using fwrite instruction in matlab

[anasfuad33eng]

hi, all when i use these codes in matlab
s=serial('com3','baudrate',9600);
fopen(s)
fwrite(s,00000001,'int8')
8051 receive the value but when display it on led the output 01100000 why this ocurr what is the wrong ?please help:-(

 

[jayanth.devarayanadurga]

Is fOpen and fWrite functions for serial communication or file open and file write?

 

[anasfuad33eng]

Is fOpen and fWrite functions for serial communication or file open and file write?

from matlab help fwrite(s,00000001,'int8') will send binary data (00000001) through serial port my question why when 8051 receive this value display it 01100000 what is the error?

 

[jayanth.devarayanadurga]

does matlab send data 1 bit at a time or does it send 1 byte at a time? Can you please post your 8051 code? I will check it.

 

[anasfuad33eng]

org 2000h
mov tmod,#20h
mov th1,#0fah
mov scon,#50h
setb tr1
here:jnb ri,here
mov a,sbuf
mov p1,a
clr ri
sjmp here
end

 

[jayanth.devarayanadurga]

You want to receive data through UART and then assign that data to P1. Right? Why are you using Timer1? You should use Serial Interrupt to receive data from matlab.

try this

---

Code ASM - [expand]
1
2
3
4
5
6
7
8
9
mov tmod, #20h
mov th1, #-3
mov scon, #50h
setb tr1
clr ri
rpt:    jnb ri, rpt
        mov A, sbuf
        mov P1, A
        end

---

 

[anasfuad33eng]

You want to receive data through UART and then assign that data to P1. Right? Why are you using Timer1? You should use Serial Interrupt to receive data from matlab.

try this

---

Code ASM - [expand]
1
2
3
4
5
6
7
8
9
mov tmod, #20h
mov th1, #-3
mov scon, #50h
setb tr1
clr ri
rpt:    jnb ri, rpt
        mov A, sbuf
        mov P1, A
        end

---

but sir your code give error at line7 :to0 many operands why?please help

 

[jayanth.devarayanadurga]

Try this link https://www.8051projects.net/serial-communication/serial-programming.php

 

[anasfuad33eng]

Serial_Init:
;Set timer 1 mode to 8-bit Auto-Reload
mov TMOD,#20H
;Enable reception
;Set Serial port mode to 8-bit UART
mov SCON,#50H
;Set baudrate to 9600 at 11.0592MHz
mov TH1,#0FDH
mov TL1,#0FDH
;Start Timer
setb TR1
ret
in this site he move to both th1 and tl1 0fd why??????

- - - Updated - - -

in this site he move to both th1 and tl1 0fd why??????
the program from site
Serial_Init:
;Set timer 1 mode to 8-bit Auto-Reload
mov TMOD,#20H
;Enable reception
;Set Serial port mode to 8-bit UART
mov SCON,#50H
;Set baudrate to 9600 at 11.0592MHz
mov TH1,#0FDH
mov TL1,#0FDH
;Start Timer
setb TR1
ret