DE4 User Manual
142
www.terasic.com
June 20, 2018
Power on the DE4 board.
Connect USB Blaster to the DE4 board and install USB Blaster driver if necessary.
Execute the demo batch file “
test.bat
” under the batch file folder,
DE4_EXT_PLL\demo_batch
Press Button0 or Button1 for the write and read operations respectively on the
EXT_CTRL_PLL demonstration.
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The Power Measurement demonstration illustrates how to measure the DE4 power consumption
based on the built-in power measure circuit. The power measurement is implemented using two
multi-channel differential 24-bit Linear Technology LT2418 delta-sigma analog-to-digital
converters (ADC) with sense resistors to measure the small voltage drop across the resistors. The
ADCs is connected to the FPGA via serial peripheral interface (SPI) bus.
This demonstration uses an embedded NIOS II processor to read the voltage drop value from the
ADC through the SPI interface. Based on the voltage drop values and sense resistors, the program
can calculate the associated current and power consumption. The relative information is populated
on the NIOS-Terminal and is updated every two seconds.
System Block Diagram
Figure 5–29
shows the system block diagram of this demonstration which is designed based on
SOPC Builder requiring a 50 MHz clock provided by the board. In the SOPC builder, all the
components are designed to run on a 50 MHZ clock. The NIOS program is run on a on-chip
memory. The PIO Controllers are used to implement SPI protocol where the SPI signal is directly
toggled by the Nios II.
Содержание ALTERA DE4
Страница 1: ...DE4 User Manual 1 www terasic com June 20 2018 ...
Страница 54: ...DE4 User Manual 54 www terasic com June 20 2018 ...
Страница 73: ...DE4 User Manual 73 www terasic com June 20 2018 11 VCC3P3_HSMC 3 3 V HSMC power HSMC ports A and B ...
Страница 83: ...DE4 User Manual 83 www terasic com June 20 2018 Figure 3 8 Access DDR2 SO DIMM memory ...
Страница 92: ...DE4 User Manual 92 www terasic com June 20 2018 Figure 3 17 Fan Control of the DE4 ...
Страница 110: ...DE4 User Manual 110 www terasic com June 20 2018 Figure 5 3 Software workflow of the USB Host demonstration ...
Страница 150: ...DE4 User Manual 150 www terasic com June 20 2018 Figure 5 35 SOPC builder ...