Digital IncrEncoder Rev02#

../../../../_images/incr_encoder_rev02_pcb.jpg

Functionality#

Connects three incremental encoder FPGA
Provides isolated 5V supply to encoder
Reads differential signals from encoder

Pinout (exemplary for Encoder 1)#

Pin	D-Sub 9	FPGA	Kubrich Encoder
0+	3	Dig_14_Ch5	blue
0-	4		red
A+	8	Dig_13_Ch5	green
A-	7		yellow
B+	5	Dig_12_Ch5	grey
B-	9		pink
Vcc	2		brown
GND	1		white

Program CPLDs with firmware, see Programming the CPLD for details

Known issues#

Rev 02: Twisted labels for Encoder signals. In the schematic definition the labels are incorrectly assigned.

../../../../_images/wrong_labeled_schematic.png

To use the Rev02 encoder card, the Constraint file Digital_AdapterBoard_D5 in vivado project has to be changed.

Pin configuration#

Package PIN D5	Port	Signal
E14	Dig_20_Ch5	Encoder_3_I
J15	Dig_19_Ch5	Encoder_3_A
A13	Dig_18_Ch5	Encoder_3_B
K15	Dig_17_Ch5	Encoder_2_I
B13	Dig_16_Ch5	Encoder_2_A
G14	Dig_15_Ch5	Encoder_2_B
A14	Dig_14_Ch5	Encoder_1_I
G15	Dig_13_Ch5	Encoder_1_A
B14	Dig_12_Ch5	Encoder_1_B

Example constraint file for te0808

Vivado block design with three IP-Cores on D5#

Fo using all channels of the card, the user has to change the block design in vivado (three IP-Cores on D5 connected).

../../../../_images/vivado_block.jpg

Compatibility#

Slots D1 to D5 can be used without limitations, D5 is suggested.
Block design in vivado has to be adapted with three IP-Cores for reading out.

See also#

Designed by#

Michaela Hlatky (THN) in 02/2022