DSP-7S04H

A great Arduino library to communicate with the DSP-7S04H 7 segment 4 digit 2.3" display from Embedded Adventures

Using the library

The Arduino sample sketches show the minimum functions necessary to drive the DSP-7S04H display.

dsp7s04h.setAddress(EA_DSP7S04_ADDR_DEFAULT);

The first function to call, which sets the I2C address to use for communication. Default address is defined in the header file - 0x32

First test

A test function is included in the display's firmware. This can be executed using the function and passing a "1", and "0" to turn it off.

void setTestMode(uns8 on);

Driving segments on the display

Print up to 4 characters on the display

void println(char *str)

Drive the segments individually. Pos is the digit to drive, and the 16-bit data is for the individual segments themselves. Check the datasheet for the mapping of bits to segments.

void setRaw(uns8 pos, uns16 data)

Turn on/off the dot at position position

void setDot(uns8 position);
void clearDot(uns8 position);

To adjust the display brightness

void setBrightness(uns8 level)

Clear the display and turn off all segments

void clearDisplay();

Tested with the following boards

• Arduino Uno/compatible
  • I2C (A4/A5)
• ESP8266 Module (ESP7 and ESP12)
  • I2C (IO4/IO5)
• ESP32 Module
  • I2C (IO21/IO22)

To Do List

• SAMD21-based board compatibility
• include UART Serial interface