I know this library is under construction, but my questions is there is a way or did

(SOLVED) MIDI IN / LED with multiplexer ? about control-surface HOT 7 CLOSED

tttapa commented on May 25, 2024

(SOLVED) MIDI IN / LED with multiplexer ?

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Comments (7)

tttapa commented on May 25, 2024 2

You can't use multiplexers for LEDs. (You would have to scan through all LEDs really quickly to create a POV, which uses a lot of resources.)
You can, however, use shift registers, which are much more suited for driving LEDs. You only need three digital outputs to drive many LEDs.

For example:

Control-Surface/examples/Ex.15.LED-Shift-Register/Ex.15.LED-Shift-Register.ino

Lines 1 to 72 in 485495d

 /* 

  This is an example of the "ShiftRegisterOut" class of the Control_Surface library. 

  Connect three daisy-chained shift registers to pins 11 (ST_CP), 12 (DS) and 10 (SH_CP). 

  Connect 8 RGB LEDs (+ current limiting resistors) to the outputs of the shift registers 

  (R-G-B-R-G-B-...). 

  If blue LEDs light up when red ones should, either flip all the LEDs, or change the  

  bit order in the ShiftRegisterOut constructor to 'MSBFIRST' instead fo 'LSBFIRST'. 

  10 >──────────────┬─────────────────────────────┬─────────────────────────────┐  

  ┎━━━━━━━━━━┷━━━━━━━━━━━┓ ┎━━━━━━━━━━┷━━━━━━━━━━━┓ ┎━━━━━━━━━━┷━━━━━━━━━━━┓ 

  ┃ SH_CP ┃ ┃ SH_CP ┃ ┃ SH_CP ┃ 

  12 >───┨ Data in Data out ┠──────┨ Data in Data out ┠──────┨ Data in Data out ┃ 

  ┃ ST_CP ┃ ┃ ST_CP ┃ ┃ ST_CP ┃ 

  ┗━━━━━━━━━━┯━━━━━━━━━━━┛ ┗━━━━━━━━━━┯━━━━━━━━━━━┛ ┗━━━━━━━━━━┯━━━━━━━━━━━┛ 

  11 >──────────────┴─────────────────────────────┴─────────────────────────────┘  

  The 8 LEDs represent 8 channels. A red LED indicates that the channel is muted,  

  a green LED indicates that solo is enabled, and a blue LED indicates that the  

  channel is armed for recording. 

  Map the Arduino as a Mackie Control Universal in your DAW or DJ software. 

  Written by Pieter P, 22-03-2018 

  https://github.com/tttapa/Control_Surface 

 */ 

 #include <Control_Surface.h> // Include the library 

 const pin_t dataPin = 12; //Pin connected to DS of 74HC595 

 const pin_t clockPin = 10; //Pin connected to SH_CP of 74HC595 

 const pin_t latchPin = 11; //Pin connected to ST_CP of 74HC595 

 // Create a new shift register output connected to pins 11, 13 and 10, shift the data out with the least significant bit first,  

 // There are 24 (= 3·8) outputs in total. 

 ShiftRegisterOut ShiftReg(dataPin, clockPin, latchPin, LSBFIRST, 24); 

 const uint8_t channel = 1; 

 MIDI_LED leds[] = { 

 {ShiftReg.red(0), MCU::MUTE_1, channel}, 

 {ShiftReg.red(1), MCU::MUTE_2, channel}, 

 {ShiftReg.red(2), MCU::MUTE_3, channel}, 

 {ShiftReg.red(3), MCU::MUTE_4, channel}, 

 {ShiftReg.red(4), MCU::MUTE_5, channel}, 

 {ShiftReg.red(5), MCU::MUTE_6, channel}, 

 {ShiftReg.red(6), MCU::MUTE_7, channel}, 

 {ShiftReg.red(7), MCU::MUTE_8, channel}, 

 {ShiftReg.green(0), MCU::SOLO_1, channel}, 

 {ShiftReg.green(1), MCU::SOLO_2, channel}, 

 {ShiftReg.green(2), MCU::SOLO_3, channel}, 

 {ShiftReg.green(3), MCU::SOLO_4, channel}, 

 {ShiftReg.green(4), MCU::SOLO_5, channel}, 

 {ShiftReg.green(5), MCU::SOLO_6, channel}, 

 {ShiftReg.green(6), MCU::SOLO_7, channel}, 

 {ShiftReg.green(7), MCU::SOLO_8, channel}, 

 {ShiftReg.blue(0), MCU::REC_RDY_1, channel}, 

 {ShiftReg.blue(1), MCU::REC_RDY_2, channel}, 

 {ShiftReg.blue(2), MCU::REC_RDY_3, channel}, 

 {ShiftReg.blue(3), MCU::REC_RDY_4, channel}, 

 {ShiftReg.blue(4), MCU::REC_RDY_5, channel}, 

 {ShiftReg.blue(5), MCU::REC_RDY_6, channel}, 

 {ShiftReg.blue(6), MCU::REC_RDY_7, channel}, 

 {ShiftReg.blue(7), MCU::REC_RDY_8, channel}, 

 }; 

 void setup() {} // Nothing to set up 

 void loop() { 

 // Refresh the Control Surface (read MIDI input and update LEDs). 

 Control_Surface.refresh(); 

 }

from control-surface.

tttapa commented on May 25, 2024 2

Note that you don't have to use RGB LEDs, you can use ordinary LEDs as well, and you can use any number of shift registers.

For example, if you want a single shift register with 8 normal LEDs:

 ShiftRegisterOut ShiftReg(dataPin, clockPin, latchPin, LSBFIRST, 8); 
  
 MIDI_LED leds[] = { 
   {ShiftReg.pin(0), MCU::MUTE_1, channel}, 
   {ShiftReg.pin(1), MCU::MUTE_2, channel}, 
   {ShiftReg.pin(2), MCU::MUTE_3, channel}, 
   {ShiftReg.pin(3), MCU::MUTE_4, channel}, 
   {ShiftReg.pin(4), MCU::MUTE_5, channel}, 
   {ShiftReg.pin(5), MCU::MUTE_6, channel}, 
   {ShiftReg.pin(6), MCU::MUTE_7, channel}, 
   {ShiftReg.pin(7), MCU::MUTE_8, channel},  
 };

from control-surface.

tttapa commented on May 25, 2024 1

You can use AnalogMultiplex for buttons as well.
Or you can use a button matrix.

from control-surface.

brian12112 commented on May 25, 2024

Wow, Its a great news. I waiting for this. Thank you tttapa.

from control-surface.

brian12112 commented on May 25, 2024

Wow, I am consider to using it with Standalone LEDs. Thank You again tttapa. It helps me a lot!

from control-surface.

brian12112 commented on May 25, 2024

Just one last questions. There is a solution to using multiplexer or shift register for the buttons? Thanks B4!

from control-surface.

brian12112 commented on May 25, 2024

Thanks. I'll give it a try.

from control-surface.

(SOLVED) MIDI IN / LED with multiplexer ? about control-surface HOT 7 CLOSED

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	/*
	This is an example of the "ShiftRegisterOut" class of the Control_Surface library.

	Connect three daisy-chained shift registers to pins 11 (ST_CP), 12 (DS) and 10 (SH_CP).
	Connect 8 RGB LEDs (+ current limiting resistors) to the outputs of the shift registers
	(R-G-B-R-G-B-...).
	If blue LEDs light up when red ones should, either flip all the LEDs, or change the
	bit order in the ShiftRegisterOut constructor to 'MSBFIRST' instead fo 'LSBFIRST'.

	10 >──────────────┬─────────────────────────────┬─────────────────────────────┐
	┎━━━━━━━━━━┷━━━━━━━━━━━┓ ┎━━━━━━━━━━┷━━━━━━━━━━━┓ ┎━━━━━━━━━━┷━━━━━━━━━━━┓
	┃ SH_CP ┃ ┃ SH_CP ┃ ┃ SH_CP ┃
	12 >───┨ Data in Data out ┠──────┨ Data in Data out ┠──────┨ Data in Data out ┃
	┃ ST_CP ┃ ┃ ST_CP ┃ ┃ ST_CP ┃
	┗━━━━━━━━━━┯━━━━━━━━━━━┛ ┗━━━━━━━━━━┯━━━━━━━━━━━┛ ┗━━━━━━━━━━┯━━━━━━━━━━━┛
	11 >──────────────┴─────────────────────────────┴─────────────────────────────┘

	The 8 LEDs represent 8 channels. A red LED indicates that the channel is muted,
	a green LED indicates that solo is enabled, and a blue LED indicates that the
	channel is armed for recording.

	Map the Arduino as a Mackie Control Universal in your DAW or DJ software.

	Written by Pieter P, 22-03-2018
	https://github.com/tttapa/Control_Surface
	*/

	#include <Control_Surface.h> // Include the library

	const pin_t dataPin = 12; //Pin connected to DS of 74HC595
	const pin_t clockPin = 10; //Pin connected to SH_CP of 74HC595
	const pin_t latchPin = 11; //Pin connected to ST_CP of 74HC595

	// Create a new shift register output connected to pins 11, 13 and 10, shift the data out with the least significant bit first,
	// There are 24 (= 3·8) outputs in total.
	ShiftRegisterOut ShiftReg(dataPin, clockPin, latchPin, LSBFIRST, 24);

	const uint8_t channel = 1;

	MIDI_LED leds[] = {
	{ShiftReg.red(0), MCU::MUTE_1, channel},
	{ShiftReg.red(1), MCU::MUTE_2, channel},
	{ShiftReg.red(2), MCU::MUTE_3, channel},
	{ShiftReg.red(3), MCU::MUTE_4, channel},
	{ShiftReg.red(4), MCU::MUTE_5, channel},
	{ShiftReg.red(5), MCU::MUTE_6, channel},
	{ShiftReg.red(6), MCU::MUTE_7, channel},
	{ShiftReg.red(7), MCU::MUTE_8, channel},
	{ShiftReg.green(0), MCU::SOLO_1, channel},
	{ShiftReg.green(1), MCU::SOLO_2, channel},
	{ShiftReg.green(2), MCU::SOLO_3, channel},
	{ShiftReg.green(3), MCU::SOLO_4, channel},
	{ShiftReg.green(4), MCU::SOLO_5, channel},
	{ShiftReg.green(5), MCU::SOLO_6, channel},
	{ShiftReg.green(6), MCU::SOLO_7, channel},
	{ShiftReg.green(7), MCU::SOLO_8, channel},
	{ShiftReg.blue(0), MCU::REC_RDY_1, channel},
	{ShiftReg.blue(1), MCU::REC_RDY_2, channel},
	{ShiftReg.blue(2), MCU::REC_RDY_3, channel},
	{ShiftReg.blue(3), MCU::REC_RDY_4, channel},
	{ShiftReg.blue(4), MCU::REC_RDY_5, channel},
	{ShiftReg.blue(5), MCU::REC_RDY_6, channel},
	{ShiftReg.blue(6), MCU::REC_RDY_7, channel},
	{ShiftReg.blue(7), MCU::REC_RDY_8, channel},
	};

	void setup() {} // Nothing to set up

	void loop() {
	// Refresh the Control Surface (read MIDI input and update LEDs).
	Control_Surface.refresh();
	}