i am a noob and learning 8051 coding. i want to know how can i use PWM to write a speaker which can emit diff sound (do,re,mi,etc.) by using 2 pins only. thanks.
Start Here:
www.8052.com/.../120112 - links to see the so-called "bible" for the 8051
See also: http://www.8052.com/tutorial
And: http://www.keil.com/books/8051books.asp
And, of course, the Datasheet and the Manufacturer's website for the particular chip that you are using...
can you provide a example code for me please?
HI.
here is start. make sound with p1.0. u must improv
call using sound(int Cycles, char delay); sound: mov dph,r6 mov dpl,r7 loop: cpl p1.0 mov a,r5 mov r2,a djnz R2,$ clr P1.0 mov r2,#10 djnz R2,$ inc dptr mov a,dpl mov b,dph jnz loop ret
Always yo're freind.
Zeusti.
sorry but got last a bit wrong :(
sound(int Cycles, char delay); sound: mov dph,r6 mov dpl,r7 loop: cpl p1.0 mov a,r5 mov r2,a djnz R2,$ inc dptr mov a,dpl mov b,dph jnz loop ret
thanks you very much, i also want to ask how to connect the speaker to the 8051? +ve to the p1.0, and the -ve to the gnd? any other components needed?
if u use a (example 8 ohm) speeker u will need a drivor, ieg a transistor and stuff.
u can use a piezo. won pin on p1.0 and won on ov.
sound(int Cycles, char delay); this isn't asm code, how to call this function? or is it useful for the prog.?
u r write. it is a prototype for the asm function. u put in c and call in c.
Zeusti
who can, even in their wildes imagination, believe that a noob will, in any minuscule way, understand uncommented scribbles?
Erik
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