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Hi guys,
Its working !! Thanks for helping!!
Display is not moving to entire left..
I mean I i m sending "ABC" from right most first 'A" will display the" BC" follows it.. But when it reaches the left most wall(col) as soon as 'A' touches the Left most col entire display would start again...
Its working!!
The problem was called as "Ghost Effect"
Solution:
1.Shift data into Shift reg
2. Turn off ULN outputs.
3. Latch data in Shift reg.
4. Set new ULN output.
#include<reg51.h>
sbit clk=P2^0; //serial clock pin
sbit Data=P2^1; //serial data pin
sbit OE=P2^2;
sbit OP= P3^7;
int c=0...
Thanks
I did changes according to your suggestions and it partially seems to be working.
But the LED brightness goes down.
According to below values For 1st 10 LEds Middle rows has to glow then for next 10 Leds 1st row has to turn on(to say in simple display should look like Square wave).
But...
Exactly the same i am trying to achieve.
If you look at the schematic in my first post.Columns are connected to shift reg 4094 and rows are connected to MCU pins through ULN.
According to your suggestion its working fine for single column shifting. but if i want to shift 2 columns of different...
How does first Row gets shifted.. I think it should be first Column.
when you shift 1 bit towards right entire column will be shifted. and if i send a next col value the current value is being displayed and its shifted one bit right(You will loose the first information). To avoid this i need to...
Hello,
I am writing code for LED matrix which as 60 col * 7 Row(420 leds).
I have attached complete schematic of LED matrix as a reference.
I dont know how to refresh the display.
void main ()
{
clk=0;
Data=0;
OE=0;
OE=1;
while(1)
{
Data=1;
P1=0x7F; // 7F to...
Hello,
I am using SIM300 with 8051 MCU
I want to read only first message after reading it i will delete those.
I need suggestion which method is best to read msg i.e Interrupt or polling.
Regards
Kiran
Hi,
I am using GSM SIM300 modem with vodafone GPRS activated sim.
I am facing error after AT+CIPSTART command . its showing ERROR IP: STATUS
Please help me where i am going wrong.
Use higher current rating power supply, because when data is transmitting power consumption can go upto 1A.So change the power supply to higher wattage
Thanks Bigdogguru,
I ll take this as reference.
I am building with PIC18F family which USB feature also so it ll easy to interface with PC side also.
I need how JTAG works(protocol) so it ll be easy to write code as well as understand the Xapp058 note also.
I am not understanding from PC what...
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