I’ve used this for a year or so but one day it stopped working. I haven’t been able to get it working since. It seems that maybe the board no longer works properly. All that works is the backlight, which I can control.
This looks to be the pinout: Pirate Audio Line Out at Raspberry Pi GPIO Pinout
I re-soldered my pins and re-imaged my Micro SD with a fresh install of 32-bit Raspberry Pi OS Lite on my Raspberry Pi 0W v1.1.
My /boot/config.txt below
# For more options and information see
# http://rpf.io/configtxt
# Some settings may impact device functionality. See link above for details
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
# uncomment for composite PAL
#sdtv_mode=2
#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800
# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
dtparam=spi=on
# Uncomment this to enable infrared communication.
#dtoverlay=gpio-ir,gpio_pin=17
#dtoverlay=gpio-ir-tx,gpio_pin=18
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
# Automatically load overlays for detected cameras
camera_auto_detect=1
# Automatically load overlays for detected DSI displays
display_auto_detect=1
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2
# Disable compensation for displays with overscan
disable_overscan=1
[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1
[all]
[pi4]
# Run as fast as firmware / board allows
arm_boost=1
[all]
I’ve tested my pins and they seem to be okay.
curl http://abyz.me.uk/rpi/pigpio/code/gpiotest.zip -O
unzip gpiotest.zip
wget https://github.com/joan2937/pigpio/archive/master.zip
unzip master.zip
cd pigpio-master
make
sudo make install
./gpiotest
This program checks the Pi's (user) gpios.
The program reads and writes all the gpios. Make sure NOTHING
is connected to the gpios during this test.
The program uses the pigpio daemon which must be running.
To start the daemon use the command sudo pigpiod.
Press the ENTER key to continue or ctrl-C to abort...
Testing...
Skipped non-user gpios: 0 1 28 29 30 31
Tested user gpios: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
Failed user gpios: None
I’ve tried this i2cdetect tool, but see nothing in the output, which maybe seems strange?
john@raspberrypi:~ $ i2cdetect -l
i2c-1 i2c bcm2835 (i2c@7e804000) I2C adapter
i2c-2 i2c bcm2835 (i2c@7e805000) I2C adapter
john@raspberrypi:~ $ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
john@raspberrypi:~ $ i2cdetect -y 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
Using GitHub - pimoroni/st7789-python: Python library to control an ST7789 240x240 1.3" TFT LCD display., I’ve tried this script, which just flashes the backlight off for a moment.
from PIL import Image, ImageDraw
from ST7789 import ST7789
image = Image.open('./st7789-combined.jpg').resize((240, 240))
draw = ImageDraw.Draw(image)
st7789 = ST7789(
rotation=90, # Needed to display the right way up on Pirate Audio
port=0, # SPI port
cs=1, # SPI port Chip-select channel
dc=9, # BCM pin used for data/command
backlight=13,
spi_speed_hz=80 * 1000 * 1000
)
st7789.display(image)
This turns off the backlight.
# https://pinout.xyz/pinout/pirate_audio_line_out#
# $ pinout
# need to lower PWM to GPIO 13 (33)
# button Pins: https://github.com/pimoroni/pirate-audio/blob/master/examples/buttons.py
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
# we'll have GPIO package deal with BCM (Broadcom GPIO 00..nn numbers)
# rather than BOARD (Raspberry Pi board numbers)
GPIO.setup(13, GPIO.OUT) # set BCM pin 13 to output a signal
backlight_pin = GPIO.PWM(13, 500) # set BMC pin 13 to pulse signal waves high(on)/low(off) modulated at 500Hz frequency (500 times a second)
backlight_pin.start(100) # for each pulse cycle, the signal should be high (on duty) for 100% of the cycle; duty-cycle = 100%
backlight_pin.ChangeDutyCycle(50) # for each pulse cycle, the signal should be high for 50% of the cycle; duty-cycle = 50%
backlight_pin.stop()