object oriented hoverboard firmware
original firmware hack https://github.com/NiklasFauth/hoverboard-firmware-hack modified to conpile as c++ code :-)
main.c contains test code:
class Point {
public:
int x, y;
Point (int c1, int c2) { x = c1; y = c2;}
Point& operator=(Point rhs) {
x = rhs.x; y = rhs.y;
return *this;
}
};
class Complex : public Point {
private:
int &real, &imag;
public:
Complex(int r, int i) : Point (r, i), real (x), imag (y)
{
}
};
You can compile this repo with my online compiler https://pionierland.de/hoverhack/index.php
But nothing happens when you flash the firmware onto the hoverboard controller :-/
changes in Makefile
LIBS = -lc -lc -lrdimon -lnosys #ROBO
CC = $(PREFIX)g++
AS = $(PREFIX)g++ -x assembler-with-cpp
main.c
int abs(int i) //ROBO
{
if (i<0) return -i;
return i;
};
and three times
HAL_GPIO_WritePin(OFF_PORT, OFF_PIN,(GPIO_PinState) 0); //ROBO
setup.c
extern UART_HandleTypeDef huart2; //ROBO
extern DMA_HandleTypeDef hdma_i2c2_rx; //ROBO
extern DMA_HandleTypeDef hdma_i2c2_tx; //ROBO
control.c
extern DMA_HandleTypeDef hdma_i2c2_rx; //ROBO
extern DMA_HandleTypeDef hdma_i2c2_tx; //ROBO
comms.c
extern UART_HandleTypeDef huart2; //ROBO
char uart_buf[100]; //ROBO volatile
int16_t ch_buf[8]; //ROBO volatile
setup.h
void setScopeChannel(uint8_t ch, int16_t val);
void consoleScope();
i only had to add the extern and remove the volatile
Don't really know what the extern does and am not really happy to have removed the volatile.
binary sizes:
hover_c++.bin 23.296 bytes
hover_c.bin 18.260 bytes
The flash size of the stm32f103xe is 512 kB :-)