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I would suggest using MPASMWIN (the assembler part of MPLAB), it's far simpler to use than MPLAB itself - it's installed by MPLAB in one of it's directories.
Just run it, brose and find the .ASM file, then click 'Assemble', it will create a .HEX file, and warn you if it finds errors (listed in the 'ERR file).
Simulating partition 1 [95BC97B7]...
Animation started with warnings...
PROSPICE Release 6.9 SP2 (C) Labcenter Electronics 1993-2006.
SPICE Kernel Version 3f5. (C) Berkeley University ERL.
Reading netlist...
Net VDD taken as alias for VCC
Net VSS taken as alias for GND
Reading SPICE models...
Building circuit...
Warning: Net #00057 has no DC path to ground.
Check pins: RL1-NO, RL1_S1-+
Warning: Net #00058 has no DC path to ground.
Check pins: RL1-COM, RL1_S1--, RL1_S2--
Warning: Net #00060 has no DC path to ground.
Check pins: RL1-NC, RL1_S2-+
Instantiating SPICE models...
[U1] PIC16 model release 6.9 SP0 simulating PIC16628 device.
[U1] Loaded 128 bytes of persistent EEPROM data.
[U1] Loading HEX file 'temp.HEX'.
[U1] Read total of 3722 bytes from file 'temp.HEX'.
[U1] Loaded 1855 program words and 4 data bytes.
Warning: [SPICE] singular matrix: check nodes #00060 and #00060
[SPICE] Starting Gmin stepping: 120 steps
Warning: [SPICE] Gmin step [2] failed: GMIN=0.630957
Warning: [SPICE] singular matrix: check nodes #00060 and #00060
Warning: [SPICE] Gmin stepping failed
[SPICE] starting source stepping
Warning: [SPICE] singular matrix: check nodes #00060 and #00060
Warning: [SPICE] Source step [0] failed: source factor = 0
[SPICE] Error 102 - Too many iterations without convergence.
Real Time Simulation failed to start
Totaliters=0, Totalsteps=0, Goodsteps=0, Badsteps=0
YEAH,you're right.There were ground connections but one power connection was just label not real power supply so I modified it and the circuit works well now.
I was trying to build LCD clock using pic16f628. I already compiled the program using MPLAB and it was a success. But as i try to connect the hardware, the lcd just wont display anything. Please help.
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