/*
 * Copyright (c) 2015, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 * All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include "pin_mux.h"
#include "clock_config.h"
#include "board.h"
#include "fsl_lpuart_edma.h"
#if defined(FSL_FEATURE_SOC_DMAMUX_COUNT) && FSL_FEATURE_SOC_DMAMUX_COUNT
#include "fsl_dmamux.h"
#endif
/*******************************************************************************
 * Definitions
 ******************************************************************************/
#define DEMO_LPUART                    LPUART3
#define DEMO_LPUART_CLK_FREQ           BOARD_DebugConsoleSrcFreq()

#define LPUART_TX_DMA_CHANNEL          0U
#define LPUART_RX_DMA_CHANNEL          1U
#define LPI2C_TRANSMIT_DMA_CHANNEL     2U
#define LPI2C_RECEIVE_DMA_CHANNEL      3U


#define LPUART_TX_DMA_REQUEST          kDmaRequestMuxLPUART3Tx
#define LPUART_RX_DMA_REQUEST          kDmaRequestMuxLPUART3Rx
#define EXAMPLE_LPUART_DMAMUX_BASEADDR DMAMUX
#define EXAMPLE_LPUART_DMA_BASEADDR    DMA0
#define ECHO_BUFFER_LENGTH 8

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/* LPUART user callback */
void LPUART_UserCallback(LPUART_Type *base, lpuart_edma_handle_t *handle, status_t status, void *userData);

/*******************************************************************************
 * Variables
 ******************************************************************************/

lpuart_edma_handle_t g_lpuartEdmaHandle;
edma_handle_t g_lpuartTxEdmaHandle;
edma_handle_t g_lpuartRxEdmaHandle;
AT_NONCACHEABLE_SECTION_INIT(uint8_t g_tipString[]) =
    "LPUART EDMA example\r\nSend back received data\r\nEcho every 8 characters\r\n";
AT_NONCACHEABLE_SECTION_INIT(uint8_t g_txBuffer[52]) = {0x23,00,00,00,0x28,00,00,00,0x01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,0x3B,0xF7,0x23,0x5D};
AT_NONCACHEABLE_SECTION_INIT(uint8_t g_rxBuffer[32]) = {0};
volatile bool rxBufferEmpty                                          = true;
volatile bool txBufferFull                                           = false;
volatile bool txOnGoing                                              = false;
volatile bool rxOnGoing                                              = false;

/*******************************************************************************
 * Code
 ******************************************************************************/
/* LPUART user callback */
void LPUART_UserCallback(LPUART_Type *base, lpuart_edma_handle_t *handle, status_t status, void *userData)
{
    userData = userData;

    if (kStatus_LPUART_TxIdle == status)
    {
        txBufferFull = false;
        txOnGoing    = false;
    }

    if (kStatus_LPUART_RxIdle == status)
    {
        rxBufferEmpty = false;
        rxOnGoing     = false;
    }
}

/*!
 * @brief Main function
 */
int main(void)
{
    lpuart_config_t lpuartConfig;
    lpuart_transfer_t xfer;
    lpuart_transfer_t sendXfer;
    lpuart_transfer_t receiveXfer;
    edma_config_t userConfig = {0};
    uint32_t  uiCnt = 0;


    BOARD_ConfigMPU();
    BOARD_InitBootPins();
    BOARD_InitBootClocks();

    /* Initialize the LPUART. */
    /*
     * lpuartConfig.baudRate_Bps = 115200U;
     * lpuartConfig.parityMode = kLPUART_ParityDisabled;
     * lpuartConfig.stopBitCount = kLPUART_OneStopBit;
     * lpuartConfig.txFifoWatermark = 0;
     * lpuartConfig.rxFifoWatermark = 0;
     * lpuartConfig.enableTx = false;
     * lpuartConfig.enableRx = false;
     */
    LPUART_GetDefaultConfig(&lpuartConfig);
    lpuartConfig.baudRate_Bps = BOARD_DEBUG_UART_BAUDRATE;
    lpuartConfig.enableTx     = true;
    lpuartConfig.enableRx     = true;

    LPUART_Init(DEMO_LPUART, &lpuartConfig, DEMO_LPUART_CLK_FREQ);

#if defined(FSL_FEATURE_SOC_DMAMUX_COUNT) && FSL_FEATURE_SOC_DMAMUX_COUNT
    /* Init DMAMUX */
    DMAMUX_Init(EXAMPLE_LPUART_DMAMUX_BASEADDR);
    /* Set channel for LPUART */
    DMAMUX_SetSource(EXAMPLE_LPUART_DMAMUX_BASEADDR, LPUART_TX_DMA_CHANNEL, LPUART_TX_DMA_REQUEST);
    DMAMUX_SetSource(EXAMPLE_LPUART_DMAMUX_BASEADDR, LPUART_RX_DMA_CHANNEL, LPUART_RX_DMA_REQUEST);
    DMAMUX_EnableChannel(EXAMPLE_LPUART_DMAMUX_BASEADDR, LPUART_TX_DMA_CHANNEL);
    DMAMUX_EnableChannel(EXAMPLE_LPUART_DMAMUX_BASEADDR, LPUART_RX_DMA_CHANNEL);
#endif
    /* Init the EDMA module */
    EDMA_GetDefaultConfig(&userConfig);
#if defined(BOARD_GetEDMAConfig)
    BOARD_GetEDMAConfig(userConfig);
#endif
    EDMA_Init(EXAMPLE_LPUART_DMA_BASEADDR, &userConfig);
    EDMA_CreateHandle(&g_lpuartTxEdmaHandle, EXAMPLE_LPUART_DMA_BASEADDR, LPUART_TX_DMA_CHANNEL);
    EDMA_CreateHandle(&g_lpuartRxEdmaHandle, EXAMPLE_LPUART_DMA_BASEADDR, LPUART_RX_DMA_CHANNEL);
#if defined(FSL_FEATURE_EDMA_HAS_CHANNEL_MUX) && FSL_FEATURE_EDMA_HAS_CHANNEL_MUX
    EDMA_SetChannelMux(EXAMPLE_LPUART_DMA_BASEADDR, LPUART_TX_DMA_CHANNEL, DEMO_LPUART_TX_EDMA_CHANNEL);
    EDMA_SetChannelMux(EXAMPLE_LPUART_DMA_BASEADDR, LPUART_RX_DMA_CHANNEL, DEMO_LPUART_RX_EDMA_CHANNEL);
#endif

    /* Create LPUART DMA handle. */
    LPUART_TransferCreateHandleEDMA(DEMO_LPUART, &g_lpuartEdmaHandle, LPUART_UserCallback, NULL, &g_lpuartTxEdmaHandle,
                                    &g_lpuartRxEdmaHandle);

    /* Start to echo. */
     char buff[100];
//    LPUART_SendEDMA(DEMO_LPUART, &g_lpuartEdmaHandle, &sendXfer);
//
//    /* Wait send finished */
//    while (txOnGoing)
//    {
//    }

    /* Start to echo. */
    sendXfer.data        = g_txBuffer;
    sendXfer.dataSize    = 52;
    receiveXfer.data     = g_rxBuffer;
    receiveXfer.dataSize = 32;


    while (1)
    {
//        /* If RX is idle and g_rxBuffer is empty, start to read data to g_rxBuffer. */
//         if ((!rxOnGoing) && (rxBufferEmpty))
//         {
//			memset(buff,0x00,100);
//			memset(g_rxBuffer,0x00,32);
//             rxOnGoing = true;
//             LPUART_ReceiveEDMA(DEMO_LPUART, &g_lpuartEdmaHandle, &receiveXfer);
//
//         }
    //	sendXfer.data[0] = uiCnt++;
		if ((!txOnGoing) && (!txBufferFull))
		{
			txOnGoing = true;
			LPUART_SendEDMA(DEMO_LPUART, &g_lpuartEdmaHandle, &sendXfer);
		    /* Wait send finished */
		    while (txOnGoing)
		    {
		    }
		}



    }
}