![]() ![]() The results of this study show a table of register data SPI set address that can be used to control the expansion pin on MCP23S17 and pictures of 4 LCD control display.Ĭopyright © 2022 The Author(s) Open Access Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License ( ), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. Data register that used to support SPI communication in this study was obtained from the MCP23S17 datasheet. The method used in this study is a quantitative method. MCP23S17 one to control LCD 1 and LCD 2 while MCP23S17 two to control LCD 3 and LCD 4. The main chip orchestrates communication by providing the clock signal and chip select signal(s) which control any number. This expansion on the Arduino Uno uses 2 MCP23S17. Electronics Programming Units, Software & Microcomputing Arduino & Accessories Accessoires Arduino MAX3421EEHJ+ USB Host Controller with SPI Interface. With the lack of the Arduino Uno, this study is focusing on expand output pin of Arduino Uno so that it has 32 additional pins by making use of internal SPI communication. The running out of the pins owned by the Arduino Uno makes it cannot control many LCD, such as 3 LCDs that require 21 pins. ![]() Arduino Uno is a minimum system board that use atmega 328p as a microcontroller IC (Integrated Circuit). ![]()
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