X-Git-Url: http://sigrok.org/gitweb/?p=sigrok-dumps.git;a=blobdiff_plain;f=spi%2Fenc28j60%2FREADME;fp=spi%2Fenc28j60%2FREADME;h=47d0415262eaa6fe7438476ac561be55bc870dfd;hp=0000000000000000000000000000000000000000;hb=8a05fd71d8881f3d898ff9bfac8867516f07ecad;hpb=c7692e182af6f603db6511ebae5109723cab42f1 diff --git a/spi/enc28j60/README b/spi/enc28j60/README new file mode 100644 index 0000000..47d0415 --- /dev/null +++ b/spi/enc28j60/README @@ -0,0 +1,35 @@ +------------------------------------------------------------------------------- +Microchip ENC28J60 +------------------------------------------------------------------------------- + +This is an example capture of the Microchip ENC28J60 SPI Ethernet chip. + +Details: +http://ww1.microchip.com/downloads/en/DeviceDoc/39662e.pdf + + +enc28j60-init-and-ping.sr +------------------------- + +Capture contains the following 3 stages: + +1) Initialization phase where control registers are written. +2) Polling phase that waits for the Ethernet link to be up. +3) Two round-trips of ping packets (each consists of 1 RX of ICMP Echo Request + packet and 1 TX of ICMP Echo Reply packet). + +The chip was driven by a custom STM32F446 board running custom bare-metal +firmware. + + +Logic analyzer setup +-------------------- + +The logic analyzer used was a DSLogic Plus (at 50MHz, with SPI clock at 16MHz): + + Probe ENC28J60 + -------------------- + 0 CS# + 1 MISO + 2 CLK + 3 MOSI