共3条
1/1 1 跳转至页
LPM,FF,LPM,51,MOVC 为什么我用LPM读表格数据总是返回FF?LPM是不是和51中的MOVC同?
问
.include "m8def.inc"
.def u_sr =r15 ;Status-register storage
.def temp =r16 ; Define temporary variable
.def TIME_H =r17 ; Define timer variable high 8 bits
.def TIME_L =r18 ; Define timer variable low 8 bits
.cseg
.org $0000
rjmp RESET ;Reset handle
.org OVF0addr
rjmp tim0_ovf ;Timer0 overflow handler
tim0_ovf:
reti
RESET: ldi temp,low(RAMEND)
out SPL,temp ; Set stack pointer to last internal RAM location
ldi temp,high(RAMEND)
out SPH,temp
ldi temp,0
out DDRC,temp
sbi DDRB,DDB5 ; except PD4 -> output with 1's
ldi temp,1<<TOIE0 ;Set bit 1 in u_tmp
out TIFR,temp ; to clear T/C0 overflow flag
out TIMSK,temp ; and enable T/C0 overflow interrupt
out TCNT0,temp ;Set timer reload-value (1 bit)
sei
loop:
in temp,PINC
lsl temp
ldi ZH,0x04 ; Load high part of byte address into ZH
ldi ZL,0x00 ; Load low part of byte address into ZL
;ldi ZH,high(2*table) ; Load high part of byte address into ZH
;ldi ZL,low(2*table) ; Load low part of byte address into ZL
lpm
mov TIME_H,r0
inc ZL
lpm
mov TIME_L,r0
rjmp loop
.eseg
.org 0x400
;table:
.db 89 ;'Y'
.db 111 ;'o'
.db 117 ;'u'
.db 32 ;' '
.db 116 ;'t'
.db 121 ;'y'
.db 112 ;'p'
.db 101 ;'e'
.db 100 ;'d'
.db 32 ;' '
.db 13 ;<CR>
.db 10 ;<LF>
答 1: 唉,地址忘记乘2了,郁闷
.def u_sr =r15 ;Status-register storage
.def temp =r16 ; Define temporary variable
.def TIME_H =r17 ; Define timer variable high 8 bits
.def TIME_L =r18 ; Define timer variable low 8 bits
.cseg
.org $0000
rjmp RESET ;Reset handle
.org OVF0addr
rjmp tim0_ovf ;Timer0 overflow handler
tim0_ovf:
reti
RESET: ldi temp,low(RAMEND)
out SPL,temp ; Set stack pointer to last internal RAM location
ldi temp,high(RAMEND)
out SPH,temp
ldi temp,0
out DDRC,temp
sbi DDRB,DDB5 ; except PD4 -> output with 1's
ldi temp,1<<TOIE0 ;Set bit 1 in u_tmp
out TIFR,temp ; to clear T/C0 overflow flag
out TIMSK,temp ; and enable T/C0 overflow interrupt
out TCNT0,temp ;Set timer reload-value (1 bit)
sei
loop:
in temp,PINC
lsl temp
ldi ZH,0x04 ; Load high part of byte address into ZH
ldi ZL,0x00 ; Load low part of byte address into ZL
;ldi ZH,high(2*table) ; Load high part of byte address into ZH
;ldi ZL,low(2*table) ; Load low part of byte address into ZL
lpm
mov TIME_H,r0
inc ZL
lpm
mov TIME_L,r0
rjmp loop
.eseg
.org 0x400
;table:
.db 89 ;'Y'
.db 111 ;'o'
.db 117 ;'u'
.db 32 ;' '
.db 116 ;'t'
.db 121 ;'y'
.db 112 ;'p'
.db 101 ;'e'
.db 100 ;'d'
.db 32 ;' '
.db 13 ;<CR>
.db 10 ;<LF>
答 1: 唉,地址忘记乘2了,郁闷
共3条
1/1 1 跳转至页
回复
有奖活动 | |
---|---|
【有奖活动】智能可穿戴设备AR/VR如何引领科技新潮流! | |
奖!发布技术笔记,技术评测贴换取您心仪的礼品 | |
【有奖活动】震撼来袭!这场直播将直击工程师的心灵! | |
“我想要一部加热台”活动,不花钱赢取开发好工具!活动开始了哦 | |
【有奖活动】伙伴们:您的“需求”解决了吗? |
打赏帖 | |
---|---|
【换取手持数字示波器】AHT10温度检测分享被打赏40分 | |
【换取手持数字示波器】ACM32F070开发板点亮LCD屏和触控按键,串口,ADC被打赏40分 | |
【换取手持数字示波器】ACM32F070LCD屏和触控按键功驱动蜂鸣器分享被打赏40分 | |
【换取手持数字示波器】国民技术PWM功能知识分享被打赏40分 | |
【换取手持数字示波器】放大器运放知识分享被打赏40分 | |
【分享评测,赢取加热台】+开关电源AC输入知识分享被打赏30分 | |
【换取手持数字示波器】N32G430点亮数码管与串口打印、ADC被打赏40分 | |
老胖子聊电路--分析一个反馈电路被打赏50分 | |
【换取手持数字示波器】+点亮WS2812RGB灯被打赏50分 | |
【换取手持数字示波器】+线性调整器理论知识分享被打赏40分 |