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P89V51RD2 microcontroller moving LED display using Buffer 74LS245 and 74HC595

raja e over 13 years ago

Hi,

There are 4 Columns and 16 Rows of LED Matrix.

I have circuit with Philips microcontroller with Port0 and Port1 connected to ULN2003 to Rows of the LED Matrix.
While Port 2.2 to Port 2.7 (6 pins) are connected to 74LS245 buffer. The output of this buffer (Pin 11, 12 and 13) are connected to STCP, SHCP and DS Pin of 74HC595 shift register which is connected further to columns of the LED Matrix.

I can choose one row at a time, ON it by keeping all other rows OFF, and then want to ON the entire column.
Can someone help me with some sample code to communicate 74LS245 and 74HC595 shift register through the microcontroller?

Regards
RS.