AA,
well in my project i tried to link between Labview as a software and A FPGA board as a Hardware implementation
the link between the labview and the FPGA board is a serial line connecting both sides ... as a test for the UART VHDL Code loaded on the FPGA we use the Hyper-terminal to write on the serial port and observe the equivalent binary representation received on the FPGA Leds also we perform the read test by generating a binary sequence using sliding switches in FPGA board and observe the O/P on the hyper-terminal both tests are correctly working.
Next phase is to do the same tests but using a (Basic serial port Write & Read.VI) Example in LABVIEW instead of Hyper-terminal...
the following are introduced:
1- Read test .....OK working properly [No problems]
2- Write test ..... the equivalent binary format for the written strings on LABVIEW is not Matched to the received Binary format on the FPGA board LEDS for example:
| the binary representation for the string A is 100 0001 as in ASCII code table ==> 100 0001 |
101 |
65 |
41 |
A |
But on the FPGA board the received sequence is 100 1011
the two underlined bits are always one in all strings wtever the string written on LABView
I don't know why ....???!!
In my project the signal required to be TX over serial line is an analog pulse signal then i used the analog to digital.VI converter in waveform Palette in lab view then the digitized o/p is connected to a Digital to Binary array .VI in waveform Palette>>digital converter subPalette
since the VISA write takes strings only i used a Byte Array to string.VI in string Palette.
Are these conversions are correct ....??!! or i lost the signal i mean it's changed
=> if correct then when i write this signal on the port and receive it again. the received signal is a shifted version of transmitted signal and the full scale pk to pk is sticked to 2 evenif i changed it using a controller....??!!
why the shift ....and why fixed pk to pk ....??
Last question is in the Digital to binary Array.Vi when i try to adjust it to Digital to 8bit binary Array => simulation stopped and an error message is showed up telling me that there are large number of data to be represented.
How can i resolve this error coz my data should be 8 bit not 16 or 32 bit ....???!!!
Attached to this POst my LabVIEW code .
Thnx in advance
Sherif farouk (",)
-----------------------
