Where did the github hardware repo go?

Hardware Development
1

Hi,

I’m trying to find the schematic for the petal to look at an example of how it uses a PCA9685 to drive several RGB LEDs.

But, It seems that that repo doesn’t exist anymore? Or maybe it has been moved to somewhere else?

Does anyone know what’s going on?

2

The schematics are now available on the product page. But since the Petal is discontinued, I think we overlooked adding its schematic on the legacy page.

Let me check in with the team. Thank you for the wait.

3

Thank you for the wait. Here’s the Petal Rev5 schematic.
That link can be found on the Daisy Petal’s legacy page.

4

Thank you very much for the super quick reply!

1 Like
5

Hi, it might be me, but I can’t seem to find the Field schematic - is that one still on the way?

6

Hi @pauldee,

Yes, it looks like it’s missing, so I will inform the team about this.
And I will let you know when it’s available on the Field’s product page. Thank you so much for the wait.

1 Like
7

No problem, thank you!

1 Like
8

Hey, a while back I was working on a guitar pedal that used the schematics in the data sheet. Iirc there was line, eurorack level and guitar level interfacing… I can no longer find this. What’s the go?

9

NVM found a fork of the hardware repo:

10

Is the field schematic going to be released soon?

I am looking for an example of how a shift register is hooked up.

11

I am also looking for the schematic, for the same reason!

There is enough info for the shift register and analog muxes in the pinout (which is on the product page):

image
image1398×551 90.2 KB

I assume their intention is to replace the entire schematic with the required information on this page.

12

I don’t have the schematic, but would like to share something I came with to interface 4021 with the Daisy POD. It took me almost 2 months to figure all details and two of my PCBs were wasted in the process. Hopefully this will help the community.

4021
40211078×711 28.1 KB

#include "daisy_pod.h"

using namespace daisy;

// https://github.com/arduino/docs-content/blob/main/content/tutorials/communication/guide-to-shift-in/guide-to-shift-in.md

ShiftRegister4021<1> keyboard_sr_;
// uint8_t keyboard_state_[8];
bool keyboard_state_[8];

struct RGB {
  float R, G, B;
};

static DaisyPod hw;

void BlinkLEDColor(RGB rgb, int led = 0, int delay = 120)
{
  if (led == 0)
    hw.led1.Set(rgb.R, rgb.G, rgb.B);
  else
    hw.led2.Set(rgb.R, rgb.G, rgb.B);

  hw.UpdateLeds();
  System::Delay(delay);
}

void BlinkLED(RGB rgb, int delay = 120)
{
  for (size_t i = 0; i < 3; i++) {
    BlinkLEDColor(rgb, i % 2, delay);
    BlinkLEDColor({0, 0, 0}, i % 2, delay);
  }
}
/*
bool KeyboardState(size_t idx) { return keyboard_state_[idx] == 0x00; }
bool KeyboardRisingEdge(size_t idx) { return keyboard_state_[idx] == 0x80; }
bool KeyboardFallingEdge(size_t idx) { return keyboard_state_[idx] == 0x7F; }
*/

int main(void)
{
  hw.Init();
  hw.SetAudioBlockSize(8);

  BlinkLED({0, 1, 0});

  ShiftRegister4021<1>::Config keyboard_cfg;

  /** CD4021B-Q1: CMOS 8-STAGE STATIC SHIFT REGISTER
   **
   ** Supply Voltage: 3V to 18V
   ** Clock Freq: 3MHz at 5V (less at 3v3) -> 8.5MHz at 15V
   ** Pin Descriptions:
   ** - Parallel Data[1-8] - 7, 6, 5, 4, 13, 14, 115, 1
   ** - Serial Data        - 11
   ** - Clock              - 10
   ** - P/!S               - 9
   ** - Q[6-8]             - 2, 12, 3
   */

  // Physical connections
  // CD4021B PIN 9 (latch) - POD PIN 8
  // CD4021B PIN 10 (clock) - POD PIN 9
  // CD4021B PIN 3 (Q8) - POD PIN 7

  keyboard_cfg.data[0] = hw.seed.GetPin(7);
  keyboard_cfg.latch = hw.seed.GetPin(8);
  keyboard_cfg.clk = hw.seed.GetPin(9);

  // keyboard_cfg.data[0] = seed::D7;
  // keyboard_cfg.latch = seed::D8;
  // keyboard_cfg.clk = seed::D9;
  keyboard_sr_.Init(keyboard_cfg);

  hw.seed.StartLog(false);
  System::Delay(1000);

  uint32_t step = 0;

  while (1) {
    System::Delay(100);
    keyboard_sr_.Update();
    for (size_t i = 0; i < 8; i++) {
      // uint8_t keyidx = (7 - (i % 8));
      // keyboard_state_[i] = keyboard_sr_.State(i) | (keyboard_state_[i] << 1);
      keyboard_state_[i] = keyboard_sr_.State(i);
      hw.seed.PrintLine("keyboard_state_[%d] = %s", i, keyboard_state_[i] ? "on" : "off");
    }
    hw.seed.PrintLine("step=%d", step);
    step++;
  }
}
13

Thank you !!

I just got a 4021 up and running with probably a significant less amount of headache or time wasted than if I had tried to figure this out on my own.

very much appreciated!