Adafruit Fruit Jam

A mini credit card sized computer!

by Liz Clark and Tim C

published August 13, 2025, last edited December 27, 2025

posted in Adafruit Products Arduino Compatibles CircuitPython LCDs & Displays/ HDMI Raspberry Pi/ RP2040

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Beginner

Product guide

HSTX DVI Output

The Fruit Jam makes it easy to output DVI signal out of the built-in port with the Adafruit DVI HSTX library.

Note:

This page demonstrates basic usage of a single piece of hardware on the Fruit Jam. The device can be picky about the order that things are initialized when using multiple of the peripherals. If you're doing something involving the display, DAC, WiFi, or USB ports we recommend to start from the factory demo Arduino code and remove anything you don't need, rather than starting from these basic individual examples.

Adafruit Fruit Jam with DVI video port highlighted.

Library Installation

You can install the Adafruit DVI HSTX library for Arduino using the Library Manager in the Arduino IDE.

Arduino IDE with tools menu open and the Manage Libraries item highlighted.

Arduino IDE with library manager pane open and "Adafruit DVI HSTX" in the search box. The Adafruit DVI HSTX Library appears in the results with the install button highlighted.

Click the Tools -> Manage Libraries ... menu item, search for Adafruit DVI HSTX and select the Adafruit DVI HSTX library

If asked about dependencies for any of the libraries, click "Install all".

Arduino IDE dialog asking if the user wants to install dependencies for Adafruit DVI HSTX library.

If the "Dependencies" window does not come up, then you already have the dependencies installed.

If the dependencies are already installed, you must make sure you update them through the Arduino Library Manager before loading the example!

Example Code

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// 16-bit Adafruit_GFX-compatible framebuffer for RP2350 HSTX

#include <Adafruit_dvhstx.h>


#if defined(ADAFRUIT_FEATHER_RP2350_HSTX)
DVHSTXPinout pinConfig = ADAFRUIT_FEATHER_RP2350_CFG;
#elif defined(ADAFRUIT_METRO_RP2350)
DVHSTXPinout pinConfig = ADAFRUIT_METRO_RP2350_CFG;
#elif defined(ARDUINO_ADAFRUIT_FRUITJAM_RP2350)
DVHSTXPinout pinConfig = ADAFRUIT_FRUIT_JAM_CFG;
#elif (defined(ARDUINO_RASPBERRY_PI_PICO_2) || defined(ARDUINO_RASPBERRY_PI_PICO_2W))
DVHSTXPinout pinConfig = ADAFRUIT_HSTXDVIBELL_CFG;
#else
// If your board definition has PIN_CKP and related defines,
// DVHSTX_PINOUT_DEFAULT is available
DVHSTXPinout pinConfig = DVHSTX_PINOUT_DEFAULT;
#endif


DVHSTX16 display(pinConfig, DVHSTX_RESOLUTION_320x240);
// If you get the message "error: 'DVHSTX_PINOUT_DEFAULTx' was not declared"
// then you need to give the pins numbers explicitly, like the example below.
// The order is: {CKP, D0P, D1P, D2P} DVHSTX16 display({12, 14, 16, 18},
// DVHSTX_RESOLUTION_320x240);

void setup() {
  Serial.begin(115200);
  // while(!Serial);
  if (!display.begin()) { // Blink LED if insufficient RAM
    pinMode(LED_BUILTIN, OUTPUT);
    for (;;)
      digitalWrite(LED_BUILTIN, (millis() / 500) & 1);
  }
  Serial.println("display initialized");
}

void loop() {
  // Draw random lines
  display.drawLine(random(display.width()), random(display.height()),
                   random(display.width()), random(display.height()),
                   random(65536));
  sleep_ms(1);
}

// 16-bit Adafruit_GFX-compatible framebuffer for RP2350 HSTX

#include <Adafruit_dvhstx.h>


#if defined(ADAFRUIT_FEATHER_RP2350_HSTX)
DVHSTXPinout pinConfig = ADAFRUIT_FEATHER_RP2350_CFG;
#elif defined(ADAFRUIT_METRO_RP2350)
DVHSTXPinout pinConfig = ADAFRUIT_METRO_RP2350_CFG;
#elif defined(ARDUINO_ADAFRUIT_FRUITJAM_RP2350)
DVHSTXPinout pinConfig = ADAFRUIT_FRUIT_JAM_CFG;
#elif (defined(ARDUINO_RASPBERRY_PI_PICO_2) || defined(ARDUINO_RASPBERRY_PI_PICO_2W))
DVHSTXPinout pinConfig = ADAFRUIT_HSTXDVIBELL_CFG;
#else
// If your board definition has PIN_CKP and related defines,
// DVHSTX_PINOUT_DEFAULT is available
DVHSTXPinout pinConfig = DVHSTX_PINOUT_DEFAULT;
#endif


DVHSTX16 display(pinConfig, DVHSTX_RESOLUTION_320x240);
// If you get the message "error: 'DVHSTX_PINOUT_DEFAULTx' was not declared"
// then you need to give the pins numbers explicitly, like the example below.
// The order is: {CKP, D0P, D1P, D2P} DVHSTX16 display({12, 14, 16, 18},
// DVHSTX_RESOLUTION_320x240);

void setup() {
  Serial.begin(115200);
  // while(!Serial);
  if (!display.begin()) { // Blink LED if insufficient RAM
    pinMode(LED_BUILTIN, OUTPUT);
    for (;;)
      digitalWrite(LED_BUILTIN, (millis() / 500) & 1);
  }
  Serial.println("display initialized");
}

void loop() {
  // Draw random lines
  display.drawLine(random(display.width()), random(display.height()),
                   random(display.width()), random(display.height()),
                   random(65536));
  sleep_ms(1);
}