File content as of revision 15:a448e955b8f3:

#include "mbed.h"
#include "rtos.h"
#include "OBD.h"
#include "Lora.h"
#include "Accelerometer.h"
#include "Beacon.h"
#include "main.h"

//Datatype typecasting
typedef unsigned char uint8;
typedef unsigned int uint16;

//peripheral connection 
DigitalOut led1(LED1);
DigitalOut led2(LED2);

//Configure Serial port
 RawSerial LORA_UART(PA_0, PA_1);//USART4_TX->PA_0,USART4_RX->PA_1      :       Used for Lora module command sending and reception from gateway
 RawSerial DEBUG_UART(PA_9, PA_10);//USART1_TX->PA_9,USART1_RX->PA_10   :       Used for debugging purpose only
 RawSerial Beacon_UART(PC_4, PC_5);//USART3_TX->PC4,USART3_RX->PC_5     :       Used for sending command to beacon module
 RawSerial BLE_RECEIVER_UART(PA_0, PA_1);//USART4_TX->PA_0,USART4_RX->PA_1      :       Used for Lora module command sending and reception from gateway
 
 //InterruptIn OBD_PLUGIN_INTERRUPT_PIN(PC_13);
 InterruptIn CheckIn_Interrupt(PC_13);
  
 uint8 Ticker_Count = 0;    //Variable to count for timer overflows

 
 uint8 OBD_Plugin_Detected = FALSE;
 
 //Create Object for structure of Lora Packet to be sent

 static uint16 Calculate_Wheels_RPM(uint8* Buffer);
 void flip_Packet_Sending_Flag();
 void Lora_Periodic_Packet_Sending_thread(void const *args);

 void Lora_Rcvd_Cmd_Processing_thread(void);// const *args);
 void Enable_CheckIN_Packet_Sending();   
 
 uint8 GET_RSSI[]= {0x41,0x54,0x01,0x01,0x0D,0x0A};
/*************************Accelerometer related definitions***********************************/
//Accelerometer related definitions

#define DOUBLE_TAP_INTERRUPT        0x20
#define ACTIVITY_INTERRUPT          0x10
#define INACTIVITY_INTERRUPT        0x08

#define TAP_THRESHOLD               75 
#define ACTIVITY_THRESHOLD          64      // THRES_ACT register value 62.5mg/LSB , therfore value 32 indicates 2g activity
#define INACTIVITY_THRESHOLD        50

#define DUR_TIME                    0x15    // DUR Register value providing maximum time to be held to generate an interrupt
#define LATENT_TIME                 0x15    // The interrupt latency
#define WINDOW_TIME                 0x45    // The time of the interrupt window in which the next tap will be detected 
#define INACTIVITY_VALIDATION_TIME  5       // The time until which the acceleration must be held below the inactivity threshold to generate an inactvity interrupt
                                            // Here the value 5 indicates literally 5 secs
#define X_AXIS_OFFSET               0x7F
#define Y_AXIS_OFFSET               0x7F
#define Z_AXIS_OFFSET               0x05


I2C i2c(PB_9, PB_8);
RawSerial DEBUG_UART1(PA_9, PA_10);//USART1_TX->PA_9,USART1_RX->PA_10

InterruptIn activity(PB_0); 
InterruptIn inactivity(PA_4); // As for now only this is used
DigitalOut led(LED1);

const int slave_address_acc = 0xA6;
char axis_data[6] = {0,0,0,0,0,0};

char interrupt_source[2];
char axis_data_start_address[2] = {0x32, 0};
char intr_source_address[2] = {0x30, 0};
char all_interrupt_clear_command[2] = {0x2E, 0x00};
char all_interrupt_enable_command[2] = {0x2E, 0x38};
char activity_interrupt_disable_command[2] = {0x2E, 0x08};
char inactivity_interrupt_disable_command[2] = {0x2E, 0x30};
char accelerometer_status_registered = 0;
unsigned int interrupt_source_duplicate;

char threshold_offset_command[5];
char act_inact_time_config_command[8];
char interrupt_enable_command[3];
char tap_axis_enable_command[2];
char baud_rate_command[2];
char data_format_command[2];
char measure_bit_on_command[2];


char previous_state = 0;
char current_state = 0;

unsigned char vehicle_speed = 25;                                       // Kmph
unsigned char current_speed, previous_speed, speed_threshold = 10;      // Kmph

unsigned char x_axis, y_axis, z_axis;

unsigned char Motion_Detect_Status = FALSE;
uint8 OBD_PlugInOut_IOC_Status = FALSE;
unsigned char Motion_Type_Detected = MOTION_TYPE_UNKNOWN;    //By default set motion type as unknown
void Accelerometer_Process_thread();//void const *args) ;

 #define BLE_RECEIVER_UART_RX_Size 100
 uint8 BLE_RxBuffer_End_Pos = 0;
 char BLE_Receiver_UART_RX_Buffer[BLE_RECEIVER_UART_RX_Size];

//This function is Interrupt routine for detecting motion(acceleartion), i.e. either starts from rest/vehicle stops afeter running or if sudden jurk is detected
void interrupt_activity_inactivity()
{   
    i2c.write(slave_address_acc, all_interrupt_clear_command, 2);  
    Motion_Detect_Status = TRUE;  
}


/************************************************************************/ 
uint8 Command_Sent[100];
uint8 Command_Length_Sent;
uint8 Checkin_Detect_Status = FALSE;
void Extract_Received_Lora_Response(void);
 
 //This function is Interrupt routine for detecting OBD Plugin and Out
void Handle_CheckIn_Interrupt()
{    
    OBD_PlugInOut_IOC_Status = TRUE;
    DEBUG_UART.printf("Movement_Detected");
}

 //Declare Ticker for sending lora packet
 Ticker Lora_Packet_Sending_Ticker;
 void flip_Packet_Sending_Flag(void) 
 { //flip function
    if(Ticker_Count < 5)
    {
        Ticker_Count++;
    }
    else
    {
        Ticker_Count = 0;
        Send_Lora_Packet_Flag = TRUE;
    }
 }

// called every time a byte is received from lora module.
void Lora_onDataRx()
{
    while (LORA_UART.readable()) 
    { // while there is data waiting
        LORA_UART_RX_Buffer[Lora_RxBuffer_End_Pos++] = LORA_UART.getc(); // put it in the buffer
        //DEBUG_UART.putc(LORA_UART_RX_Buffer[Lora_RxBuffer_End_Pos-1]);
        if(Lora_RxBuffer_End_Pos >= LORA_UART_RX_Size)
        {
            // BUFFER OVERFLOW. What goes here depends on how you want to cope with that situation.
            // For now just throw everything away.
            Lora_RxBuffer_End_Pos  = 0;
        }
    }
} 

 
// called every time a byte is received from Beacon Module.
void Beacon_onDataRx()
{
    while (Beacon_UART.readable()) 
    { // while there is data waiting
        Beacon_RX_Buffer[Beacon_RxBuffer_End_Pos++] = Beacon_UART.getc(); // put it in the buffer
        //DEBUG_UART.putc(LORA_UART_RX_Buffer[Beacon_RxBuffer_End_Pos-1]);
        if(Beacon_RxBuffer_End_Pos >= 100)
        {
            // BUFFER OVERFLOW. What goes here depends on how you want to cope with that situation.
            // For now just throw everything away.
            Beacon_RxBuffer_End_Pos  = 0;
        }
    }
}

 void BLE_Receiver_onDataRx(void)
{
    while (BLE_RECEIVER_UART.readable()) 
    { // while there is data waiting
        BLE_Receiver_UART_RX_Buffer[BLE_RxBuffer_End_Pos++] = BLE_RECEIVER_UART.getc(); // put it in the buffer
        //DEBUG_UART.putc(LORA_UART_RX_Buffer[Lora_RxBuffer_End_Pos-1]);
        if(BLE_RxBuffer_End_Pos >= BLE_RECEIVER_UART_RX_Size)
        {
            // BUFFER OVERFLOW. What goes here depends on how you want to cope with that situation.
            // For now just throw everything away.
            BLE_RxBuffer_End_Pos  = 0;
        }
    }
} 
 
 int main()
{
    DEBUG_UART.baud(115200);
    DEBUG_UART.printf("%s","Debugging started");
    LORA_UART.attach(&Lora_onDataRx, Serial::RxIrq);
    BLE_RECEIVER_UART.attach(&BLE_Receiver_onDataRx, Serial::RxIrq);
    
    //Create a thread to read vehicle data
    //Thread OBD_thread(OBD_Rcvd_Cmd_Processing_thread);

    Lora_Packet_Sending_Ticker.attach(&flip_Packet_Sending_Flag, 3.0); // call flip_Packet_Sending_Flag function every 5 seconds

    // OBD_PLUGIN_INTERRUPT_PIN.rise(&Enable_CheckIN_Packet_Sending);  // call toggle function on the rising edge
    //led2_thread is executing concurrently with main at this point
    CheckIn_Interrupt.rise(&Handle_CheckIn_Interrupt);
    inactivity.rise(interrupt_activity_inactivity); // Attach the address of interrupt_activity_inactivity function to rising edge
    Initialize_Beacon_Module();
    Lora_Periodic_Packet_Sending(); //Infinite loop for sending and receiving lora response, no return from here
} 

 //Function to be called when Interrupt is genearted for motion sensing, checkin
 void Initialize_Packets_Sent_Count(void)
 {
    Motion_Packet_Sent_Count = 0x00;
    CheckIN_Packet_Sent_Count = 0x00;
 } 
 
 uint8 Status_Packet_Wait_Count = 0;
void Lora_Periodic_Packet_Sending() 
{
    DEBUG_UART.printf("Periodic packet sending intiialized");
    Set_Up_Lora_Network_Configuration();
    Initialize_lora_Packets();   
    while (true) 
    {
        if(Packet_Type_To_Send == HEARTBEAT_TYPE_PACKET)    //check if packet to be sent is Heartbeat packet
        {
            if(Send_Lora_Packet_Flag)       //Check if packet sending is enabled, Packet should be sent only when enabled after timeout period
            {
                Status_Packet_Wait_Count++;
                if(Status_Packet_Wait_Count < 5)
                {
                    Send_RSSI_Request_Command(GET_RSSI);
                    Send_HeartBeat_Packet();                            //call function to send heartbeat packet
                    DEBUG_UART.printf("Sent HeartBeat Packet");
                    AT_Response_Receive_Status = FAILURE;
                    while(AT_Response_Receive_Status)
                        Get_Lora_Response();
                    Send_Lora_Packet_Flag = FALSE;
                    DEBUG_UART.printf("Heartbeat Packet Response Received");
                }
                else
                {
                    Status_Packet_Wait_Count = 0;
                    Send_Vehicle_Status_Packet();                            //call function to send heartbeat packet
                    DEBUG_UART.printf("Sent Status Packet");
                    AT_Response_Receive_Status = FAILURE;
                    while(AT_Response_Receive_Status)
                        Get_Lora_Response();
                    Send_Lora_Packet_Flag = FALSE;
                    DEBUG_UART.printf("Status Packet Response Received");
                }
            }
        }
        else if(Packet_Type_To_Send == MOTION_TYPE_PACKET)      //check if packet to be sent is motion packet
        {
            if(Send_Lora_Packet_Flag)                           //Check if packet sending isd enabled, Packet should be sent only when enabled after timeout period
            {
                Send_Motion_Packet();
                DEBUG_UART.printf("Sent Motion Packet");                               //call function to send periodic motion packet
                AT_Response_Receive_Status = FAILURE;
                while(AT_Response_Receive_Status)
                    Get_Lora_Response();
                DEBUG_UART.printf("Motion Packet Response Received");
                Send_Lora_Packet_Flag = FALSE;
                if(Motion_Packet_Sent_Count >= 5)               //Stop Sending Motion Packets if after sending for 2 minute
                {    
                    DEBUG_UART.printf("Packet Type Sending Changed to HeartBeat");
                    Motion_Packet_Sent_Count = 0;
                    Packet_Type_To_Send = HEARTBEAT_TYPE_PACKET;    //Set Packet type to send as heartbeat packet
                    Lora_Packet_Sending_Ticker.detach();          //destroy ticker                          
                    Lora_Packet_Sending_Ticker.attach(&flip_Packet_Sending_Flag, 10.0); //create new ticker
                    
                }
            }   
        }
        else if(Packet_Type_To_Send == CHECKIN_TYPE_PACKET)    //check if packet to be sent is Checkin packet
        {
            if(Send_Lora_Packet_Flag)       //Check if packet sending isd enabled, Packet should be sent only when enabled after timeout period
            {
                Send_CheckIN_Packet();                              //call function to send periodic checkIn packet
                DEBUG_UART.printf("Sent Checkin Packet");
                AT_Response_Receive_Status = FAILURE;
                while(AT_Response_Receive_Status)
                    Get_Lora_Response();
                Send_Lora_Packet_Flag = FALSE;
                DEBUG_UART.printf("Checkin Packet Response Received");
                if(CheckIN_Packet_Sent_Count >= 5)   //Stop Sending Motion Packets if after sending for 2 minute
                {
                    DEBUG_UART.printf("Packet Type Sending Changed to HeartBeat");
                    CheckIN_Packet_Sent_Count = 0;
                    Packet_Type_To_Send = HEARTBEAT_TYPE_PACKET;    //Set Packet type to send as heartbeat packet
                    Initialize_Packets_Sent_Count();
                }
            }
        } 
        if(OBD_PlugInOut_IOC_Status)    //Check if Accelerometer Interrupt is generated
        {
            //Enable_CheckIN_Packet_Sending();
            //Get_Acceleration_Type();
            OBD_PlugInOut_IOC_Status = FALSE;
            Checkin_Detect_Status ^= 0x01;
            Packet_Type_To_Send = CHECKIN_TYPE_PACKET;
            Send_Lora_Packet_Flag = TRUE;
            if(Checkin_Detect_Status)   //OBD Plugin detected
            {
                wait(1); //wait for 1sec to avoid detecting plugin debounce
                CheckIn_Interrupt.fall(&Handle_CheckIn_Interrupt);  //Change interrupt on change to falling type to detect plugout
                //write code to enable motion interrupt
            }
            else    //OBD Plugout detecetd
            {
                CheckIn_Interrupt.rise(&Handle_CheckIn_Interrupt);   //Change interrupt on change to rising type to detect plugin
                wait(1); //wait for 1sec to avoid detecting plugin debounce
                //write code to disable motion interrupt
            }
        }
        if(Motion_Detect_Status)    //Check if Accelerometer Interrupt is generated
        {
            Get_Acceleration_Type();
            Motion_Detect_Status = FALSE;
        }
    }   
}

void Get_Acceleration_Type(void)
{
    Packet_Type_To_Send = MOTION_TYPE_PACKET;       //whenever acceleration is detected change the packet type to be sent to motion type
    Lora_Packet_Sending_Ticker.detach();            //destroy ticker                                    
    Lora_Packet_Sending_Ticker.attach(&flip_Packet_Sending_Flag, 5.0); //create new ticker, time inetrval value to be changed
    Send_Lora_Packet_Flag = 1;                      //set flag to send motion packet as soon as motion is detecetd
    Motion_Lora_Packet.Acceleration_Type = Motion_Type_Detected;             //Read Type of motion deteceted
    //write code to read acceleration value for every 10sec after any of the acceleration is found
}
/*
//This function is used to enable checkin packet sending once OBD device is plugged in
void Enable_CheckIN_Packet_Sending() 
{
   // Enable_CheckIN_Packet_Sending = TRUE;  //set status to true
    if(Command_Received[0] == 0xFE) //check start of frame of packet received. every packet must start with 0xFE
    {
        if(Calculate_Lora_Frame_FCS((Command_Received + 1),(Command_Length + 1)) == (Command_Received[Command_Length + 2]))  //Check for packet inegrity by checking FCS
        {
            if((Command_Received[0] == SET_BEACON_CMD0) && (Command_Received[1] == SET_BEACON_CMD1))    //Check if command is received for setting beacon parameters
            {
                Process_Beacon_Command_Received((Command_Received + 2));
            }
        }
    }
} */

void Send_RSSI_Request_Command(uint8* Command_To_Send)
{
    BLE_RECEIVER_UART.printf(Command_To_Send);
}

void Get_Beacon_Receiver_Response(void)
{
    static uint16 Temp_Pos1;
    while(true)
    {
        if(BLE_Receiver_UART_RX_Buffer[Temp_Pos1] == 0x0D)
        {
            if(BLE_Receiver_UART_RX_Buffer[Temp_Pos1+1] == 0x0A)) 
            { //check for  AT end response <cr><lf> (i.e. 0x0D,0x0A)
                break;
            }
        }
        else
            Temp_Pos1++;
    }
}