2024年1月21日 · Hello everyone, I currently try to use a MCP23S17 using the library from Rob Tillaart. I successfully can "write" to the ports and control mosfets and status leds. The SPI-connection and basic functionality should work. My problem is the reading of input. I connected the following elements The following code should poll all 16 ports #include <Arduino.h> // #include<DigitalExtender.h> #include ...

2015年2月9日 · C:\Users\JC\Documents\Arduino\libraries\Mcp23s17-master\Mcp23s17.cpp:88:3: error: 'Spi' was not declared in this scope Spi.transfer(write_cmd); ^ Si je comprend bien, l'erreur viens bien de bug dans la librairie MCP23S17 que j'utilise... Comment puis je corriger ces erreurs? existe t il une autre librairie pour le MCP23S17 sans erreur?

2015年12月8日 · /* MCP23S17.cpp Version 0.2 Microchip MCP23S17 SPI I/O Expander Class for Arduino Created by Cort Buffington & Keith Neufeld March, 2011 January, 2013 January, 2015 February, 2016 Features Implemented (by word and bit): I/O Direction Pull-up on/off Input inversion Output write Input read Interrupt features are not implemented in this version ...

2014年5月23日 · 1 x MCP23S17; Datasheets that people are lazy to read; 1 x two inputs digital oscilloscope to view and manually interpret the data stream with pen and paper. My project is to output data on MCP23S17 via software. The GPIO pins are then used to select other MCP23S17 and i/o data via hardware SPI. Soft SPI works, hard SPI does not.

2015年3月16日 · Bonjour, Je me tourne une fois de plus vers vous. Mon objectif est de piloter un afficheur LCD 2*16 charactères via un port expander SPI de chez Microchip, le MCP23S17. J'ai décidé de procéder par étapes, en premier configurer la liaison SPI et contrôler le port expander. Pour cela j'utilise la bibliothèque disponible ici. Ce que je souhaite faire pour le moment c'est allumer des leds ...

2024年3月2日 · i'm building an i/o expander board. I built one earlier with 8 mcp23017 (i2c), works fine. I need more ports so i was thinking about using mcp23s17 (SPI) with a multiplexed CS. So 16 mcp23s17 with separate CS for every chip. my question is how will this work addressing wise? datasheet states one has to bias the A0-A2...fine for the first 8 but what about the next 8? Addresses won't be used ...

2015年9月14日 · Hi there, My apologies if this has already been covered, but I seemed to notice a very odd thing when using the MCP23S17 with the Arduino. Just to let you know, I am using the MCP23S17 library with it, and not plain SPI commands. I will use those next if this doesn't work as planned. Basically, I was trying to talk to the MCP23S17, and it wasn't working. I have three LEDs wired to pins GPB5,6 ...

2014年7月2日 · Bonjour à tous 🙂 Je suis tout nouveau dans la communauté Arduino. Je possède un carte arduino uno rev3 et comme l'indique mon titre je cherche à créer une bibliothèque pour pouvoir utiliser mon port expander de chez Microchip le MCP23S17 pour une liaison SPI. Voici mon header : #ifndef MCP23S17_h #define MCP23S17_h #include "Arduino.h" #include <SPI.h> // Adresse des registres du ...

2017年1月6日 · Hi guy Im looking for an explanation in something that has me stumped. I currently have a MCP23S17 hooked up to the the ESP8266. I use the following library to access the the expander chip: GitHub - n0mjs710/MCP23S17: Arduino Driver for Microchip MCP23S17 So, I hooked up a button with a couple LED's and all works well, except that when the button is high (pushed), I get a reading of 3855 and ...

2024年2月17日 · Hi all, I have a design were I need many chip select on a DAB receiver . The core is an ESP32 with a adding a MCPS17 IO expander 16 IO pins. I have also need 7 chip select. (sorry I can't put the schematic in the post. for made ESP32 chip selection I use a 74HC138 decoder here under the code. //SPI Ports for BIT on "ESP32_DAB_SI4684_commande" PCB board #define A0 1 // pin ESP32 IO 1 #define A1 ...