左右分不清

2016年9月20日星期二

[C#] 網路程式練習

C# TCP 客戶端 2 種 (最小精簡) 寫法：
https://lolikitty.pixnet.net/blog/post/112329777

Get Local IP Address in C#

https://www.delftstack.com/howto/csharp/get-local-ip-address-in-csharp/

書本上操寫的範例:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Net;

namespace ConsoleApplication_Internet_1
{
class Program
{
static void Main(string[] args)
{
//create IP address
IPAddress ipAddr = IPAddress.Parse("210.59.154.30");
Console.WriteLine("ipAddr=" + ipAddr);

//create IP endpoint
IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 80);
Console.WriteLine("ipEndPoint" + ipEndPoint);

// IP Endpoint 序列化為 SocketAddress
SocketAddress socketAddr = ipEndPoint.Serialize();
Console.WriteLine("socketAddr=" + socketAddr);

Console.ReadKey();
}
}

}

執行結果:

繼續 key.....

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Net;
using System.Net.Sockets;

namespace ConsoleApplication_Internet_1
{
class Program
{
static void Main(string[] args)
{
//create IP address
IPAddress ipAddr = IPAddress.Parse("210.59.154.30");
Console.WriteLine("ipAddr=" + ipAddr);

//create IP endpoint
IPEndPoint ipEndPoint = new IPEndPoint(ipAddr, 80);
Console.WriteLine("ipEndPoint" + ipEndPoint);

// IP Endpoint 序列化為 SocketAddress
SocketAddress socketAddr = ipEndPoint.Serialize();
Console.WriteLine("socketAddr = " + socketAddr);

//透過 DNS 找尋IP位址相對應之主機名稱
IPHostEntry remoteHostEntry = Dns.GetHostEntry(ipAddr);
Console.WriteLine("host of ip:" + ipAddr + "is" + remoteHostEntry.HostName);

//由於主機有可能有一個以上的 Alias
//因此程式中以迴圈方式判斷 Alias
string[] aliasList = remoteHostEntry.Aliases;
for(int i=0;i<=aliasList.Length-1;i++)
{
Console.WriteLine("Alias " + i + " : " + aliasList[i]);
}

//由於主機有可能有一個以上的IP address
//因此主程式中以迴圈方式判斷 AddressList
IPAddress[] addrList = remoteHostEntry.AddressList;
for(int i=0;i<addrList.Length-1;i++)
{
Console.WriteLine("Address " + i + " : " + addrList[i]);
}

Console.ReadKey();
}
}

}

2016年9月14日星期三

[Raspberry] 在Raspberry Pi 2 使用SPI(一)

先 Enable SPI Kernel Module

ls /dev 會看到有 spidev0.0 及 spidev0.1

程式::

#include <cstdlib>

#include <stdio.h>

#include <fcntl.h>

#include <sys/ioctl.h>

#include <linux/spi/spidev.h>

#include <unistd.h>

#include <string.h>

using namespace std;

int spi_cs0_fd;

unsigned char spi_mode;

unsigned char spi_bitsPerWord;

unsigned int spi_speed;

int spiOpenPort()

{

int *spi_cs_fd;

int status_value=-1;

spi_mode=SPI_MODE_0;

spi_bitsPerWord=8;

spi_speed=1000000;

spi_cs_fd=&spi_cs0_fd;

*spi_cs_fd=open("/dev/spidev0.0",O_RDWR);

if(*spi_cs_fd<0)

{

printf("Open /dev/spidev0.0 failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_WR_MODE,&spi_mode);

if(status_value<0)

{

printf("W spi_mode failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_RD_MODE,&spi_mode);

if(status_value<0)

{

printf("RD spi_mode failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_WR_BITS_PER_WORD,&spi_bitsPerWord);

if(status_value<0)

{

printf("WR sp_bitsPerWord failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_RD_BITS_PER_WORD,&spi_bitsPerWord);

if(status_value<0)

{

printf("RD sp_bitsPerWord failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_WR_MAX_SPEED_HZ,&spi_speed);

if(status_value<0)

{

printf("WR spi_spped failed\r\n");

exit(1);

}

status_value=ioctl(*spi_cs_fd,SPI_IOC_RD_MAX_SPEED_HZ,&spi_speed);

if(status_value<0)

{

printf("RD spi_spped failed\r\n");

exit(1);

}

return(status_value);

}

int SpiWriteAndRead(unsigned char *data,int length)

{

struct spi_ioc_transfer spi[length];

int i=0;

int retVal =-1;

int *spi_cs_fd;

spi_cs_fd=&spi_cs0_fd;

for(i=0;i<length;i++)

{

memset(&spi[i],0,sizeof(spi[i]));

spi[i].tx_buf=(unsigned long)(data+i);

spi[i].rx_buf=(unsigned long)(data+i);

spi[i].len=sizeof(*(data+i));

spi[i].delay_usecs=0;

spi[i].speed_hz=spi_speed;

spi[i].bits_per_word=spi_bitsPerWord;

spi[i].cs_change=0;

}

retVal=ioctl(*spi_cs_fd,SPI_IOC_MESSAGE(length),&spi);

if(retVal<0)

{

printf("tran error \n\r");

exit(1);

}

return retVal;

}

int main(int argc, char** argv) {

unsigned char buffer[100];

for(int j=0;j<100;j++)buffer[j]=0x55;

if(spiOpenPort()<0)

{

return -1;

}

SpiWriteAndRead(buffer,100);

close(spi_cs0_fd);

return 0;

}

參考資料:

Using the SPI Interface

http://www.raspberry-projects.com/pi/programming-in-c/spi/using-the-spi-interface

C library for Broadcom BCM 2835 as used in Raspberry Pi

http://www.airspayce.com/mikem/bcm2835/

Interfacing an SPI ADC(MCP3008) chip to Raspberry Pi using C++(spidev)

http://www.hertaville.com/interfacing-an-spi-adc-mcp3008-chip-to-the-raspberry-pi-using-c.html

2016年9月13日星期二

[Raspberry] 在Raspberry Pi 2 使用SPI

在 C library for Broadcom BCM 2835 as used in Raspberry Pi 提及:

in order for bcm2835 library SPI to work, you may need to disable the SPI kernel module using:

sudo raspi-config

under Advanced Options - enable Device Tree

under Advanced Options - disable SPI

Reboot.

所以我就跟著做了…..

程式:

#include <cstdlib>

#include <bcm2835.h>

#include <unistd.h>

#include <stdio.h>

using namespace std;

int main(int argc, char** argv) {

bcm2835_init();

//setup spi pins

if(bcm2835_spi_begin()==0)

{

printf("init failed \r\n");

return -1;

}

//set CS pins polarity to low

bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0,0);

bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS1,0);

//set clock speed

bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32768);

//set SPI data mode

bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);

//Set with CS pin to use for next transfers

bcm2835_spi_chipSelect(BCM2835_SPI_CS0);

//transfer byte

char buf[100];

for(int j=0;j<100;j++)

{

buf[j]=0x55;

}

for(int j=0;j<10;j++)

{

bcm2835_spi_transfern(&buf[0],100);

bcm2835_delay(1000);

}

//return spi pins to default input state

bcm2835_spi_end();

return 0;

}

從示波器上,發現只有j=0才會有CLK,其他時間CLK都不見(是否是因為沒接裝置沒有正常回應…)...不知勒

2016年9月12日星期一

[Raspberry] 在Raspberry Pi 2 使用GPIO(三)

sudo –i charge to root user -->這樣就可root操作了嗎?

下載BCM2835套件,解壓縮後,進入資料夾

./configure -->設定連結

make

sudo make check -->編譯前檢查

sudo make install -->編譯並進行安裝

程式:

#include <cstdlib>

#include <stdio.h>

#include <unistd.h>

#include <bcm2835.h>

#define PIN RPI_BPLUS_GPIO_J8_08

using namespace std;

int main(int argc, char** argv) {

if(!bcm2835_init())

{

printf("err\r\n");

}

bcm2835_gpio_fsel(PIN,BCM2835_GPIO_FSEL_OUTP);

for(int i=1;i<10;i++)

{

bcm2835_gpio_write(PIN,HIGH);

sleep(1);

bcm2835_gpio_write(PIN,LOW);

sleep(1);

}

return 0;

}

當編譯時,出現許多錯誤訊息

Undefined reference to bcm2835_init

Undefined reference to bcm2835_gpio_fsel ….

在NetBeans 視窗中,

選 Run -->Set Project Configuration -->Customize

在左邊選 Linker,右邊的 Libraries 點選加入(會出現 Debug-Libraries)

在右邊點選 Add Option 鈕(出現 Select Option)

選 checkbox Other Option ,輸入 “–lbcm2835”

跑程式,成功了!!

參考資料:

讓你的Raspberry Pi 透過 GPIO 閃爍 LED燈

http://coldnew.github.io/blog/2013/06-27_1aced/

Raspberry Pi –控制內建LED燈 PWR LED 和 ACT LED

http://english0815.blogspot.tw/2016/05/raspberry-pi-led-pwr-led-act-led.html

Linux GPIO Driver Guide

http://shyuanliang.blogspot.tw/2012/08/linux-gpio-driver-guide.html

树莓派：mmap 点亮 led 灯 example，pi2 model B 直接物理地址映射

http://blog.csdn.net/gw569453350game/article/details/49520811

RPi GPIO Code Samples

http://elinux.org/RPi_GPIO_Code_Samples

[How To Raspberry Pi] 使用C語言控制GPIO (安裝BCM2835套件)

http://rhrwirmemhf.blogspot.tw/2015/02/raspberry-pi-cgpio.html

Adding A Library To A NetBeans Project

http://www.raspberry-projects.com/pi/programming-in-c/compilers-and-ides/netbeans-windows/adding-libraries

[Raspberry] 在Raspberry Pi 2 使用GPIO(二)

程式:

#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

using namespace std;

int pin=14;

void CloseExport()
{
int fd;
ssize_t byte_write;
char buf[3];

fd=open("/sys/class/gpio/unexport",O_WRONLY);

if(fd==-1) printf("Failed to open unexport \r\n");

byte_write=snprintf(buf,3,"%d",pin);

if(write(fd,buf,byte_write)<0) printf("Failed 1\r\n");

close(fd);
}

int main(int argc, char** argv) {

ssize_t byte_write0;

int fd1;

char buf0[3];
fd1=open("/sys/class/gpio/export",O_WRONLY);

if(fd1==-1) { printf("failed to open export for writing\r\n");return -1;}

byte_write0=snprintf(buf0,3,"%d",pin);
if(write(fd1,buf0,byte_write0)<0)
{
close(fd1);

printf("fail 0\r\n");

CloseExport();

return-1;

}
close(fd1);

int fd3;
char buf1[35];
snprintf(buf1,35,"/sys/class/gpio/gpio%d/direction",pin);
fd3=open(buf1,O_WRONLY);
if(fd3==-1)
{
printf("failed to open gpio direction for writing\r\n");

CloseExport();

return-1;
}
if(write(fd3,"out",3)<0)
{
close(fd3);

printf("Failed to set direction\r\n");

CloseExport();

return-1;
}
close(fd3);

int fd5;
char buf2[30];

snprintf(buf2,30,"/sys/class/gpio/gpio%d/value",pin);
fd5=open(buf2,O_WRONLY);
if(fd5==-1)
{
printf("Failed to open gpio value for writing\r\n");
CloseExport();
return -1;
}

if(write(fd5,"1",1)<0)
{
close(fd5);
printf("Failedto set 1");
CloseExport();
return -1;
}
close(fd5);

sleep(1);
printf("Success !!\r\n");
CloseExport();

return 0;
}

2016年9月11日星期日

[Raspberry] 在Raspberry Pi 2 使用GPIO(一)

查看gpio的物理地址：

cat /proc/iomem |grep gpio | grep gpio

3f2000000=3f20000b3 : /soc/gpio@7e200000

程式:

#include <cstdlib>

#include <stdio.h>

#include <stdlib.h>

#include <fcntl.h>

#include <sys/mman.h>

#include <unistd.h>

#define BCM2708_PERI_BASE 0x3F000000 //0x20000000 --> Raspberry Pi的位址

#define GPIO_BASE (BCM2708_PERI_BASE +0x200000) /* GPIO controller*/

#define PAGE_SIZE (4*1024)

#define BLOCK_SIZE (4*1024)

int mem_fd;

void *gpio_map;

//IO access

volatile unsigned *gpio;

//GPIO setup macros. Always use INP_GPIO(x) before using

//OUT_GPIO(x) or SET_GPIO_ALT(x,y)

#define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))

#define OUT_GPIO(g) *(gpio+((g)/10)) |= (1<<(((g)%10)*3))

#define SET_GPIO_ALT(g,a) *(gpio+(((g)/10))) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))

#define GPIO_SET *(gpio+7) //sets bits which are 1 ignores bits which are 0

#define GPIO_CLR *(gpio+10) //clears bits which are 1 ignores bits which are 0

#define GET_GPIO(g) (*(gpio+13)&(1<<g)) //0 if Low, (1<<g) if High

#define GPIO_PULL *(gpio+37) //pull up/pull down

using namespace std;

void setup_io()

{

if((mem_fd = open("/dev/mem",O_RDWR|O_SYNC))<0)

{

printf("Can not open /dev/mem \n");

exit(-1);

}

//map GPIO

gpio_map=mmap(

NULL, //anyadress inourspace will do

BLOCK_SIZE, //map length

PROT_READ|PROT_WRITE, //enable reading & writting to mappedmemory

MAP_SHARED, //shared with other processes

mem_fd, //fileto map

GPIO_BASE //offset to GPIOperipheral

);

close(mem_fd); //No need to keep mem_fd open after map

if(gpio_map==MAP_FAILED){

printf("mmap error %d\n",(int)gpio_map); //errnoalso set

exit(-1);

}

gpio=(volatile unsigned*)gpio_map;

}

int main(int argc, char** argv) {

//set up gpi pointer for direct register access

setup_io();

printf("step 1 ok\r\n");

//MustuseINP_GPIO before we can use OUT_GPIO

INP_GPIO(14);

OUT_GPIO(14);

for(int j=0;j<10;j++)

{

GPIO_SET=1<<14;

sleep(1);

GPIO_CLR=1<<14;

sleep(1);

}

return 0;

}

開始跑出現 can not open /dev/mem,就停下來了

進入 NetBeans IDE 8.1 視窗

選擇 Run --> Set Project Configuration -->Customize…

左邊選擇Run,在右邊Run Command,加入 sudo

“${OUTPUT_PATH}” --> sudo “${OUTPUT_PATH}”

成功運行了 !!!

[Raspberry] 在Raspberry Pi 2 使用GPIO

原來在終端機上,這樣就可操控 GPIO:

操控 UART的TX(先把 UART disable了)

echo 14 > /sys/class/gpio/export -->設定可控制

echo out > /sys/class/gpio/gpio14/direction -->輸出腳

echo 1 > /sys/class/gpio/gpio14/value -->輸出1

echo 0 > /sys/class/gpio/gpio14/value -->輸出0

echo 14 > /sys/class/gpio/unexport -->取消建立出的 node

使用 GPIO readall 可看到 IO 的輸出(IN or out/0 or 1)

使用 debugfs 來觀看目前的GPIO設定

sudo mount –t debugfs debugfs /sys/kernel/debug

mount:debugfs is already mounted or /sys/kernel/debug busy

sudo cat /sys/kernel/debug/gpio

GPIOs 0-53 platform/3f2000000.gpio pinctrl-bcm2835:

gpio-14 ( |sysfs ) out hi

gpio-35 ( |? ) in hi

gpio-47 ( |? ) out lo

訂閱：文章 (Atom)

2016年9月20日 星期二

2016年9月14日 星期三

2016年9月13日 星期二

2016年9月12日 星期一

2016年9月11日 星期日

2016年9月20日星期二

2016年9月14日星期三

2016年9月13日星期二

2016年9月12日星期一

2016年9月11日星期日