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Repo for COM_MNG_TMTC_SIMPLE for integration with adf
Fork of COM_MNG_TMTC_SIMPLE by
SDCread.h
- Committer:
- shekhar
- Date:
- 2015-12-31
- Revision:
- 9:9dbd59a6cc30
- Parent:
- 8:d1951bbdcdd8
File content as of revision 9:9dbd59a6cc30:
// It takes 276us to read from sd card and write in 112 buffer //new variable : reset_adf. //commented : spi.mutex , disk_read(), //~ #include"SDcard.h" #define T_frames 30 unsigned char buffer_112_counter,sent_tm = 0; int disk_read(uint8_t *, uint64_t),j; bool new_session = true; bool last_buffer = false; bool first_block = true; bool last_block =false; bool repeat_T_frame = false; unsigned int counter_in_block=0,diff_prev=0; unsigned char EOS_counter = 0; unsigned char enable_T_frame = false; uint64_t start_block_num ; // Read from TC uint64_t end_block_num ; // Read from TC uint64_t Number_of_blocks_to_read ; uint64_t block_counter = 0; unsigned char buffer_512[512], buffer_112[112],counter_in_S_frame=0,counter_in_SCH=0; unsigned char make_EOS_flag = true; bool reset = false; void differential_encode(unsigned char* ptr, int length){ for(int i=0; i<length;i++){ unsigned char s = ptr[i] , t; t = s ^ (s >> 1); (diff_prev == 0) ? t=t^0x00 : t=t^0x80 ; diff_prev = int(s & 0x01); ptr[i] = t; } } void send_tm_from_SD_card(){ if(make_EOS_flag == true){ make_EOS_flag = false; Number_of_blocks_to_read = end_block_num - start_block_num +1; } for(buffer_112_counter=0;buffer_112_counter<112;buffer_112_counter++){ if(new_session == true){ //check if it is beginnig of session buffer_112[buffer_112_counter]=S_frame[counter_in_S_frame++]; // sending S frame if(counter_in_S_frame==48){ // cout<<"new_session_over\n"; counter_in_S_frame=0; new_session = false; enable_T_frame = true; // enable_SCH = true; } } else if(enable_T_frame == true){ // To send t frames if(block_counter != Number_of_blocks_to_read){ if(first_block){ // Read first block // cout<<"brooooooo"<<start_block_num<<"yo"<<endl; // SPI_mutex.lock(); // disk_read(buffer_512,start_block_num ); // SPI_mutex.unlock(); counter_in_block = 0; block_counter++; first_block = false; // cout<<"first block exit\n"; // cout<<Number_of_blocks_to_read; //printf("\n"); // for(int j=0;j<512;j++){ // printf("%02X ",buffer_512[j]); // } // printf("\n"); // if(block_counter == Number_of_blocks_to_read){ // last_block = true; // } } if((counter_in_block == 318 )&&(sent_tm<38)){ // Read next block // cout<<"next block exit\n"; // SPI_mutex.lock(); // disk_read(buffer_512,start_block_num + block_counter ); // SPI_mutex.unlock(); counter_in_block = 0; block_counter++; if(block_counter == Number_of_blocks_to_read){ last_block = true; } } } if(!last_block){ // cout<<int(sent_tm)<<" "; if(sent_tm<38){ buffer_112[buffer_112_counter] = buffer_512[counter_in_block++]; // sending T frames // cout<<int (counter_in_block)<<" "; if(counter_in_block == 318){ sent_tm = sent_tm + 2; } } else if(sent_tm == (T_frames-1)){ buffer_112[buffer_112_counter] = buffer_512[(counter_in_block++ )-159]; if(counter_in_block == 318){ // cout<<"last block exit\n"; sent_tm = T_frames; } } else if(sent_tm == T_frames){ // Give eos and start new session buffer_112[buffer_112_counter]=EoS[EOS_counter++]; if(EOS_counter == 120){ enable_T_frame = false; new_session = true; EOS_counter =0; sent_tm=0; repeat_T_frame = false; // cout<<"eos exit\n"; } } } if(last_block){ // cout<<"lb"; if(sent_tm == (T_frames-1) && (repeat_T_frame == false)){ buffer_112[buffer_112_counter] = buffer_512[(counter_in_block++ )-159]; if(counter_in_block == 318){ // cout<<"repeat block exit\n"; sent_tm = T_frames; } } if((sent_tm == T_frames) && (repeat_T_frame == false)){ // Give eos and start new session buffer_112[buffer_112_counter]=EoS[EOS_counter++]; if(EOS_counter == 120){ // cout<<"eos exit"; enable_T_frame = false; new_session = true; EOS_counter =0; sent_tm=0; } } else if((sent_tm < (T_frames-1)) && (repeat_T_frame == false)){ buffer_112[buffer_112_counter] = buffer_512[counter_in_block++]; // sending last two T frames if(counter_in_block == 318){ sent_tm = sent_tm + 2; repeat_T_frame= true; } } else if((sent_tm< T_frames) && (repeat_T_frame == true)){ buffer_112[buffer_112_counter] = buffer_512[(counter_in_block++ )-159]; if(counter_in_block == 477){ sent_tm = sent_tm +1; counter_in_block = counter_in_block-159; } } else if((sent_tm == T_frames ) && (repeat_T_frame == true)){ // Give eos and start new session buffer_112[buffer_112_counter]=EoS[EOS_counter++]; if(EOS_counter == 120){ enable_T_frame = false; new_session = true; EOS_counter =0; // printf("yoooo %d",int(sent_tm)); sent_tm=0; last_block = false; last_buffer = true; // printf("?\r\n"); break; } } } } } differential_encode(buffer_112, 112); if(last_buffer ==true){ diff_prev=0; } }