Om te toets of 'n Bus Pirate werk, koppel +5V met VPU en 3.3V met ADC en toegang die bus pirate (gebruik Tera Term byvoorbeeld) en gebruik die opdrag ~:
# Use commandHiZ>~DisconnectanydevicesConnect (Vpu to+5V) and (ADCto+3.3V)Spacetocontinue# Press spaceCtrlAUXOKMODELEDOKPULLUPHOKPULLUPLOKVREGOKADCandsupply5V(4.96) OKVPU(4.96) OK3.3V(3.26) OKADC(3.27) OKBushighMOSIOKCLKOKMISOOKCSOKBusHi-Z0MOSIOKCLKOKMISOOKCSOKBusHi-Z1MOSIOKCLKOKMISOOKCSOKMODEandVREGLEDsshouldbeon!Anykeytoexit#Press spaceFound0errors.
Soos wat jy in die vorige opdraglyn kan sien, het dit gesê dat dit 0 foute gevind het. Dit is baie nuttig om te weet dit werk na aankoop of na die flits van 'n firmware.
Om met die bus pirate te verbind, kan jy die dokumentasie volg:
In hierdie geval gaan ek met 'n EPROM verbind: ATMEL901 24C256 PU27:
Om met die bus pirate te praat, het ek Tera Term gebruik wat aan die pirate bus COM-poort gekoppel is met 'n Setup --> Serial Port --> Speed van 115200.
In die volgende kommunikasie kan jy vind hoe om die bus pirate voor te berei om I2C te praat en hoe om van die geheue te skryf en te lees (Kommentaar verskyn met "#", verwag nie daardie deel in die kommunikasie nie):
# Check communication with buspirateiBusPiratev3.5CommunityFirmwarev7.1-goo.gl/gCzQnW [HiZ 1-WIREUARTI2CSPI2WIRE3WIREKEYBLCDPICDIO]Bootloaderv4.5DEVID:0x0447REVID:0x3046 (24FJ64GA00 2B8)http://dangerousprototypes.com# Check voltagesI2C>vPinstates:1.(BR) 2.(RD) 3.(OR) 4.(YW) 5.(GN) 6.(BL) 7.(PU) 8.(GR) 9.(WT) 0.(Blk)GND3.3V5.0VADCVPUAUXSCLSDA--PPPIIIIIIIGND3.27V4.96V0.00V4.96VLHHLL#Notice how the VPU is in 5V becausethe EPROM needs 5V signals# Get mode optionsHiZ>m1.HiZ2.1-WIRE3.UART4.I2C5.SPI6.2WIRE7.3WIRE8.KEYB9.LCD10.PIC11.DIOx.exit(withoutchange)# Select I2C(1)>4I2Cmode:1.Software2.Hardware# Select Software mode(1)>1Setspeed:1.~5kHz2.~50kHz3.~100kHz4.~240kHz# Select communication spped(1)>2Clutchdisengaged!!!Tofinishsetup,startupthepowersupplieswithcommand'W'Ready# Start communicationI2C>WPOWERSUPPLIESONClutchengaged!!!# Get macrosI2C>(0)0.Macromenu1.7bitaddresssearch2.I2Csniffer#Get addresses of slaves connectedI2C>(1)SearchingI2Caddressspace.Founddevicesat:0xA0(0x50W) 0xA1(0x50R)# Note that each slave will have a write address and a read address# 0xA0 ad 0xA1 in the previous case# Write "BBB" in address 0x69I2C>[0xA00x000x690x420x420x42]I2CSTARTBITWRITE:0xA0ACKWRITE:0x00ACKWRITE:0x69ACKWRITE:0x42ACKWRITE:0x42ACKWRITE:0x42ACKI2CSTOPBIT# Prepare to read from address 0x69I2C>[0xA00x000x69]I2CSTARTBITWRITE:0xA0ACKWRITE:0x00ACKWRITE:0x69ACKI2CSTOPBIT# Read 20B from address 0x69 configured beforeI2C>[0xA1r:20]I2CSTARTBITWRITE:0xA1ACKREAD:0x42ACK0x42ACK0x42ACK0x20ACK0x48ACK0x69ACK0x20ACK0x44ACK0x72ACK0x65ACK0x67ACK0x21ACK0x20ACK0x41ACK0x41ACK0x41ACK0x00ACK0xFFACK0xFFACK0xFFNACK
Sniffer
In hierdie scenario gaan ons die I2C kommunikasie tussen die arduino en die vorige EPROM snuffel, jy moet net albei toestelle kommunikeer en dan die bus pirate aan die SCL, SDA en GND panele koppel:
I2C>m1.HiZ2.1-WIRE3.UART4.I2C5.SPI6.2WIRE7.3WIRE8.KEYB9.LCD10.PIC11.DIOx.exit(withoutchange)(1)>4I2Cmode:1.Software2.Hardware(1)>1Setspeed:1.~5kHz2.~50kHz3.~100kHz4.~240kHz(1)>1Clutchdisengaged!!!Tofinishsetup,startupthepowersupplieswithcommand'W'Ready# EVEN IF YOU ARE GOING TO SNIFF YOU NEED TO POWER ON!I2C>WPOWERSUPPLIESONClutchengaged!!!# Start sniffing, you can see we sniffed a write commandI2C>(2)SnifferAnykeytoexit[0xA0+0x00+0x69+0x41+0x41+0x41+0x20+0x48+0x69+0x20+0x44+0x72+0x65+0x67+0x21+0x20+0x41+0x41+0x41+0x00+]
