store 16bit variable to 8bit FILE_Writebuffer

Phatline · December 12, 2017, 3:52pm

hi

save my patches with FILE_WriteBuffer like this:

// 16Bit Pitchbend-value to 2x8Bit value - to get a saveable format PB8[0] = \* ((unsigned char \*)&PB[track]);//low byte PB8[1] = \* ((unsigned char \*)((&PB[track])+1)); //hi byte //Fill CC-Array of Clip CC\_SD[0] = clip\_is\_virgin; CC\_SD[1] = Rythm; CC\_SD[2] = Loop\_Length[track]; CC\_SD[3] = BPM; CC\_SD[4] = SetDecayTime[track]; //Note-Data of Clip sprintf(filepathS, "sq/%d-%d.sq", track, clip);//First Pattern --- will be later copied 511 times! sq/8-512.pb FILE\_WriteOpen (filepathS,1); FILE\_WriteBuffer((u8 \*)file\_typeBank,4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD,32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)PB8,512); //2x8Bit Pitchbendvalue x 256 Steps = 512 Blocks FILE\_WriteBuffer((u8 \*)Sequence[track],2048); //Track, 256Steps, 8NotePolyphony 1x256x8 = 2048 Blocks FILE\_WriteClose ();

i want to save the Pitchband also, i but this is 16bit, and that cant be Written, i need 8Bit Values, so my my 16Bit Pitchband-Variable is named PB[track]

it is done by:

// 16Bit Pitchbend-value to 2x8Bit value - to get a saveable format PB8[0] = \* ((unsigned char \*)&PB[track]);//low byte PB8[1] = \* ((unsigned char \*)((&PB[track])+1)); //hi byte

so far ok, QUESTION is: how to combine low and hi byte back to the 16bit Variable PB[track]? (after FILE_ReadBuffer is done)

next question is how to split a multiy-array in low and hi bytes variables: for example PB[track][256] — which is the Pitchbend-Information - over 256 Steps in a Sequence.

thx 4 helpß

Antichambre · December 12, 2017, 6:57pm

Hi Phatline,

I don’t remember, sorry, just try.

memcpy(PB[track], &PB8, sizeof(PB8));

memcpy is copying a given length of data from an address to an other address
PB is already a Pointer then this code may work.
Tell me back I want to be sure.

You can try to write your 256 16bit values directly.

#define STEP\_NUM 256 u16 PB[STEP\_NUM]; //populate PB //... //write PB for(i=0; i\<STEP\_NUM ; i++)FILE\_WriteHWord(PB[i]);

4 hours ago, Phatline said:

next question is how to split a multiy-array in low and hi bytes variables: for example PB[track][256] — which is the Pitchbend-Information - over 256 Steps in a Sequence.

By using structures union?

//Definitions #define TRACK\_NUM 16 #define STEP\_NUM 256 //Type typedef union { struct { u16 data; }; struct { u8 datas[2]; }; struct { u8 data\_l; u8 data\_h; }; } data\_t; ..... //Vaiable data\_t PB[TRACK\_NUM][STEP\_NUM]; ..... //Using PB[track][step].data = (u16)pitchbend; //or PB[track][step].datas[0] = (u8)(pitchbend & 0xff); PB[track][step].datas[1] = (u8)(pitchbend \>\> 8); //or PB[track][step].data\_l = (u8)(pitchbend & 0xff); PB[track][step].data\_h = (u8)(pitchbend \>\> 8);

Best

Phatline · December 12, 2017, 11:53pm

4 hours ago, Antichambre said:

You can try to write your 256 16bit values directly.

#define STEP_NUM 256 u16 PB[STEP_NUM]; //populate PB //… //write PB for(i=0; i<STEP_NUM ; i++)FILE_WriteHWord(PB[i]);

hm having troubles by Reading the HWORD - compiler error:

make (im Verzeichnis: /home/...) rm -f project.hex Creating object file for app.c app.c: In function 'SD': app.c:857:40: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ------------------------------------------------------------------------------- Application successfully built for:....

app.c:857:40 isthis line:

 for(i=0; i\<256; i++){FILE\_ReadHWord ((u16 \*)PB[track][i]);} //read Pitchbend u16 values directly ??

u16* and u16

by using this code

//STORE if((job == 2) && (track == 8)) {//Store all Data- whole Program-Change-Patterns MUTEX\_SDCARD\_TAKE; for (track=0; track\<8; track++){ //count thru all tracks //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS, 1); FILE\_WriteBuffer((u8 \*)file\_typeBank, 4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD, 32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)Sequence[track], 2048); //8Tracks, 256Steps, 8NotePolyphony for(i=0; i\<256; i++){FILE\_WriteHWord(PB[track][i]);} //write Pitchbend u16 values directly //FILE\_WriteBuffer((u8 \*)PB8, 1024); //2x8Bit Pitchbendvalue...2 x 512 Steps= 1024 Blocks FILE\_WriteClose (); } MUTEX\_SDCARD\_GIVE; } //LOAD if((job == 1) && (track == 8)) {//Load all Data- whole Program-Change-Patterns MUTEX\_SDCARD\_TAKE; for (track=0; track\<8; track++){ //NOTE-Data of Clip sprintf(filepathL, "sq/%d-%d.sq", track, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_typeBank, 4); FILE\_ReadBuffer((u8 \*)CC\_SD, 32); // ALL OTHER VARIABLES are saved in this ARRAY (CC\_SD[128]) FILE\_ReadBuffer((u8 \*)Sequence[track], 2048); ////8Tracks, 256Steps, 8NotePolyphony u16 i = 0; for(i=0; i\<256; i++){FILE\_ReadHWord ((u16 \*)PB[track][i]);} //write Pitchbend u16 values directly FILE\_ReadClose (&midifile\_fi); } MUTEX\_SDCARD\_GIVE; } }

Phatline · December 13, 2017, 2:11am

this line stops my lcd from reacting and nothing will be written:

 for(i=0; i\<256; i++){ //16bit pitchbend to 2x8bit -saveable with Writebuffer PB8[0][i] = PB[track][i] & 0xff; PB8[1][i] = PB[track][i] \>\> 8;}

when used in:

 for (track=0; track\<8; track++){ //count thru all tracks for(i=0; i\<256; i++){ //16bit pitchbend to 2x8bit -saveable with Writebuffer PB8[0][i] = PB[track][i] & 0xff; PB8[1][i] = PB[track][i] \>\> 8;} MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, SongNrStor\*4); FILE\_WriteOpen (filepathS, 1); FILE\_WriteBuffer((u8 \*)file\_typeBank, 4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD, 32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)Sequence[track], 2048); //u8 Sequence[8][256][8] FILE\_WriteBuffer((u8 \*)PB8, 512); //2x256 FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE; //SD-Card is now free 4 apbess }

, if i delete this lines: all files are written/loadet fine,

maybe the bitshift takes to long… or sd access is to slow… or code is just waste…

Antichambre · December 13, 2017, 6:34am

5 hours ago, Phatline said:

for(i=0; i<256; i++){FILE_ReadHWord ((u16 *)PB[track]);} //read Pitchbend u16 values directly ??

How do you init PB as aray of int or pointer?
If array of int:

for(i=0; i\<256; i++)FILE\_WriteHWord (PB[track][i]); //write Pitchbend u16 values directly for(i=0; i\<256; i++)FILE\_ReadHWord (&PB[track][i]); //read Pitchbend u16 values directly

Phatline · December 13, 2017, 3:09pm

7 hours ago, Antichambre said:

How do you init PB as aray of int or pointer?
If array of int:

for(i=0; i<256; i++)FILE_WriteHWord (PB[track][i]); //write Pitchbend u16 values directly for(i=0; i<256; i++)FILE_ReadHWord (&PB[track][i]); //read Pitchbend u16 values directly

u16 PB[8][256] = {{}};

dont working, LCD hangs… by just sending a … SD(0,0,2 or 1) … i decoppelt already the Load/Store button to directly act on the SD-Function (with counters in milliseconds) which solved issues but not the pitchbend thing…

static void SD(u8 track, u16 clip, u16 job){ //STORE if(job == 2) { MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS,1); FILE\_WriteBuffer((u8 \*)file\_typeBank,4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD,32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)Sequence[track],2048); //u8 Sequence[8][256][8]={{{}}}; / for(i=0; i\<256; i++)FILE\_WriteHWord (PB[track][i]); //write Pitchbend u16 values directly FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE;//SD-Card is now free SD\_Done\_StoreFlag = 1;} //LOAD if(job == 1) { MUTEX\_SDCARD\_TAKE; //READ FILE sprintf(filepathL, "sq/%d-%d.sq", track, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_typeBank,4); FILE\_ReadBuffer((u8 \*)CC\_SD,32); FILE\_ReadBuffer((u8 \*)Sequence[track],2048); //u8 Sequence[8][256][8] for(i=0; i\<256; i++)FILE\_ReadHWord (&PB[track][i]); //read Pitchbend u16 values directly FILE\_ReadClose (&midifile\_fi); MUTEX\_SDCARD\_GIVE; SD\_Done\_Load\_Flag = 1;}

Antichambre · December 13, 2017, 4:57pm

What is the calling procedure? can you send me (PM) the project? I need a bigger view.
I think structure can resolve write and read but I need to know how it is called.
I’m not at home, nothing to do in the night in my hotel room, I can write something even if I haven’t got any hardware to test it…

Best

Phatline · December 13, 2017, 5:21pm

On 13.12.2017 at 5:57 PM, Antichambre said:

What is the calling procedure? can you send me (PM) the project? I need a bigger view.
I think structure can resolve write and read but I need to know how it is called.
I’m not at home, nothing to do in the night in my hotel room, I can write something even if I haven’t got any hardware to test it…

Best

file is up to date in wiki: http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=phatline:seq-melody-footboard.zip

when cleaned up this are the Functions involved >

1.APP_DIN_NotifyToggle >>> set a Flag to 1 (Hi)

2.TASK_Blink_Decay >>> wait 250ms, then send a Call to: SD(SaveNextFlag, SongNrStor, 2) = TRACK0, Song-PC0, store command

3.SD(u8 track, u16 clip, u16 job) >>> writing, reading, or initalizing files…

// local prototype of the task function static void TASK\_Blink\_Decay(void \*pvParameters); static void SD(u8 track, u16 clip, u16 job); void APP\_DIN\_NotifyToggle(u32 pin, u32 pin\_value){ //1.STORE-LOAD-BUTTON-ACTION if(pin\_value == 0) { switch(pin) { case 6: StoreFlag = 1; break; case 14: LoadFlag = 1; break; }}} static void SD(u8 track, u16 clip, u16 job){ //3.Job1=load all, Job2=store all, Job3=initalize card //STORE if(job == 2) { //Fill CC-Array of Clip CC\_SD[0] = clip\_is\_virgin; CC\_SD[1] = Rythm; CC\_SD[2] = Loop\_Length[track]; CC\_SD[3] = BPM; CC\_SD[4] = SetDecayTime[track]; MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS, 1); FILE\_WriteBuffer((u8 \*)file\_typeBank, 4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD, 32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)Sequence[track], 2048); //u8 Sequence[8][256][8]={{{}}}; //8Tracks, 256Steps, 8NotePolyphony for(i=0; i\<256; i++)FILE\_WriteHWord (PB[track][i]); //write Pitchbend u16 values directly FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE; //SD-Card is now free 4 apbess SongNrLoad = SongNrStor; //transfair load nr 2 store nr. SD\_Done\_StoreFlag = 1;} //LOAD if(job == 1) {//Load all Data- whole Program-Change-Patterns MUTEX\_SDCARD\_TAKE; //NOTE-Data of Clip sprintf(filepathL, "sq/%d-%d.sq", track, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_typeBank, 4); FILE\_ReadBuffer((u8 \*)CC\_SD, 32); FILE\_ReadBuffer((u8 \*)Sequence[track], 2048); //u8 Sequence[8][256][8] for(i=0; i\<256; i++)FILE\_ReadHWord (&PB[track][i]); //read Pitchbend u16 values directly FILE\_ReadClose (&midifile\_fi); MUTEX\_SDCARD\_GIVE; //Paste Variables from Array clip\_is\_virgin = CC\_SD[0]; Rythm = CC\_SD[1]; Loop\_Length[track] = CC\_SD[2]; BPM = CC\_SD[3]; SetDecayTime[track] = CC\_SD[4]; //SEQ\_BPM\_Set(BPM); NeedSync = 1; //update ClockCounter when ready... SongNrStor = SongNrLoad; //transfair load nr 2 store nr. SD\_Done\_Load\_Flag = 1;} //SD-Card Initalize - Files if((job == 3) && (clip \< 8)){//CHECK SD-Card/Initalize Card .... .... }//End While }//End TICK 0 \>\>\> 1ms Task...

Phatline · December 13, 2017, 5:39pm

how ever the endgoal is:

128 Program-Change/Songs a 4clips = 512clips

8tracks a 512 clips

fileformat: [track]-[clip].sq >>> each clip is a single file which can be called

when i Programchange, it loads the first row of clips >>> clip = PC*4 >>>

to load a other clip i need to built a 8x8 blm first: the plan is:

----------------tr0 tr1 tr2 tr3 tr4 tr5 tr6 tr7

last PC x - Play-Clip from last Song

empty grid x x x x x x x x - Indicate that there is no Song to choose

clip.row0 x x x - Play Clips[tr0][cliprow0] of actual song…

clip.row1 x -

clip.row2 x

clip.row3

empty grid x x x x x x x x

next PC x - Play Clips from next song…

so its a bit of ableton like… but more song structured.

Antichambre · December 13, 2017, 9:30pm

Try:

// write FILE\_WriteBuffer((u8 \*)PB[track], sizeof(PB[track]); // read FILE\_ReadBuffer((u8 \*)PB[track], sizeof(PB[track]);

I did it and your project was compiled without error…

Antichambre · December 13, 2017, 10:32pm

//write u8 PB8[STEP\_NUM\*2]; for (i=0; i\<STEP\_NUM; i++){ PB8[i\*2] = (u8)(PB[track][i] & 0xff); PB8[i\*2+1] = (u8)(PB[track][i] \>\> 8); } FILE\_WriteBuffer((u8 \*)PB8 , sizeof(PB8)); //read u8 PB8[STEP\_NUM\*2]; FILE\_ReadBuffer((u8 \*)PB8 , sizeof(PB8)); for (i=0; i\<STEP\_NUM; i++){ PB[track][i] = (u16)((PB8[i\*2+1] \<\< 8) + PB8[i\*2]); }

much less beautiful

Phatline · December 14, 2017, 1:33pm

15 hours ago, Antichambre said:

Try:

// write FILE_WriteBuffer((u8 *)PB[track], sizeof(PB[track]); // read FILE_ReadBuffer((u8 *)PB[track], sizeof(PB[track]);

I did it and your project was compiled without error…

should it does it the same? incl(track) (step) cant wait to try it at home.many thx.4that. mike.

14 hours ago, Antichambre said:

//write u8 PB8[STEP_NUM*2]; for (i=0; i<STEP_NUM; i++){ PB8[i*2] = (u8)(PB[track][i] & 0xff); PB8[i*2+1] = (u8)(PB[track][i] >> 8); } FILE_WriteBuffer((u8 *)PB8 , sizeof(PB8)); //read u8 PB8[STEP_NUM*2]; FILE_ReadBuffer((u8 *)PB8 , sizeof(PB8)); for (i=0; i<STEP_NUM; i++){ PB[track][i] = (u16)((PB8[i*2+1] << 8) + PB8[i*2]); }

much less beautiful

Antichambre · December 14, 2017, 6:33pm

4 hours ago, Phatline said:

should it does it the same? incl(track) (step)

Yes it’s exactly the same result for both.
The first uses your PB 16bits array directly, is elegant if it works.
Have a look on (root)/trunk/apps/processing/midibox_cv_v2/src/mbcv_file_b.cpp, you will find this line:

status |= FILE\_ReadBuffer((u8 \*)patch\_buffer, 2\*CV\_PATCH\_SIZE);

where patch_buffer is declared as an array of u16, you can see that the length is multiplied by two(sizeof will do it for you);
…
The second uses temporary and local u8 array PB8 (512 bytes size), must be slower and is ugly
For this last you have to define STEP_NUM:

#define STEP\_NUM 256

or replace it by 256

Phatline · December 17, 2017, 7:44am

thx has worked:

FILE_ReadBuffer((u8 *)Sequence[track], sizeof(Sequence[track])); //u8 Sequence[8][512][8]

FILE_WriteBuffer((u8 *)Sequence[track], sizeof(Sequence[track])); //u8 Sequence[8][512][8]

call: SD(track, clip, job);

for example: SD(6,1,2); //track 6 dont matter, ProgramChange 1, Load all Clips

SD(0,7,1);//track 0, ProgramChange 7, Load single Clip (clip 7-0.sq)

SD(0,1,3);//track 0 , ProgramChange 1, Store single Clip (clip 1-0.sq)

SD(2,1,4);//track 2 dont matter, ProgramChange 1, Store all Clips

SD(2,1,5);//track 2 dont matter, ProgramChange 1 dont matter, Copy track 0-0.sq 512x8 times on SD-Card = Make filestructure = initalize SD-Card > take 20 Minutes

full code: http://wiki.midibox.org/lib/exe/fetch.php?media=phatline:seq-melody-footboard.zip

relativly stripped down the SD-Management is done by:

 u8 clip\_is\_virgin = 1; u16 BPM = 120; u8 Rythm = 4; u8 SetDecayTime[8] = {60,60,60,60, 60,60,60,60}; us u8 Loop\_Length[8] = {1,4,1,4, 1,4,1,4}; u8 CC\_SD[8][32] = {}; //Save all other Variables into this Array - for SD-Card... u8 CC\_MSQ[8][512] = {}; u8 Sequence[8][512][8]={{{}}}; xSemaphoreHandle xSDCardSemaphore;// take and give access to SD-Card xSemaphoreHandle xLCDSemaphore;// take and give access to LCD static file\_t midifile\_fi; //used to read files from SD-Card #define MUTEX\_LCD\_TAKE { while( xSemaphoreTakeRecursive(xLCDSemaphore, (portTickType)0) != pdTRUE ); }//a Mutex reserve LCD/SD for a task, until it is given away... #define MUTEX\_LCD\_GIVE { xSemaphoreGiveRecursive(xLCDSemaphore); } #define PRIORITY\_SD ( tskIDLE\_PRIORITY + 3 ) //3:Mios standart static void SD(u8 track, u16 clip, u16 job); void APP\_Init(void){ xLCDSemaphore = xSemaphoreCreateRecursiveMutex(); // create Mutex for LCD access xSDCardSemaphore = xSemaphoreCreateRecursiveMutex();//create Mutex for SD-Card access FILE\_Init(0);// initialize file functions } void APP\_Tick(void){ //@1mS rate SDCardCount++;//CHECK SD-Car every 2sec. if(SDCardCount \> 2000) { SDCardCount = 0; SD(0, 0, 5); } //2s Counter \> send Check-SDCard-Commant to StoreLoad-Function (u8 track, u16 clip, u16 job) }

// S T O R A G E - SD - C A R D /// read write clips/programchanges static void SD(u8 track, u16 clip, u16 job){//Job1=load all, Job2=store all, Job3=initalize card u8 t = 0; //track counter initation switch(job) { // R E A D /////////////////////////////////////////////////////////////////////////////////////////////////////// case 1: //LOAD single Clip MUTEX\_SDCARD\_TAKE; sprintf(filepathL, "sq/%d-%d.sq", track, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_typeBank,4); FILE\_ReadBuffer((u8 \*)CC\_SD [track],sizeof(CC\_SD [track])); FILE\_ReadBuffer((u8 \*)CC\_MSQ [track],sizeof(CC\_MSQ [track])); //Control-Change-Motion-Sequence FILE\_ReadBuffer((u8 \*)Sequence[track],sizeof(Sequence [track])); //u8 Sequence[8][512][8] FILE\_ReadBuffer((u8 \*)PB [track],sizeof(PB [track])); FILE\_ReadClose (&midifile\_fi); MUTEX\_SDCARD\_GIVE; //Paste Variables from Array Rythm= CC\_SD[track][1]; Loop\_Length[track]= CC\_SD[track][2]; BPM = CC\_SD[track][4]; SetDecayTime[track] = CC\_SD[track][5]; //Calculate new Loop Lengths Loop[track]= Loop\_Length[track] \* MainLoop; //SEQ\_BPM\_Set(BPM); NeedSync = 1; //update ClockCounter when ready... SongNrStor = SongNrLoad; //transfair load nr 2 store nr. break; case 2: //LOAD all Clips - FOR P R O G R A M C H A N G E for( t=0; t\<8; t++) { MUTEX\_SDCARD\_TAKE; sprintf(filepathL, "sq/%d-%d.sq", t, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_typeBank,4); FILE\_ReadBuffer((u8 \*)CC\_SD [t],sizeof( CC\_SD [t])); FILE\_ReadBuffer((u8 \*)CC\_MSQ [t],sizeof( CC\_MSQ[t])); //Control-Change-Motion-Sequence FILE\_ReadBuffer((u8 \*)Sequence[t],sizeof(Sequence[t])); //u8 Sequence[8][512][8] FILE\_ReadBuffer((u8 \*)PB [t],sizeof( PB[t])); FILE\_ReadClose (&midifile\_fi); MUTEX\_SDCARD\_GIVE; //Paste Variables from Array Rythm= CC\_SD[t][1]; Loop\_Length[t]= CC\_SD[t][2]; BPM = CC\_SD[t][4]; SetDecayTime[t]= CC\_SD[t][5]; //Calculate new Loop Lengths Loop[t]= Loop\_Length[t] \* MainLoop; } //SEQ\_BPM\_Set(BPM); NeedSync = 1; //update ClockCounter when ready... SongNrStor = SongNrLoad; //transfair load nr 2 store nr. MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "PROGRAM LOAD - Finished"); MUTEX\_LCD\_GIVE; Update\_LCD\_s = 1; //normal LCD-Labeling in back again in a second break; // S T O R E ///////////////////////////////////////////////////////////////////////////////////////////////////// case 3: //S T O R E Single Clip //Fill CC-Array of Clip CC\_SD[track][0] = clip\_is\_virgin; CC\_SD[track][1] = Rythm; CC\_SD[track][2] = Loop\_Length[track]; CC\_SD[track][4] = BPM; CC\_SD[track][5] = SetDecayTime[track]; MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS,1); FILE\_WriteBuffer((u8 \*)file\_typeBank,4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD [track],sizeof(CC\_SD [track])); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)CC\_MSQ [track],sizeof(CC\_MSQ [track])); //Control-Change-Motion-Sequence FILE\_WriteBuffer((u8 \*)Sequence[track],sizeof(Sequence[track])); //u8 Sequence[8][512][8] FILE\_WriteBuffer((u8 \*)PB [track],sizeof(PB [track])); FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE;//SD-Card is now free 4 access Update\_LCD\_s = 1; //normal LCD-Labeling in back again in secunds SongNrLoad = SongNrStor; //transfair load nr 2 store nr. break; case 4: //S T O R E all Clips - FOR P R O G R A M C H A N G E for( t=0; t\<8; t++){ // store file once by once //Fill CC-Array of Clip CC\_SD[t][0] = clip\_is\_virgin; CC\_SD[t][1] = Rythm; CC\_SD[t][2] = Loop\_Length[t]; CC\_SD[t][4] = BPM; CC\_SD[t][5] = SetDecayTime[t]; MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", t, clip); FILE\_WriteOpen (filepathS,1); FILE\_WriteBuffer((u8 \*)file\_typeBank,4);//"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD [t],sizeof(CC\_SD [t]));//Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)CC\_MSQ [t],sizeof(CC\_MSQ [t]));//Control-Change-Motion-Sequence FILE\_WriteBuffer((u8 \*)Sequence[t],sizeof(Sequence[t])); //u8 Sequence[8][512][8] FILE\_WriteBuffer((u8 \*)PB [t],sizeof(PB [t])); FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE;//SD-Card is now free 4 access } SongNrLoad = SongNrStor; //transfair load nr 2 store nr. MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "PROGRAM STORE - Finished"); MUTEX\_LCD\_GIVE; Update\_LCD\_s = 1; //normal LCD-Labeling in back again in secunds break; // I N I T - S D - CARD //////////////////////////////////////////////////////////////////////////////////7////// case 5: //SD-Card Initalize MUTEX\_SDCARD\_TAKE;//SD-Card is now only for the following LINES reserved: statusSD = FILE\_CheckSDCard(); switch(statusSD) { case 2: MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "NO SD-Card"); MUTEX\_LCD\_GIVE;break; case 3: if(!FILE\_SDCardAvailable() ) {MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "Insert-FAT-Formated-SD-Card"); MUTEX\_LCD\_GIVE; break;} if(!FILE\_VolumeAvailable() ) {MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "Format SD-Format to FAT first!"); MUTEX\_LCD\_GIVE; break;} break; case 1: // YES CARD! \>\>\> next: check Card-content statusDir = FILE\_DirExists("sq");//ask file.c: exist a folder "t/" on the CARD? if(statusDir == 1){MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "good SD-file structure");MenueUpdateFlag = 0;MUTEX\_LCD\_GIVE; break;} if(statusDir == 0){MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(2); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "create 4096 Files on SDC it takes 20min - really!-wait!!! ");MUTEX\_LCD\_GIVE; //Fill CC-Array of Clip CC\_SD[track][0] = clip\_is\_virgin; CC\_SD[track][1] = Rythm; CC\_SD[track][2] = Loop\_Length[track]; CC\_SD[track][4] = BPM; CC\_SD[track][5] = SetDecayTime[track]; FILE\_MakeDir("sq"); //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS,1); FILE\_WriteBuffer((u8 \*)file\_typeBank,4); //"SQ01" = 4 Positons FILE\_WriteBuffer((u8 \*)CC\_SD[track],32); //Track Variables like Looplenght FILE\_WriteBuffer((u8 \*)CC\_MSQ[track],sizeof(CC\_MSQ[track]));//Control-Change-Motion-Sequence FILE\_WriteBuffer((u8 \*)Sequence[track],sizeof(Sequence[track])); //u8 Sequence[8][512][8] FILE\_WriteBuffer((u8 \*)PB[track],sizeof(PB[track])); FILE\_WriteClose (); //copy-prototype file to 512x8 clip files on SD-Card for(t=0; t\<8; t++){ s16 clipcount = 0; //declare and set the Bank Counter inital value to 0 for(clipcount=0; clipcount\<512; clipcount++){//countes 2 511 and do following commandos 511 times in a loop: char copyfilepath[16]; sprintf(copyfilepath, "sq/%d-%d.sq", t, clipcount); //make a new filename depending on the counter value 1.sq, 2.sq, 3.sq...511.sq FILE\_Copy ((char \*)"sq/0-0.sq", (char \*)copyfilepath);} //copy the File 0.tm to all other 511 files... } //SD-Card is now free 4 apbess MUTEX\_LCD\_TAKE; MIOS32\_LCD\_DeviceSet(0); MIOS32\_LCD\_Clear(); MIOS32\_LCD\_CursorSet(0, 0); MIOS32\_LCD\_PrintFormattedString ("%s", "SD-CARD - INIT - FINISHED"); MUTEX\_LCD\_GIVE;MenueUpdateFlag = 0;} break; } MUTEX\_SDCARD\_GIVE; } }

maybe that helps anyone, or me in the future…

Antichambre · December 17, 2017, 8:11am

Coooool

Now, to perfect your code, you can use structures to read/write your data directly and in one line.
Will show you how this evening…

Best
Bruno

Phatline · December 17, 2017, 2:11pm

to be prepared, today read a lot about structs, and memory-save/performance/code-readable much to optimize … it seems that there are things to keep on eye, to avoid heavy bus-load

…like order variable by byte size, and others which i cant summize a “i understand”…

importend for me is that the the program goes fast thru, i dont have memory problems, i think, since it is a sequencer timing is No1

by using struct it will slow down program-process? a normal variable-array is slower? > time not so importend - in case of loading from SD-Card to RAM, but for RAM-Access-time in the Program, hope that question make sense?

then there where people who said, that when i dont use 32bit types, the program have to calc my 1bit 8bit or 16bit into 32bit -memory-slots- and access time will go not so good, other saying that this is only for x86, arm a nother story… dont know: should i use “int” as standard (except for the big sequencer Arrys > memory to low i expirienced today more a 8 or 16bit…) or should i use u8 or u16 instead? i mean when i dont use structs for all those “not clip related”-variables, just single u8 variables make it any differnce at all?

-mike

Antichambre · December 17, 2017, 5:29pm

It’s a complicated question, I’m not a “C expert” too ;)… the only thing I know is that, in your case with a struct you can directly write from/read to without intermediate register, then program is faster… The best thing is to try and maybe measure it.

Hawkeye · December 18, 2017, 3:30pm

Hi Phatline,

i don’t know if i got all questions, but here are some generic answers

* Using structs to read in data, e.g. from SD card will speed up things massively, as every further read may block i/o.

* Memory alignment should only be a problem, if you access data all the time, tens of thousands of times per second :), if you only frequently need some data, don’t worry too much, these modern microcontrollers are orders of magnitude faster than old machines. Use the correct memory size for your data and you will be good.

* What you need to worry about is the data size of your program, so use the smallest possible data type in arrays.

In short, our core is very fast, but has only very limited ram. It can calculate like a boss, but can only store 3x more than your old C64

Have a good time!
Many greets,
Peter

Phatline · December 18, 2017, 7:11pm

2 hours ago, Hawkeye said:

* Using structs to read in data, e.g. from SD card will speed up things massively, as every further read may block i/o.

* Memory alignment should only be a problem, if you access data all the time, tens of thousands of times per second :), if you only frequently need some data, don’t worry too much, these modern microcontrollers are orders of magnitude faster than old machines. Use the correct memory size for your data and you will be good.

* What you need to worry about is the data size of your program, so use the smallest possible data type in arrays.

In short, our core is very fast, but has only very limited ram. It can calculate like a boss, but can only store 3x more than your old C64

thx good to know!

i will try them structs

code is for MelodienSpeicher, where arrays[8][512] polophonic played in 16th (Pitchbend, NoteOn/Off), and also hope that dont hurts when using structs

u16 PB[8][512] = {{}};// 8192: inital No Pitchbend! u8 Sequence[8][512][8]={{{}}};//8Tracks, 512Steps, 8NotePolyphony u8 CC\_MSQ[8][512] ={};//Motion-Sequence of one CC (Control-Wheel of Keyboard s16 TrackClipboard[512][8]= {{}}; //Copy actual Track into ClipboardBuffer u8 StepClipBoard[8][8] = {};//Just a memory container to copy paste Sequencer Steps

Phatline · December 19, 2017, 2:57am

i am stucking @ the moment, while i know how to use it instead of my normal arrays, i dont know how to write the whole struct into file…

ok here my struct: store_t loop[8] ,

how can i read/write them now into my FILE?

a struct is not named in MIOS32** functions doku**

app.h (so all functions have access on it

 typedef struct storage { // to optimize SD-Load-Time, each clips data is stored in this struct u16 PB [512];// Pitchband inital = 8192 = No Pitchbend! u8 SEQ[512] [8];// 512Steps, 8NotePolyphony //loop[c].SEQ bevore u8 MSQ[512];// Motion-loop[c].SEQ of one CC (Control-Wheel of Keyboard //loop[c].MSQ bevore u8 CC [32];// Save all other Variables into this Array - for SD-Card... //loop[c].CC bevore char leader;// Programchange able? - only 1 of 4 Song-Clips can send Programchanges via BLMatrix char virgin;// is there any data in the clip? need to display on a ButtonLed Matrix-Launcher //loop[c].virgin bevore u8 length;// 1x16, 2x16... //loop[c].length bevore u8 decay;// 60ms... could be set with Encoder, but I dont need a variable, since the melody out will be used by the Triggermatrix... //loop[c].decay bevore u8 rythm;// 4x4=16, 5x3=15 usw... to calculate maximal duration per UI-matrix page //loop[c].rythm bevore u16 bpm; } store\_t;

app.c , initalize data

//Card-Clip-Container store\_t loop[8]; void APP\_Init(void){ //initalize 8 Clips with standart values u8 a = 0; for ( a=0; a\>8; a++ ) { sprintf( loop[a].file\_type, "SIGL" ); loop[a].leader =0; loop[a].virgin =1; loop[a].length =1; loop[a].decay =60; loop[a].rythm =4; loop[a].bpm = 120; //initiate Pitchbend u16 b; for(b=0; b\<512; b++){ loop[a].PB[b] = 8192; }// 8192: inital No Pitchbend! };

app.c , store data

//S T O R E Single Clip MUTEX\_SDCARD\_TAKE; //Write to File sprintf(filepathS, "sq/%d-%d.sq", track, clip); FILE\_WriteOpen (filepathS,1); //write struct FILE\_WriteClose (); MUTEX\_SDCARD\_GIVE;//SD-Card is now free 4 access break; //L O A D single Clip MUTEX\_SDCARD\_TAKE; sprintf(filepathL, "sq/%d-%d.sq", track, clip); FILE\_ReadOpen (&midifile\_fi, filepathL); FILE\_ReadBuffer((u8 \*)file\_type,4); //write struct FILE\_ReadClose (&midifile\_fi); MUTEX\_SDCARD\_GIVE; //Calculate new Loop Lengths Loop[track]= loop[track].length \* MainLoop; break;