Sample Program 2 For The 8/10-Bit A/D Converter (Continuous Conversion Mode Using Ei 2 Os) - Fujitsu MB90460 Series Hardware Manual

CHAPTER 20 8/10-BIT A/D CONVERTER
20.9 Sample Program 2 for the 8/10-bit A/D Converter
(Continuous Conversion Mode Using EI
This section contains a sample program for A/D conversion in continuous conversion
2
mode using EI OS.
■ Sample Program for Continuous Conversion Mode using EI
●
Processing
• Analog inputs AN3 to AN5 are converted twice. Two conversion data items are obtained for each
channel.
• 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 20.9-1 shows a flowchart of the program using EI
Figure 20.9-1 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
TMRD1
;-------Main program------------------------------------------------------------------------------------------------
CODE
566
AN3 → Interrupt → EI
AN4 → Interrupt → EI
AN5 → Interrupt → EI
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
EQU 000088H
CSEG
2
2
OS
to 60B
H
2
OS (continuous conversion mode).
2
OS (Continuous Conversion Mode)
2
OS transfer
2
OS transfer
Interrupt sequence
2
OS transfer
End
;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
;
;16-bit reload register 1
OS)
.
H
After six transfers