測試一下，write跟讀的時侯，中間要插個delay.太快eeprom反應不及
/**************************************************************************//**
* @file main.c
* @version V3.00
* $Revision: 2 $
* $Date: 16/10/25 4:29p $
* @brief Show how to use I2C interface to access EEPROM.
* @note
* Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "NUC126.h"
#define PLLCTL_SETTING CLK_PLLCTL_72MHz_HXT
#define PLL_CLOCK 72000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable Internal RC 22.1184MHz clock */
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
/* Waiting for Internal RC clock ready */
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
/* Enable external XTAL 12MHz clock */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
/* Waiting for external XTAL clock ready */
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
/* Set core clock as PLL_CLOCK from PLL */
CLK_SetCoreClock(PLL_CLOCK);
/* Enable UART module clock */
CLK_EnableModuleClock(UART0_MODULE);
/* Enable I2C0 module clock */
CLK_EnableModuleClock(I2C0_MODULE);
/* Select UART module clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1));
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set PD multi-function pins for UART0 RXD and TXD */
SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD0MFP_Msk | SYS_GPD_MFPL_PD1MFP_Msk);
SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD0MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD);
/* Set PD multi-function pins for I2C0 SDA and SCL */
SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD4MFP_Msk | SYS_GPD_MFPL_PD5MFP_Msk);
SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD4MFP_I2C0_SDA | SYS_GPD_MFPL_PD5MFP_I2C0_SCL);
}
void UART0_Init()
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset IP */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 Baudrate */
UART_Open(UART0, 115200);
}
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));
}
volatile uint8_t g_u8DeviceAddr;
volatile uint32_t ret_code;
volatile uint16_t u16DataAddr;
/*---------------------------------------------------------------------------------------------------------*/
/* Main Function */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void)
{
/* Unlock protected registers */
SYS_UnlockReg();
/* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Lock protected registers */
SYS_LockReg();
/* Init UART0 for printf */
UART0_Init();
printf("I2C0_SDA(PD.4), I2C0_SCL(PD.5)\n");
/* Init I2C0 to access EEPROM */
I2C0_Init();
g_u8DeviceAddr = 0x50;
u16DataAddr = 0x0010;
I2C_WriteByteTwoRegs(I2C0, g_u8DeviceAddr, u16DataAddr, 0xaa) ;
CLK_SysTickDelay(20000);
ret_code=I2C_ReadByteTwoRegs(I2C0, g_u8DeviceAddr, u16DataAddr) ;
while(1);
}
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