neopixel_f103_mvp/App/App.cpp
2020-12-02 00:11:20 +01:00

184 lines
4.2 KiB
C++

/*
* App.cpp
*
* Created on: Dec 16, 2018
* Author: abody
*/
#include <stm32f1xx_ll_dma.h>
#include "main.h"
#include "dma.h"
#include "spi.h"
#include "gpio.h"
#include <string.h>
#include <stdlib.h>
#include "Config.h"
#include "Pixel.h"
#include "LedBuffers.h"
#include "Sparkle.h"
Sparkle g_sparkles[NUMSPARKLES];
volatile uint8_t g_spi_idle = 0;
volatile uint8_t g_buffer_in_transmit;
volatile uint16_t g_pixels_converted = 0;
volatile uint32_t g_tick = 0;
#define MIN(a,b) ((a) < (b) ? (a) : (b))
void convert(uint8_t *src, uint8_t *dst, uint16_t src_size)
{
static uint8_t const bits[4] = { 0b10001000, 0b10001110, 0b11101000, 0b11101110 };
while(src_size--) {
uint8_t byte=*src++;
for(int8_t shift = 6; shift >= 0; shift -= 2) {
uint8_t mask = 3 << shift;
*dst++ = bits[ (byte & mask) >> shift ];
}
}
}
inline uint16_t rr(uint16_t top)
{
return rand() % top;
}
uint16_t ChoosePixel()
{
#ifndef DBG_CHOSEN_PIXEL
volatile uint16_t chosen;
uint16_t spi;
do {
chosen = rr(NUMPIXELS);
for(spi=0; spi<NUMSPARKLES; ++spi) {
if(static_cast<pixel_t*>(g_sparkles[spi]) && static_cast<pixel_t*>(g_sparkles[spi]) == &g_pixels[chosen])
break;
}
} while(spi < NUMSPARKLES);
return chosen;
#else
return DBG_CHOSEN_PIXEL;
#endif // DBG_CHOSEN_PIXEL
}
void StartSparkle( Sparkle &s )
{
#ifndef DBG_CHOSEN_PIXEL
s.Start(g_pixels+ChoosePixel(), rr(32), Pixel(255,255,255), Pixel(rr(8)+3,rr(8)+3,rr(8)+3));
#else
s.Start(g_pixels+ChoosePixel(), 0, Pixel(255,255,255), Pixel(1, 1, 1));
#endif
}
extern "C" void HandleSystick()
{
++ g_tick;
}
extern "C" uint32_t GetTick()
{
return g_tick;
}
extern "C" void HandleSpiDmaIrq()
{
static bool endframe = false;
static bool endprev = false;
if(LL_DMA_IsActiveFlag_TE3(DMA1)) {
LL_DMA_ClearFlag_TE3(DMA1);
}
else if(LL_DMA_IsActiveFlag_HT3(DMA1) || LL_DMA_IsActiveFlag_TC3(DMA1))
{
if(LL_DMA_IsActiveFlag_HT3(DMA1))
{
LL_DMA_ClearFlag_HT3(DMA1);
g_buffer_in_transmit = 1;
if(endframe)
LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_3, LL_DMA_MODE_NORMAL);
}
else if(LL_DMA_IsActiveFlag_TC3(DMA1))
{
LL_DMA_ClearFlag_TC3(DMA1);
g_buffer_in_transmit = 0;
if(endframe && endprev) {
LL_DMA_DisableChannel(DMA1, LL_DMA_CHANNEL_3);
LL_DMA_SetMode(DMA1, LL_DMA_CHANNEL_3, LL_DMA_MODE_CIRCULAR);
g_spi_idle = true;
endframe = endprev = false;
return;
}
}
endprev = endframe;
uint8_t convert_now = MIN(NUMPIXELS - g_pixels_converted, SPIBUFFER_PIXELS);
if(convert_now)
{
LL_GPIO_TogglePin(GPIOC, LL_GPIO_PIN_13);
convert((uint8_t*)&g_pixels[g_pixels_converted],
g_spibuffer[g_buffer_in_transmit ^ 1],
convert_now * sizeof(pixel_t));
LL_GPIO_TogglePin(GPIOC, LL_GPIO_PIN_13);
g_pixels_converted += convert_now;
}
if(convert_now < SPIBUFFER_PIXELS) {
memset(g_spibuffer[g_buffer_in_transmit ^ 1] + convert_now * SPIBUFFER_PIXEL_SIZE,
0, SPIBUFFER_SIZE - convert_now * SPIBUFFER_PIXEL_SIZE);
endframe = true;
}
}
}
extern "C" void App()
{
uint32_t lastTick = GetTick();
for(uint16_t px = 0; px < NUMPIXELS; ++px)
g_pixels[px] = Pixel(DEFAULT_COLOR);
LL_SYSTICK_EnableIT();
LL_SPI_Enable(SPI1);
LL_SPI_EnableDMAReq_TX(SPI1);
while(1)
{
while(GetTick() - lastTick < FRAMETIME );
lastTick += FRAMETIME;
for(int16_t spi = 0; spi < NUMSPARKLES; ++spi) {
if(static_cast<pixel_t*>(g_sparkles[spi]))
g_sparkles[spi].Step();
else
StartSparkle(g_sparkles[spi]);
}
g_pixels_converted = 0;
convert((uint8_t*)g_pixels, g_spibuffer[0], SPIBUFFER_PIXELS * sizeof(pixel_t));
g_pixels_converted += SPIBUFFER_PIXELS;
convert((uint8_t*)&g_pixels[g_pixels_converted], g_spibuffer[1], SPIBUFFER_PIXELS * sizeof(pixel_t));
g_pixels_converted += SPIBUFFER_PIXELS;
g_buffer_in_transmit = 0;
g_spi_idle = false;
LL_DMA_ConfigAddresses(DMA1, LL_DMA_CHANNEL_3, (uint32_t)g_spibuffer, LL_SPI_DMA_GetRegAddr(SPI1), LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_3, sizeof(g_spibuffer));
LL_DMA_EnableChannel(DMA1, LL_DMA_CHANNEL_3);
LL_DMA_EnableIT_HT(DMA1, LL_DMA_CHANNEL_3);
LL_DMA_EnableIT_TC(DMA1, LL_DMA_CHANNEL_3);
LL_DMA_EnableIT_TE(DMA1, LL_DMA_CHANNEL_3);
while(!g_spi_idle);
}
}