研究筆記 - Bus Pirate

緣起

• 請參考，摘錄如下

• 零件分享 - SparkFun: Bus Pirate - v3.6a
• 
  
• 捷克，這真是太神奇了，竟然有人這麼貼心的去解決驗證上的問題
• 當作板子或是做 IC 的時候，常常需要驗證各式各樣的介面
• 
  
• 當我們買到新的零件的時候，也是首先要確定主板跟零件的介面能夠相符
• 問題是：要不是對硬體規格，或是那些介面很熟的人，要光看 datasheet 就確認沒問題是相當困難的，何況有些介面有很多不同模式，操作電壓，一不對齊，東西就是不動給你看
• 
  
• 古時候，一般通用介面有一種方法是找，類似 51 的控制器，個別寫 code 去驗證，後來有 Arduion, 剪剪貼貼（主要是有範例）就方便多了。但是基本上，驗證時，最好是拿一個 golden 來驗證，Code 還改來改去哪裡知道是 code 有問題，還是待驗證的東西有問題？
• 
  
• 這個零件就是正面嘗試解決這樣的問題，支援很多的介面，已經有命令列支援驗證需要的功能，也在 PC 上有程式碼（python,perl）支援驗證需要的程式，連操作電壓都可支援 0-5.5V。
• 驗證人員的福音，請參考

參考

零件主頁：https://www.sparkfun.com/products/12942

Bus Pirate v3.6a Hookup Guide

Bus Pirate wiki

Bus Pirate 101 tutorial

Bus Pirate menu options guide

實驗過程

• Serial Terminal use minicom
• minicom installation
• minicom -s ( for setup )
  • 115200 N81, no hardware flow control
• 

• Selftest

HiZ>~                                                                          

Disconnect any devices                                                         

Connect (Vpu to +5V) and (ADC to +3.3V)                                        

Space to continue                                                              

Ctrl                                                                           

AUX OK                                                                         

MODE LED OK                                                                    

PULLUP H OK                                                                    

PULLUP L OK                                                                    

VREG OK                                                                        

ADC and supply                                                                 

5V(5.00) OK                                                                    

VPU(4.99) OK                                                                   

3.3V(3.30) OK                                                                  

ADC(3.31) OK                                                                   

Bus high                                                                       

MOSI OK                                                                        

CLK OK                                                                         

MISO OK                                                                        

CS OK                                                                          

Bus Hi-Z 0                                                                     

MOSI OK                                                                        

CLK OK                                                                         

MISO OK                                                                        

CS OK                                                                          

Bus Hi-Z 1                                                                     

MOSI OK                                                                        

CLK OK                                                                         

MISO OK                                                                        

CS OK                                                                          

MODE and VREG LEDs should be on!                                               

Any key to exit 

Found 0 errors.

• ADC Test

將 3.3V 接上 ADC 想量到 3.3V

reset(#) 後 Measure ADC(d) =>  VOLTAGE PROBE: 0.00V 

因為 Power supplies 是 OFF, 需使用 PSU(W) 

PSU(W) 在 Default mode 不支援，切換到 1-WIRE 後，Power suppliesn ON(W)

1-WIRE>d

VOLTAGE PROBE: 3.31V 

• Try binary mode by using python

bus pirate python library and examples

• Code trace
• i2c-test.py
• i2c = I2C("/dev/ttyUSB0", 115200)
• pyBusPirateLite/I2C.py
• from .BitBang import BBIO => BitBang.py
• if i2c.BBmode():

• class BBIO:
•         def __init__(self, p="/dev/bus_pirate", s=115200, t=1):
•                 self.port = serial.Serial(p, s, timeout=t)
•         
•         def BBmode(self):
•                 self.port.flushInput();                
•                 for i in range(20):
•                         self.port.write("\x00");
•                         r,w,e = select.select([self.port], [], [], 0.01);
•                         if (r): break;
•                 if self.response(5) == "BBIO1": return 1
•                 else: return 0
• Test run 

i2c-test.py

Entering raw I2C mode:  OK.

Configuring I2C.

Reading EEPROM.

0

0

0

0

0

None

Reset Bus Pirate to user terminal: 

OK.

• Setup GPIO High

DIO>a                                                                          

AUX LOW                                                                        

DIO>A                                                                          

AUX HIGH                                                                       

將 3V3 PIN 連上 AUX PIN

DIO>@                                                                          

AUX INPUT/HI-Z, READ: 0                                                        

DIO>W                                                                          

Power supplies ON                                                              

DIO>@                                                                          

AUX INPUT/HI-Z, READ: 1

• Using MACRO

Macros, user macros

• Save user macro
  • 好像沒有這個功能
• Trace firmware code

firmware

• main.c
• procMenu.c->serviceuser : CLI parser
• most of define in base.h

• Embedded Script language - Basic
• Upgrade and debug firmware study

• Pirate-Loader console upgrade application (GNU/Linux, Mac, Windows)
• pirate-loader source
  • The code include for mac, but compile may get compile error.

• ICE Debug
  • SEGGER ,  cable 在網上買
• GPIO 不夠的問題
  • 不改 Firmware 的技巧是什麼？
  • 改 Firmware, 跳線能做到多少？
  • 改 Firmware 不跳線能做到多少？
  • 外掛 Multiplexer 能做到多少？

BP 自動化層級區分

• 手動
• 使用內建 system script, user script, script engine
• 使用 python 自動化執行與報表輸出
• 機構與制動
  • 開關 120V
  • 按 reset
  • 自動放 IC 到 socket
• 需外部麵包板級協調電路
• 需外部硬體協同輔助運作
  • 自動化另外一個板子與本體協同

共用自動測試基本情境與需求

• 開機 100 次，檢查 LED or GPIO
  • 驅動 Relay 開關機，檢查 GPIO
• 開機用 UART 檢查特定輸出或值
  • 
    
• 自動 UART /USB 升級，固定執行外部程式

輔助器具研究

• 自動按 Reset Button

摘自 樂高機器人創意寶典 181 種絕妙新組合

相關專案