PIC18F2550のUSB MIDIの開発環境を整える

PIC18F2550をUSB MIDIのターゲットとして使っています。記録によると５年ぶりにPIC18F2550の開発環境を再構築しようとして、変わってしまっていたので、メモを残します。

PIC18F2550の開発キットは今でも購入できます。
http://akizukidenshi.com/catalog/g/gK-03948/

## インストールしたアプリ
### IDE
MPLAB X IDE v5.20
https://www.microchip.com/mplab/mplab-x-ide

### Compiler
MPLAB® XC8 Compiler v2.05
https://www.microchip.com/mplab/compilers

### peripheral libraries
PIC18F Legacy Peripheral Libraries v2.0 - Windows
https://www.microchip.com/mplab/compilers

### PICピックプログラマーVer.4
http://akizukidenshi.com/catalog/contents2/ver4support.aspx
picpgm6.exe を使います。

### Configuration

``` config.h

// PIC18F2550 Configuration Bit Settings

// 'C' source line config statements

// CONFIG1L
#pragma config PLLDIV = 5       // PLL Prescaler Selection bits (Divide by 5 (20 MHz oscillator input))
#pragma config CPUDIV = OSC1_PLL2// System Clock Postscaler Selection bits ([Primary Oscillator Src: /1][96 MHz PLL Src: /2])
#pragma config USBDIV = 2       // USB Clock Selection bit (used in Full-Speed USB mode only; UCFG:FSEN = 1) (USB clock source comes from the 96 MHz PLL divided by 2)

// CONFIG1H
#pragma config FOSC = HSPLL_HS  // Oscillator Selection bits (HS oscillator, PLL enabled (HSPLL))
#pragma config FCMEN = OFF      // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled)
#pragma config IESO = OFF       // Internal/External Oscillator Switchover bit (Oscillator Switchover mode disabled)

// CONFIG2L
#pragma config PWRT = ON        // Power-up Timer Enable bit (PWRT enabled)
#pragma config BOR = OFF         // Brown-out Reset Enable bits (Brown-out Reset enabled in hardware only (SBOREN is disabled))
#pragma config BORV = 2         // Brown-out Reset Voltage bits (Setting 1 2.79V)
#pragma config VREGEN = ON      // USB Voltage Regulator Enable bit (USB voltage regulator enabled)

// CONFIG2H
#pragma config WDT = OFF        // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
#pragma config WDTPS = 32768    // Watchdog Timer Postscale Select bits (1:32768)

// CONFIG3H
#pragma config CCP2MX = OFF      // CCP2 MUX bit (CCP2 input/output is multiplexed with RC1)
#pragma config PBADEN = OFF     // PORTB A/D Enable bit (PORTB<4:0> pins are configured as digital I/O on Reset)
#pragma config LPT1OSC = OFF    // Low-Power Timer 1 Oscillator Enable bit (Timer1 configured for higher power operation)
#pragma config MCLRE = OFF      // MCLR Pin Enable bit (RE3 input pin enabled; MCLR pin disabled)

// CONFIG4L
#pragma config STVREN = OFF      // Stack Full/Underflow Reset Enable bit (Stack full/underflow will cause Reset)
#pragma config LVP = OFF         // Single-Supply ICSP Enable bit (Single-Supply ICSP enabled)
#pragma config XINST = OFF      // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode))

// CONFIG5L
#pragma config CP0 = OFF        // Code Protection bit (Block 0 (000800-001FFFh) is not code-protected)
#pragma config CP1 = OFF        // Code Protection bit (Block 1 (002000-003FFFh) is not code-protected)
#pragma config CP2 = OFF        // Code Protection bit (Block 2 (004000-005FFFh) is not code-protected)
#pragma config CP3 = OFF        // Code Protection bit (Block 3 (006000-007FFFh) is not code-protected)

// CONFIG5H
#pragma config CPB = OFF        // Boot Block Code Protection bit (Boot block (000000-0007FFh) is not code-protected)
#pragma config CPD = OFF        // Data EEPROM Code Protection bit (Data EEPROM is not code-protected)

// CONFIG6L
#pragma config WRT0 = OFF       // Write Protection bit (Block 0 (000800-001FFFh) is not write-protected)
#pragma config WRT1 = OFF       // Write Protection bit (Block 1 (002000-003FFFh) is not write-protected)
#pragma config WRT2 = OFF       // Write Protection bit (Block 2 (004000-005FFFh) is not write-protected)
#pragma config WRT3 = OFF       // Write Protection bit (Block 3 (006000-007FFFh) is not write-protected)

// CONFIG6H
#pragma config WRTC = OFF       // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) are not write-protected)
#pragma config WRTB = OFF       // Boot Block Write Protection bit (Boot block (000000-0007FFh) is not write-protected)
#pragma config WRTD = OFF       // Data EEPROM Write Protection bit (Data EEPROM is not write-protected)

// CONFIG7L
#pragma config EBTR0 = OFF      // Table Read Protection bit (Block 0 (000800-001FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR1 = OFF      // Table Read Protection bit (Block 1 (002000-003FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR2 = OFF      // Table Read Protection bit (Block 2 (004000-005FFFh) is not protected from table reads executed in other blocks)
#pragma config EBTR3 = OFF      // Table Read Protection bit (Block 3 (006000-007FFFh) is not protected from table reads executed in other blocks)

// CONFIG7H
#pragma config EBTRB = OFF      // Boot Block Table Read Protection bit (Boot block (000000-0007FFh) is not protected from table reads executed in other blocks)

// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.

#include <xc.h>



```

### CLOCK DIAGLAM

![pic2550clockdiaglam.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/58417/5e1a5256-b322-8047-9a40-63319d4a6cea.png)

### Microchip Libraries for Applications
https://www.microchip.com/mplab/microchip-libraries-for-applications
今日現在の最新[v2018_11_26です。

以前使っていたバージョンv2013_12_20はコンパイルが通りませんでした。
https://www.microchip.com/mplab/microchip-libraries-for-applications/mla-legacy
前のバージョンはDownloads Archiveのタグからダウンロードできます。

## USB MIDI Example

### Project
PIC18F2550には、
C:\microchip\mla\v2018_11_26\apps\usb\device\audio_midi\firmware\picdem_fs_usb
を使います。Device をPIC18F2550に変更します。

![image.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/58417/b03e25b2-8acd-c2be-2dce-cc960336a08d.png)