[DemoCode下载] Mini58采用FIFO来发送接收SPI

/**************************************************************************//**

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V1.00

 * $Revision: 1 $

 * $Date: 15/11/05 11:31a $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Mini58 SPI Driver Sample Code

 *           This is a SPI master mode demo and need to be tested with a slave device.

 *

 * @note

 * Copyright (C) 2015 Nuvoton Technology Corp. All rights reserved.

 *

 ******************************************************************************/

#include <stdio.h>

#include "Mini58Series.h"



#define TEST_COUNT 16



uint32_t g_au32SourceData[TEST_COUNT];

uint32_t g_au32DestinationData[TEST_COUNT];

volatile uint32_t g_u32TxDataCount = 0;

volatile uint32_t g_u32RxDataCount = 0;



void SYS_Init(void)

{

    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Unlock protected registers */

    SYS_UnlockReg();



    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set P5 multi-function pins for XTAL1 and XTAL2 */

    SYS->P5_MFP &= ~(SYS_MFP_P50_Msk | SYS_MFP_P51_Msk);

    SYS->P5_MFP |= (SYS_MFP_P50_XT1_IN | SYS_MFP_P51_XT1_OUT);



    /* Enable external 12MHz XTAL, HIRC */

    CLK->PWRCTL |= CLK_PWRCTL_XTL12M | CLK_PWRCTL_HIRCEN_Msk;



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_STATUS_XTLSTB_Msk | CLK_STATUS_HIRCSTB_Msk);



    /* Switch HCLK clock source to XTL */

    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_XTAL,CLK_CLKDIV_HCLK(1));



    /* STCLK to XTL STCLK to XTL */

    CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_XTAL);



    /* Enable IP clock */

    CLK_EnableModuleClock(UART0_MODULE);

    CLK_EnableModuleClock(SPI0_MODULE);



    /* Select IP clock source */

    CLK_SetModuleClock(UART0_MODULE,CLK_CLKSEL1_UARTSEL_XTAL,CLK_CLKDIV_UART(1));

    CLK_SetModuleClock(SPI0_MODULE,CLK_CLKSEL1_SPISEL_XTAL,0);



    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set P1 multi-function pins for UART RXD and TXD */

    SYS->P1_MFP &= ~(SYS_MFP_P12_Msk | SYS_MFP_P13_Msk);

    SYS->P1_MFP |= (SYS_MFP_P12_UART0_RXD | SYS_MFP_P13_UART0_TXD);



    /* Setup SPI multi-function pin */

    SYS->P0_MFP |= SYS_MFP_P04_SPI0_SS | SYS_MFP_P05_SPI0_MOSI | SYS_MFP_P06_SPI0_MISO | SYS_MFP_P07_SPI0_CLK;



    /* Lock protected registers */

    SYS_LockReg();



    /* Update System Core Clock */

    SystemCoreClockUpdate();

}



void UART_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init UART                                                                                               */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Reset IP */

    SYS_ResetModule(UART0_RST);



    /* Configure UART and set UART Baudrate */

    UART_Open(UART0, 115200);

}



void SPI_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init SPI                                                                                                */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Configure as a master, clock idle low, falling clock edge Tx, rising edge Rx and 32-bit transaction */

    /* Set IP clock divider. SPI clock rate = 1MHz */

    SPI_Open(SPI, SPI_MASTER, SPI_MODE_0, 32, 1000000);



    /* Enable the automatic hardware slave select function. Select the SS pin and configure as low-active. */

    SPI_EnableAutoSS(SPI, SPI_SS, SPI_SS_ACTIVE_LOW);

}



void SPI_IRQHandler(void)

{

    uint32_t temp;



    while((SPI_GET_RX_FIFO_EMPTY_FLAG(SPI0))==0)

    {

        temp = SPI_READ_RX(SPI0);

        g_au32DestinationData[g_u32RxDataCount++] = temp;

    }



    while( (SPI_GET_TX_FIFO_FULL_FLAG(SPI0)==0) && (g_u32TxDataCount<TEST_COUNT) )

    {

        SPI_WRITE_TX(SPI0, g_au32SourceData[g_u32TxDataCount++]);

    }



    if(g_u32TxDataCount>=TEST_COUNT)

        SPI_DisableInt(SPI0, SPI_FIFO_TX_INTEN_MASK); /* Disable TX FIFO threshold interrupt */

}



int main(void)

{

    uint32_t u32DataCount;



    /* Init System, IP clock and multi-function I/O */

    SYS_Init();



    /* Init UART for printf */

    UART_Init();



    /* Init SPI */

    SPI_Init();



    printf("\n\n");

    printf("+----------------------------------------------------------------------+\n");

    printf("|                       SPI Driver Sample Code                         |\n");

    printf("+----------------------------------------------------------------------+\n");

    printf("\n");



    printf("Configure SPI as a master.\n");

    printf("SPI clock rate: %d Hz\n", SPI_GetBusClock(SPI0));



    for(u32DataCount=0; u32DataCount<TEST_COUNT; u32DataCount++)

    {

        g_au32SourceData[u32DataCount] = 0x00550000 + u32DataCount;

        g_au32DestinationData[u32DataCount] = 0;

    }



    printf("Before starting the data transfer, make sure the slave device is ready. Press any key to start the transfer.\n");

    getchar();

    printf("\n");



    SPI_EnableInt(SPI0, SPI_FIFO_TX_INTEN_MASK | SPI_FIFO_RX_INTEN_MASK);

    NVIC_EnableIRQ(SPI_IRQn);

    SPI_EnableFIFO(SPI0, 2, 1);



    /* Wait for transfer done */

    while(g_u32RxDataCount<TEST_COUNT);



    printf("Received data:\n");

    for(u32DataCount=0; u32DataCount<TEST_COUNT; u32DataCount++)

    {

        printf("%d:\t0x%08X\n", u32DataCount, g_au32DestinationData[u32DataCount]);

    }



    printf("The data transfer was done.\n");



    while(1);

}