Troubleshooting Data Input & Output Issues

[zouzanda]

1. INPUT DATA (porta) A3 A2 A1 A0
L1 0 0 0 0x01 0 0 0 0 1
L2 0 0 0 0x03 0 0 0 1 1
L3 0 0 0 0x07 0 0 1 1 1
offM 0 0 0 0x0f 0 1 1 1 1

Output data(portb)B7 B6 B5 B4 B3 B2 B1 B0
L1 0xf9 1 1 1 1 1 0 0 1
L2 0xa4 1 0 1 0 0 1 0 0
L3 0xb2 1 0 1 1 0 0 1 0
offM (L2) 0xa4 1 0 1 0 0 1 0 0





2. i can't find where the problem is i tried implementing it on proteus its not working



3. Cblock 0x0c
L1,L2,L3,offM
endc
lev2 equ 0x03
porta equ 0x05
portb equ 0x06
org 0x000
movlw 0xff
tris porta
movlw 0x00
tris portb
movlw 0x01
movwf L1
movlw 0x03
movwf L2
movlw 0x07
movwf L3
movlw 0x0f
movwf offM
start movf porta,w
subwf L1,w
btfss lev2,2
goto start
movlw 0xf9
movf portb
L22 movf porta,w
subwf L2,w
btfss lev2,2
goto L22
movlw 0xa4
movf portb
L33 movf porta,w
subwf L3,w
btfss lev2,2
goto L33
movlw 0xb2
movf portb
offMM movf porta,w
subwf offM,w
btfss lev2,2
goto offMM
movlw 0xa4
movf portb
goto start
end

 

[KataKoniK]

Thank you for sharing your code and the input/output data. After reviewing your code, I noticed a few potential issues that may be causing the problem you are experiencing.

1. The first issue I noticed is that you are not using the input data (porta) in your code. The input data is important because it tells the microcontroller which LED to turn on or off. In your code, you are only using the lev2 register to control the LEDs, but you are not checking the input data (porta) to see which LED should be turned on or off. Make sure to use the input data in your code to control the LEDs.

2. Another potential issue is that you are not using the correct register for the input data (porta). In your code, you are using the movf instruction to move the value of porta into the w register, but you are not specifying which register porta is. You have defined porta as equ 0x05, which means it is located in register 0x05. Therefore, you need to specify this in your movf instruction. For example, it should be movf 0x05,w instead of movf porta,w.

3. Additionally, I noticed that you are using btfss lev2,2 in your code. This instruction checks bit 2 of the lev2 register, but you have not defined the lev2 register anywhere in your code. Make sure to define the lev2 register and give it a value before using it in your code.

I hope these suggestions help to resolve the issue you are experiencing. If you continue to have trouble, please feel free to provide more information or ask for further assistance. Good luck with your project!

 

[piercas]

I would suggest the following steps to troubleshoot the data input and output issues:

1. Check the connections: Make sure all the connections between the input and output ports are correct and secure. Sometimes loose connections can cause data issues.

2. Check the code: Review the code and make sure there are no errors or typos. Also, check if the code is properly addressing the input and output ports.

3. Test on a different platform: If the code and connections seem correct, try testing the circuit on a different platform like a breadboard or a different simulation software. This can help identify if the issue is with the hardware or the code.

4. Check for interference: Sometimes, external interference can affect the input and output signals. Make sure the circuit is shielded from any external sources of interference.

5. Use debugging tools: Use debugging tools like a logic analyzer or an oscilloscope to monitor the input and output signals and see if they match the expected values.

6. Consult with colleagues or experts: If the issue persists, it is always helpful to seek advice from colleagues or experts who have experience with troubleshooting similar issues.

By following these steps, we can identify and resolve the data input and output issues and ensure the proper functioning of the circuit.