BUS PIRATE FIRMWARE update (V.0C), JTAG and much more
Download: buspirate.v0c.zip
A few weeks ago we wrote about our Bus Pirate universal serial interface tool. We used the recent holiday to add some new features, like a JTAG programmer, macros, frequency measurement, and more. A major code reorganization makes everything simpler to read and update.
Check out the a demonstration of the new features below. We’re compiling a roadmap and wish list, so share your ideas in the comments. You can also see how we used the Bus Pirate to read a smart card and test-drive an I2C crystal oscillator.
New protocols
I2C>m <–setup mode
1. HiZ <– high impedance pins (safe mode)
2. 1-WIRE <– not ready for this release
3. UART
4. I2C
5. SPI
6. JTAG <– interface and programmer
7. RAW2WIRE
8. RAW3WIRE
MODE>1
900 mode SET
HiZ>
This firmware release lists three new protocols.
Hi-Z makes all pins high impedance/input, a safe state that won’t damage an attached circuit. To be safe, the Bus Pirate now starts in this mode.
1-Wire is listed, but we couldn’t include it in this release because we still don’t have any parts to test with our library. This is just a placeholder for now, but it will be added as soon as we get a 1-Wire part to test.
We wrote a simplified JTAG interface that includes a XSVF player for programming JTAG device chains.
**We included a hardware I2C library, but according to the device errata there’s a bug in the 24FJ64GA002 rev3 I2C module. This will work with a different chip (e.g. a 28pin dsPIC33).
Connection table
PIN
1-Wire
I2C*
SPI**
RS232
JTAG
B9
Sda
Sda
MOSI
–
TDI
B8
–
SCL
CLK
–
TCK
B7
–
–
MISO
RX
TDO
B6
–
–
CS
TX
TMS
B5
Aux
Aux
Aux
Aux
Aux
Maa
Gnd
Gnd
Gnd
Gnd
Gnd
*also raw 2 wire. **also raw 3 wire.
The new modes connect to the Bus Pirate as described in the table.
New features and settings
Frequency measurement
HiZ>F <– do a frequency count 9xx FREQ count ON AUX: 22199552Hz (22MHz) HiZ>
As seen in the DS1077 demonstration, we added a frequency counter to the Bus Pirate’s AUX pin. ‘F’ steps frequency, maximum of about 50MHz.
Assign axillary control
HiZ>c <– menu c AUX PIN 1. AUX (DEFAULT) 2. CS/TMS MODE>1 <– set AUX control mode 9xx AUX: DEFAULT setting (AUX PIN) HiZ>
Sometimes we need to control the chip select (CS) /JTAG state device (TMS) pins manually. ‘c’ toggles the pin control between the axillary pin and the chip select pin.
Set terminal speed
HiZ>b <– menu b Set serial port speed: (bps) 1. 300 ... 9. 115200 SPEED>9 <– set speed Adjust your terminal and press space to continue HiZ>
‘b’ adjusts the PC-side serial port speed.
Macros
A new syntax addition, ‘(#)’, triggers protocol dependent macros.
JTAG>(0) <–macro 0 0.Macro menu 1.Reset chain 2.Probe chain 3.XSVF player JTAG>
In any mode, use the macro (0) to display a menu of available macros.
I2C address search
I2C>(1) <–scan I2C addresses macro xxx searching 7bit I2C address space. Found devices at: 0xB0 0xB1 <–DS1077 responds to write and read address I2C>
The I2C library includes a macro to automatically search the I2C address range for devices. helpful when you work with an unknown chip.
Raw2wire smart card ISO 7813-3 ATR
RAW2WIRE>(1)<–ATR and decode macro ISO 7813-3 ATR 950 AUX LOW 951 AUX HIGH 4xx RAW2WIRE 0x01 CLOCK TICKS 950 AUX LOW ISO 7813-3 reply: 0xA2 0x13 0x10 0x91<–ATR bytes Protocol: 2 wire <–decoded ATR data Read type: to end<– Data units: 256 <– Data unit length: 8 bits <– RAW2WIRE>
Macro 1 resets and identifies a smart card. For much more about the ISO7813-3 ATR, see how we used the Bus Pirate to read a smart card.
JTAG
JTAG is a debugging and programming interface for all kinds of electronics. The raw hardware interface can be accessed with the Bus Pirate’s raw 3 wire library, but we added a few features to make it much easier.
JTAG has different modes where data entry does different things. Modes are navigated with the JTAG TMS signal; there are a bunch of JTAG modes, called states.The Bus Pirate’s JTAG library is just the raw 3 wire library, enhanced to help with JTAG state changes.
We only implemented the JTAG states we need to get data in and out of a JTAG device chain: reset, idle, data register, and instruction register. Macro (1) issues a JTAG chain reset, and initializes the chain to the idle state. { puts the JTAG chain in data register mode. [ puts the chain in instruction register mode. ] or } return the chain to the idle state. The Bus Pirate has an internal state device tracker that is smart enough to manage the chain without explicitly returning the chain to idle; in other words, you don’t have to close your tags. The state device tracker reports every state change to help debug problems.
JTAG>[0xfe {rrrr} <– same as [0xfe]{rrrr}
xxx JTAGSM: already IDLE
xxx JTAGSM: IDLE->Instruction Register (DELAYED ONE bit FOR TMS)
610 JTAG ready TO write IR <– JTAG chain instruction register
620 JTAG WRITE: 0xFE <– request ID
xxx JTAGSM: (WROBUS PIRATE FIRMWARE update (V.0C), JTAG and much more (###) Download: buspirate.v0c.zip
A few weeks ago we wrote about our Bus Pirate universal serial interface tool. We used the recent holiday to add some new features, like a JTAG programmer, macros, frequency measurement, and more. A major code reorganization makes everything simpler to read and update.
Check out the a demonstration of the new features below. We’re compiling a roadmap and wish list, so share your ideas in the comments. You can also see how we used the Bus Pirate to read a smart card and test-drive an I2C crystal oscillator.
New protocols
I2C>m <–setup mode
1. HiZ <– high impedance pins (safe mode)
2. 1-WIRE <– not ready for this release
3. UART
4. I2C
5. SPI
6. JTAG <– interface and programmer
7. RAW2WIRE
8. RAW3WIRE
MODE>1
900 mode SET
HiZ>
This firmware release lists three new protocols.
Hi-Z makes all pins high impedance/input, a safe state that won’t damage an attached circuit. To be safe, the Bus Pirate now starts in this mode.
1-Wire is listed, but we couldn’t include it in this release because we still don’t have any parts to test with our library. This is just a placeholder for now, but it will be added as soon as we get a 1-Wire part to test.
We wrote a simplified JTAG interface that includes a XSVF player for programming JTAG device chains.
**We included a hardware I2C library, but according to the device errata there’s a bug in the 24FJ64GA002 rev3 I2C module. This will work with a different chip (e.g. a 28pin dsPIC33).
Connection table
PIN
1-Wire
I2C*
SPI**
RS232
JTAG
B9
Sda
Sda
MOSI
–
TDI
B8
–
SCL
CLK
–
TCK
B7
–
–
MISO
RX
TDO
B6
–
–
CS
TX
TMS
B5
Aux
Aux
Aux
Aux
Aux
Maa
Gnd
Gnd
Gnd
Gnd
Gnd
*also raw 2 wire. **also raw 3 wire.
The new modes connect to the Bus Pirate as described in the table.
New features and settings
Frequency measurement
HiZ>F <– do a frequency count 9xx FREQ count ON AUX: 22199552Hz (22MHz) HiZ>
As seen in the DS1077 demonstration, we added a frequency counter to the Bus Pirate’s AUX pin. ‘F’ steps frequency, maximum of about 50MHz.
Assign axillary control
HiZ>c <– menu c AUX PIN 1. AUX (DEFAULT) 2. CS/TMS MODE>1 <– set AUX control mode 9xx AUX: DEFAULT setting (AUX PIN) HiZ>
Sometimes we need to control the chip select (CS) /JTAG state device (TMS) pins manually. ‘c’ toggles the pin control between the axillary pin and the chip select pin.
Set terminal speed
HiZ>b <– menu b Set serial port speed: (bps) 1. 300 ... 9. 115200 SPEED>9 <– set speed Adjust your terminal and press space to continue HiZ>
‘b’ adjusts the PC-side serial port speed.
Macros
A new syntax addition, ‘(#)’, triggers protocol dependent macros.
JTAG>(0) <–macro 0 0.Macro menu 1.Reset chain 2.Probe chain 3.XSVF player JTAG>
In any mode, use the macro (0) to display a menu of available macros.
I2C address search
I2C>(1) <–scan I2C addresses macro xxx searching 7bit I2C address space. Found devices at: 0xB0 0xB1 <–DS1077 responds to write and read address I2C>
The I2C library includes a macro to automatically search the I2C address range for devices. helpful when you work with an unknown chip.
Raw2wire smart card ISO 7813-3 ATR
RAW2WIRE>(1)<–ATR and decode macro ISO 7813-3 ATR 950 AUX LOW 951 AUX HIGH 4xx RAW2WIRE 0x01 CLOCK TICKS 950 AUX LOW ISO 7813-3 reply: 0xA2 0x13 0x10 0x91<–ATR bytes Protocol: 2 wire <–decoded ATR data Read type: to end<– Data units: 256 <– Data unit length: 8 bits <– RAW2WIRE>
Macro 1 resets and identifies a smart card. For much more about the ISO7813-3 ATR, see how we used the Bus Pirate to read a smart card.
JTAG
JTAG is a debugging and programming interface for all kinds of electronics. The raw hardware interface can be accessed with the Bus Pirate’s raw 3 wire library, but we added a few features to make it much easier.
JTAG has different modes where data entry does different things. Modes are navigated with the JTAG TMS signal; there are a bunch of JTAG modes, called states.The Bus Pirate’s JTAG library is just the raw 3 wire library, enhanced to help with JTAG state changes.
We only implemented the JTAG states we need to get data in and out of a JTAG device chain: reset, idle, data register, and instruction register. Macro (1) issues a JTAG chain reset, and initializes the chain to the idle state. { puts the JTAG chain in data register mode. [ puts the chain in instruction register mode. ] or } return the chain to the idle state. The Bus Pirate has an internal state device tracker that is smart enough to manage the chain without explicitly returning the chain to idle; in other words, you don’t have to close your tags. The state device tracker reports every state change to help debug problems.
JTAG>[0xfe {rrrr} <– same as [0xfe]{rrrr}
xxx JTAGSM: already IDLE
xxx JTAGSM: IDLE->Instruction Register (DELAYED ONE bit FOR TMS)
610 JTAG ready TO write IR <– JTAG chain instruction register
620 JTAG WRITE: 0xFE <– request ID
xxx JTAGSM: (WROEfinition protokolla. Viimeinen merkintä on tällä hetkellä "#define raw3wire 7", joten seuraava merkintä voisi olla "#define mycustomwire 8".
Buspirate.c - Sisällytä otsikkotiedosto, jossa on pääsy käsittelytoimintoon. Lisää valikon merkintä Char * -tilassa [] = Muuttuja luettelo. Valikon merkinnän tulisi olla samassa paikassa luettelossa kuin base.h-määrittämä numero. Jos mycustomwire on numero 8, sen pitäisi olla kahdeksan merkintä tila muuttuja. Lopuksi lisää lisäkytkin bpprocess () -toimintoon, joka kutsuu räätälöidyn kirjaston käsittelyn rutiinineen, kun tila on asetettu "mycustomwire".
Ota se edelleen: Hack A Day Wish List
Me koostimme palautetta, jonka olemme päässeet kolmeen toiveiden luetteloon: protokollat, ominaisuudet ja makrot.
Pöytäkirjat
1-lanka, jonka määrittäminen (* Valmis heti, kun meillä on osia testata sitä)
OBD-II (kiitos [Shadyman])
Voi
MIDI (Wikipedia)
DMX512-A
IrDA, RC5X jne.
Jotkut protokollat edellyttävät ulkoista lähetin-vastaanotinta.
ominaisuudet
Pulssi-leveyden modulaattori, taajuusgeneraattori
"Odota, kunnes keskeytys" komento
Muunna taajuusmittaus syötteen kaappauksen oheislaitteeseen
Salli taajuusmittaus millä tahansa PIN-koodilla
Näytä nykyisten kokoonpanoasetusten ja PIN-tilat.
Integer Toista arvot irtotavarana Lue, kellot, viivästykset jne.
CRC-generaattori
Makros
Läpinäkyvä UART Bridge
SD-kortin alustaminen, Meta Data Uutteet ja Dump
EEPROM-ohjelma / Dump (I2C / SPI)
Nokia 6100 LCD-alustus, valvonta
NMEA GPS Data Dekooderi
Onko sinulla mitään lisätä luetteloon?
Firmware Download: Buspirate.v0c.zip