Sample Program 1 For 8-/10-Bit A/D Converter (Ei Os Start In Single-Shot Mode); Fig. 19.12 Flow Of Ei Os Start Program (Single-Shot Mode) - Fujitsu MB90420/5 (A) Series Hardware Manual

19.8 Sample Program 1 for 8-/10-bit A/D Converter (EI
Sample program for A/D conversion by starting EI
n Sample program for starting EI
• Processing specification
– Analog inputs AN1 to AN3 converted
– Converted data sequentially transferred to addresses 200
– 10-bit resolution
– Software start
Figure 19.12 shows the flow of an EI
• Coding sample
BAPL EQU
BAPM EQU
BAPH EQU
ISCS EQU
IOAL EQU
IOAH EQU
DCTL EQU
DCTH EQU
DDR6 EQU
ADER EQU
ICR10 EQU
ADCSL EQU
ADCSH EQU
ADCRL EQU
ADCRH EQU
;----------Main program------------------------------------------------------
------
CODE CSEG
START
AND
MOV
8-/10-BIT A/D CONVERTER
2
OS in single-shot mode
2
OS start program (single-shot mode).
AN1
Start
AN2
AN3
End
2
Fig. 19.12 Flow of EI
; Buffer address pointer lower
000100
H
; Buffer address pointer middle order
000101
H
; Buffer address pointer upper
000102
H
2
; EI OS Status register
000103
H
; I/O Address register low order
000104
H
; I/O Address register high order
000105
H
; Data counter low order
000106
H
; Data counter high order
000107
H
; Port-6 direction register
000016
H
; Analog input enable register
00001A
H
; A/D Converter interrupt control register
0000BA
H
; A/D Control status register
000020
H
000021 ;
H
; A/D Data register
000022
H
000023 ;
H
CCR, #0BF
H
ICR10, #00
H
2
OS in the single-shot mode is shown below:
to 205
H
EI
Interrupt
EI
Interrupt
Interrupt
EI
Interrupt sequence
Concurrent
processing
OS Start Program (Single-shot Mode)
; Stack pointer (SP), etc., already initialized
; Interrupts disabled
; Interrupt level = 0 (highest level)
19-23
2
OS Start in Single-shot Mode)
H
2
OS transfer
2
OS transfer
2
OS transfer