The spidriver from gr3yr0n1n

spidriver's Introduction

SPIDriver is a tool for controlling any SPI device from your PC's USB port. It connects as a standard USB serial device, so there are no drivers to install. The serial protocol is very simple, and there are included drivers for

Windows/Mac/Linux GUI
Windows/Mac/Linux command-line
Python 2 and 3
Windows/Mac/Linux C/C++

Features:

live display shows you exactly what it's doing all the time
sustained SPI transfers at 500 Kbps
USB line voltage monitor to detect supply problems
target device current measurement
two auxiliary control lines, A and B
dedicated power out lines. 2 each of GND, 3.3 V and 5 V. Up to 500 mA total
signals color coded to match jumper colors
all signals are 3.3 V, and are 5 V tolerant
uses an FTDI USB serial adapter, and Silicon Labs automotive-grade microcontroller
also reports uptime, temperature and running CRC of all traffic
all sensors and signals controlled over serial

For example to read the 3-byte ID from this serial flash in Python:

>>> s = SpiDriver()
>>> s.sel()               # start command
>>> s.write(b'\x9f')      # command 9F is READ JEDEC ID 
>>> list(s.read(3))       # read next 3 bytes
[239, 64, 24]
>>> s.unsel()             # end command
>>>

or using the command line:

$ spi s t 0x9f r 3 u
0xef,0x40,0x18
$

Command-line tool

You can build the command-line tool like this:

$ cd c
$ make -f linux/Makefile 
mkdir -p build/
cc -o build/spi  -I common linux/spi.c common/spidriver.c
$ ./build/spi -h
Bad command '-h'

Commands are:
  i     display status information (uptime, voltage, current, temperature)
  s     SPI select
  u     SPI unselect
  w     write bytes to SPI
  r N   read N bytes from SPI
  a 0/1 Set A line
  b 0/1 Set B line

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