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用汇编把ADC值转换为温度值的查表程序,求大神帮忙
2019-03-25 19:16
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PIC单片机
12903
9
1683
已经显示出ADC的值,但是不会根据公式写查表程序转换为温度值,求坛子里的各路大神帮帮忙,感激不尽 此帖出自
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9条回答
xuyiyi
1楼-- · 2019-03-26 18:43
跟51的完全不一样,PIC单片机没有专用的查表指令。
一般都是用RETLW指令来做查表,思路是利用子程序带值返回的这一方式来实现。
具体是在主程序中先取出表数据地址放入W,接着调用子程序,子程序的第一条指令将W置入PC,则程序跳到数据地址的地方,再由“RETLW”指令将数据返回到主程序。
ORG 0100H
BIAO: ADDWF PCL,F
RETLW 数据1
RETLW 数据2
RETLW 数据3
……
RETLW 数据n
加载中...
xuyiyi
2楼-- · 2019-03-26 20:49
PIC16F系列单片机读大表子程序
list P=16f876a, st=off
errorlevel -302, -306
#include <p16f876a.inc>
__CONFIG _CP_OFF & _WDT_OFF & _BODEN_OFF & _PWRTE_OFF & _HS_OSC & _LVP_OFF & _CPD_ON
GETDATA equ 0x20
USERDAT equ 0x21
DISADDR equ 0x30
;---------------------------------
org 0x0
goto PICSTART
org 0xF
PICSTART clrf DISADDR
movlw 0xFF ; 预读内容(0x00~0xFF)
movwf GETDATA ; W->GETDATA
; ...............
;--------------------------------------------------------------------
READTAB movf GETDATA,W ; 预读内容指针低8位
movwf USERDAT ; W->USERDAT
clrf USERDAT+1 ; 清高8位指针
pagesel SERVICE ; 确认页设置
call SERVICE ; 调用查表子程序
pagesel $ ; 返回当前页
movwf DISADDR ; 内容->DISADDR
goto $ ; 结束
;---------------------------------
; PIC单片机读大表子程序
org 0x1EE0 ; 存放起地址
SERVICE movlw LOW(DTABLE) ; 表格实际地址低8位
addwf USERDAT,F ; 计算低位字节
btfsc STATUS,C ; 进位?
incf USERDAT+1,F ; 是,高位加1
movlw HIGH(DTABLE) ; 表格实际地址高8位
addwf USERDAT+1,W ; 计算高位字节->W
movwf PCLATH ; 修改PC位值
movf USERDAT,W ; 地址低8位->W
movwf PCL ; 改变PCL指针
DTABLE DT 0x88,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
DT 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
DT 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
DT 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
DT 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
DT 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
DT 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
DT 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
DT 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
DT 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
DT 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
DT 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
DT 0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf
DT 0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf
DT 0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef
DT 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0x99
;------------------------------------------------------------------------------------------------
end
加载中...
lewis1206
3楼-- · 2019-03-26 22:59
非常感谢
加载中...
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一般都是用RETLW指令来做查表,思路是利用子程序带值返回的这一方式来实现。
具体是在主程序中先取出表数据地址放入W,接着调用子程序,子程序的第一条指令将W置入PC,则程序跳到数据地址的地方,再由“RETLW”指令将数据返回到主程序。
ORG 0100H
BIAO: ADDWF PCL,F
RETLW 数据1
RETLW 数据2
RETLW 数据3
……
RETLW 数据n
list P=16f876a, st=off
errorlevel -302, -306
#include <p16f876a.inc>
__CONFIG _CP_OFF & _WDT_OFF & _BODEN_OFF & _PWRTE_OFF & _HS_OSC & _LVP_OFF & _CPD_ON
GETDATA equ 0x20
USERDAT equ 0x21
DISADDR equ 0x30
;---------------------------------
org 0x0
goto PICSTART
org 0xF
PICSTART clrf DISADDR
movlw 0xFF ; 预读内容(0x00~0xFF)
movwf GETDATA ; W->GETDATA
; ...............
;--------------------------------------------------------------------
READTAB movf GETDATA,W ; 预读内容指针低8位
movwf USERDAT ; W->USERDAT
clrf USERDAT+1 ; 清高8位指针
pagesel SERVICE ; 确认页设置
call SERVICE ; 调用查表子程序
pagesel $ ; 返回当前页
movwf DISADDR ; 内容->DISADDR
goto $ ; 结束
;---------------------------------
; PIC单片机读大表子程序
org 0x1EE0 ; 存放起地址
SERVICE movlw LOW(DTABLE) ; 表格实际地址低8位
addwf USERDAT,F ; 计算低位字节
btfsc STATUS,C ; 进位?
incf USERDAT+1,F ; 是,高位加1
movlw HIGH(DTABLE) ; 表格实际地址高8位
addwf USERDAT+1,W ; 计算高位字节->W
movwf PCLATH ; 修改PC位值
movf USERDAT,W ; 地址低8位->W
movwf PCL ; 改变PCL指针
DTABLE DT 0x88,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
DT 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
DT 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
DT 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
DT 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
DT 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
DT 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
DT 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
DT 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
DT 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
DT 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
DT 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
DT 0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf
DT 0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf
DT 0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef
DT 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0x99
;------------------------------------------------------------------------------------------------
end
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