[DemoCode下载] M031使用库函数读写EEPROM操作

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

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

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

 * $Revision: 5 $

 * $Date: 18/07/09 7:01p $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Show how to use I2C interface to access EEPROM.

 *

 * SPDX-License-Identifier: Apache-2.0

 * Copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.

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

#include <stdio.h>

#include "NuMicro.h"



#define I2C_EEPROM_ADDRESS  0x50



void SYS_Init(void)

{

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

    /* Init System Clock                                                                                       */

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



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Enable HIRC clock (Internal RC 48MHz) */

    CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);



    /* Wait for HIRC clock ready */

    CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);



    /* Select HCLK clock source as HIRC and HCLK source divider as 1 */

    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));



    /* Enable UART0 clock */

    CLK_EnableModuleClock(UART0_MODULE);



    /* Switch UART0 clock source to HIRC */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));



    /* Enable I2C0 clock */

    CLK_EnableModuleClock(I2C0_MODULE);



    /* Update System Core Clock */

    /* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and cyclesPerUs automatically. */

    SystemCoreClockUpdate();



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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set PB multi-function pins for UART0 RXD=PB.12 and TXD=PB.13 */

    SYS->GPB_MFPH = (SYS->GPB_MFPH & ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk)) |

                    (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);



    /* Set I2C0 multi-function pins */

    SYS->GPC_MFPL = (SYS->GPC_MFPL & ~(SYS_GPC_MFPL_PC0MFP_Msk | SYS_GPC_MFPL_PC1MFP_Msk)) |

                    (SYS_GPC_MFPL_PC0MFP_I2C0_SDA | SYS_GPC_MFPL_PC1MFP_I2C0_SCL);



    /* Lock protected registers */

    SYS_LockReg();

}



void I2C0_Close(void)

{

    /* Disable I2C0 interrupt and clear corresponding NVIC bit */

    I2C_DisableInt(I2C0);

    NVIC_DisableIRQ(I2C0_IRQn);



    /* Disable I2C0 and close I2C0 clock */

    I2C_Close(I2C0);

    CLK_DisableModuleClock(I2C0_MODULE);



}



void I2C0_Init(void)

{

    /* Open I2C module and set bus clock */

    I2C_Open(I2C0, 100000);



    /* Get I2C0 Bus Clock */

    printf("I2C clock %d Hz\n", I2C_GetBusClockFreq(I2C0));

}



int main()

{

    uint32_t i;

    uint8_t txbuf[10] = {0}, rDataBuf[10] = {0};



    SYS_Init();



    /* Init UART0 to 115200-8n1 for print message */

    UART_Open(UART0, 115200);



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

    printf("|    Level1 I2C EEPROM Sample Code    |\n");

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

    printf("\n");



    /* Init I2C0 to access EEPROM */

    I2C0_Init();



    /* Prepare data for transmission */

    printf("Write Data: ");

    for (i = 0; i < 10; i++)

    {

        txbuf[i] = (uint8_t) i + 3;

        printf("  %d",txbuf[i]);

    }

    printf("\n");



    /* Write 10 bytes data to EEPROM */

    while(I2C_WriteMultiBytesTwoRegs(I2C0, I2C_EEPROM_ADDRESS, 0x0000, txbuf, 10) < 10);

    printf("Multi bytes Write access Pass.....\n\n");



    /* Use Multi Bytes Read from EEPROM (Two Registers) */

    while(I2C_ReadMultiBytesTwoRegs(I2C0, I2C_EEPROM_ADDRESS, 0x0000, rDataBuf, 10) < 10);



    printf("Read Data:  ");

    for(i = 0; i < 10; i++)

        printf("  %d",rDataBuf[i]);

    printf("\n");

    printf("Multi bytes Read access Pass.....\n\n");



    /* Compare TX data and RX data */

    for(i = 0; i < 10; i++)

    {

        if(txbuf[i] != rDataBuf[i])

        {

            printf("Data compare fail... R[%d] Data: 0x%X\n", i, rDataBuf[i]);

            while(1);

        }

    }

    printf("Data compare done... [PASS]\n");



    while(1);

}



/*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/