AVR read and write IO port right method (borrowed from ATmel)

Publisher:清新风华Latest update time:2017-11-24 Source: eefocusKeywords:AVR Reading articles on mobile phones Scan QR code
Read articles on your mobile phone anytime, anywhere

//头文件
#ifndef __always_inline__
#define __always_inline__  _Pragma("inline=forced")inline
#endif

#define AVR_GPIO_ASSIGN(name, port, bit) \
__always_inline__ static void   GPIO_##name##_Set(void)            {PORT##port |= (1 << bit);}\
__always_inline__ static void   GPIO_##name##_Clr(void)            {PORT##port &= ~(1 << bit);}\
__always_inline__ static void   GPIO_##name##_Toggle(void)         {PORT##port ^= (1 << bit);}\
__always_inline__ static uint8  GPIO_##name##_Read(void)           {return (PIN##port & (1 << bit)) !=0;}\
__always_inline__ static uint8  GPIO_##name##_DdrRead(void)        {return (DDR##port & (1 << bit)) !=0;}\
__always_inline__ static void   GPIO_##name##_MakeOut(uint8 x)     {(x)?(PORT##port |= (1 << bit)):(PORT##port &= ~(1 << bit)); DDR##port |= (1 << bit);}\
__always_inline__ static void   GPIO_##name##_MakeIn(uint8 x)      {DDR##port &= ~(1 << bit); (x)?(PORT##port |= (1 << bit)):(PORT##port &= ~(1 << bit));}\
__always_inline__ static void   GPIO_##name##_MakePullup(void)     {GPIO_##name##_MakeIn(1);}


AVR_GPIO_ASSIGN(LED_1,B,0);    //LED_1-------PORTB0
AVR_GPIO_ASSIGN(LED_2,B,1);    //LED_2-------PORTB1
AVR_GPIO_ASSIGN(KEY,B,2);      //KEY---------PORTB2

//C文件
volatile uint8 key;
int main()
{
    GPIO_LED_1_MakeOut(0);    //LED_1设为输出,初始输出低
    GPIO_LED_2_MakeOut(0);    //LED_2设为输出,初始输出低
    GPIO_KEY_MakeIn(1);       //KEY设为输入,初始上拉
    
    GPIO_LED_1_Set();         //LED_1输出高
    GPIO_LED_1_Clr();         //LED_1输出低
    
    GPIO_LED_2_Set();         //LED_2输出高
    GPIO_LED_2_Clr();         //LED_2输出低
    
    key=GPIO_KEY_Read();      //读取KEY

    while(1);

}

Keywords:AVR Reference address:AVR read and write IO port right method (borrowed from ATmel)

Previous article:Using the IIC in the AVR chip to implement the continuous writing (page writing) and continuous reading procedures of AT24C256
Next article:AVR MCU IO usage precautions and structure guide

Latest Microcontroller Articles
  • Download from the Internet--ARM Getting Started Notes
    A brief introduction: From today on, the ARM notebook of the rookie is open, and it can be regarded as a place to store these notes. Why publish it? Maybe you are interested in it. In fact, the reason for these notes is ...
  • Learn ARM development(22)
    Turning off and on interrupts Interrupts are an efficient dialogue mechanism, but sometimes you don't want to interrupt the program while it is running. For example, when you are printing something, the program suddenly interrupts and another ...
  • Learn ARM development(21)
    First, declare the task pointer, because it will be used later. Task pointer volatile TASK_TCB* volatile g_pCurrentTask = NULL;volatile TASK_TCB* vol ...
  • Learn ARM development(20)
    With the previous Tick interrupt, the basic task switching conditions are ready. However, this "easterly" is also difficult to understand. Only through continuous practice can we understand it. ...
  • Learn ARM development(19)
    After many days of hard work, I finally got the interrupt working. But in order to allow RTOS to use timer interrupts, what kind of interrupts can be implemented in S3C44B0? There are two methods in S3C44B0. ...
  • Learn ARM development(14)
  • Learn ARM development(15)
  • Learn ARM development(16)
  • Learn ARM development(17)
Change More Related Popular Components

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews


Room 1530, 15th Floor, Building B, No.18 Zhongguancun Street, Haidian District, Beijing, Postal Code: 100190 China Telephone: 008610 8235 0740

Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号