HT16K33 led 14 segment backpack

[louislouis]

Hi folks,

I want to ask members, someone has done working with this HT16K33 14. segment LED backpack in PBP.
https://www.adafruit.com/product/1911
I am trying to get this thing live, but no success. Any help welcome.

Thanks.

Louis

[richard]

i did post an example but its been expunged or lost when the forum crashed, all i can find on my pc is this


;7x5 led array witk ht16k33 mapped col 0-5 a0 - a6;highbyte of ROW[x] maps to a0:7 i2cread/write natively sends high byte first.
;chip actually wants data lowbyte first ~! typical
;pic12f1822
#CONFIG
__config _CONFIG1, _FOSC_INTOSC & _MCLRE_ON & _CP_OFF & _CPD_OFF
__config _CONFIG2, _PLLEN_OFF & _LVP_OFF
#ENDCONFIG


OSCCON = %01110000
DEFINE OSC 8


TRISA = %001011


ANSELA = 0 'Digital
' DEFINE DEBUG_REG PORTA
' DEFINE DEBUG_BIT 0 ; if not used for pwr
' DEFINE DEBUG_BAUD 9600
' DEFINE DEBUG_MODE 0
' pause 2000
' Debug "Start",13 ,10

' DISPLAY ON 0X21
' NO BLINK 0X81
' ROW/INT 0XA0
' BRIGHT 0XEX

scl var portA.4
sda var portA.5
Led var LATA.2

SADD VAR BYTE
ROW VAR WORD[5]
COL var byte
TMP VAR WORD
CLEAR


INIT:
i2cwrite sda,scl,$E0,[$21] 'on
i2cwrite sda,scl,$E0,[$81] 'blink off
i2cwrite sda,scl,$E0,[$E8] 'HALF BRIGHT
i2cwrite sda,scl,$E0,[$A0] 'NO INT
i2cwrite sda,scl,$E0,[SADD,ROW,ROW,ROW,ROW,ROW] ;CLEAR


Main:
COL=35
while col ;walk a led backwards through array
col=col-1
TMP=0
TMP.0[14-(COL/5)]=1
SADD = 5
WHILE SADD
SADD=SADD-1
ROW[SADD]=0
WEND
ROW[(COL//5)]=TMP
i2cwrite sda,scl,$E0,[SADD,ROW[0],ROW[1],ROW[2],ROW[3],ROW[4]]
pause 100
wend
SADD = 0
FOR ROW=0 TO 127
ROW=ROW<<8
i2cwrite sda,scl,$E0,[SADD,ROW,~ROW,ROW,~ROW,ROW]
pause 50
ROW=ROW>>8
NEXT
FOR COL=0 TO 34
TMP=0
' SADD=COL//5
TMP.0[14-(COL/5)]=1
' Debug 13,10,#COL,9,HEX TMP,9,#SADD
SADD = 5
WHILE SADD
SADD=SADD-1
ROW[SADD]=0
WEND
ROW[(COL//5)]=TMP
i2cwrite sda,scl,$E0,[SADD,ROW[0],ROW[1],ROW[2],ROW[3],ROW[4]]
pause 100
NEXT
LED=!LED
pause 500
goto main
end

[louislouis]

Thanks for reply. Not working but now more clear for me how to handle this controller. I tried init the controller with default I2c adress $70 like this:


;pic 12F1840
#CONFIG
__config _CONFIG1, _FOSC_INTOSC & _MCLRE_ON & _CP_OFF & _CPD_OFF
__config _CONFIG2, _PLLEN_OFF & _LVP_OFF
#ENDCONFIG


OSCCON = %01110000
DEFINE OSC 8


TRISA = %000000


ANSELA = 0 'Digital

scl var portA.2
sda var portA.1

SADD VAR BYTE
ROW VAR WORD[5]
COL var byte
TMP VAR WORD
CLEAR

INIT:
i2cwrite sda,scl,$70,[$21] 'on
i2cwrite sda,scl,$70,[$81] 'blink off
i2cwrite sda,scl,$70,[$E8] 'HALF BRIGHT
i2cwrite sda,scl,$70,[$A0] 'NO INT
i2cwrite sda,scl,$70,[SADD,ROW,ROW,ROW,ROW,ROW] ;CLEAR

pause 200

;send something

row=5
SADD=1

i2cwrite sda,scl,$70,[SADD,ROW[0],ROW[1],ROW[2],ROW[3],ROW[4]]


No sign of life.

[richard]

No sign of life.

would not expect any with $70 as an address , if you have a ht16k33 the address is %1110xyz0 where xyz are a2 a1 a0

if a0-a2 are set low the the address is $e0 as per my example

[richard]

not only that row[0] to [4] are set to 0 still



;pic 12F1840#CONFIG
__config _CONFIG1, _FOSC_INTOSC & _MCLRE_ON & _CP_OFF & _CPD_OFF
__config _CONFIG2, _PLLEN_OFF & _LVP_OFF
#ENDCONFIG
OSCCON = %01110000
DEFINE OSC 8 TRISA = %000000
ANSELA = 0 'Digital
scl var portA.2
sda var portA.1
SADD VAR BYTE
ROW VAR WORD[4]
COL var byte
TMP VAR WORD
CLEAR
INIT:
i2cwrite sda,scl,$e0,[$21] 'on
i2cwrite sda,scl,$e0,[$81] 'blink off
i2cwrite sda,scl,$e0,[$E8] 'HALF BRIGHT
i2cwrite sda,scl,$e0,[$A0] 'NO INT
i2cwrite sda,scl,$e0,[SADD,ROW,ROW,ROW,ROW] ;CLEAR
pause 200;send something
row[0]=5:row[1]=4:row[3]=2:row[0]=1
SADD=1 ; not sure about this might need to be 0
i2cwrite sda,scl,$70,[SADD,ROW[0],ROW[1],ROW[2],ROW[3]]

[louislouis]

That default address I got from product listing:

IIC address: default address 0X70
A0, A1, A2,: IIC data address control terminal
IIC address calculation: 0X70+A0+A1+A2 (floating is 0, shortet A0 is 1, A1 is 2, A2 is 4,
for example A0 and A2 is shorted the IIC address at this time = 0X70+1+4=0X75)

[richard]

that's for a 7 bit i2c address scheme, arla arduino. pbp uses an 8 bit address for i2c

[louislouis]

Of course, you're right. Now something happening. The display lit up and does some counting and flickering with segments.
That with your firstly posted code. Now figuring out how to display numbers and characters.

[richard]

don't lose sight of the fact that my code is for a 5 x 7 bit matrix , you have a 4 x 14 bit alpha led's