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Hello bigdogguru
Thanks a lot by answer!
I already uploaded the simulation. The attachments (signal_lcd end signal_lcd1) at the botton of my post is oscilloscope and the circuit respectivelly.
I made other circuit using the same 74hc04 and fix this stair steps, but I'd like understand why the...
Dear friends:
I am working with Proteus 7.7 and making a simulation with 74HC04 as show in the figure
The frequencia that appear first is 1MHZ.During this pulse train I integrate the signal and shape a pulse with a lenght equal the time of the train.But , in the discharge of the capacitor de...
Hi Sillo.
Thanks by answer.
As I sad in my last post, I found what was wrong in lcd module. The true is: The lcd module is normal and does not have problem. The problem is in the spi transmission.
I was transmitting in 1Mb, but if We change the speed, the problem continues. I made a test with...
Dear friends!!
Thanks a lot in special to Alex to try to help me in my problem. For some days I have studied and monitored the signals from Proteus osciloscope to understand what kind of problem was happening. I made a loop to send always the same signls . This loop contained a delay which is...
Yes Alex!!
If I open the schematic made with 6.9 with the 7.7 version the problem appear.
Otherwise I have make monitoring with the osciloscope of proteus and the signals are perfect (RS and EN) . The reset of the shift-register is made by software and is OK.The most interesting is that some...
Dear Alex!
Thanks for your reply.
The software that I am using is the same for 6.9 and 7.7 (hex file) . It is in assembler and compiled by MPLAB.
The schematic was made, first, for proteus 7.7, when the problem appeared. Then I tried to found out what was wrong. How I didnt anyone result, I...
Dear friends:
I am working with Proteus 7.7 and making a simulation with a LCD module 16x04.
I am using only two wires to make conection between microprocessor and LCD module and a shift-register to convert serial to parallel datas.
The simulation start ok and after some seconds the...
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