Sample Program 3 For The 8/10-Bit A/D Converter (Stop Conversion Mode Using Ei Os) - Fujitsu MB90460 Series Hardware Manual

CHAPTER 20 8/10-BIT A/D CONVERTER
20.10 Sample Program 3 for the 8/10-bit A/D Converter
(Stop Conversion Mode Using EI
This section contains a sample program for A/D conversion in stop conversion mode
2
using EI OS.
■ Sample Program for Stop Conversion Mode using EI
●
Processing
• Analog input AN3 is converted 12 times at regular intervals.
• The conversion data is sequentially transferred to addresses 600
• A resolution of 10 bits is selected.
• The conversion is activated by 16-bit reload timer 1.
Figure 20.10-1 shows a flowchart of the program using EI
Figure 20.10-1 Flowchart of Program using EI
Start conversion
●
Coding example
BAPL
BAPM
BAPH
ISCS
IOAL
IOAH
DCTL
DCTH
DDR5
ADER
ICR00
ADCS0
ADCS1
ADCR0
ADCR1
TMCSRL1
TMCSRH1
568
AN3 → Interrupt → EI
Stop
Activation by 16-bit reload timer 1
EQU 000100H
EQU 000101H
EQU 000102H
EQU 000103H
EQU 000104H
EQU 000105H
EQU 000106H
EQU 000107H
EQU 000015H
EQU 000017H
EQU 0000B0H
EQU 000034H
EQU 000035H
EQU 000036H
EQU 000037H
EQU 000086H
EQU 000087H
2
OS)
2
OS
to 617
H
2
OS (stop conversion mode).
2
OS (Stop Conversion Mode)
2
OS transfer
;Lower buffer address pointer
;Middle buffer address pointer
;Upper buffer address pointer
2
;EI OS status register
;Lower I/O address register
;Upper I/O address register
;Lower data counter
;Upper data counter
;Port 5 direction register
;Analog input enable register
;Interrupt control register for A/DC
;A/D control status register
;
;A/D data register
;
;Lower control status register 1
;
.
H
After 12 transfers
Interrupt sequence
End