Matrix user forums

HI, i try to read some register in SPI, the problems is i always got 255 in value in my LCD (not in simulation). Whereas when I look at the oscilloscope my slave is sending the data i need. My problems is i can't do something with this data like my PIC don't understand. http://i46.tinypic.com/2u53qk...

Hello.I see - I think the data sheet is a little unclear here. The value is already a decimal - Twos-compliment is the format that most processors store their integers in now. If I were you I would just skip this step and see if this works for your results, as I am unsure as to why a data sheet wou...

Good evening. When a number is a string you can represent it as hex or decimal for display purposes. When a number is stored as an integer it has no base - hex or decimal, it is the same thing. What is it you need to do the conversion for? Jonny Hi thanks for answer i need to do this programs (a pa...

Hi,
i work on flowcode V5 and i don't know how to convert a value from hexadecimal to decimal. I saw this function NumberToHex$() but no the reverse.
Thanks
Flouch

The SPI interface on the MCU must be configured to operate in master mode. The Clock phase should be configured so that data is centered on the first positive going edge of the SCLK period and the polarity should be chosen so that the SCLK line is low in idle state. I have told you about these info...

Ok i have found the solution, in fact is in the programme. In spi we got 1 bit for the R/W 1 for the burst and 6 for the data
http://www.ti.com/lit/an/swra112b/swra112b.pdf
here the informations if this can help someone else

Thanks again for you're help, i'm stuck at this point because i don't know if it's my board who have a problem (the board to isolate the 3V to the 5V) or the flowcode program..

Hi Another issue you can check..idle state of the clock pulse (SCK) and in which edge clock works. Sometimes in SPI it causes the problem. You will get those information in the property of the component. I am looking if the clocks are synchronized (same frequency)? thanks again for help me but at t...

i think i got a problem in the board i had develop to isolate the 3.6V and the 5V... Can you please tell what the problem is? i think i have a problem with my schematic http://i46.tinypic.com/2j4x53t.png maybe is not good or my resistance pull-up to low (2Kohms) when i just plut my board to the led...

Enamul wrote:That seems fine.

thanks, but i think i got a problem in the board i had develop to isolate the 3.6V and the 5V...

what do you think of the program bellow ? write something with SPI and read the information

ok so i have understand how to read a register : 1 enable communcation (SS), send witch register we want to read 1byte and finally receive the information in 1 byte. and i guess to write something in register we do the same like : enable commucation (ss) and we send two byte : 1 for the register oth...

Benj wrote:Here is a basic example to read an 8-bit DAC.

so with this example i get a char ( so 1byte) and the led is to select the slave right ?
how the slave can know witch register i want to read ?

and i have two pin for the SPI : DAC pin and NVM pin it's like MOSI ans MISO ?

Benj wrote:Hello,

You simply pop in you old license key when buying the new version and it should work out the correct discount for you.

Let me know and I will put the example together for you.

i have already done i just uninstal my home version ! now i have the tools.
i'm ready
thanks again to take times

Hello, The SPI component will simulate but when you go to compile to C code the C functions will be missing. You can upgrade a home license to a pro license by simply paying the difference between the versions. You can do all this via the form on the main Flowcode page. http://www.matrixmultimedia....

Hello, Sorry but the Student / Home version doesn't support the SPI component. Only the Pro or Site license versions will allow you to compile code for this component and the other advanced components. hmm strange i can use SPI in my student version, Can iupdate to the pro version ? in not student ...

Benj wrote:Hello,

Your English is great, please could you tell me which version of Flowcode your using?

thanks
flowcode student version V5.4.0.0

Hello, Yes I would like an example because I do not understand everything, My project is to configure a receiver-transmitter (transmitter). So I have to configure different register (frequency etc) documentation page 58 below. http://www.ti.com/lit/ds/symlink/cc2500.pdf And after I have read some re...

I just started the SPI Flowcode and I do not understand how to configure the pins: SCLK, MOSI, MISO, SS. IN fact I only have pins and DAC NVM. My goal is simply to write in registers and read SPI register. If someone has an example
cordially

edit i work on the board EB006 i need other Eblock ?

hi, Someone have an idea or know a µc to use SPI ?
thanks

Enamul wrote:Hi,
I told you to have a look but this datasheet is too long to follow in short time..

hi,
ok sorry thanks again

i don't understand how read the different register to know the strength of the signal of this http://www.farnell.com/datasheets/47796.pdf, and i don't understand what initialized in this component

thanks !

Oh thanks was that, you saved my day^^ thanks again to you and enamul for this help.
Enamul if you still want to help me to code this i will accept it ( to coding and the choice of the pic)

My rf is http://www.ti.com/lit/ds/symlink/cc2500.pdf and I must read the register to know the strength of the signal. and i to have choose my pic yet. But my question is i don't understand how to use SPI in flowcode as you see when i use SPI to send a byte like 100 flow say me "character sent d". In...