8ピンPICでUSB －16FUSBの移植－

8ピンPICでUSB

Emanuel Paz様の16FUSBを8ピンのPIC12F1822に実装しました。他の8ピンPICにも移植可能です。


Emanuel Paz様の16FUSBのページ

16FUSB - A USB 1.1 implementation for PIC16F628/628A

http://www.lendlocus.com/?q=16fusb#firmware


このページで紹介されているDirect I/O HIDでは8ピンの良さを生かしきれないので、
シリアルインターフェースを用いた双方向通信機能（擬似CDC)を実装しました。

概要
壱 ）ＨＩＤレポートでキャラクタをやり取りします。エンドポイント1(IN/OUT)を使用
弐 ）バルク転送できません
参 ）工夫すれば通信条件をホスト側から変更できますが、現時点では対応してません
(現在の通信条件 9600bps 8bit ノーパリティ ストップ1bit フロー制御なし)

PICのRAMはバンク０ ($20～$7F) のみ使用  

オリジナルのDirect I/O HIDは$A0 も使用

 

＜回路図＞

＜シリアルホストプログラムでのループバックテスト＞

下段に入力した文字をＨＩＤレポートでＰＩＣに送信、

ＰＩＣはこのデータをシリアル送信。

ＰＩＣがシリアル受信すると、受信した文字をＨＩＤレポートでホストに送信、上段に表示。

＜ファームウエア＞
16FUSBのページのFirmware以下にある

16FUSB-dio_hid-src-1.2.tar.gz

を展開してPIC12F1822用に書き換え、再コンパイル。





＜HEXファイル PIC12F1822＞(2013年２月２４日　改定)


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:00000001FF

＜ホストプログラム＞

コンパイルにはatlstr.h互換ライブラリTString.h（JEX様作）を使用しています。
ダウンロード先
http://victreal.com/Junk/_T/index.html


コンパイル環境　Microsoft Visual Studio 10.0

16FUSBのページのDirect I/O HID Sample Application (win32)以下にある

16FUSB_dio_hid_sample_application_win32-src-1.0.zip

を展開、TString.hを追加し、Form1.hを書き換えて、再コンパイル。
プロジェクトファイルはそのまま使用。


＜Form1.hのソース＞


#pragma once

#include "stdio.h"
#include <wtypes.h>
#include <string>
#include "Usb.h"
#include <iostream>
#include <stdlib.h>

#include "TString.h"

namespace My16FUSB_HID_DioSampleAPP {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace std;
using namespace System::Drawing;

using namespace System::Threading;

/// <summary>
/// Summary for Form1
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
delegate void SetCheckDelegate();
public:
Form1(void)
{
InitializeComponent();

usb = gcnew Usb();
usb->VendorID = 0x04D8;
usb->ProductID = 0x0628;

if(usb->findDevice()) {
this->toolStripStatuslabel1->Text = "Device Connected";

usb->openReadHandle();
bgWorker = gcnew System::ComponentModel::BackgroundWorker();
bgWorker->DoWork += gcnew DoWorkEventHandler( this, &Form1::inputThread );
bgWorker->RunWorkerAsync();

usb->openWriteHandle();
} else {
System::Windows::Forms::MessageBox::Show( L"Device not found!", L"16FUSB",
System::Windows::Forms::MessageBoxButtons::OK);
}
}

protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}

private: System::Windows::Forms::GroupBox^ groupBox1;
private: System::Windows::Forms::GroupBox^ groupBox2;
private: System::Windows::Forms::TextBox^ textBox1;
private: System::Windows::Forms::TextBox^ textBox2;

private: System::ComponentModel::IContainer^ components;
protected:

private:
/// <summary>
/// Required designer variable.
/// </summary>



private: System::Windows::Forms::StatusStrip^ statusStrip1;
private: System::Windows::Forms::ToolStripStatusLabel^ toolStripStatuslabel1;

System::ComponentModel::BackgroundWorker^ bgWorker;

Usb^ usb;


#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->groupBox1 = (gcnew System::Windows::Forms::GroupBox());
this->groupBox2 = (gcnew System::Windows::Forms::GroupBox());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->textBox2 = (gcnew System::Windows::Forms::TextBox());
this->statusStrip1 = (gcnew System::Windows::Forms::StatusStrip());
this->toolStripStatuslabel1 = (gcnew System::Windows::Forms::ToolStripStatusLabel());
this->groupBox1->SuspendLayout();
this->groupBox2->SuspendLayout();
this->statusStrip1->SuspendLayout();
this->SuspendLayout();
//
// groupBox1
//
this->groupBox1->Controls->Add(this->textBox1);
this->groupBox1->Location = System::Drawing::Point(30, 93);
this->groupBox1->Name = L"groupBox1";
this->groupBox1->Size = System::Drawing::Size(256, 73);
this->groupBox1->TabIndex = 1;
this->groupBox1->TabStop = false;
this->groupBox1->Text = L"Send to Serial";
//
// groupBox2
//
this->groupBox2->Controls->Add(this->textBox2);
this->groupBox2->Location = System::Drawing::Point(30, 13);
this->groupBox2->Name = L"groupBox2";
this->groupBox2->Size = System::Drawing::Size(256, 73);
this->groupBox2->TabIndex = 2;
this->groupBox2->TabStop = false;
this->groupBox2->Text = L"Recive from Serial";
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(18, 33);
this->textBox1->Multiline = true;
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(200, 30);
this->textBox1->TabIndex = 0;
this->textBox1->KeyPress += gcnew KeyPressEventHandler(this, &Form1::textBox1_KeyPress);
//
// textBox2
//
this->textBox2->Location = System::Drawing::Point(18, 33);
this->textBox2->Multiline = true;
this->textBox2->Name = L"textBox2";
this->textBox2->Size = System::Drawing::Size(200, 30);
this->textBox2->TabIndex = 0;
this->textBox2->ReadOnly = true;
//
// statusStrip1
//
this->statusStrip1->Items->AddRange(gcnew cli::array< System::Windows::Forms::ToolStripItem^ >(1) {this->toolStripStatuslabel1});
this->statusStrip1->Location = System::Drawing::Point(0, 197);
this->statusStrip1->Name = L"statusStrip1";
this->statusStrip1->Size = System::Drawing::Size(319, 22);
this->statusStrip1->TabIndex = 4;
this->statusStrip1->Text = L"statusStrip1";
//
// toolStripStatuslabel1
//
this->toolStripStatuslabel1->Name = L"toolStripStatuslabel1";
this->toolStripStatuslabel1->Size = System::Drawing::Size(0, 17);
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(319, 219);
this->Controls->Add(this->statusStrip1);
this->Controls->Add(this->groupBox2);
this->Controls->Add(this->groupBox1);
this->Name = L"Form1";
this->Text = L"16FUSB Serial HID Sample App";
this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
this->groupBox1->ResumeLayout(false);
this->groupBox1->PerformLayout();
this->groupBox2->ResumeLayout(false);
this->groupBox2->PerformLayout();
this->statusStrip1->ResumeLayout(false);
this->statusStrip1->PerformLayout();
this->ResumeLayout(false);
this->PerformLayout();

}
#pragma endregion

private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
if(this->toolStripStatuslabel1->Text == "") {
Application::Exit();
}
}

private: System::Void inputThread( Object^ sender, DoWorkEventArgs^ e ) {

unsigned char *inputReport;

while(true) {
char buf[] = "1";
char* orig = buf;
cout << orig << "(char *)" << endl;

inputReport = usb->readReport();

signed char temp = (signed char)inputReport[1];

buf[0] = temp;

String^ systemstring = gcnew String(orig);
Console::WriteLine("{0}", systemstring);
delete systemstring;

textBox2->AppendText(systemstring);
}
}

private: System::Void textBox1_KeyPress(Object^ sender, KeyPressEventArgs^ e) {

unsigned char outputReport[2];
outputReport[0] = 0;
outputReport[1] = Convert::ToInt32(e->KeyChar);
usb->writeReport(outputReport);
}

};

}

.