/*!
 * \file      spi_slave.c
 *
 * \brief     Target spi slave device implementation
 *
 * \copyright Revised BSD License, see section \ref LICENSE.
 *
 * \code
 *
 *            _  __ _       ________    _     
 *           | |/ /(_)___  / ____/ /_  (_)___ 
 *           |   // / __ \/ /   / __ \/ / __ \
 *          /   |/ / / / / /___/ / / / / /_/ /
 *         /_/|_/_/_/ /_/\____/_/ /_/_/ .___/ 
 *                                   /_/      
 *           (C) 2022-2025 XinChip
 *
 * \endcode
 *
 * \author     ( XinChip ) Alex-J
 *
 * \author     ( XinChip )
 */

/*-----------------------------------------------------------------------------------
	                               INCLUDE HEADE FILES
 ------------------------------------------------------------------------------------*/
#include "spi_slave.h"
#include "xc_drv_spi.h"
/*------------------------------------------------------------------------------------
	                                    Macros
 -------------------------------------------------------------------------------------*/
#define  SL_NODMA_BUFFER_LEN            16U
/*------------------------------------------------------------------------------------
	                                 Global Variables
 -------------------------------------------------------------------------------------*/

/*------------------------------------------------------------------------------------
	                                    Functions
 -------------------------------------------------------------------------------------*/
/**
 * @brief       spi_slave_demo
 * @details
 * @param       void
 * @retval      void
 */
void spi_slave_demo(void)
{
    DEBUG("__SPI_SLAVE_DEMO__\r");

    SPI_InitCfg_t spi_cfg      = {0};
    GPIO_InitCfg_t gpio_cfg    = {0};

    gpio_cfg.Mux              = GPIO_Mux0;
    gpio_cfg.Dir              = GPIO_DIR_INPUT;
    gpio_cfg.FunSel           = SSI1_CLK;
    gpio_cfg.Int              = NOT_INT;
    gpio_cfg.Pull             = GPIO_PULLDOWN;
    gpio_cfg.Pin              = GPIO_5;

    xc_gpio_init(&gpio_cfg);

    gpio_cfg.FunSel           = SSI1_SSN;
    gpio_cfg.Pin              = GPIO_15;
    xc_gpio_init(&gpio_cfg);

	gpio_cfg.Dir              = GPIO_DIR_OUTPUT;
    gpio_cfg.FunSel           = SSI1_TX;
    gpio_cfg.Pin              = GPIO_16;
    xc_gpio_init(&gpio_cfg);

	gpio_cfg.Dir              = GPIO_DIR_INPUT;
    gpio_cfg.FunSel           = SSI1_RX;
    gpio_cfg.Pin              = GPIO_17;
    xc_gpio_init(&gpio_cfg);

    spi_cfg.Mode                 = SPI_MODE_SLAVE;
    spi_cfg.DataSize             = SSI_CTRL0_DFS_LEN_8BIT;
    spi_cfg.Direction            = SSI_CTRL0_TMOD_WR;
    spi_cfg.BaudRatePrescaler    = SSI_BAUD_DIV_8;
    spi_cfg.CLKPolarity          = SSI_CTRL0_SCPOL_LOW;
    spi_cfg.CLKPhase             = SSI_CTRL0_SCPHA_TRAIL;
    spi_cfg.FirstBit             = SPI_FirstBit_MSB;

    uint8_t spi_handle        = SPI1_IDX;

    xc_spi_init(spi_handle, &spi_cfg);

    uint8_t txbuff[SL_NODMA_BUFFER_LEN];
    uint8_t rxbuff[SL_NODMA_BUFFER_LEN];
	
    xc_spi_rxftl_fifo_set(spi_handle, SSI_RXFTL_FIFO_7);
    xc_spi_enable_it(spi_handle, SSI_IE_RXFIE_ENABLE);

    DEBUG("Write buffer: \n");
    for (int i = 0; i < sizeof(txbuff); i++) {
        txbuff[i] = i + 1;
        PRINT("%02x ", txbuff[i]);
    }
    PRINT("\n");
	
	xc_spi_write_and_read_data(spi_handle,(uint8_t *)txbuff,sizeof(txbuff),
                                    (uint8_t *)rxbuff,sizeof(rxbuff));

    DEBUG("Read buffer: \n");
    for (int i = 0; i < sizeof(rxbuff); i++) {
        PRINT("%02x ", rxbuff[i]);
    }
    PRINT("\n");
    DEBUG("__SPI_END__\n");

    DEBUG("Write buffer: \n");
    memset((uint8_t *)txbuff, 0xbb, sizeof(txbuff));
    for (int i = 0; i < sizeof(txbuff); i++) {
        PRINT("%02x ", txbuff[i]);
    }
    PRINT("\n");

    xc_spi_write_and_read_data(spi_handle,(uint8_t *)txbuff,sizeof(txbuff),
                                    (uint8_t *)rxbuff,sizeof(rxbuff));


    DEBUG("Read buffer: \n");
    for (int i = 0; i < sizeof(rxbuff); i++) {
        PRINT("%02x ", rxbuff[i]);
    }
    PRINT("\n");
    DEBUG("__SPI_END2__\n");

}