24位AD转换芯片

ID:126173 · 发表于 2016-6-12 00:16

那位高人有24位AD芯片，如ADI家的AD7710 AD7794 。LTC家的LTC2400 LTC2440 或是TI家的，等等随便什么公司的，24位以上，高精度AD芯片，汇编语言程序，给在下参考。

ID:126314 · 发表于 2016-6-12 09:55

帮你顶一下同求

ID:126173 · 发表于 2016-6-12 17:14

51系读AD7710
Table VII. 8XC51 Code for Reading from the AD7710
MOV SCON,#00010001B; Configure 8051 for MODE 0 Operation
MOV IE,#00010000B; Disable All Interrupts
SETB 90H; Set P1.0, Used as RFS
SETB 91H; Set P1.1, Used as TFS
SETB 93H; Set P1.3, Used as A0
MOV R1,#003H; Sets Number of Bytes to Be Read in
A Read Operation
MOV R0,#030H; Start Address for Where Bytes Will
Be Loaded
MOV R6,#004H; Use P1.2 as DRDY
WAIT:
NOP;
MOV A,P1; Read Port 1
ANL A,R6; Mask Out All Bits Except DRDY
JZ READ; If Zero Read
SJMP WAIT; Otherwise Keep Polling
READ:
CLR 90H; Bring RFS Low
CLR 98H; Clear Receive Flag
POLL:
JB 98H, READ1 Tests Receive Interrupt Flag
SJMP POLL
READ 1:
MOV A,SBUF; Read Buffer
RLC A; Rearrange Data
MOV B.0,C; Reverse Order of Bits
  RLC A; MOV B.1,C; RLC A; MOV B.2,C;
  RLC A; MOV B.3,C; RLC A; MOV B.4,C;
  RLC A; MOV B.5,C; RLC A; MOV B.6,C;
  RLC A; MOV B.7,C;
  MOV A,B;
  MOV @R0,A; Write Data to Memory
  INC R0; Increment Memory Location
  DEC R1 Decrement Byte Counter
  MOV A,R1
  JZ END Jump if Zero
  JMP WAIT Fetch Next Byte
END:
SETB 90H Bring RFS High
FIN:
SJMP FIN

ID:126173 · 发表于 2016-6-12 17:14

51系写AD7710
Table VIII. 8XC51 Code for Writing to the AD7710
MOV SCON,#00000000B; Configure 8051 for MODE 0
Operation & Enable Serial Reception
MOV IE,#10010000B; Enable Transmit Interrupt
MOV IP,#00010000B; Prioritize the Transmit Interrupt
SETB 91H; Bring TFS High
SETB 90H; Bring TFS High
MOV R1,#003H; Sets Number of Bytes to Be Written
in a Write Operation
MOV R0,#030H; Start Address in RAM for Bytes
MOV A,#00H; Clear Accumulator
MOV SBUF,A; Initialize the Serial Port
WAIT:
JMP WAIT; Wait for Interrupt
INT ROUTINE:
NOP; Interrupt Subroutine
MOV A,R1; Load R1 to Accumulator
JZ FIN; If Zero Jump to FIN
DEC R1; Decrement R1 Byte Counter
MOV A,@R; Move Byte into the Accumulator
INC R0; Increment Address
RLC A; Rearrange Data—From LSB First
to MSB First
MOV B.0,C; RLC A; MOV B.1,C; RLC A;
MOV B.2,C; RLC A; MOV B.3,C; RLC A;
MOV B.4,C; RLC A; MOV B.5,C; RLC A;
MOV B.6,C; RLC A: MOV B.7,C; MOV A,B;
CLR 93H; Bring A0 Low
CLR 91H; Bring TFS Low
MOV SBUF,A; Write to Serial Port
RETI; Return from Subroutine
FIN:
SETB 91H; Set TFS High
SETB 93H; Set A0 High
RETI; Return from Interrupt Subroutine

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