Schmurtz Posted April 25, 2018 Posted April 25, 2018 Hi, This topic was a initially a question and become a tutorial to use push buttons on orange pi PC. This tutorial has been made with an Orange PI PC running on "Armbian_5.35_Orangepipc_Debian_jessie_default_3.4.113.img". With this example you will be able to launch 3 different scripts for each push button : /usr/local/bin/run<Wpi GPIO number>short.sh -> immediately launched when a button is pressed /usr/local/bin/run<Wpi GPIO number>long.sh -> launched after a long pression /usr/local/bin/run<Wpi GPIO number>release.sh -> launched when a button is released (but not after a long pression) I've made this image to know easily see the correspondence between WiringOP and physical Orange PI PC connector : Mhhh if you want to modify it, you'll find the excel source file here. Sources : http://orangepi.club/showthread.php?tid=2173 -> excellent tutorial for beginners ! https://github.com/zhaolei/WiringOP -> a modified WiringPi for OrangePi http://nix.zeya.org/wiki/разработка_средств_аппаратного_управления_для_orange_pi_pc -> a very good example of program in C to use Orange PI GPIO with push buttons To install and compile the WiringOP library : mkdir downloads cd downloads git clone https://github.com/zhaolei/WiringOP.git -b h3 cd WiringOP/ sudo ./build Make a test : gpio readall You should obtain something like that : +-----+-----+----------+------+---+-Orange Pi+---+---+------+---------+-----+--+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM | +-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+ | | | 3.3v | | | 1 || 2 | | | 5v | | | | 12 | 8 | SDA.0 | ALT5 | 0 | 3 || 4 | | | 5V | | | | 11 | 9 | SCL.0 | ALT5 | 0 | 5 || 6 | | | 0v | | | | 6 | 7 | GPIO.7 | ALT3 | 0 | 7 || 8 | 0 | ALT3 | TxD3 | 15 | 13 | | | | 0v | | | 9 || 10 | 0 | ALT3 | RxD3 | 16 | 14 | | 1 | 0 | RxD2 | ALT3 | 0 | 11 || 12 | 0 | ALT3 | GPIO.1 | 1 | 110 | | 0 | 2 | TxD2 | ALT3 | 1 | 13 || 14 | | | 0v | | | | 3 | 3 | CTS2 | IN | 1 | 15 || 16 | 0 | ALT3 | GPIO.4 | 4 | 68 | | | | 3.3v | | | 17 || 18 | 0 | ALT3 | GPIO.5 | 5 | 71 | | 64 | 12 | MOSI | ALT4 | 0 | 19 || 20 | | | 0v | | | | 65 | 13 | MISO | ALT4 | 0 | 21 || 22 | 0 | ALT3 | RTS2 | 6 | 2 | | 66 | 14 | SCLK | ALT4 | 0 | 23 || 24 | 0 | ALT4 | CE0 | 10 | 67 | | | | 0v | | | 25 || 26 | 0 | ALT5 | GPIO.11 | 11 | 21 | | 19 | 30 | SDA.1 | ALT5 | 0 | 27 || 28 | 0 | ALT5 | SCL.1 | 31 | 18 | | 7 | 21 | GPIO.21 | IN | 1 | 29 || 30 | | | 0v | | | | 8 | 22 | GPIO.22 | IN | 1 | 31 || 32 | 0 | ALT3 | RTS1 | 26 | 200 | | 9 | 23 | GPIO.23 | IN | 1 | 33 || 34 | | | 0v | | | | 10 | 24 | GPIO.24 | IN | 1 | 35 || 36 | 0 | ALT3 | CTS1 | 27 | 201 | | 20 | 25 | GPIO.25 | ALT5 | 0 | 37 || 38 | 0 | ALT3 | TxD1 | 28 | 198 | | | | 0v | | | 39 || 40 | 0 | ALT3 | RxD1 | 29 | 199 | +-----+-----+----------+------+---+----++----+---+------+----------+-----+-----+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi | BCM | +-----+-----+----------+------+---+-Orange Pi+---+------+----------+-----+-----+ Now we are going to write a program in C to detects pushes on buttons : nano pushbuttons.c The copy / paste the C program below : (you should modify the numbers of buttons that you use, the WiringOP pins that you use, you can create scripts later) Reveal hidden contents // Example of GPIO use On Orange PI PC // To use with push buttons : this program run scripts when a button is pushed / released or when it is pressed during a long time // Version 1.0 // By Schmurtz // https://forum.armbian.com/topic/7067-orange-pi-pc-how-to-use-gpio-for-push-buttons-tutorial/ // Sources : // http://orangepi.club/showthread.php?tid=2173 -> excellent tutorial for beginners ! // https://github.com/zhaolei/WiringOP -> a modified WiringPi for OrangePi // http://nix.zeya.org/wiki/разработка_средств_аппаратного_управления_для_orange_pi_pc -> a very good example of program in C to use Orange PI GPIO with push buttons */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <wiringPi.h> // === Paramètres personnalisables === # define num 4 // Number of PINs used unsigned int nums = 4; // Number of PINs used again unsigned int WpiPinsSelection[] = {21, 22, 23, 24}; // List of GPIO used by buttons in Wpi semantics unsigned char script_path[50] = "/usr/local/bin/"; // Folder where the scripts will be executed unsigned int delay_time = 40; // Delay in ms between each check of GPIO // Calculer en fonction du nombre total de boutons. // === Global Variables === unsigned int curr_state[num]; // array of current states unsigned int old_state[num]; // array of previous states unsigned int trigg_0; // trigger event for all inactive inputs unsigned int act_inputs = 0; // variable of the number of active inputs unsigned int i; // counter unsigned int CountTime = 0; // counter for the time of pressed buttons unsigned int MaxCountTime = 40; // Number of CountTime periods before running a long pression action for example : 40 * 40 = 1600 ms + execution time unsigned char presstype[7]; // short press , long press or realease // following pins assignation is probably good only for Orange PI PC only unsigned int OpiPinsAvailable[] = {3, 5, 7, 8, 10, 11, 12, 13, 15, 16, 18, 19, 21, 22, 23, 24, 26, 27, 28, 29, 31, 32, 33, 35, 36, 37, 38, 40}; // physical pins unsigned int WpiPinsAvailable[] = {8, 9, 7, 15, 16, 0, 1, 2, 3, 4, 5, 12, 13, 6, 14, 10, 11, 30, 31, 21, 22, 26, 23, 24, 27, 25, 28, 29}; // wiringPi pins // === FONCTIONS === // Find the physical PIN on opi from selected wiringPi pin unsigned int find_OpiPin(unsigned int WpiPin ) { int j; for (j = 0; j < 27; j++) // We loop through all the pins to find the correct PIN { if (WpiPin == WpiPinsAvailable[j]) { return OpiPinsAvailable[j]; } } } // Function of starting an external process void run_script(unsigned int act_butt_num, unsigned char ActionType[] ) { printf(" ============= Action : %s from WPI pin %d (physical pin %d) =============\n", ActionType, WpiPinsSelection[i], find_OpiPin(WpiPinsSelection[i])); unsigned char command[50]; sprintf(command, "%s" "%s" "%u" "%s" "%s", script_path, "run", act_butt_num, ActionType, ".sh"); // Create command system (command); // Run the child process return; } // GPIO initialization function void init_gpio() { wiringPiSetup(); // Select the output numbering system - wiringPi, look at the output wPi column gpio readall for (i = 0; i < nums; i++) // We loop through all the pins and set each parameter { printf("init WiringOP GPIO %d - Physical Opi PC Pinout : %d \n", WpiPinsSelection[i], find_OpiPin(WpiPinsSelection[i])); pinMode(WpiPinsSelection[i], INPUT); // Set the port function to input pullUpDnControl(WpiPinsSelection[i], PUD_UP); // Connect the pull-up extension. resistor from the power bus } return; } // Input polling function void scan_inputs() { act_inputs = 0; // Reset the active input counter for (i = 0; i < nums; i++) // We loop through all the inputs { curr_state[i] = digitalRead(WpiPinsSelection[i]); // Record the state of each entry in the array of current states /* // For debugging ! printf("i : %d", i); printf(" Pin: %d", WpiPinsSelection[i]); printf(" Oldstate: %d", old_state[i]); printf(" State: %d\n", curr_state[i]);*/ if (curr_state[i] == 0) // If the input is active - the increment of the counter { act_inputs++; // printf("act_input: %u\n" , act_inputs); } } //printf("-----\n"); return; } // Function of copying state arrays from new to old void copy_states() { for (i = 0; i < nums; i++) { old_state[i] = curr_state[i]; } return; } // Initialize the previous state array // After startup, no input is active void old_state_init() { for (i = 0; i < nums; i++) { old_state[i] = 1; } return; } // Function of comparing states and performing actions - the logic of actions void logic() { if (act_inputs == 0) // === If there are no active inputs ... { for (i = 0; i < nums; i++) { // if state is now desactivated if (curr_state[i] == 1 && old_state[i] == 0) { printf(" ----- info : PIN %d has been activate during %d periods ----- \n", WpiPinsSelection[i], CountTime); if (CountTime < MaxCountTime) { // unsigned char command[50]; //printf("short press released on PIN %d\n",WpiPinsSelection[i] ); run_script(WpiPinsSelection[i], "release"); // sprintf(command, "%s" "%s" "%u" "%s", script_path, "run", act_butt_num, ".sh"); // Forme la commande en tant que texte // system (command); // Exécute le processus fils } } } copy_states(); CountTime = 0 ; if (trigg_0 == 1) // ... and if the inactivity event trigger is set ... { return; // ... complete the function } else // ... otherwise cock the trigger and execute the zero-action script { trigg_0 = 1; // ... // run_script(0); return; } } else if (act_inputs > 1) // === If there are more than two active inputs - update the state and exit { printf("act_inputs > 1"); return; } else if (act_inputs == 1) // === If there is one active input - start comparison { trigg_0 = 0; // Reset the Zero Activity Trigger for (i = 0; i < nums; i++) { // if state changed in activated state if (curr_state[i] == 0 && old_state[i] == 1) { old_state[i] = curr_state[i]; run_script(WpiPinsSelection[i], "short"); } // if state is desactivated else if (curr_state[i] == 1 && old_state[i] == 0) { old_state[i] = curr_state[i]; printf("Never Ever ! Never Ever ! Never Ever ! Never Ever ! Never Ever !"); } else if (curr_state[i] == 0 && old_state[i] == 0) { CountTime++; if (CountTime == MaxCountTime) { // printf("Long Press from %d !!!!! -----> ", WpiPinsSelection[i]); run_script(WpiPinsSelection[i], "long"); } } } return; } } // === Controller === int main(void) { // printf ("start\n"); // debug init_gpio(); // Initialize GPIO old_state_init(); // Initial initialization of the array of old states scan_inputs(); // We make the first poll of the inputs while (1) { logic(); // process states and perform actions scan_inputs(); // scan the inputs delay (delay_time); // delay between polls } return 0; } OK now compile it and run it : gcc -lwiringPi -lwiringPiDev -o pushbuttons pushbuttons.c ./pushbuttons Press a button and you're done FYI : To use the native button on the motherboard of the orange PI PC you can use "acpid" to make working for reboot I hope it will be useful to some of you.
Schmurtz Posted April 30, 2018 Author Posted April 30, 2018 I finally turned this topic in a tutorial for the community
jackandjohn Posted March 10, 2019 Posted March 10, 2019 Successfully used this on an Orange Pi Zero with unsigned int nums = 2; unsigned int WpiPinsSelection[] = {8, 24}; Pin "24" corresponds to physical pin 26 as per this pinout guide:
JRD McLAREN Posted September 21, 2020 Posted September 21, 2020 Nice script, but it's not working on my OPiZeroPlus2 H5 The problem is outdated WiringPO library - from zhaolei More updated library from Orange http://www.orangepi.org/Docs/WiringPi.html can be compiled on actual armbian gpio recognize opizeroplus2 board, but pushbuttons script frozen hole board ... Is any project on sf or github for these boards and GPIO contol ..??
Igor Posted September 22, 2020 Posted September 22, 2020 On 9/21/2020 at 3:59 PM, JRD McLAREN said: Is any project on sf or github Expand Google can tell you that ... but rather perhaps check here https://forum.armbian.com/forum/34-hardware-hacks/
JRD McLAREN Posted October 1, 2020 Posted October 1, 2020 Thanks for answer Igor .. I'm wrote my own script in python, moved to OPi Zero with poor XR819 .. Better OPi Zero Plus H5 with RTL8189FTV wifi module was burned ... and H5 board does notwork properly with WiringPO library at this moment .. see:
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