towards sparkle

This commit is contained in:
Attila BODY 2018-12-16 17:56:48 +01:00
parent d140baf50e
commit 087af69592
10 changed files with 414 additions and 204 deletions

68
App/App.cpp Normal file
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/*
* App.cpp
*
* Created on: Dec 16, 2018
* Author: abody
*/
#include "main.h"
#include "stm32f1xx_hal.h"
#include "dma.h"
#include "spi.h"
#include "gpio.h"
#include <string.h>
#include "App/Pixel.h"
#include "App/LedBuffers.h"
void convert(uint8_t *src, uint8_t *dst, uint16_t size)
{
static uint8_t const bits[4] = { 0b10001000, 0b10001110, 0b11101000, 0b11101110 };
while(size--) {
uint8_t byte=*src++;
uint8_t duo = 3;
do {
uint8_t mask = 3 << (duo<<1);
*dst++ = bits[(byte & (mask))>>(duo<<1)];
} while(duo--);
}
}
extern "C" void App()
{
#define BRIGHTNESS 4
#define DELAY 10
g_ledBits[sizeof(g_ledBits)-1] = 0;
memset(g_pixels, 0, sizeof(g_pixels));
while(1)
{
for(uint16_t idx=0; idx < NUMPIXELS; idx++)
{
if(idx % 3 == 0) g_pixels[idx].r = BRIGHTNESS;
else if(idx % 3 == 1) g_pixels[idx].g = BRIGHTNESS;
else g_pixels[idx].b = BRIGHTNESS;
convert((uint8_t*)g_pixels, g_ledBits, sizeof(g_pixels));
HAL_SPI_Transmit_DMA(&hspi1, g_ledBits, sizeof(g_ledBits));
while(!g_done);
HAL_Delay(DELAY);
}
for(uint16_t idx=0; idx < NUMPIXELS; idx++)
{
if(idx % 3 == 0) g_pixels[idx].r = 0;
else if(idx % 3 == 1) g_pixels[idx].g = 0;
else g_pixels[idx].b = 0;
convert((uint8_t*)g_pixels, g_ledBits, sizeof(g_pixels));
HAL_SPI_Transmit_DMA(&hspi1, g_ledBits, sizeof(g_ledBits));
while(!g_done);
HAL_Delay(DELAY);
}
}
}

13
App/LedBuffers.c Normal file
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/*
* LedBuffers.c
*
* Created on: Dec 16, 2018
* Author: abody
*/
#include "LedBuffers.h"
Pixel_t g_pixels[NUMPIXELS];
uint8_t g_ledBits[sizeof(g_pixels) * 8 / 2 + 1];

26
App/LedBuffers.h Normal file
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/*
* LedBuffers.h
*
* Created on: Dec 16, 2018
* Author: abody
*/
#ifndef LEDBUFFERS_H_
#define LEDBUFFERS_H_
#include "Pixel.h"
#define NUMPIXELS 144
#ifdef __cplusplus
extern "C" {
#endif
extern Pixel_t g_pixels[NUMPIXELS];
uint8_t g_ledBits[sizeof(g_pixels) * 8 / 2 + 1];
#ifdef __cplusplus
}
#endif
#endif /* LEDBUFFERS_H_ */

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App/Pixel.h Normal file
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/*
* Pixel.h
*
* Created on: Dec 16, 2018
* Author: abody
*/
#ifndef PIXEL_H_
#define PIXEL_H_
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
uint8_t g;
uint8_t r;
uint8_t b;
} Pixel_t;
#ifdef __cplusplus
}
#endif
#endif /* PIXEL_H_ */

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App/Sparkle.cpp Normal file
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/*
* Sparkle.cpp
*
* Created on: Dec 16, 2018
* Author: abody
*/
#include "Sparkle.h"
Sparkle::Sparkle()
{
}
Sparkle::~Sparkle() {
}
void Sparkle::Start(Pixel_t *target, Pixel_t color, Pixel_t fadeSpeed)
{
m_target = target;
*target = color;
m_fadeSpeed = fadeSpeed;
}
bool Sparkle::Step()
{
Pixel_t current = *m_target;
uint8_t remaining = 3;
if(current.b > m_fadeSpeed.r )current.r -= m_fadeSpeed.r;
else {
current.b = 0;
--remaining;
}
if(current.g > m_fadeSpeed.g )current.g -= m_fadeSpeed.g;
else {
current.g = 0;
--remaining;
}
if(current.b > m_fadeSpeed.b )current.b -= m_fadeSpeed.b;
else {
current.b = 0;
--remaining;
}
return remaining != 0;
}

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App/Sparkle.h Normal file
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/*
* Sparkle.h
*
* Created on: Dec 16, 2018
* Author: abody
*/
#ifndef SPARKLE_H_
#define SPARKLE_H_
#include <inttypes.h>
#include "Pixel.h"
class Sparkle {
public:
Sparkle();
~Sparkle();
void Start(Pixel_t *target, Pixel_t color, Pixel_t fadeSpeed);
bool Step();
operator Pixel_t*() { return m_target; }
private:
Pixel_t *m_target = nullptr;
Pixel_t m_fadeSpeed = {1, 1, 1};
};
#endif /* SPARKLE_H_ */