nikita teggi
/
merged_code2_3rd_nov_2017
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Dependencies: SDFileSystem ds3231 eeprom_Nikita mbed testUniGraphic_150217
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merged_code2_20sept_2017_4th_oct_2017
by 
nikita teggi
bt.cpp
- Committer:
- nikitateggi
- Date:
- 2017-07-15
- Revision:
- 32:76892fdf5e4c
- Parent:
- 31:0f67acfc6236
- Child:
- 33:a80eed071fdc
File content as of revision 32:76892fdf5e4c:
#include "mbed.h"
#include "sdcard.h"
#include "struct.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 150
#include "eeprom_pgm.h"
//#define len 6000
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
uint8_t ack_rx; // varibale to receive ack from the bluetooth
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_read=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 int32_t bt_file_tosend=0; // file to send on bluetooth
static int32_t current_file=0; // file of the test done for the current pid
static uint32_t counter=0;
uint8_t file=0;
static uint32_t v1[no_of_samples];
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:
//blue.printf("\n");
state_tx =0;
counter=0;
total_file_read=0;
file_start=0;
j=0; count_send=0; total_samples=0;
file_pointer_position=0;
bt_file_tosend=eprom_read(6); // reading the file number(pid) from eeprom which has to be sent to bluetooth
current_file=eprom_read(1);
// current_file=2;
//bt_file_tosend=bt_file_tosend+1;
//eprom_write(6,bt_file_tosend); // read the current pid
mc.printf("eeprom file=%d",bt_file_tosend);
mc.printf("currentfile=%d",current_file);
if (bt_file_tosend>current_file) // if the file sent to bluetooth and current file are same,
{ // then there is no new file to send
state_rx =6;
}
else
{
file=sd_open_read(bt_file_tosend);
if(file==0)
{
state_rx =6;
}
else
{
sendinit();
total_file_size=file_size() ; // determined the file size
state_rx =1;
blue.printf("\n");
}
}
break;
case 2: total_samples=0;
sd_read1(bt_file1); // read the sd card file
myBleMsg->bt_msg=bt_file1; //copy the contents to the structure
send(); // send the initial string
blue.printf("\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_read=file_size1();
break;
case 3: counter=0;
if(count_send<(total_samples/no_of_samples))
{
sd_read(v1,no_of_samples);
counter=j+no_of_samples; //read 1500 samples
send_data_str1();
for(file_start=j;file_start<(j+no_of_samples);file_start++)
{
blue.printf("%08x", v1[file_start]);
}
check_sum=checksum((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(int 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=j;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((uint8_t *)v1,counter); // calculating checksum
send_data_str2(check_sum);
}
total_file_read=file_size1();
blue.printf("\n");
break;
case 4: total_file_read=file_size1();
if(total_file_read==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=6;
sendlast();
blue.printf("\n");
// sd_close();
}
else
{
state_rx=5;
total_file_read=file_size1();
}
}
return state_rx;
}
uint8_t bt_receive (uint8_t state_rx)
{
unsigned char state_tx =1; //state for transmitting
Timer t; // timer
uint8_t ack_rx; // varibale to receive ack from the bluetooth
//Point b; // structure copy
//myBleMsg=&b;
t.start(); // timer start
uint8_t sos_rx=0; // sos received from app
uint8_t eos_rx=0; // eos received from app
uint8_t chksum_rx=0; // check sum received from app
switch(state_rx)
{
case 1: // wait for the ack
state_rx=0;
myBleMsg->proto=ACK;
blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
if (ack_rx==myBleMsg->proto)
{
state_tx=2;
}
else
{
state_tx=1;
sd_close();
}
break;
case 2: state_rx =0; //wait for the ack
myBleMsg->proto=ACK;
blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
if (ack_rx==myBleMsg->proto)
{
state_tx=3;
file_pointer_position=total_file_read;
}
else
{
state_tx=2;
setpos1(file_pointer_position);
}
//blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
break;
case 3:
state_rx =0;
myBleMsg->proto=ACK;
blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
if (ack_rx==myBleMsg->proto)
{
state_tx=3;
count_send=count_send+1;
file_pointer_position=total_file_read;
}
else
{
state_tx=3;
file_start=file_start- no_of_samples;
setpos1(file_pointer_position);
}
break;
case 4:
state_rx =0;
myBleMsg->proto=ACK;
blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
if (ack_rx==myBleMsg->proto)
{
state_tx=4;
count_send=count_send+1;
file_pointer_position=total_file_read;
}
else
{
state_tx=3;
file_start=file_start- no_of_samples;
setpos1(file_pointer_position);
}
break;
case 5: state_tx=2;
break;
case 6: state_rx =0;
bt_file_tosend=bt_file_tosend+1;
eprom_write(6,bt_file_tosend);
mc.printf("next file");
/*myBleMsg->proto=ACK;
blue.scanf("%02x%02x%08x%02x",&sos_rx,&ack_rx,&eos_rx,&chksum_rx);
if (ack_rx==myBleMsg->proto)
{*/
if (bt_file_tosend<=current_file)
{ sd_close();
// bt_file_tosend=bt_file_tosend+1;
// eprom_write(6,bt_file_tosend);
// sd_open_read(bt_file_tosend);
// total_file_size=file_size() ;
state_tx=1;
mc.printf("next file");
}
else
{
state_tx=0;
mc.printf("out");
}
// }
/* else
{
state_tx=4;
} */
break;
}
return state_tx;
}
void send() // function to send the structure to bluetooth
{
myBleMsg->start_of_string=sos;
myBleMsg->length_file=26;
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 sendinit() // 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;
// myBleMsg->bt_msg=NULL;
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 sendlast() // 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;
// myBleMsg->bt_msg=NULL;
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(uint32_t *v1) // this function to calculate the checksum for the raw data
{
uint32_t sum=0;
uint8_t chksum_datatrfr=0;
for (int i=0;i< no_of_samples;i++)
{
sum=sum+v1[i];
}
sum=sos+eos+sum+counter+data_trfr;
chksum_datatrfr=sum & 0x000000FF;
return chksum_datatrfr;
}
uint8_t checksum_struct() // calculating checksum for sending the file structure
{
uint32_t sum=0;
uint8_t chksum_struct=0;
sum=myBleMsg->start_of_string+myBleMsg->proto+myBleMsg->bt_msg.length+myBleMsg->bt_msg.device_id+myBleMsg->bt_msg.date_time.date+myBleMsg->bt_msg.date_time.month+myBleMsg->bt_msg.date_time.year+myBleMsg->bt_msg.date_time.hour+myBleMsg->bt_msg.date_time.mins+myBleMsg->bt_msg.date_time.sec+myBleMsg->bt_msg.test_type+myBleMsg->bt_msg.sampling_freq+myBleMsg->bt_msg.num_samples.num_sample_ppg_dummy+myBleMsg->bt_msg.num_samples.num_sample_ecg_OTtyp+myBleMsg->bt_msg.cal_data.cal_sbp_dummy+myBleMsg->bt_msg.cal_data.cal_dbp_OTtyp+myBleMsg->end_of_string+myBleMsg->chk_sum;
chksum_struct=sum & 0x000000FF;
return chksum_struct;
}*/
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(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;
uint8_t i = 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;
}