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sk.h
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sk.h
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#ifndef SK_H
#define SK_H 1
#include "driver/rmt.h"
//Use RMT for a strip of SK6812 RGBW leds
class sk{
public:
sk(void){}
~sk(void){
free( _skstrip);
rmt_driver_uninstall( skconfig.channel );
}
/*-------------------------------------------------------------------------*/
int begin( int pin, int count){
_bitcount = count*32;
_ledpin = pin;
_ledcount = count;
_brightness = 100;
int rc;
_skstrip = (rmt_item32_t *)calloc( _bitcount, sizeof( rmt_item32_t ) );
skconfig.rmt_mode = RMT_MODE_TX;
skconfig.channel = RMT_CHANNEL_7;
skconfig.gpio_num = (gpio_num_t)_ledpin;
skconfig.mem_block_num = 1;
skconfig.tx_config.loop_en = 0;
skconfig.tx_config.carrier_en = 0;
skconfig.tx_config.idle_output_en = 1;
skconfig.tx_config.idle_level = RMT_IDLE_LEVEL_LOW;
skconfig.tx_config.carrier_level = RMT_CARRIER_LEVEL_HIGH;
skconfig.clk_div = 8; // 80MHx / 8 = 10MHz translates to 0,1 us = 100 ns per count
rmt_config( &skconfig);
rc = rmt_driver_install( skconfig.channel, 0, 0); // rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size, int rmt_intr_num)
return(rc);
}
/*-------------------------------------------------------------------------*/
uint32_t getcolor( uint8_t r,uint8_t g,uint8_t b,uint8_t w ){
uint32_t kleur=0;
kleur |= ((uint32_t)g<<24);
kleur |= ((uint32_t)r<<16);
kleur |= ((uint32_t)b<<8);
kleur |= (uint32_t)w;
return( kleur );
}
/*-------------------------------------------------------------------------*/
uint32_t breakcolor( uint32_t kleur, uint8_t *r,uint8_t *g,uint8_t *b,uint8_t *w ){
*g = (kleur >> 24 )&0xff;
*r = (kleur >> 16 )&0xff;
*b = (kleur >> 8 )&0xff;
*w = kleur&0xff;
return( kleur );
}
/*-------------------------------------------------------------------------*/
void color32( int led, uint32_t kleur, int brightness = -1 ){
uint8_t r,g,b,w;
breakcolor( kleur,&r,&g,&b,&w);
color( led, r,g,b,w, brightness);
}
/*-------------------------------------------------------------------------*/
void color( int led, uint8_t red,uint8_t green,uint8_t blue,uint8_t white, int brightness = -1 ){
uint32_t kleur=0, bright;
uint8_t r = red, g = green, b = blue, w = white;
int i,bit;
if ( led < 0 || led >= ledcount() ) return;
//Serial.printf( "---\nrgbw = %d.%d.%d.%d\n", red,green,blue,white);
// brightness is a percentage 0...100
bright = brightness;
if ( brightness == -1 ) bright = 100;
bright = (bright * _brightness) /100;
r = bright*red/100;
g = bright*green/100;
b = bright*blue/100;
w = bright*white/100;
//Serial.printf("_brightness = %d, brightness %d, bright %d\n", _brightness, brightness, bright);
//Serial.printf( "rgbw = %d.%d.%d.%d\n---\n", r,g,b,w);
kleur |= ((uint32_t)g<<24);
kleur |= ((uint32_t)r<<16);
kleur |= ((uint32_t)b<<8);
kleur |= (uint32_t)w;
//Serial.printf("Set color of led %d kleur %08X\n", led, kleur);
// sk6812 has around 600us/600us 1, 300/900us 0
for (i=(led*32),bit=0; bit<32; bit++){
if ( (kleur & (1<<(31-bit))) ) {
_skstrip[i].level0 = 1;
_skstrip[i].duration0 = 6;
_skstrip[i].level1 = 0;
_skstrip[i].duration1 = 6;
} else {
_skstrip[i].level0 = 1;
_skstrip[i].duration0 = 3;
_skstrip[i].level1 = 0;
_skstrip[i].duration1 = 9;
}
//if ( bit == 31 ) _skstrip[i].duration1 += 60;
++i;
}
return;
}
/*-------------------------------------------------------------------------*/
void show(){
int rc;
// esp_err_t rmt_write_items(rmt_channel_t channel, rmt_item32_t *rmt_item, int item_num, bool wait_tx_done)
rc = rmt_write_items(skconfig.channel, _skstrip, _bitcount, 1);
delay(2);
}
/*-------------------------------------------------------------------------*/
void clear( void ){
for ( int i =0; i < _ledcount;++i ) {
color(i,0,0,0,0);
}
show();
delay(10);
}
/*-------------------------------------------------------------------------*/
uint8_t setbrightness(uint8_t newbrightness ){
_brightness = newbrightness;
return( _brightness );
}
/*-------------------------------------------------------------------------*/
uint8_t getbrightness(){
return( _brightness );
}
/*-------------------------------------------------------------------------*/
int ledcount(){
return( _ledcount);
}
/*-------------------------------------------------------------------------*/
private:
int _ledcount;
int _bitcount;
int _ledpin;
int _brightness;
rmt_item32_t* _skstrip = NULL;
rmt_config_t skconfig;
float _realtick;
};
#endif