/****************************** File: ws2812.c *********************************
 * Author      : Reinhard     23.04.2025
 * Version     : V1.0.0
 * Settings    : MounRiver Studio MCU CH32X035
 * Description : Ansteuerung WS2812/WS2815 per SPI
 *               PA.7(SPI-MOSI) - WS2812/WS2815 Data
 *
 ******************************************************************************/
//--------------------------- Includes
#include "debug.h"
#include "ws2812.h"
#include "gpio_def_x035.h"



// Initialisierung SPI fuer Ansteuerung WS281x
void spi_init_ws(void)     // SPI initialisieren, nur MOSI-Output
{   Set_Pin(SPI1_PORT, SPI1_SCK, MOUT_PP_50);       // SCK alternative Funktion
    Set_Pin(SPI1_PORT, SPI1_MOSI, MOUT_PP_50);       // MOSI alternative Funktion

    RCC->APB2PCENR |= RCC_SPI1EN;   // Takt f¨¹r SPI aktivieren
    SPI1->CTLR1 = SPI_CTLR1_DFF | SPI_CTLR1_SSM | SPI_CTLR1_SSI | SPI_CTLR1_BR_1 | SPI_CTLR1_BR_0 | SPI_CTLR1_MSTR; // SPI konfigurieren
    //            16-Bit Ausgabe  NSS Software    NSS aktiv             Clock / 16 = 3 MHz          SPI-Master
    SPI1->CTLR1 |= SPI_CTLR1_SPE;   // SPI enable
}

// Zeiten nach Website light_ws2812      t1-350ns  t2-900ns t3-1250ns
void send_WS2812(uint32_t *data, uint8_t nLED)   // t1-330ns  t2-1000ns t3-1332ns
{   uint32_t color;
    uint32_t mask;
    uint16_t outdata;
    for (uint8_t n = 0; n < nLED; n++)
    {   color = data[n];
        mask = 0x00800000;
        for (uint8_t i = 0; i < 6; i++)
        {   outdata = 0;
            for (uint8_t j = 0; j < 4; j++)
            {   outdata <<= 4;
                if (color & mask)
                {   outdata |= 0x000E;  }
                else
                {   outdata |= 0x0008;  }
                mask >>= 1;
            }
            spi_out_ws(outdata);
        }
    }
}