Bus: SPI (serial peripheral interface).
Connections: four pins (MOSI/MISO/CLOCK/CS) and ground.
Output type: 3.3volt normal, or open collector (pull-up resistors required).
Pull-up resistors: required for open drain output mode (2K – 10K).
Maximum voltage: 5.5volts (5volt safe).

Syntax Description
A/a/@ Toggle auxiliary pin. Capital “A” sets AUX high, small “a” sets to ground. @ sets aux to input (high impedance mode) and reads the pin value.
D/d Measure voltage on the ADC pin (v1+ hardware only).
W/w Capital ‘W’ enables the on-board power supplies. Small ‘w’ disables them. (v1+ hardware only).
[ Chip select (CS) active (low).
{ CS active (low), show the SPI read byte after every write.
] or } CS disable (high).
R or r Read one byte by sending dummy byte (0xff). (r:1…255 for bulk reads)
0b Write this binary value. Format is 0b00000000 for a byte, but partial bytes are also fine: 0b1001.
0h/0x Write this HEX value. Format is 0h01 or 0×01. Partial bytes are fine: 0xA. A-F can be lower-case or capital letters.
0-255 Write this decimal value. Any number not preceded by 0x, 0h, or 0b is interpreted as a decimal value.
, Value delimiter. Use a coma or space to separate numbers. Any combination is fine, no delimiter is required between non-number values: {0xa6,0, 0 16 5 0b111 0haF}.
& Delay 1uS. (&:1…255 for multiple delays)
(#) Run macro, (0) for macro list
Macro Description
0 Macro menu
1 SPI bus sniffer with configurable CS filter.

Configuration options

Speed – 30kHz, 125kHz, 250kHz, 1MHz.

Clock polarity – idle low, idle high.

Output clock edge – idle to active, active to idle.

Input sample phase – middle, end.

Output type – open drain/open collector (high=Hi-Z, low=ground) , normal (high=3.3volts, low=ground). Use open drain/open collector output types with pull-up resistors for multi-voltage interfacing.

SPI Bus sniffer

The SPI sniffer is implemented in hardware and should work up to 10MHz. It follows the configuration settings you entered for SPI mode.

  • [/]  – CS enable/disable
  • 0xXX – MOSI read
  • (0xXX)  – MISO read

SPI CS pin transitions are represented by the normal Bus Pirate syntax. The byte sniffed on the MISO pin is displayed inside ().

SPI>(1)
Sniff when:
1. CS low
2. CS high
3. All traffic
(1) >
SPI bus sniffer, any key exists
[0x30(0x00)0xff(0x12)0xff(0x50)][0x40(0x00)]

The SPI sniffer can read all traffic, or filter by the state of the CS pin. The byte sniffed on the MOSI pin is displayed as a HEX formatted value, the byte sniffed on the MISO pin is inside the ().

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