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Recent content by LF_LF

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    Please help in ADC problem

    The two attachments are the same.... i press one more time due to internet lagging.
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    Please help in ADC problem

    HI, everybody. I am doing a motor controller where signal form motor is passed to ADC and i obtain info from that point using altera DE2 board. My question is about the ADC output waveform. I use ADS7861 ADC from Texas Instru. I use a current sensor to sense the voltage and pass to ADC with only...
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    Regarding ADC output waveform

    Hi, everybody. I am using DE2 board to test my ADC , ADS7861 from texas instrument. I designed the code and it can be displayed through my Quartus SignalTap II Analyzer. However, the result is in accurate. The adc should has up to 5V range but the output waveforms are something like distorted or...
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    Please Help in data conversion

    i designed a VHDL module in obtaining signal from GPIO of DE2 board (a serial input). The code is as below. I tried to store the shift register value (where the 16 bits input signal is shifting in) into an array in order to separate and make it parallel output(1 bit per output pin to transfer...
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    Uegent! Regarding Busy signal from ADC to interact with SPI

    Re: Uegent! Regarding Busy signal from ADC to interact with Hi, FvM. Sorry to confuse you guys. My design is based on clock cycle of ADC. The data conversion need 16 clock cycles, thus i design a VHDL module/block for conversion start to high every 16 clock cycles.Then, the serial data output...
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    Uegent! Regarding Busy signal from ADC to interact with SPI

    HI, everybody. For my project, i need to create a SPI to interact between DE2 board and ADC(ADS7861). I have created one but i think iy wouldn't work due to busy line and my approach. My approach is that i use the estimation approach where i use clock cycle to calculate the data conversion...
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    hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

    Re: hardware interface between FPGA DE2 board(3.3V) and ADC( Thanks karesz. I read through it and i think it should work. However, i am lack of time. This MAX need to order online and it take me 2 working days for the delivering while i need to submit this end of week. Therefore, i try to...
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    hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

    Re: hardware interface between FPGA DE2 board(3.3V) and ADC( The Ev-Board has the provided 5V, 3.3V and GND pins that i can use straight. I tested with oscilloscope already and it can be trusted.Therefore, i am pretty sure i didn't miss the GND. Then i able to obtain the expected waveforms...
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    hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

    Re: hardware interface between FPGA DE2 board(3.3V) and ADC( Thanks for anybody above's help. I found out the sn74lvc244a and SN7417 for conversion of 3.3V to 5V and vice versa, The waveform is expected at the output of this translator but problem occurred when i connected to ADC( i supply 2...
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    The comparator function in VHDL

    Hi, thanks for your reply. I am doing the induction motor feedback. The signal from motor to ADC, which is ADS7861 from Texas instrument that i am using. It converts to 16 data out where 12 bits are the valid data. However, i attached only 12 bits data from this stream of data. The speed is...
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    The comparator function in VHDL

    Good morning,everybody. I am doing a feedback system in DE2 board.Then,i want to construct a set of VHDL code that enable me to compare the incoming signal with the predefined value so that the difference can be used as improvement value to increase or decrease the input in order to make sure...
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    hardware interface between FPGA DE2 board(3.3V) and ADC(5V)

    HI, i need some technical help on the DE2 board. I am using DE2 board for my project and i need to interchange signals(SPI) to an ADC. The ADC is 5V for logic high but the max output signal for DE2 board is only 3.3V. I have tried to use the level/voltage translator(SN7417/SN7407) but it seen...
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    Urgent !!! Regarding Output of FPGA Alteral DE2 board

    Well, this is continued for my last post. I just want to show the output clock result for the TXS0108E. It is very sensitive and this is the clearest that i able to capture. Most of the time it is accompanied with lot of noise. The increment from 3.3V to 5V is achieved with some offset.Well, i...
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    Urgent !!! Regarding Output of FPGA Alteral DE2 board

    I want to interact my FPGA DE2 board with an ADC. However, the max output voltage from DE2 board is only 3.3V while my ADC is 5V peak. I tried to not connect anything in between and hoping again hope to obtain my expected result by just connect a jumper between DE2 board and ADC but it is not...
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    Please help --- Alteral DE2 alarm/buzzer sound

    Hi, good well to everybody i need to design a VHDL code to trigger an alarm/buzzer sound provided on Alteral DE2 board. However, i do not how to trigger it from my program. It is not written on the manual. Can someone shows me the way or provide me some reference? Thanks a lot. P/s: i want a...

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