/******************************************************************************
* [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. ***/
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