cmd = XDOT_CMD_GET_EUI;
                        upstream_packet.clear(); 
                        upstream_packet = dot->getDeviceId();                                                
                        peui->dataLen = upstream_packet.size();                           
                        for (i=0; i< peui->dataLen;i++) peui->euiData[i] = upstream_packet[i];  
                        for (i=0; i< 4;i++) peui->apiLvlData[i] =  api_level[i];
                        for (i=0; i< 4;i++) peui->verLvlData[i] =  ver_level[i];
                        peui->dataLen = sizeof(pkt_eui)-3;  //size of struc minus first 3 bytes                                      
                        if(verbose)pc.printf("\n\r eui data length: %d",peui->dataLen);                                                                                                                                              
                        break;    
                    case XDOT_CMD_NVM:
                        if(verbose)pc.printf("\n\r proc cmd: NVM");                                                
                        pkt_setnvmup  *pUpNvm = (pkt_setnvmup*)&buf_rcv[0];                
                        pkt_setnvmdwn *pDwnNvm= (pkt_setnvmdwn*)&buf_xmt[0];                                                 
                        pDwnNvm->ack = I2C_ACK_PROC;
                        pDwnNvm->cmd = XDOT_CMD_NVM;
                        pDwnNvm->dataLen = sizeof(nvm)-2;
                        if (pUpNvm->nvm_option == XDOT_NVM_SET)     nvmWrite(&pUpNvm->nvmData);
                        if (pUpNvm->nvm_option == XDOT_NVM_RESTORE) nvmRestore(&pUpNvm->nvmData);
                            
                        pDwnNvm->bChkSumOK = 0;        
                        if (nvmRead(&pDwnNvm->nvmData))
                            pDwnNvm->bChkSumOK = 1;    
                        printNmvData(&pDwnNvm->nvmData);    
                        break;                            
                    case XDOT_CMD_SET_NTWKSESS:  //read or write network seesion to xdot flash
                        bool bWriteSession = (bool)buf_rcv[1];
                        if (bWriteSession){
                             if(verbose)pc.printf("\n\r proc cmd writing network sesion to flash");                        
                             dot->saveNetworkSession();
                        }     
                        else{
                            if(verbose)pc.printf("\n\r reading network session from flash");                        
                            dot->restoreNetworkSession();
                        }    
                        pkt_ntwrk *pktwrk = (pkt_ntwrk*)&buf_xmt[0];  
                        pktwrk->ack = I2C_ACK_PROC;
                        pktwrk->cmd = XDOT_CMD_SET_NTWKSESS;
                        pktwrk->bSetNetwrk = (uint8_t)bWriteSession;                        
                        break;                        
                    case XDOT_CMD_SET_KEY_X:
                        if(verbose)pc.printf("\n\r proc cmd: this command not used\r\n");                                  
                        wait_ms(I2C_MIN_WAIT_DELAY);
                        buf_xmt[0] = I2C_ACK_PROC;
                        buf_xmt[1] = XDOT_CMD_SET_KEY_X;
                        break;                       
                    case XDOT_CMD_GATEWAY_PING:
                        if(verbose)pc.printf("\n\r proc cmd: xmit gateway ping\r\n");   
                        pkt_ping *pPing = (pkt_ping*)&buf_xmt[0];                                
                        pPing->ack = I2C_ACK_PROC;
                        pPing->cmd = XDOT_CMD_GATEWAY_PING;
                        pPing->dataLen = 3;  //only 3 bytes returned
                        if(verbose)pc.printf("\r\n----------- SENDING GATEWAY PING \r\n");  
                        mDot::ping_response ping_res;
                        ping_res = dot->ping();
                        pPing->status = (int8_t)ping_res.status;
                        pPing->rssi = (int8_t)ping_res.rssi;
                        pPing->snr = (int8_t)ping_res.snr;          
                        if (ping_res.status == 0)            
                            if(verbose)pc.printf("\r\n----------- GATEWAY PING SUCCEEDED \r\n");  
                        else
                            if(verbose)pc.printf("\r\n----------- GATEWAY PING FAIL \r\n");  
                        break;                         
                    default:
                        if(verbose)pc.printf("\n\r proc cmd not recognized:%x",buf_rcv[0]);  
                        wait_ms(I2C_MIN_WAIT_DELAY);
                        buf_xmt[0] = I2C_ACK_PROC;
                        buf_xmt[1] = XDOT_CMD_UNDEFINED;
                } //switch buf_rcv[0]
                //gpio1 =1;       //test
                if (bPulseLoraWake) i2c_pulse_wake(); //pulse wake-up lo->hi->lo to signal proc that xdot ready to send ack
                
        } //switch i2c_proc_comm
    } //while 

} //main