程序例程如下：
/**
* COPYRIGHT 2011 Nuvoton Technology Corp.
******************************************************************************
* @file Smpl_DrvI2C.c
* @author NuMicro MCU Software Team
* @version V1.0.0
* @date 11/04/2011
* @brief This is a demonstration for transformation acorss TX/RX of I2C channel.
******************************************************************************
*/
#include <stdio.h>
#include "nano1xx.h"
#include "nano1xx_sys.h"
#include "nano1xx_i2c.h"
#include "nano1xx_gpio.h"
#include "nano1xx_uart.h"
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
uint8_t Device_Addr0;
uint8_t Tx_Data0[3];
uint8_t Rx_Data0;
uint8_t DataLen0;
uint8_t volatile EndFlag0 = 0;
uint8_t volatile TimeOutFlag0 = 0;
uint8_t volatile TimeOutFlag1 = 0;
uint8_t volatile MasterTxGo = 0;
uint8_t volatile MasterRxGo = 0;
uint8_t Addr1[3] = {0};
uint8_t DataLen1;
uint8_t Slave_Buff1[32] = {0};
uint16_t Slave_Buff_Addr1;
/*---------------------------------------------------------------------------------------------------------*/
/* Main Function */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main (void)
{
uint32_t i;
I2C0->INTSTS |= I2C_INTSTS_INTSTS;
printf("+---------------------------------------------------------------------+\n");
printf("| I2C Driver Sample Code |\n");
printf("+---------------------------------------------------------------------+\n");
printf(" I/O Configuration:\n");
printf(" GPA8 <--> GPA10\n");
printf(" GPA9 <--> GPA11\n");
printf("\n");
/* Set multi function pin for I2C0 */
GCR->PA_H_MFP = GCR->PA_H_MFP & ~(PA8_MFP_MASK|PA9_MFP_MASK) |
PA8_MFP_I2C0_SDA | PA9_MFP_I2C0_SCL;
/* Set multi function pin for I2C1 */
GCR->PA_H_MFP = GCR->PA_H_MFP & ~(PA10_MFP_MASK|PA11_MFP_MASK) |
PA10_MFP_I2C1_SDA | PA11_MFP_I2C1_SCL;
I2C_Init(I2C0); //开启I2C0时钟源
I2C_Init(I2C1); //开启I2C1时钟源
/* Open I2C0 and I2C1, and set clock = 100Kbps */
I2C_Open(I2C0, 100000); //设置时钟频率
I2C_Open(I2C1, 100000);
/* Get I2C0 clock */
printf("I2C0 clock %d Hz\n", I2C_GetClockFreq(I2C0)); //打印频率
/* Get I2C1 clock */
printf("I2C1 clock %d Hz\n", I2C_GetClockFreq(I2C1));
/* Set I2C0 slave addresses */
I2C_SetAddress(I2C0, 0, 0x15, 0);
//7位从机地址，并启用广播呼叫功能（选择I2C0，主从机选择，基地址，禁用广播呼叫功能）
I2C_SetAddress(I2C0, 1, 0x35, 0);
/* Set I2C1 slave addresses */
I2C_SetAddress(I2C1, 0, 0x16, 0);
I2C_SetAddress(I2C1, 1, 0x36, 0);
/// 从机设置
for (i = 0; i < 32; i++)
{
Slave_Buff1 = 0;
}
/* Set AA bit, I2C1 as slave (To simulate a 24LXX EEPROM) */ //AA=ACK（反馈）
I2C_Ctrl(I2C1, 1, 0, 1); //设置I2C控制位（选择I2C口，start，stop，ACK）
/* Enable I2C0 interrupt and set corresponding NVIC bit */
I2C_EnableInt(I2C0); //开启中断使能
/* Enable I2C1 interrupt and set corresponding NVIC bit */
I2C_EnableInt(I2C1);
I2C_SetTimeoutCounter(I2C0, 0, 0); //设置I2C的定时器（I2C0，比较值，clock_DIV）
I2C_SetTimeoutCounter(I2C1, 0, 0);
Device_Addr0 = 0x16; //设备基地址
Tx_Data0[0] = 0x00;
Tx_Data0[1] = 0x00;
for (i = 0; i < 1; i++)
{
Tx_Data0[2] = 0x10 + i;
DataLen0 = 0;
EndFlag0 = 0;
/// 主机设置
MasterTxGo = 1;
/* I2C0 as master sends START signal */
I2C_Ctrl(I2C0, 1, 0, 0); //设置I2C控制位（选择I2C口，start，stop，ACK）
/* Wait I2C0 Tx Finish */ //等待主机发送完成
while (EndFlag0 == 0 && TimeOutFlag0 != 1);
if(TimeOutFlag0)
goto fail;
EndFlag0 = 0;
MasterTxGo = 0;
MasterRxGo = 1;
DataLen0 = 0;
Device_Addr0 = 0x16;
I2C_Ctrl(I2C0, 1, 0, 0);
/* Wait I2C0 Rx Finish */
while (EndFlag0 == 0&& TimeOutFlag0 != 1);
if(TimeOutFlag0)
goto fail;
MasterRxGo = 0;
/* Compare data */
if (Rx_Data0 != Tx_Data0[2])
{
printf("I2C0 Byte Write/Read Failed, Data 0x%x\n", Rx_Data0);
return -1;
}
}
printf("I2C0(Master) <==> I2C1(Slave) Test OK\n");
fail:
/* Disable I2C0 interrupt and clear corresponding NVIC bit */
I2C_DisableInt(I2C0);
/* Disable I2C1 interrupt and clear corresponding NVIC bit */
I2C_DisableInt(I2C1);
/* Close I2C0 and I2C1 */
I2C_Close(I2C0);
I2C_Close(I2C1);
I2C_DeInit(I2C0);
I2C_DeInit(I2C1);
return 0;
}
#ifdef USE_ASSERT
/**
* @brief The function prints the source file name and line number where the assert_param() error
* occurs, and then stops in an infinite loop. User can add his own codes here if necessary.
* @param[in] file Source file name
* @param[in] line Line number
* @return None
*/
void assert_error(uint8_t * file, uint32_t line)
{
GCR->PB_L_MFP = (GCR->PB_L_MFP & ~0x77) | (PB1_MFP_UART0_TX | PB0_MFP_UART0_RX); /* Select multi-function pin for UART0 */
CLK->APBCLK |= CLK_APBCLK_UART0_EN; /* Enable UART0 clock */
CLK->CLKDIV0 &= ~CLK_CLKDIV0_UART_MASK;
CLK->CLKSEL1 = (CLK->CLKSEL1 & ~CLK_CLKSEL1_UART_MASK) | CLK_CLKSEL1_UART_HXT; /* Select 12 Mhz XTAL */
/* Set UART to 115200,n,8,1,none */
UART0->BAUD = 0x67; /* Baud Rate:115200 for 12MHz */
UART0->TLCTL = 0x03; /* Word len is 8 bits */
printf("[%s] line %d : wrong parameters.\r\n", file, line);
/* Infinite loop */
while(1) ;
}
#endif
/*** (C) COPYRIGHT 2011 Nuvoton Technology Corp. ***/
希望有人帮我看看为什么进入不了中断，谢谢·！！！！ |
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