File content as of revision 8:f28ad4600b0f:

/*

Copyright (c) 2012-2014 RedBearLab

Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
and associated documentation files (the "Software"), to deal in the Software without restriction, 
including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

/*
 *    The application works with the BLEController iOS/Android App.
 *    Type something from the Terminal to send
 *    to the BLEController App or vice verse.
 *    Characteristics received from App will print on Terminal.
 */
 
#include "mbed.h"
#include "ble/BLE.h"
#include <myData.h>
//#include "LocalFileSystem.h"

#define BLE_UUID_TXRX_SERVICE            0x0000 /**< The UUID of the Nordic UART Service. */
#define BLE_UUID_TX_CHARACTERISTIC       0x0002 /**< The UUID of the TX Characteristic. */
#define BLE_UUIDS_RX_CHARACTERISTIC      0x0003 /**< The UUID of the RX Characteristic. */

#define TXRX_BUF_LEN                     20

BLE  ble;

Serial pc(USBTX, USBRX);

// The Nordic UART Service
static const uint8_t uart_base_uuid[] = {0x71, 0x3D, 0, 0, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t uart_tx_uuid[]   = {0x71, 0x3D, 0, 3, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t uart_rx_uuid[]   = {0x71, 0x3D, 0, 2, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
static const uint8_t uart_base_uuid_rev[] = {0x1E, 0x94, 0x8D, 0xF1, 0x48, 0x31, 0x94, 0xBA, 0x75, 0x4C, 0x3E, 0x50, 0, 0, 0x3D, 0x71};

static const int8_t txPower = 0xCD;

uint8_t txPayload[TXRX_BUF_LEN] = {0,};
uint8_t rxPayload[TXRX_BUF_LEN] = {0,};

static uint8_t rx_buf[TXRX_BUF_LEN];
static uint8_t rx_len=0;

static uint32_t gTimeInstant = 5; // 1 second

//LocalFileSystem local("local");

static myData_t g_MyData[MAXBUFFER];

uint16_t g_MyDataIdx=0;

//uint8_t infoCollector[TXRX_BUF_LEN][10];

DigitalOut led(LED1);
PwmOut buzzer(p15);

AnalogIn VP3(A3);
AnalogIn VP4(A4);
AnalogIn VP5(A5);

Timeout timeout_err; // timeout for buzz on error
Ticker periodicActions, eachInstant; 

mtime_manager_t g_myTimeVar;
mdate_manager_t g_myDateVar;

InterruptIn event(p7);

GattCharacteristic  txCharacteristic (uart_tx_uuid, txPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
                                      
GattCharacteristic  rxCharacteristic (uart_rx_uuid, rxPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
                                      
GattCharacteristic *uartChars[] = {&txCharacteristic, &rxCharacteristic};

GattService         uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));


//extern bool isInputValid(uint8_t * buffer);

bool isInputValid(uint8_t * buffer){
    bool retValue=  false;
    
    switch (buffer[0]){
        case 'i':
            switch (buffer[1]){
                case '3':
                case '4':
                case '5':
                    retValue = true;
                    break;
                default:
                    retValue = false;    
            }
            break;
        case 'l':
            retValue = true;
            break;
        case 's':
            if (((buffer[1]>'9')||(buffer[1]<'0'))||((buffer[2]>'9')||(buffer[2]<'0')))
                retValue = false;
            else 
                retValue = true;
            break;    
        case 't': //timestamp 
            retValue = true;
            break;
        case 'd': //date
            retValue= true;
            break;    
        default:
            // error        
            retValue = false;
    }
    return retValue;
}


void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
{
    pc.printf("Disconnected \r\n");
    pc.printf("Restart advertising \r\n");
    ble.startAdvertising();
}

void buzz_int(uint8_t period, uint8_t duty_cycle){
    if (period!=0) {        
        buzzer = (9.0 - (float)duty_cycle)/9.0;
        buzzer.period((float)period);
    } else {
        buzzer = 0;
    }
}

float readInput_f(uint8_t channelID){
    float retVal=0.0;
    switch (channelID){
        case 3:
            retVal = VP3.read();
            break;
        case 4:
            retVal = VP4.read();
            break;
        case 5:
            retVal = VP5.read();
            break;    
    }
    return ((retVal*3.3));
}

void at_timeout_err(){
    // stop buzz
    buzz_int(0,0);
}


void at_eachInstant(){
    //static uint32_t counter = 0;
    // update time
    if (g_myTimeVar.updateTime ==false){
        g_myTimeVar.newTime.sec = (g_myTimeVar.currentTime.sec + gTimeInstant)% 60; 
        g_myTimeVar.newTime.min = (g_myTimeVar.currentTime.min + ((gTimeInstant + g_myTimeVar.currentTime.sec) / 60))%60;
        if (g_myTimeVar.newTime.min< g_myTimeVar.currentTime.min ) { 
            g_myTimeVar.currentTime.hour++;
        }
        g_myTimeVar.newTime.hour = (g_myTimeVar.currentTime.hour + (gTimeInstant / 3600+g_myTimeVar.newTime.min/60))%24;
        if (g_myTimeVar.newTime.hour < g_myTimeVar.currentTime.hour){
            g_myDateVar.newDate.day = (g_myDateVar.currentDate.day + 1)%(eNrDaysPerMonth[g_myDateVar.currentDate.month]+1);
            if (g_myDateVar.newDate.day < g_myDateVar.currentDate.day ){
                g_myDateVar.newDate.month = (g_myDateVar.currentDate.month+ 1)%13+1;
                if (g_myDateVar.newDate.month< g_myDateVar.currentDate.month){
                    g_myDateVar.newDate.year = (g_myDateVar.currentDate.year+ 1);
                }
            }
           memcpy(&g_myDateVar.currentDate,&g_myDateVar.newDate, sizeof(date_t));
        }
        memcpy(&g_myTimeVar.currentTime,&g_myTimeVar.newTime, sizeof(mtime_t));    
    } else {
        memcpy(&g_myTimeVar.currentTime,&g_myTimeVar.newTime, sizeof(mtime_t));    
        g_myTimeVar.updateTime =false;
    }
    if (g_myDateVar.updateDate ==true){  // there is a new Date ?
        memcpy(&g_myDateVar.currentDate,&g_myDateVar.newDate, sizeof(date_t));
        g_myDateVar.updateDate =true;
    }    
    
    // save some data
    memcpy(&g_MyData[g_MyDataIdx].date,&g_myDateVar.currentDate, sizeof(date_t));
    memcpy(&g_MyData[g_MyDataIdx].time,&g_myTimeVar.currentTime, sizeof(mtime_t));
    g_MyData[g_MyDataIdx].light = readInput_f(3);
    g_MyData[g_MyDataIdx].gndV = readInput_f(5);
    g_MyData[g_MyDataIdx].temp = readInput_f(4);
    g_MyData[g_MyDataIdx].led_on = led;
    
    /*
    int i=0;
    char buf[45];
    if (g_MyDataIdx==MAXBUFFER-1){
        // write2File
        FILE *fp = fopen("out.txt","a+");
        for (i=0;i<MAXBUFFER;i++){
            sprintf(buf,"20%2d-%2d-%2d %2d:%2d:%2d %4.3f %4.3f %4.3f %2d \r\n",g_MyData[i].date.year,
            g_MyData[i].date.month,g_MyData[i].date.day, g_MyData[i].time.hour, g_MyData[i].time.min, 
            g_MyData[i].time.sec, g_MyData[i].light, g_MyData[i].gndV, g_MyData[i].temp, g_MyData[i].led_on);
            fwrite(buf,sizeof(uint8_t),strlen(buf),fp);
        }
        fclose(fp);
        
    }*/
    g_MyDataIdx = (g_MyDataIdx+1)%MAXBUFFER;
}
/*
void at_periodicActions(){
    char myBuf[TXRX_BUF_LEN]; 
    int index=0, length;
    float value[3];
       
    value[0] = readInput_f(3);
    value[1] = readInput_f(4);    
    sprintf(myBuf,">I3:%4.3f;I4:%4.3f",value[0],value[1]);
    length =18;
    memcpy(&infoCollector[0][index],&myBuf,length);    
    ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), &infoCollector[0][index], length); 
    wait(0.3);
    
    index ++;
    value[2] = readInput_f(5);
    sprintf(myBuf,">I5:%4.3f;",value[2]);    
    length= 10;
    memcpy(&infoCollector[0][index],&myBuf,length);
    ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), &infoCollector[0][index], length); 
    wait(0.3);
    index ++;
    length = 9;
    if (led==0){
        sprintf(myBuf,"%s",">LED: ON");
        memcpy(&infoCollector[0][index],&myBuf,length);
    }
    else {
        sprintf(myBuf,"%s",">LED:OFF");
        memcpy(&infoCollector[0][index],&myBuf,length);
    }
    ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), &infoCollector[0][index], length); 
    wait(0.3);
}
*/
int decode(uint8_t * buffer, uint16_t* length){

    int retVal = 0;
    char myBuf[TXRX_BUF_LEN+1];    
    float value;
    
    buffer[0]=buffer[3];
    buffer[1]=' ';
    buffer[2]=':';
        switch (buffer[3]){
            case 'i': // Analog Input Read Request                
                    buffer[1]=buffer[4];                
                    if (isInputValid(&buffer[3])){
                        value = readInput_f((buffer[4]-'0'));                    
                        sprintf(myBuf,"%f",value);
                        memcpy(&buffer[3],&myBuf,7);   // e.g. 3.12345         
                        *length= 7+3;
                        }
                    else {                    
                        retVal= -1;                   
                    }
                break;   
            case 'l': // toogle led
                led = ! led;
                if (led==0){
                    sprintf(myBuf,"%s","ON");
                    memcpy(&buffer[3],&myBuf,2);
                }
                else {
                    sprintf(myBuf,"%s","OFF");
                    memcpy(&buffer[3],&myBuf,3);
                }
                *length = 3 + 3;
                break;
            case 's': // buzzer
                buffer[1]=buffer[4];                
                if (isInputValid(&buffer[3])){
                    buzz_int((buffer[4]-'0'),(buffer[5]-'0'));
                    buffer[2]=buffer[5];
                    sprintf(myBuf,"%s:%f","S",buzzer.read());
                    memcpy(&buffer[3],&myBuf,7);                
                    *length= 7+3;                    
                    retVal= 1;
                    }
                else {                    
                    retVal= -1;                   
                }
                break;    
            case 't': // time operations
                buffer[1]=buffer[4];
                retVal=1;
                switch (buffer[1]){
                    case 'i':  // time insert
                        memcpy(myBuf,&buffer[5],2);
                        g_myTimeVar.newTime.hour=atoi(myBuf); // TODO check if it is a number
                        memcpy(myBuf,&buffer[7],2);
                        g_myTimeVar.newTime.min=atoi(myBuf); // TODO check if it is a number
                        memcpy(myBuf,&buffer[9],2);
                        g_myTimeVar.newTime.sec=atoi(myBuf); // TODO check if it is a number
                        g_myTimeVar.updateTime = true;
                        *length = 3+2;
                        break;
                    case 'g':  // time get
                        sprintf(myBuf,"H:%2d:%2d:%2d",g_myTimeVar.currentTime.hour,g_myTimeVar.currentTime.min,g_myTimeVar.currentTime.sec);
                        memcpy(&buffer[3],myBuf,11);
                        *length = 3+11;
                        break;
                    default:     
                        retVal = -1; //error
                }
                break;       
             case 'd': // date operations
                buffer[1]=buffer[4];
                retVal=1;
                switch (buffer[1]){
                    case 'i':  // date insert
                        memcpy(myBuf,&buffer[5],2);
                        g_myDateVar.newDate.year=atoi(myBuf); // TODO check if it is a number
                        memcpy(myBuf,&buffer[7],2);
                        g_myDateVar.newDate.month=atoi(myBuf); // TODO check if it is a number
                        memcpy(myBuf,&buffer[9],2);
                        g_myDateVar.newDate.day=atoi(myBuf); // TODO check if it is a number
                        g_myDateVar.updateDate = true;
                        *length = 3+2;
                        break;
                    case 'g':  // time get
                        sprintf(myBuf,"D:20%2d:%2d:%2d",g_myDateVar.currentDate.year,g_myDateVar.currentDate.month,g_myDateVar.currentDate.day);
                        memcpy(&buffer[3],myBuf,13);
                        *length = 3+13;
                        break;
                    default:     
                        retVal = -1; //error
                }
                break;          
            default:
                retVal = -1;
        }
        if (retVal == -1){
            sprintf(myBuf,"%s","Incorect");
            memcpy(&buffer[3],&myBuf,8);
            *length= 8+3;
            buzz_int(5,3);
            timeout_err.attach(&at_timeout_err, 2);    
        }
        return retVal;
}
void WrittenHandler(const GattWriteCallbackParams *Handler)
{   
    uint8_t buf[TXRX_BUF_LEN+1];    
    uint16_t bytesRead, index;
    
    if (Handler->handle == txCharacteristic.getValueAttribute().getHandle()) 
    {
        ble.readCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(), &buf[2], &bytesRead);
        memset(txPayload, 0, TXRX_BUF_LEN);
        memcpy(txPayload, &buf[2], TXRX_BUF_LEN);       
        if (buf[2] == 'x'){
            decode(buf,&bytesRead);
        } else {
            //echo back
                buf[0]='R';
                buf[1]=':';                
                bytesRead+=2;
        }        
        ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), buf, bytesRead); 
        // print on PC monitor
        //pc.printf("WriteHandler \r\n");
        //pc.printf("Length: %d \r\n", bytesRead);
        pc.printf("R: ");
        for(index=0; index<bytesRead; index++)
        {
            pc.putc(txPayload[index]);        
        }
        pc.printf("\r\n");       
        
    }
}

void uartCB(void)
{   
    while(pc.readable())    
    {
        rx_buf[rx_len++] = pc.getc();    
        if(rx_len>=20 || rx_buf[rx_len-1]=='\0' || rx_buf[rx_len-1]=='\n')
        {            
            ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), rx_buf, rx_len);             
            //pc.printf("Rec: Length: %d \r\n",rx_len);                        
            rx_len = 2;
            rx_buf[0]='S';
            rx_buf[1]=':';
            break;
        }
    }
}

void button(){
    uint8_t buf[TXRX_BUF_LEN+1];
    buf[0]='B';
    buf[1]=':';
    buf[2]='O';
    buf[3]='N';
    ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), buf, 4); 
}

void g_varInit(){
    g_myTimeVar.currentTime = (mtime_t){0,0,0};
    g_myTimeVar.updateTime = false;
    g_myDateVar.currentDate =(date_t){3,10,16};
    g_myDateVar.updateDate = false;
}


int main(void)
{
    ble.init();
    ble.onDisconnection(disconnectionCallback);
    ble.onDataWritten(WrittenHandler);  
    event.rise(&button);
    periodicActions.attach(&at_eachInstant,gTimeInstant); // each second    
    pc.baud(19200);
    pc.printf("SimpleChat Init \r\n");
    g_varInit();
    
    pc.attach( uartCB , pc.RxIrq);
   // setup advertising 
    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                    (const uint8_t *)"MyBleVT", sizeof("MyBleVT") - 1);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                    (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid));
    //ble.accumulateAdvertisingPayload(GapAdvertisingData::TX_POWER_LEVEL,(const uint8_t *)txPower, sizeof(txPower)); 
    ble.setTxPower(txPower);                                                                       
    // 100ms; in multiples of 0.625ms. 
    ble.setAdvertisingInterval(160);

    ble.addService(uartService);
    
    ble.startAdvertising(); 
    pc.printf("Advertising Start \r\n");
    
    while(1)
    {
        ble.waitForEvent(); 
    }
}