求SPI收、发一个字节程序

发表于 2016-6-4 11:41

如题

发表于 2016-6-4 16:51

什么芯片型号都不写，谁知道你要什么

发表于 2016-6-5 20:24

哪个芯片的？

发表于 2016-6-5 20:25

spi协议及工作原理分析.pdf (410.67 KB, 下载次数: 22)

发表于 2016-6-5 20:26

这玩意儿还分主机模式和从机模式，真是不知道咋给你弄。

发表于 2016-6-5 20:27

http://www.nuvoton.com/resource- ... CMSIS_V3.00.002.zip
看看这个里面的例程是不是你要的。

发表于 2016-6-6 21:38

没说哪个单片机啊。

发表于 2016-6-6 21:39

复制

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

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

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

 * $Revision: 2 $

 * $Date: 15/10/12 8:13p $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Demonstrate how to communicate with an off-chip SPI slave device.

 *           This sample code needs to work with SPI_SlaveMode.

 *

 * @note

 * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.

 *

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

#include <stdio.h>

#include "Mini51Series.h"



#define TEST_COUNT 16



uint32_t g_au32SourceData[TEST_COUNT];

uint32_t g_au32DestinationData[TEST_COUNT];

volatile uint32_t g_u32TxDataCount;

volatile uint32_t g_u32RxDataCount;

volatile uint8_t g_u8Done;



void SYS_Init(void)

{

    /* 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_XTAL1 | SYS_MFP_P51_XTAL2);



    /* Enable external 12MHz XTAL, internal 22.1184MHz */

    CLK_EnableXtalRC(CLK_PWRCON_HXT|CLK_PWRCON_HIRC_EN_Msk);



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL_STB_Msk | CLK_CLKSTATUS_IRC22M_STB_Msk);



    /* Switch HCLK clock source to XTL */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_XTAL,CLK_CLKDIV_HCLK(1));



    /* STCLK to XTL STCLK to XTL */

    CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLK_S_XTAL);



    /* Enable IP clock */

    CLK_EnableModuleClock(UART_MODULE);

    CLK_EnableModuleClock(SPI_MODULE);



    /* Select IP clock source */

    CLK_SetModuleClock(UART_MODULE,CLK_CLKSEL1_UART_S_XTAL,CLK_CLKDIV_UART(1));



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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set P0 multi-function pins for UART RXD and TXD */

    SYS->P0_MFP &= ~(SYS_MFP_P01_Msk | SYS_MFP_P00_Msk);

    SYS->P0_MFP |= (SYS_MFP_P01_RXD | SYS_MFP_P00_TXD);



    /* Setup SPI multi-function pin */

    SYS->P0_MFP |= SYS_MFP_P04_SPISS | SYS_MFP_P05_MOSI | SYS_MFP_P06_MISO | SYS_MFP_P07_SPICLK;



    /* Lock protected registers */

    SYS_LockReg();



    /* Update System Core Clock */

    SystemCoreClockUpdate();

}



void UART_Init(void)

{

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

    /* Init UART                                                                                               */

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

    /* Reset IP */

    SYS_ResetModule(UART_RST);



    /* Configure UART and set UART Baudrate */

    UART_Open(UART, 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)

{

    SPI_CLR_UNIT_TRANS_INT_FLAG(SPI0);

    g_u8Done = 1;

}



int main(void)

{

    uint32_t u32DataCount, i;



    /* 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_IE_MASK);

    NVIC_EnableIRQ(SPI_IRQn);



    for(i=0; i<TEST_COUNT; i++) {

        g_u8Done = 0;

        SPI_WRITE_TX(SPI0, g_au32SourceData[i]);

        SPI_TRIGGER(SPI0);



        while(!g_u8Done);

        g_au32DestinationData[i] = SPI_READ_RX(SPI0);

    }



    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);

}

发表于 2016-6-6 21:44

复制

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

 * @file     main.c

 * @version  V1.00

 * $Revision: 3 $

 * $Date: 15/10/13 2:15p $

 * @brief    Demonstrate how to communicate with an off-chip SPI master device.

 *           This sample code needs to work with SPI_MasterMode.

 *

 * @note

 * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.

 *

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

#include <stdio.h>

#include "Mini51Series.h"



#define TEST_COUNT 16



uint32_t g_au32SourceData[TEST_COUNT];

uint32_t g_au32DestinationData[TEST_COUNT];

volatile uint32_t g_u32TxDataCount;

volatile uint32_t g_u32RxDataCount;

volatile uint8_t g_u8Done;



void SYS_Init(void)

{

    /* 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_XTAL1 | SYS_MFP_P51_XTAL2);



    /* Enable external 12MHz XTAL, internal 22.1184MHz */

    CLK_EnableXtalRC(CLK_PWRCON_HXT|CLK_PWRCON_HIRC_EN_Msk);



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL_STB_Msk | CLK_CLKSTATUS_IRC22M_STB_Msk);



    /* Switch HCLK clock source to XTL */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_XTAL,CLK_CLKDIV_HCLK(1));



    /* STCLK to XTL STCLK to XTL */

    CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLK_S_XTAL);



    /* Enable IP clock */

    CLK_EnableModuleClock(UART_MODULE);

    CLK_EnableModuleClock(SPI_MODULE);



    /* Select IP clock source */

    CLK_SetModuleClock(UART_MODULE,CLK_CLKSEL1_UART_S_XTAL,CLK_CLKDIV_UART(1));



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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set P0 multi-function pins for UART RXD and TXD */

    SYS->P0_MFP &= ~(SYS_MFP_P01_Msk | SYS_MFP_P00_Msk);

    SYS->P0_MFP |= (SYS_MFP_P01_RXD | SYS_MFP_P00_TXD);



    /* Setup SPI multi-function pin */

    SYS->P0_MFP |= SYS_MFP_P04_SPISS | SYS_MFP_P05_MOSI | SYS_MFP_P06_MISO | SYS_MFP_P07_SPICLK;



    /* Lock protected registers */

    SYS_LockReg();



    /* Update System Core Clock */

    SystemCoreClockUpdate();

}



void UART_Init(void)

{

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

    /* Init UART                                                                                               */

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

    /* Reset IP */

    SYS_ResetModule(UART_RST);



    /* Configure UART and set UART Baudrate */

    UART_Open(UART, 115200);

}



void SPI_Init(void)

{

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

    /* Init SPI                                                                                                */

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

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

    /* Set IP clock divider. SPI clock rate = 2MHz */

    SPI_Open(SPI, SPI_SLAVE, SPI_MODE_0, 32, 2000000);



    /* 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)

{

    SPI_CLR_UNIT_TRANS_INT_FLAG(SPI0);

    g_u8Done = 1;

}



int main(void)

{

    uint32_t u32DataCount, i;



    /* 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 slave.\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;

    }



    SPI_EnableInt(SPI0, SPI_IE_MASK);

    NVIC_EnableIRQ(SPI_IRQn);



    for(i=0; i<TEST_COUNT; i++) {

        g_u8Done = 0;

        SPI_WRITE_TX(SPI0, g_au32SourceData[i]);

        SPI_TRIGGER(SPI0);



        while(!g_u8Done);

        g_au32DestinationData[i] = SPI_READ_RX(SPI0);

    }



    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);

}

发表于 2016-6-7 16:49

没有给出任何信息，不知道你要玩什么。

发表于 2016-6-7 17:38

楼主忽悠人呢

发表于 2016-6-8 09:48

SPI的东西太多了，我用过MAX7219

发表于 2016-6-8 11:21

楼主好懒

发表于 2016-6-8 21:46

楼主SPI搞的哪个？用神马呢

[技术问答] 求SPI收、发一个字节程序

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