| /*******************Demo for MQ-2 Gas Sensor Module V1.0***************************** | |
| Support: Tiequan Shao: support[at]sandboxelectronics.com | |
| Lisence: Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) | |
| Note: This piece of source code is supposed to be used as a demostration ONLY. More | |
| sophisticated calibration is required for industrial field application. | |
| Sandbox Electronics 2011-04-25 | |
| ************************************************************************************/ |
2017-03-03 fm4dd
The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.
These flags can both be used to set the CPU type. Setting one or the other is sufficient.
| http://blog.pagefault-limited.co.uk/wemos-lolin32-pinout-vs-wemos-lolin32-lite-pinout |
| /************************************************************************** | |
| ** ResizeDDA -- Reads an image from file 'f' one scan line at a time, | |
| ** outputs the image resized by the 'zoom' factor. | |
| */ | |
| void ResizeDDA(FILE *f, int rows, int cols, double zoom) | |
| { | |
| unsigned char *aspline, *line; | |
| int x, y; | |
| int ddax, dday, izoom, i, k; | |
| extern int getline(FILE *, int, unsigned char *); |
| //convert RGB565 to RGB888 | |
| byte src[] = loadBytes("ui.bin"); | |
| byte dst[] = new byte[src.length/2*3]; | |
| for (int i=0, j=0; i<src.length; i+=2) { | |
| int c = src[i] + (src[i+1]<<8); | |
| byte r = byte(((c & 0xF800) >> 11) << 3); | |
| byte g = byte(((c & 0x7E0) >> 5) << 2); | |
| byte b = byte(((c & 0x1F)) << 3); |
| // High-accuracy square wave generator | |
| // based on ESP8266 | |
| // with runtime adjustable frequency, PWM width and offset | |
| // Output wave at pin 5 (configurable from 0 to 15, but not 16) | |
| // by James Swineson <github@public.swineson.me>, 2017-10 | |
| // https://gist.github.com/Jamesits/92394675c0fe786467b26f90e95d3904 | |
| // See https://blog.swineson.me/implementation-of-6mbps-high-speed-io-on-esp8266-arduino-ide/ | |
| // for more information (article in Chinese) | |
| // Arduino UNO version: https://gist.github.com/Jamesits/8d164818946a65d0cafcd6203e3e5049 |
| /* | |
| Features | |
| Module supports external voltage input of the 4-way acquisition (voltage input range of 0-5v) | |
| integrated photoresistor | |
| integrated thermistor | |
| integrated potentiometer | |
| Modules power indicator | |
| Modules with DA output indicator, when the module DA output interface voltage reaches a certain value, will be lit panel the DA output indicator, the higher the voltage, the more obvious indicator brightness | |
| Remove shunts to bypass on board integrated devices | |
| The left connector |
| /* | |
| * Arduino Microwave Radar Motion Sensor Interface | |
| * https://Circuits4you.com | |
| * Oct 2018 | |
| */ | |
| int Sensor = 2; //Input Pin | |
| int LED = 13; // Led pin for Indication | |
| int flg = 0; //Change detection flag |
| https://github.com/espressif/arduino-esp32/issues/1024#issuecomment-360324759 | |
| Got it working! | |
| I will post here my notes and results so others know what to expect! | |
| I did this in a Pine64+ ARM (a 64bit ARM SBC). | |
| Before running this I had installed Arduino IDE with this script: https://github.com/pfeerick/pine64-scripts/blob/master/install-arduino-ide.sh | |
| To install ESP32 toolchain on Armbian: | |
| See: http://esp-idf.readthedocs.io/en/latest/get-started/linux-setup-scratch.html |
| /***************************************************************************** | |
| * | |
| * Atmel Corporation | |
| * | |
| * File : main.c | |
| * Compiler : IAR EWAAVR 2.28a/3.10c | |
| * Revision : $Revision: 1.1 $ | |
| * Date : $Date: Wednesday, July 13, 2005 10:43:44 UTC $ | |
| * Updated by : $Author: omella $ | |
| * |