/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 16 $
* $Date: 16/06/21 7:44p $
* @brief
* Demonstrate how to set I2C to wake-up MCU from power-down mode.
* Needs to work with I2C_Wakeup_Master sample code.
* @note
* Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "NUC123.h"
#define PLLCON_SETTING CLK_PLLCON_72MHz_HXT
#define PLL_CLOCK 72000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
volatile uint32_t slave_buff_addr;
volatile uint8_t g_au8SlvData[256];
volatile uint8_t g_au8SlvRxData[3];
volatile uint8_t g_u8SlvPWRDNWK, g_u8SlvI2CWK;
volatile uint8_t g_u8DeviceAddr;
volatile uint8_t g_u8SlvDataLen;
typedef void (*I2C_FUNC)(uint32_t u32Status);
static I2C_FUNC s_I2C0HandlerFn = NULL;
/*---------------------------------------------------------------------------------------------------------*/
/* I2C0 IRQ Handler */
/*---------------------------------------------------------------------------------------------------------*/
void I2C0_IRQHandler(void)
{
uint32_t u32Status;
/* Check I2C Wake-up interrupt flag set or not */
if(I2C_GET_WAKEUP_FLAG(I2C0))
{
/* Clear I2C Wake-up interrupt flag */
I2C_CLEAR_WAKEUP_FLAG(I2C0);
g_u8SlvI2CWK = 1;
return;
}
u32Status = I2C_GET_STATUS(I2C0);
if(I2C_GET_TIMEOUT_FLAG(I2C0))
{
/* Clear I2C0 Timeout Flag */
I2C_ClearTimeoutFlag(I2C0);
}
else
{
if(s_I2C0HandlerFn != NULL)
s_I2C0HandlerFn(u32Status);
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* Power Wake-up IRQ Handler */
/*---------------------------------------------------------------------------------------------------------*/
void PWRWU_IRQHandler(void)
{
/* Check system power down mode wake-up interrupt flag */
if(((CLK->PWRCON) & CLK_PWRCON_PD_WU_STS_Msk) != 0)
{
/* Clear system power down wake-up interrupt flag */
CLK->PWRCON |= CLK_PWRCON_PD_WU_STS_Msk;
g_u8SlvPWRDNWK = 1;
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* I2C Slave Transmit/Receive Callback Function */
/*---------------------------------------------------------------------------------------------------------*/
void I2C_SlaveTRx(uint32_t u32Status)
{
if(u32Status == 0x60) /* Own SLA+W has been receive; ACK has been return */
{
g_u8SlvDataLen = 0;
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else if(u32Status == 0x80) /* Previously address with own SLA address
Data has been received; ACK has been returned*/
{
g_au8SlvRxData[g_u8SlvDataLen] = (unsigned char)I2C_GET_DATA(I2C0);
g_u8SlvDataLen++;
if(g_u8SlvDataLen == 2)
{
slave_buff_addr = (g_au8SlvRxData[0] << 8) + g_au8SlvRxData[1];
}
if(g_u8SlvDataLen == 3)
{
g_au8SlvData[slave_buff_addr] = g_au8SlvRxData[2];
g_u8SlvDataLen = 0;
}
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else if(u32Status == 0xA8) /* Own SLA+R has been receive; ACK has been return */
{
I2C_SET_DATA(I2C0, g_au8SlvData[slave_buff_addr]);
slave_buff_addr++;
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else if(u32Status == 0xC0) /* Data byte or last data in I2CDAT has been transmitted
Not ACK has been received */
{
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else if(u32Status == 0x88) /* Previously addressed with own SLA address; NOT ACK has
been returned */
{
g_u8SlvDataLen = 0;
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else if(u32Status == 0xA0) /* A STOP or repeated START has been received while still
addressed as Slave/Receiver*/
{
g_u8SlvDataLen = 0;
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
}
else
{
/* TO DO */
printf("Status 0x%x is NOT processed\n", u32Status);
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* System initial function */
/*---------------------------------------------------------------------------------------------------------*/
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable XT1_OUT (PF0) and XT1_IN (PF1) */
SYS->GPF_MFP |= SYS_GPF_MFP_PF0_XT1_OUT | SYS_GPF_MFP_PF1_XT1_IN;
/* Enable Internal RC 22.1184MHz clock */
CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);
/* Waiting for Internal RC clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);
/* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
/* Enable external XTAL 12MHz clock */
CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);
/* Waiting for external XTAL clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_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_UART_S_HXT, CLK_CLKDIV_UART(1));
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set GPB multi-function pins for UART0 RXD and TXD */
SYS->GPB_MFP = SYS_GPB_MFP_PB0_UART0_RXD | SYS_GPB_MFP_PB1_UART0_TXD;
/* Set GPF multi-function pins for I2C0 SDA and SCL */
SYS->GPF_MFP |= (SYS_GPF_MFP_PF2_I2C0_SDA | SYS_GPF_MFP_PF3_I2C0_SCL);
SYS->ALT_MFP1 &= ~(SYS_ALT_MFP1_PF2_Msk | SYS_ALT_MFP1_PF3_Msk);
SYS->ALT_MFP1 |= (SYS_ALT_MFP1_PF2_I2C0_SDA | SYS_ALT_MFP1_PF3_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("I2C0 clock %d Hz\n", I2C_GetBusClockFreq(I2C0));
/* Set I2C 4 Slave Addresses */
I2C_SetSlaveAddr(I2C0, 0, 0x15, 0); /* Slave Address : 0x15 */
I2C_SetSlaveAddr(I2C0, 1, 0x35, 0); /* Slave Address : 0x35 */
I2C_SetSlaveAddr(I2C0, 2, 0x55, 0); /* Slave Address : 0x55 */
I2C_SetSlaveAddr(I2C0, 3, 0x75, 0); /* Slave Address : 0x75 */
/* Set I2C 4 Slave Addresses Mask */
I2C_SetSlaveAddrMask(I2C0, 0, 0x01);
I2C_SetSlaveAddrMask(I2C0, 1, 0x04);
I2C_SetSlaveAddrMask(I2C0, 2, 0x01);
I2C_SetSlaveAddrMask(I2C0, 3, 0x04);
/* Enable I2C interrupt */
I2C_EnableInt(I2C0);
NVIC_EnableIRQ(I2C0_IRQn);
}
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);
}
/*---------------------------------------------------------------------------------------------------------*/
/* Main Function */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void)
{
uint32_t i;
/* Unlock protected registers */
SYS_UnlockReg();
/* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Init UART0 for printf */
UART0_Init();
/* Lock protected registers */
SYS_LockReg();;
/*
This sample code is I2C SLAVE mode and it simulates EEPROM function
*/
printf("\n");
printf("+-----------------------------------------------------------------------+\n");
printf("| NUC123 I2C Driver Sample Code (Slave) for wake-up & access Slave test |\n");
printf("| Needs to work with I2C_Wakeup_Master sample code. |\n");
printf("| I2C Master (I2C0) <---> I2C Slave (I2C0) |\n");
printf("| !! This sample code requires two borads to test !! |\n");
printf("+-----------------------------------------------------------------------+\n");
printf("Configure I2C0 as a slave.\n");
printf("The I/O connection for I2C0:\n");
printf("I2C0_SDA(PF.2), I2C0_SCL(PF.3)\n");
/* Init I2C0 */
I2C0_Init();
for(i = 0; i < 0x100; i++)
{
g_au8SlvData[i] = 0;
}
/* I2C function to Transmit/Receive data as slave */
s_I2C0HandlerFn = I2C_SlaveTRx;
/* Set I2C0 enter Not Address SLAVE mode */
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI_AA);
/* Unlock protected registers */
SYS_UnlockReg();
/* Enable power wake-up interrupt */
CLK->PWRCON |= CLK_PWRCON_PD_WU_INT_EN_Msk;
NVIC_EnableIRQ(PWRWU_IRQn);
/* Enable I2C wake-up */
I2C_EnableWakeup(I2C0);
printf("\n");
printf("Enter PD 0x%x 0x%x\n", I2C0->I2CON , I2C0->I2CSTATUS);
printf("\n");
printf("CHIP enter power down status.\n");
/* Waiting for UART printf finish*/
while(((UART0->FSR) & UART_FSR_TE_FLAG_Msk) == 0);
if(((I2C0->I2CON)&I2C_I2CON_SI_Msk) != 0)
{
I2C_SET_CONTROL_REG(I2C0, I2C_I2CON_SI);
}
/* Use WFI instruction to idle the CPU. NOTE:
If ICE is attached, system will wakeup immediately because ICE is a wakeup event. */
CLK_PowerDown();
while((g_u8SlvPWRDNWK & g_u8SlvI2CWK) == 0);
printf("Power-down Wake-up INT 0x%x\n", ((CLK->PWRCON) & CLK_PWRCON_PD_WU_STS_Msk));
printf("I2C0 WAKE INT 0x%x\n", I2C0->I2CWKUPSTS);
/* Disable power wake-up interrupt */
CLK->PWRCON &= ~CLK_PWRCON_PD_WU_INT_EN_Msk;
NVIC_DisableIRQ(PWRWU_IRQn);
/* Lock protected registers */
SYS_LockReg();
printf("\n");
printf("Slave wake-up from power down status.\n");
printf("\n");
printf("Slave Waiting for receiving data.\n");
while(1);
}
楼主
标题置顶
标题高亮
