Altera DE1-SoC - ADC Reading Demonstration

DE1-SoC User Manual
82
www.terasic.com
March 14, 2014
 Point the IR receiver with the remote and press any button
 Observe the six HEXs according to Table 5-6
Table 5-6 Detailed Information of the Indicators
Indicator Name
Description
HEX5
Inversed high byte of DATA(Key Code)
HEX4
Inversed low byte of DATA(Key Code)
HEX3
High byte of ADDRESS(Custom Code)
HEX2
Low byte of ADDRESS(Custom Code)
HEX1
High byte of DATA(Key Code)
HEX0
Low byte of DATA (Key Code)
5
5
.
.
9
9
A
A
D
D
C
C
R
R
e
e
a
a
d
d
i
i
n
n
g
g
This demonstration illustrates steps to evaluate the performance of the 8-channel 12-bit A/D
Converter ADC7928. The DC 5.0V on the 2x5 header is used to drive the analog signals by a
trimmer potentiometer. The voltage can be adjusted within the range between 0 and 5.0V. The 12-bit
voltage measurement is displayed on the NIOS II console. Figure 5-19 shows the block diagram of
this demonstration.
If the input voltage is -2.5V ~ 2.5V, a pre-scale circuit can be used to adjust it to 0 ~ 5V.
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