/*
 * spi.c
 *
 *  Created on: 2021Äê6ÔÂ26ÈÕ
 *      Author: graydon
 */
#include <stdint.h>
#include <stdio.h>
#include <services/int/adi_int.h>
#include <signal.h>
#include "spi.h"
#include "gpio.h"
#include "config.h"
#include <drivers/spi/adi_spi.h>

#define MASTER 0
#define CPHA 1
#define CPOL 0
#define BITS 0 //8-bit
#define CS 1
#define MSIZE 0
#define PSIZE 0

volatile unsigned char 	SPI_Tx_BUFFER[SPI_BUFFER_SIZE];
volatile unsigned char 	SPI_Rx_BUFFER[SPI_BUFFER_SIZE];
//
volatile short SPIRxDone =1;
volatile short SPITxDone =1;
static void SPIDMA_Handler(uint32_t iid, void* arg)
{
	if(iid == INTR_SPI2_RXDMA){
		*pREG_DMA27_STAT |= ENUM_DMA_STAT_IRQDONE ;
		GPIO_SetOutPut(GPIOA, GPIO_Pin12|GPIO_Pin13, GPIO_HIGH);
		GPIO_SetOutPut(GPIOB, GPIO_Pin5, GPIO_HIGH);

		GPIO_SetOutPut(GPIOC, GPIO_Pin4|GPIO_Pin7, GPIO_HIGH);

		SPIRxDone = 1;
		SPITxDone = 1;
	}
//	else if(iid == INTR_SPI2_TXDMA) {
//		*pREG_DMA26_STAT |= ENUM_DMA_STAT_IRQDONE ;
//		GPIO_SetOutPut(GPIOC, GPIO_Pin4, GPIO_HIGH);
//		SPITxDone = 1;
//	}
//	adi_int_ClearPending(iid);
}

static void DMAConfig(SPIStatus status)
{
	if(status == SPI_TX) {
		*pREG_DMA26_CFG 		= (MSIZE<<8) | (PSIZE<<4) | 4 ;
		*pREG_DMA26_XCNT 	= 	SPI_BUFFER_SIZE;
		*pREG_DMA26_XMOD 	= 	1;
		*pREG_DMA26_ADDRSTART= 	(uint32_t)SPI_Tx_BUFFER|MP_OFFSET;
		*pREG_DMA26_CFG	   |= 	1 ;

		*pREG_SPI2_TXCTL  |= (1<<0);
	}

	if(status == SPI_RX) {
		*pREG_DMA27_CFG 		= (1<<1)| (MSIZE<<8) | (PSIZE<<4)  | (1<<20) | 4 ;
		*pREG_DMA27_XCNT 	= 	SPI_BUFFER_SIZE;
		*pREG_DMA27_XMOD 	= 	1;
		*pREG_DMA27_ADDRSTART= 	(uint32_t)SPI_Rx_BUFFER|MP_OFFSET;
		*pREG_DMA27_CFG	   |= 	1 ;

		*pREG_SPI2_RXCTL |= (1<<0);

	}
}

void SPI_xfer(int8_t* rx, int8_t* tx, uint32_t len)
{
	int i;
	*pREG_SPI2_RWC	= SPI_BUFFER_SIZE;
	*pREG_SPI2_TWC	= SPI_BUFFER_SIZE;

	for(i=0; i < len; i++) {
		*pREG_SPI2_TFIFO = tx[i];
		while(*pREG_SPI2_STAT&(1<<23));

		while(*pREG_SPI2_STAT&(1<<22));
		rx[i] = *pREG_SPI2_RFIFO;
	}
}


int SPI2_Init()
{

	*pREG_SPI2_CLK =0 ;// spi slave.
	*pREG_SPI2_DLY = (1<<0)|(1<<8)|(1<<9);
	*pREG_SPI2_CTL = (MASTER<<1)|(0<<3)|(CPHA<<4)|(CPOL<<5)|(1<<6)|(1<<8)|(BITS<<9);


	*pREG_SPI2_TXCTL =  (1<<4);
	*pREG_SPI2_RXCTL =  (1<<4);


	*pREG_SPI2_TWCR = 0;
	*pREG_SPI2_RWCR = 0;

	*pREG_SPI2_SLVSEL = 0xfe00;
	if(MASTER) {
		*pREG_SPI2_SLVSEL |= 1<<CS;
	}


	//SPI2_SetTransMode(status);
	adi_sec_SetPriority(INTR_SPI2_RXDMA, 44);
	//interruptcb(INTR_SPI2_RXDMA, SPIDMA_Handler);
	//adi_int_InstallHandler(INTR_SPI2_TXDMA, SPIDMA_Handler, 0, true);
	adi_int_InstallHandler(INTR_SPI2_RXDMA, SPIDMA_Handler, 0, true);

	*pREG_SPI2_CTL 	|= (1<<0);
	//*pREG_SPI2_TXCTL |= (1<<0);
	//*pREG_SPI2_RXCTL |= (1<<0);

//	while(1) {
//		int i;
//		SPI_xfer(SPI_Rx_BUFFER ,SPI_Tx_BUFFER ,SPI_BUFFER_SIZE);
//		for(i=0;i<SPI_BUFFER_SIZE;i++) {
//			SPI_Tx_BUFFER[i] = SPI_Rx_BUFFER[i];
//		}
//	}

	return 0;
}


void SPI2_SetTransMode(SPIStatus status)
{
	switch(status) {
	case SPI_TX:
		DMAConfig(status);
		SPITxDone = 0 ;
		GPIO_SetOutPut(GPIOA, GPIO_Pin12, GPIO_LOW);
		GPIO_SetOutPut(GPIOC, GPIO_Pin4, GPIO_LOW);
		break;
	case SPI_RX:
		DMAConfig(status);
		SPIRxDone = 0 ;
		GPIO_SetOutPut(GPIOA, GPIO_Pin13, GPIO_LOW);
		GPIO_SetOutPut(GPIOB, GPIO_Pin5, GPIO_LOW);
		GPIO_SetOutPut(GPIOC, GPIO_Pin7, GPIO_LOW);
		break;
	case SPI_TRX:
		DMAConfig(SPI_TX);SPITxDone = 0 ;
		DMAConfig(SPI_RX);SPIRxDone = 0 ;
		GPIO_SetOutPut(GPIOA, GPIO_Pin12|GPIO_Pin13, GPIO_LOW);
		GPIO_SetOutPut(GPIOB, GPIO_Pin5, GPIO_LOW);
		GPIO_SetOutPut(GPIOC, GPIO_Pin4|GPIO_Pin7, GPIO_LOW);
		break;
	default:
		break;
	}
}