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// more fun with c++ classes and templates
// http://www.stm32duino.com/viewtopic.php?f=18&t=303
class GPIOPort :
  public gpio_reg_map {
public:
  void high(const uint32_t pin) {
    BSRR = 1 << pin;
  }
  void low(const uint32_t pin) {
    BRR = 1 << pin;

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#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/resource.h>
#include <sys/types.h>


typedef struct s_block* t_block;
struct s_block {
    size_t size;

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How to build avrdude from SVN:

1. svn co svn://svn.savannah.nongnu.org/avrdude/trunk

2. cd trunk/avrdude

3. ./bootstrap

4. ./configure

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/*****************************************************************************
*
* 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 $
*

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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

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/*
 * 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

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/*
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

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// 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

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//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);

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/**************************************************************************
** 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 *);