rohit gupta
/
merged_code2_3rd_nov_2017
Important changes to repositories hosted on mbed.com
Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.
To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.
It is also possible to export all your personal repositories from the account settings page.
Dependencies: SDFileSystem ds3231 eeprom_Nikita mbed testUniGraphic_150217
Fork of
merged_code2_3rd_nov_2017
by 
nikita teggi
bt.cpp
- Committer:
- nikitateggi
- Date:
- 2017-09-15
- Revision:
- 48:f90edb35a20e
- Parent:
- 47:3716dd41dba6
- Child:
- 52:7d9ff7781bdc
File content as of revision 48:f90edb35a20e:
#include "mbed.h"
#include "sdcard.h"
#include "struct.h"
#include "eeprom_pgm.h"
#include "main.h"
#define ACK 0x00 /// changed //16/06 #define all the values removing structure
#define START_OF_FILE 0x01
#define END_OF_FILE 0x02
#define DATA_TRFR 0x03
#define NACK 0xFF
#define SOS 0xc0
#define EOS 0xc0
#define NO_OF_SAMPLES 600 //changed the buffer size from 150- 22/7/17- suhasini
#define CHKSUM 0x80
#define STRUCTURE_LENGTH 26
BLEMsg_info *bt_file;
Point *myBleMsg;
Serial mc(USBTX,USBRX); // serial terminal
Serial blue(PTC4,PTC3); // communicating bluetooth through serial
static uint32_t total_samples=0; // variable to hold total number of samples
Point b; // structure copy
BLEMsg_info bt_file1; // structure copy
static uint32_t total_file_size=0; // to determine the size of the file
static uint32_t total_file_size_sent=0;
static uint32_t file_start=0; // variable for 'for loop'
//static uint32_t j=0;
uint8_t count_send=0;
static uint32_t file_pointer_position=0;
static uint32_t counter=0;
static uint32_t v1[NO_OF_SAMPLES];
uint8_t file=0;
uint8_t bt_send(uint8_t state_tx)
{
blue.baud(115200); // baud rate of bluetooth
bt_file=&bt_file1;
myBleMsg=&b;
int8_t check_sum=0;
uint8_t state_rx =0;
switch(state_tx)
{
case 1:
state_tx =0;
counter=0;
total_file_size_sent=0;
file_start=0;
count_send=0; total_samples=0;
file_pointer_position=0;
mc.printf("bt_pid = %d\n",get_btpid());
if(get_filepid()>get_btpid()) //check for pid and bluetooth pid by reading from file
{
send_initial_string();
blue.printf("\n");
file=sd_open_read(get_btpid()); // open the file for reading
total_file_size=file_size(); // determined the file size
state_rx = 1;
}
else
{
state_rx =0; //no files to send
mc.printf("no file to send\n");
}
break;
case 2: total_samples=0;
//file=sd_open_read(get_btpid());
// total_file_size=file_size() ; // determined the file size
sd_read1(bt_file1); // read the sd card file
mc.printf("sd file opened to read data in it\n");
myBleMsg->bt_msg=bt_file1; //copy the contents to the structure
send_structure(); // send the structure string
blue.printf("\n");
mc.printf("sent initial string\n");
total_samples= myBleMsg->bt_msg.num_samples.num_sample_ppg_dummy+myBleMsg->bt_msg.num_samples.num_sample_ecg_OTtyp;
state_tx =0;
state_rx =2;
count_send=0;
total_file_size_sent=file_size1();
break;
case 3:
counter=0;
if(count_send<(total_samples/NO_OF_SAMPLES))
{
sd_read(v1,NO_OF_SAMPLES);
counter=NO_OF_SAMPLES; //read 1500 samples
send_data_str1();
for(file_start=0;file_start<(NO_OF_SAMPLES);file_start++)
{
blue.printf("%08x", v1[file_start]);
}
check_sum=checksum_rawdata((uint8_t *)v1,counter); // calculating checksum // calculating checksum
state_tx =0;
state_rx =3;
send_data_str2(check_sum); // send the remaining part of the string
}
else
{
for(uint16_t l=0;l<NO_OF_SAMPLES;l++)
{
v1[l]=NULL;
}
counter=(total_samples-( NO_OF_SAMPLES*count_send));
send_data_str1();
sd_read(v1,(total_samples-( NO_OF_SAMPLES*count_send)));
for(file_start=0;file_start<(total_samples-( NO_OF_SAMPLES*count_send));file_start++)
{
blue.printf("%08x", v1[file_start]);
}
state_tx=0;
state_rx=4;
check_sum=checksum_rawdata((uint8_t *)v1,counter); // calculating checksum
send_data_str2(check_sum);
}
total_file_size_sent=file_size1();
blue.printf("\n");
break;
case 4: // total_file_size_sent=file_size1();
if(total_file_size_sent==total_file_size) // if the total file size is same as total file size
{ // then there is no more data to send in that particular file
state_rx=5;
send_last_string();
blue.printf("\n");
}
else
{
total_samples=0;
sd_read1(bt_file1); // read the sd card file
// mc.printf("sd file opened to read data in it\n");
myBleMsg->bt_msg=bt_file1; //copy the contents to the structure
send_structure(); // send the initial string
blue.printf("\n");
// mc.printf("sent initial string\n");
total_samples= myBleMsg->bt_msg.num_samples.num_sample_ppg_dummy+myBleMsg->bt_msg.num_samples.num_sample_ecg_OTtyp;
state_tx =0;
state_rx =2;
count_send=0;
total_file_size_sent=file_size1();
}
}
return state_rx;
}
uint8_t bt_receive (uint8_t state_rx)
{
unsigned char state_tx =1; //state for transmitting
uint8_t ack_rx=0; // varibale to receive ack from the bluetooth
uint8_t sos_rx=0; // sos received from app
uint8_t eos_rx=0; // eos received from app
uint32_t length_rx=0;
uint8_t chksum_rx=0;
while (blue.readable()) // reading from bluetooth app
{
blue.scanf("%02x", &sos_rx);
blue.scanf("%02x", &ack_rx);
blue.scanf("%08x", &length_rx);
blue.scanf("%02x", &eos_rx);
blue.scanf("%02x", &chksum_rx);
break;
}
// mc.printf("%02x%02x%08x%02x%02x", sos_rx,ack_rx,length_rx,eos_rx,chksum_rx);
switch(state_rx)
{
case 1: // wait for the ack
state_rx=0;
myBleMsg->proto=ACK;
if ((ack_rx == ACK) && (chksum_rx == CHKSUM)) // check for ack and checksum
{
state_tx=2;
}
else
{
state_tx=1;
sd_close();
}
break;
case 2: state_rx =0; //wait for the ack
if ((ack_rx == ACK) && (chksum_rx == CHKSUM))
{
state_tx=3;
file_pointer_position=total_file_size_sent;
}
else
{
state_tx=2;
setpos1(file_pointer_position);
//sd_close(); //file closed which was opened earlier because it opens again in bt_send case 1
}
//blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
break;
case 3:
state_rx =0;
if ((ack_rx == ACK) && (chksum_rx == CHKSUM))
{
state_tx=3;
count_send=count_send+1;
file_pointer_position=total_file_size_sent;
}
else
{
state_tx=3;
file_start=file_start- NO_OF_SAMPLES;
setpos1(file_pointer_position);
}
break;
case 4:
state_rx =0;
if ((ack_rx == ACK) && (chksum_rx == CHKSUM))
{
state_tx=4;
count_send=count_send+1;
file_pointer_position=total_file_size_sent;
}
else
{
state_tx=3;
file_start=file_start- NO_OF_SAMPLES;
setpos1(file_pointer_position);
}
break;
case 5: state_rx = 0;
if ((ack_rx == ACK) && (chksum_rx == CHKSUM))
{
sd_close();
increment_btpid(); // increment the bluetooth pid and write in the file
mc.printf("next file");
mc.printf("bt_pid = %d\n",get_btpid());
state_tx=1;
}
else
{
state_tx = 4;
}
break;
}
return state_tx;
}
void send_structure() // function to send the structure to bluetooth
{
myBleMsg->start_of_string=SOS;
myBleMsg->length_file = STRUCTURE_LENGTH;
myBleMsg->proto=DATA_TRFR; // data transfer mode
blue.printf("%02x",myBleMsg->start_of_string);
blue.printf("%02x",myBleMsg->proto);
blue.printf("%08x",myBleMsg->length_file); //changed the sequence
blue.printf("%08x",myBleMsg->bt_msg.length);
blue.printf("%02x",myBleMsg->bt_msg.device_id);
blue.printf("%08x",myBleMsg->bt_msg.patient_id);
blue.printf("%02x",myBleMsg->bt_msg.date_time.date);
blue.printf("%02x",myBleMsg->bt_msg.date_time.month);
blue.printf("%02x",myBleMsg->bt_msg.date_time.year);
blue.printf("%02x",myBleMsg->bt_msg.date_time.hour);
blue.printf("%02x",myBleMsg->bt_msg.date_time.mins);
blue.printf("%02x",myBleMsg->bt_msg.date_time.sec);
blue.printf("%02x",myBleMsg->bt_msg.test_type);
blue.printf("%04x",myBleMsg->bt_msg.sampling_freq);
blue.printf("%04x",myBleMsg->bt_msg.num_samples. num_sample_ppg_dummy);
blue.printf("%04x",myBleMsg->bt_msg.num_samples.num_sample_ecg_OTtyp);
blue.printf("%04x",myBleMsg->bt_msg.cal_data.cal_sbp_dummy);
blue.printf("%04x",myBleMsg->bt_msg.cal_data.cal_dbp_OTtyp);
myBleMsg->end_of_string=EOS;
myBleMsg->chk_sum = checksum_struct((uint8_t *)myBleMsg, sizeof(Point));
blue.printf("%02x",myBleMsg->end_of_string);
blue.printf("%02x",myBleMsg->chk_sum);
}
void send_initial_string() // function to send the initial string at the start f communication to bluetooth
{
uint8_t sum_init=0 ;
myBleMsg->start_of_string=SOS;
myBleMsg->length_file=0;
myBleMsg->proto=START_OF_FILE;
sum_init=checksum_init();
myBleMsg->chk_sum=sum_init;
blue.printf("%02x",myBleMsg->start_of_string);
blue.printf("%02x",myBleMsg->proto);
blue.printf("%08x",myBleMsg->length_file); // chnged
myBleMsg->end_of_string=EOS;
blue.printf("%02x",myBleMsg->end_of_string);
blue.printf("%02x",myBleMsg->chk_sum);
}
uint8_t checksum_init() // function to calculate the checksum for the initial string
{
uint32_t sum = 0;
uint8_t chksum_init = 0;
sum=SOS+EOS+START_OF_FILE;
chksum_init = sum & 0x000000FF;
return chksum_init;
}
uint8_t checksum_last() // function to calculate the checksum for the last string
{
uint32_t sum = 0;
uint8_t chksum_last = 0;
sum=SOS+EOS+END_OF_FILE; // changed //16/06 #define all the values removing structure
chksum_last=sum & 0x000000FF;
return chksum_last;
}
void send_last_string() // function to send the last string to the bluetooth // which determines the end of file
{
uint8_t sum_last=0;
myBleMsg->start_of_string = SOS;
myBleMsg->length_file = 0;
myBleMsg->proto=END_OF_FILE;
sum_last=checksum_last();
myBleMsg->chk_sum=sum_last;
blue.printf("%02x",myBleMsg->start_of_string);
blue.printf("%02x",myBleMsg->proto);
blue.printf("%08x",myBleMsg->length_file); // chnged
myBleMsg->end_of_string=EOS;
blue.printf("%02x",myBleMsg->end_of_string);
blue.printf("%02x",myBleMsg->chk_sum);
}
void send_data_str1() // function to send a part of the structure // after this raw data is sent//
{
myBleMsg->start_of_string=SOS;
myBleMsg->length_file=(counter*4);
myBleMsg->proto=DATA_TRFR;
blue.printf("%02x",myBleMsg->start_of_string);
blue.printf("%02x",myBleMsg->proto); // chnaged
blue.printf("%08x",myBleMsg->length_file);
}
void send_data_str2(uint8_t check_sum) // after raw data// this last part of structure is sent
{
myBleMsg->chk_sum=check_sum;
myBleMsg->end_of_string=EOS;
blue.printf("%02x",myBleMsg->end_of_string);
blue.printf("%02x",myBleMsg->chk_sum);
}
uint8_t checksum_struct(const uint8_t data[], uint16_t numBytes) // calculating checksum for
{
uint32_t chksum_struct = 0;
uint16_t index = 0;
for (index=0U; index < (numBytes-1); index++)
{
chksum_struct += data[index];
//blue.printf("data=%02x\n",data[index]);
}
// blue.printf("%08x\n",chksum_struct);
return chksum_struct;
}
uint8_t checksum_rawdata(const uint8_t data[], uint32_t numBytes) // this function to calculate the checksum for the raw data
{
uint32_t sum=0;
uint8_t chksum_datatrfr=0;
uint32_t index = 0;
uint32_t index1 = 0;
sum += SOS;
sum += DATA_TRFR;
index1=(numBytes*4);
sum +=(index1>>(8*0))&0xFF;
sum +=(index1>>(8*1))&0xFF;
for (index=0U; index<(numBytes*4); index++)
{
sum += data[index];
}
sum+=EOS;
chksum_datatrfr = sum & 0x000000FF;
//mc.printf("chksum_datatrfr=%02x\n",chksum_datatrfr);
return chksum_datatrfr;
}