Jump to content

maximum performance - strip down mios32


Phatline

Recommended Posts

hey,

i have a very time sensitive case, where i have to scan a GPIO (DIN) Pin (J5) for ON/OFF states (audio>schmitt-trigger>J5)

>>> Clock 2 Audio 2 Clock:

i switched off, what i found, and deleted as many tasks i know... > see code attachment (mios config and app.c)

what task is best for scaning such GPIO? or can i change priority with switch somehwere --- i have put it into "void APP_MIDI_Tick" up to now... when a new pulse comes in a midi-clock-send signal goes out also...

the Signal-Pulses on GPIO are 2ms -on-pulses -like shown in this picture

5b317f81213bb_6ms-latency---2mspulse.thu

the first and 3rd track are recordet @once where 1st track is audio track,and 3rd track is midi-clock-click, the 2nd track is the overdubbed audio-track driven by the clock of 3rd track --- i have 6ms delay... of course there is also some delay in sound generation and other ways.but there is also quite a bit delay in the c-code...

 

#include <mios32.h>

u8 clock_trigger = 0;
u8 clock_counter = 0;
u8 audio_pulse_durate = 0;
u8 Start_Flag = 1;
u8 Mode = 0; //0: Sense Midi Clock, 1: Sense Audio Pulses
u8 blink = 0;
u8 count = 0;
u32 count_off = 0;
u8 loose_clock = 0;
u8 count_flag = 0;
u8 Start_sense = 0;


void APP_Init(void){ // set GPIO 
// Set GPIO
  // J5A0 >> DIN  - Pull-DOWN - Audio Input > Sense    Pulses     from Schmitt Trigger
    MIOS32_BOARD_J5_PinInit(0, MIOS32_BOARD_PIN_MODE_INPUT_PD); // Push Down //connect to 5V

  // J5A1 >> DOUT - Push-Pull - Audio Out   > Generate Pulses     for Record
    MIOS32_BOARD_J5_PinInit(1, MIOS32_BOARD_PIN_MODE_OUTPUT_PP);
    MIOS32_BOARD_J5_PinSet (1, 0); // Turn off PIN > init
        
  // J5A2 >> DIN  > Pull-UP   - Record Button
    MIOS32_BOARD_J5_PinInit(2, MIOS32_BOARD_PIN_MODE_INPUT_PU); // Pull-UP //connect to ground

  // J5A3 >> DOUT > Push-Pull - LED
    MIOS32_BOARD_J5_PinInit(3, MIOS32_BOARD_PIN_MODE_OUTPUT_PP);
    MIOS32_BOARD_J5_PinSet (3, 1); // Turn ON PIN > init
}



void APP_Background(void){ // Switch + LED + MODE (play rec) set + Auto-Stop

// /*
    //Scan Mode-Switch //deep88 - Switch Version
    u8 temp = Mode;
    Mode = MIOS32_BOARD_J5_PinGet(2);
    if (temp != Mode) { Start_Flag = 1; audio_pulse_durate = 0;}
        
    //Mode-LED-States (to indicate Mode-Push-Button
    if (count <=  0 ) { blink = 0; }
    if (count >  12)  { blink = 1; }
    if (count >  24)  { blink = 0; count =0 ;}


    if      (Mode == 1) { MIOS32_BOARD_J5_PinSet(3, 1);}     //Turn OFF PIN   -   sensing audio pulses  dumpout midiclock
    else if (Mode == 0 && loose_clock == 1) { MIOS32_BOARD_J5_PinSet(3, 0); }     //Turn ON  PIN  - ready for sensing midiclock - ready for dumpout audio
    else if (Mode == 0 && loose_clock == 0) { MIOS32_BOARD_J5_PinSet(3, blink); } //Blink    PIN  -   sensing midiclock     dumpout audio


    if(Mode == 1) { // sensing pulse mode (send out Clock-Mode)
        // MidiClock Auto-Stop
        if (count_flag == 1) {
            count_off++;
            if(count_off > 200000) {
                count_flag = 0;
                loose_clock = 1;
                count_off = 0; //turn off blink light after loosing Midi-Connection
                 audio_pulse_durate = 0; // Pulse stop duration
                 Start_Flag = 1;
                MIOS32_MIDI_SendStop(32);     //send Stop-Sig - Port-A
                //MIOS32_MIDI_SendDebugMessage("auto-stop");  // DEBUG
            }}}
}   
    
    
    
void APP_Tick(void){ // Timer for Pulse-Output Duration
    if(  clock_trigger == 1 && clock_counter <= 1) {clock_counter++;}
    else{clock_trigger =  0;
         MIOS32_BOARD_J5_PinSet(1, 0);
        }}



void APP_MIDI_Tick(void){       // sensing Audio-Pulses & Dumpout Midiclockdata

    if(Mode == 1) { // Scan Mode-Switch
        
        // First time we get a Pulse, we send out a CLOCK-START-Signal
        if((MIOS32_BOARD_J5_PinGet(0) == 0) && (audio_pulse_durate == 0) && (Start_Flag == 1) ) { // Pulse = HI,  Pulse start duration
            MIOS32_MIDI_SendStart(32);     //send Start-Sig - Port-A

            Start_Flag = 0;
            //MIOS32_MIDI_SendDebugMessage("start");  // DEBUG
        }
        
        // All other Pulses, are just Clocks, without Startsignals 
        if((MIOS32_BOARD_J5_PinGet(0) == 0) && (audio_pulse_durate == 0) && (Start_Flag == 0) ) {//Pulse = HI,  Pulse start duration
            MIOS32_MIDI_SendClock(32);     //send MidiClock - Port-A
            audio_pulse_durate = 1; // Pulse starte duration
            //MIOS32_MIDI_SendDebugMessage("clock-durate-pulse");  // DEBUG
        }
        // Ensure to kill the PULSE DURATION FLAG, after the Pulse is gone....
         if((MIOS32_BOARD_J5_PinGet(0) == 1) && (audio_pulse_durate == 1) ) { //Pulse = LO, Pulse still in duration
            audio_pulse_durate = 0; // Pulse stop duration
            
            count_off  = 0; // reset Midi-Stop-Signal counter >>> for Autostop
            count_flag = 1; // begin to count for Autostop
            //MIOS32_MIDI_SendDebugMessage("pulse-off");  // DEBUG
        }
    }
}



void APP_MIDI_NotifyPackage(mios32_midi_port_t port, mios32_midi_package_t midi_package){ //sense Midi Messages
    
        if(Mode == 0  &&  port==32) {

                // SEQ Stop Signal
                if(midi_package.evnt0 == 252) { Start_Flag = 1; loose_clock = 1; Start_sense = 0; } // when sequencer is stopped: generate midi clock & transport

                // SEQ Start Signal
                if(midi_package.evnt0 == 250  || midi_package.evnt0 == 251) { Start_sense = 1; }// start to react on midiclock

                // SEQ Clock          
                if(midi_package.evnt0 == 248  &&  Start_sense == 1) {//248CLK,250Strt,251Cont,252Stp
                clock_trigger = 1;
                clock_counter = 0; //initate Clock HI-State Timer
                MIOS32_BOARD_J5_PinSet(1, 1); //activate GPIO-Pin J5A Pin 2
                Start_Flag = 1; //reset flag in order to send out a start signal when next AUDIO-PULSE COMES IN
                loose_clock = 0;                
                count++;
                }
            }
    }

 

thx for perfomance help

project.zip

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...