elehobica / pico_crp42602y_ctrl

Control library for CRP42602Y auto-reverse cassette tape deck mechanism by Raspberry Pi Pico

Raspberry Pi Pico CRP42602Y mechanism control

Overview

Control library for CRP42602Y auto-reverse cassette tape deck mechanism

Features

• Generate solenoid pull timing for the function gear of CRP42602Y to support Play A/B, Cueing and Stop control
• Perform auto-stop action by rotation sensor of CRP42602Y
• Support 3 auto-reverse modes (One way, One round and Infinite round)
• Support timeout power disable to stop motor when no operations (optional)
• Provide commands and callbacks for user interface

Supported Board and Peripheral Devices

• Raspberry Pi Pico (rp2040)
• CRP42602Y mechanism
• Need additional circuit to drive solenoid

Pin Assignment & Connection

CRP42602Y connector

Pin #	Name	Function	Connection
1	REC_B_SW	Rec. protection switch of B side (0: not protected, 1: protected)	to Pico GPIO input
2	ROTATION_SENS	Rotation sensor	to Pico GPIO input
3	GEAR_STATUS_SW	Gear status switch (0: in function, 1 not in function)	to Pico GPIO input
4	SOLENOID_1	Solenoid coil 1	from solenoid driver circuit
5	SOLENOID_2	Solenoid coil 2	from solenoid driver circuit
6	GND	GND	GND
7	CASSETTE_DETECT_SW	Cassette detection switch (0: detected, 1: not detected)	to Pico GPIO input
8	P12V	12V Power for motor and IR LED for rotation sensor	from power circuit
9	REC_A_SW	Rec. protection switch of A side (0: not protected, 1: protected)	to Pico GPIO input

Raspberry Pi Pico

Pico Pin #	GPIO	Function	Connection
4	GP2	GPIO Output	to SOLENOID_CTRL of additional circuit (0: release, 1: pull)
5	GP3	GPIO Input	CASSETTE_DETECT from CRP42602Y pin 7
6	GP4	GPIO Input	GEAR_STATUS_SW from CRP42602Y pin 3
7	GP5	GPIO Input	ROTATION_SENS from CRP42602Y pin 2
8	GND	GND	GND
9	GP6	GPIO Output	to POWER_CTRL (optional) (0: disable, 1: enable)

Pin assignments are configurable

Schematic

Control circuit schematic

CRP62402Y_ctrl_schematic

The solenoid driver part is needed at least.

Head circuit (for reference)

CRP62402Y_head_circuit

Polarity information is relative, however, L/R polarities should be aligned.

How to build

• See "Getting started with Raspberry Pi Pico"
• Put "pico-sdk", "pico-examples" and "pico-extras" on the same level with this project folder.
• Set environmental variables for PICO_SDK_PATH, PICO_EXTRAS_PATH and PICO_EXAMPLES_PATH
• Confirmed with Pico SDK 2.0.0

> git clone -b 2.0.0 https://github.com/raspberrypi/pico-sdk.git
> cd pico-sdk
> git submodule update -i
> cd ..
> git clone -b sdk-2.0.0 https://github.com/raspberrypi/pico-examples.git
>
> git clone -b sdk-2.0.0 https://github.com/raspberrypi/pico-extras.git
> 
> git clone -b main https://github.com/elehobica/pico_crp42602y_ctrl.git
> cd pico_crp42602y_ctrl
> git submodule update -i
> cd ..

Windows

• Build is confirmed with Developer Command Prompt for VS 2022 and Visual Studio Code on Windows environment
• Confirmed with cmake-3.27.2-windows-x86_64 and gcc-arm-none-eabi-10.3-2021.10-win32
• Lanuch "Developer Command Prompt for VS 2022"

> cd pico_crp42602y_ctrl
> cd samples\xxxx
> mkdir build && cd build
> cmake -G "NMake Makefiles" ..
> nmake

• Put "xxxx.uf2" on RPI-RP2 drive

Linux

• Build is confirmed with pico-sdk-dev-docker:sdk-2.0.0-1.0.0
• Confirmed with cmake-3.22.1 and arm-none-eabi-gcc (15:10.3-2021.07-4) 10.3.1

$ cd pico_crp42602y_ctrl
$ cd samples/xxxx
$ mkdir build && cd build
$ cmake ..
$ make -j4

• Download "xxxx.uf2" on RPI-RP2 drive