Altera DE1-SoC - Testing the I2 C Multiplexer for HPS Access

DE1-SoC User Manual
96
www.terasic.com
March 14, 2014
 Demonstration Setup
 Connect a USB cable to the USB-to-UART connector (J4) on the DE1-SoC board and
the host PC.
 Copy the executable file "gsensor" into the microSD card under the "/home/root"
folder in Linux.
 Insert the booting microSD card into the DE1-SoC board.
 Power on the DE1-SoC board.
 Launch PuTTY to establish connection to the UART port of DE1-SoC board. Type
"root" to login Yocto Linux.
 Execute "./gsensor" in the UART terminal of PuTTY to start the G-sensor polling.
 The demo program will show the X, Y, and Z values in the PuTTY, as shown in Figure
6-8.
Figure 6-8 Terminal output of the G-sensor demonstration
 Press "CTRL + C" to terminate the program.
6
6
.
.
4
4
I
I
2
2
C
C
M
M
U
U
X
X
T
T
e
e
s
s
t
t
The I2C bus on DE1-SoC is originally accessed by FPGA only. This demonstration shows how to
switch the I2C multiplexer for HPS to access the I2C bus.
 Function Block Diagram
Figure 6-9 shows the function block diagram of this demonstration. The I2C bus from both FPGA
and HPS are connected to an I2C multiplexer. It is controlled by HPS_I2C_CONTROL, which is
connected to the GPIO1 controller in HPS. The HPS I2C is connected to the I2C0 controller in
HPS, as well as the G-sensor.
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.