HELP Wit 74LV8153N Shitft register , can't get the thing working

Igor_Rast

hi there , for some time now im playing around with a propeller ,
now im trying to get this 74lv8153 that I already have to work with the prop

im not so good with the prop and can't seem to find any good explination to get it to work
. my pins are conectend like

1- 5v
2-ground
3--ground
4-ground
5-datapin conecte to p.1
6-low
7-ground
8-ground
9
10-ground

11-ground
12-19 led's
20 5v

the program

CON

_clkmode = xtal1 + pll16x
_xinfreq = 5_000_000

RS = 1 {lcd control}
RW = 2 {lcd control}
E = 3 {lcd control}
DBLow = 4 {lcd control}
DBHigh = 7 {lcd control}


OBJ

SPI : "SPI_Spin"


PUB main |mount,RESET,ClockDelay,ClockState,Celsius

dira[8]:=1

SPI.start(50,8000)



repeat
SPI.SHIFTOUT(17, 18, SPI#MSBFIRST , 10, 0100011011) '' Request Configuration Write
SPI.SHIFTOUT(17, 17, SPI#MSBFIRST , 10, 0100010011) '' configure for ; CPU / Free-run mode
'' release the DS1620

waitcnt(cnt+clkfreq*10/1000) '' Pause for 10ms
!outa[8]
waitcnt(cnt + clkfreq)
PUB HIGH(Pin)
dira[Pin]~~
outa[Pin]~~

PUB LOW(Pin)
dira[Pin]~~
outa[Pin]~


i got a led at p8 just to see if ther's activity


question , i don't know if there is shomething wrong with the code so the prop sends the wrong signal , ORRRRR

the shift register is not wired properly

i wired the adress lines to ground to get 000 . that good right ?

hope to get some rely so I can get this working

igor

Leon

It appears to have an async serial input, like a UART. You won't get anywhere using SPI with it.

Igor_Rast

ok, I only know it's supose to get the data via 1 line , self syn or somthing,

01 start bit
000 adress
0101 data
1 stop

so 0100001011 msb fist

what do you sugest i use then

Leon

UART code.

Igor_Rast

OBJ

SPI : "FullDuplexserial"


PUB main

dira[8]:=1

SPI.start(31,30,2,9600)

repeat
SPI.bin(0100011011,10)
SPI.bin(0100011011,10)


waitcnt(cnt+clkfreq*10/1000) '' Pause for 10ms
!outa[8]
waitcnt(cnt + clkfreq)

getting close ????

is the IC wiring good if you know the ic ?

Peter Jakacki

Igor, just change your serial mode from 2 to 0 (31,30,0,9600) as you don't need to invert the data.

A few tips:
The name of the object is also a bit misleading, it has nothing to do with SPI and although we are not name police we must remember that the whole reason for naming anything is to make it identifiable. Formating the code correctly for posting isn't a bad idea either. Also the device will run up to a maximum of 24000 baud and remember that you don't have to lock it to a standard baud rate either. This may be handy if you do not want to dedicate a cog to full duplex since all you need is some simple Spin code generating a serial bit stream without the need for any input either.

Igor_Rast

thanx for the advice peter , I could made up better names , it was chaning tring ,changing again and trying ,anyway
thnx

i got it working with a simpel dira outa code

eureka moment