Controlling SS963 with spi-tool on Raspberry Pi

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#spi-tool v1.0 ##SS963 Serial Power Driver Card Testing Utility and Generic SPI Testing Tool

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License.

This program uses wiringPi library from wiringpi.com.
First you must install it: http://wiringpi.com/download-and-install/

And enable SPI port with raspi-config tool then you can compile the spi-tool as below:

gcc spi-tool.c -lwiringPi -o spi-tool -Ofast -s

To see supported parameters use -h:

./spi-tool -h

Usage: ./spi-tool [-DstScrpdblHOLC3h]
  -D --device   device to use (default /dev/spidev0.0)
  -s --speed    max speed (Hz)
  -t --transmit hex coded decimal bytes
  -S --SS963      using SS963 Serial Driver Card. Set ^reset and apply latch signal.
  -c --latch    latch pin GPIO number (specic for SS963). Default 2
  -r --reset    reset pin GPIO number (specic for SS963). Default 3
  -p --ldelay   latch delay as micro seconds (specic for SS963). Default 50uS
  -d --delay    delay (usec)
  -b --bpw      bits per word
  -l --loop     loopback
  -H --cpha     clock phase
  -O --cpol     clock polarity
  -L --lsb      least significant bit first
  -C --cs-high  chip select active high
  -3 --3wire    SI/SO signals shared
  -N --nocs     Set SPI mode to SPI_NO_CS
  -R --ready    Set SPI mode to SPI_READY
  -h --help     prints help

Development environment specifics:

Tested on Raspberry Pi V3 hardware, running Raspbian (4.4.38-v7+)
Building with gcc version 4.9.2 (Raspbian 4.9.2-10)

Example-1:

Transmits 5 byte (40bits) data (0xFF,0xFE,0xFD,0xFC,0xFF) to SPI.0 at 500KHz. The tx data consist of hexadecimal coded bytes stream as below. Also in this tutorial receiver device SS963 dont reply back any data as seen in RX section (00 00 00 00 00). Attention this could means MISO terminal is not connected.

./spi-tool -s 500000 -t 0xFF,0xFE,0xFD,0xFC,0xFF

SPI mode       : 0
Bits per word  : 8
Max speed      : 500000 Hz (500 KHz)

TX:
FF FE FD FC FF

RX:
00 00 00 00 00

Example-2:

In this tutorial we use SS963 Serial Power Driver from izlencebilisim.com. Because of this we add -S parameter (SS963) and use -crp parameters to drive SS963 card with 96bit. Connection diagram provided in "example-2-connection-diagram.png" below. Check this:

sudo ./spi-tool -c 3 -r 2 -p 1000 --SS963 -t 0xAA,0xAA,0xAA,0xAA,0xAA,0xAA

SPI mode       : 0
Bits per word  : 8
Max speed      : 500000 Hz (500 KHz)

Using SS963 Serial Driver Card...
Latch Pin   : 3
^Reset Pin  : 2
Latch Delay : 1000

TX:
AA AA AA AA AA AA

RX:
00 00 00 00 00 00

In this example we want to take your attention to a few important things as relevant using of SS963 Serial Power Driver. First you must add sudo command to beginning of command because of the wiringPi functions which do latch coudlnt runs in user space rights. SS963 uses latch and reset functionalities. To clear (reset) all outputs set it to logical "0" because of it is active low. After all bits transmitted to SS963 registers to write all registers to own outputs Lacth is required. Whe you add -S or --SS963 parameters the latch signal will automaticly send after the data transmission was completed. Parameter -p (l-delay) sets period of latch signal. For using of parameters please check tool's usage list with -h parameter. Examples 2 logic analyzer output is as seen as below:

See the tutorial video

Go to our github page.

İZLENCE BILIŞIM