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26 Threads found on edaboard.com: Cannot Read Output
Hi, so i did this program for a vending machine, the machine works fine, but i get this error, and i cant find whats wrong, this project is duw tomorrow , can some help me plz. The errors i got: #Error: ELAB1_0008: reu.vhd : (369, 15): cannot read output : "Sie1". # Error: ELAB1_0008: reu.vhd : (370, 16): cannot (...)
I would suggest you read up on the IPC-C-350 series of documentation and what they are used for....describing a PCB in digital form, thus by default you cannot create one from a schematic! you need a physical PCB.
Hello guys, I'm new with VHDL. I'm trying to understand what this error mean : vhd(20): cannot read output "s1". There is my code: --------------------------------------- library IEEE; use IEEE.STD_LOGIC_1164.ALL; entity b1 is PORT ( a, clk, reset_sync :in STD_LOGIC; s1, s2
I understand what you are saying, but if this output is taken from an entity that is included in my design as a port map, I cannot add any signal to that entity , I need to test this output in the top level design. this is the problem
What is the format of the data that I read from the EPROM using a programmer? How do I convert this to assembly language? As far as I can see, the output from the programmer is Intel Hex format, and has all the fields indicated by the format. But, I cannot find the same hex codes that I see in the output of the debug (...)
out: the value of an output port can only be updated within the entity model; it cannot be read. buffer: the value of a buffer port can be read and updated within the entity model. However, it differs from the inout mode in that it cannot have more than one source and that the only kind of signal that can (...)
Hi! (1) Inputs cannot be a reg data type - only wire. (2) outputs can be both wire and reg. As I see you are mixing a module description with a testbench... that's not good :wink:. Move initial blocks to a separate testbench file (for example tb.v) and instantiate your test1 module in it : module tb; reg A; wire B, C; // instanc
Hi, Not familiar with that chip but a quick read of the data sheet states that is just the 4Mhz internal oscillator and thats it. Timer0 takes the Fosc/4 pulses to create its Timings with the Prescaler to produce accurate delays of up to 500ms or so, but cannot see how its output can be fed back as the main operating frequency if thats (...)
Ok my first question, Why do we need a voltage comparator (LM311) there? A voltage comparator compare the + and - voltages and output the difference?? Because PIC cannot read L or C directly, so there need to be something between to convert it to either time (pulse length measurement) or voltage that can easilly be r
Those are crazy component values! I cannot read what frequency you are after - it looks like 10MHz. Anyway, I have attached some suggested component values for 10MHz. You should take the output from the transistor source. Keith.
You may check the max. output swing vs (Vcc - Vss), for examples, you cannot get an output of +6V if your +ve supply is +6V; have a look on the datasheet of the OPAMP.
hiii i am working on PIC24F ,i am trying to read a temperature value fom sensor with I2C with the following program can any one please suggest me where i am wrong and how to do #include #include "I2CM1.h" void initI2CportSHT21(){ TRISBbits.TRISB5 = 1; // Digital output (make it input only when (...)
I know in VHDL we cannot read the port within the module. What do you mean, if by port you mean the pins of the chip then you can read them if you declare them as buffer output or inout input/output or if you can use an out output and use a signal that stores the last value that was sent (...)
You cannot have this -" #100 $finish;" in an always block(read up on "always blocks" in verilog). Move that "$finish" out of the always block if you want the $finish statement. Also when you say word do you mean 4bytes? Right now your code outputs 8 bits at a time.
I am studying RF circuit. I read the book "Elsevier - Telecommunication Circuits & Technology - 2000".The page image is attached. I know f= 1/2*pi*(Ro//RL) C where Ro is output resistance of transistor and RL is load resistor . I try to solve for equation(1.3) , I still cannot get that answer. Can anyone help me or hint me to do .thanks.
I am studying RF circuit. I read the book "Elsevier - Telecommunication Circuits & Technology - 2000".The page image is attached. I know f= 1/2*pi*(Ro//RL) C where Ro is output resistance of transistor and RL is load resistor . I try to solve for equation(1.3) , I still cannot get that answer. Can anyone help me or hint me to do .thanks.
i find all tuner based on DVB-S has 1Vp-p output level. is this output level required by the standard? i have read the DVB-S2 standard but i failed to find anything about this and I cannot find DVB-S standard. please tell me how to determine specification from standard.
I am trying to read a button by debouncing. I am using cvavr and i have configured the interrupt service routine of timer0. the problem is that i cannot set and reset the output LED1. And how can i read more than one buttons? thanx // Alphanumeric LCD Module functions #asm .equ (...)
I have a projecy on rfid . i am using u2270 from atmel . i have a manchester code in output of this chip with 512 us width of pulse . i want read a card but i cannot read real number of this card . please help me.
the mirroring in not perfect, vds difference in the 2 PMOS. You cannot fix the output voltage to some number, not possible. The offset would add offset to the differential voltage required to cause the comparator to flip. The offset would also be added by the input pair.