Matrix user forums

No, you have to keep the typecast. int a, b = 10, c = 4; float d; a = b/c; d = (float)b/(float)c; The variable "a" will be 2, because it's an integer and thus no decimals. The variable "d" on the other hand will be 2.5, because we convert the variables "b" and "c" from integer to floats, which allow...

Hmm, I can't seem to find a list of supported microcontrollers for the PICStart plus. If it works, you don't need a new one, unless you want a USB programmer instead of the old RS232. But, as I said, MM's programmer is made so you can plug-in E-blocks, so it's easier for prototyping. Or you could tr...

Could you provide the compiled C code ?
I don't have flowcode for AVR.

Nicolas

Hi Alberta, What's your preferred programming language ? Microchip has a free IDE (MPLABX) with C/C++ compilers (XC8, XC16, XC32). There are free versions of the compilers provided by microchip but you should know there's a file size restriction. I'm sure you could find some interesting source codes...

It must be that the DDRAM on your LCD is re-arranged differently than on the 16x2 LCD from Matrix Multimedia, even though it's compatible with the HD44780 controller. Maybe it's like Brandonb said. Instead of having a continuous DDRAM line from 0x00 to 0x0F, you have an LCD with a DDRAM going from 0...

... I'll try to remember that Martin, thanks .

Have you tried just keeping the configuration at 16x2 and only writing on the first line ?

Hi, It's quite simple. Make a LUT (lookup table)/array and go through the table whenever you want to display a certain pattern on your 7 segment display. LUT_7SEG[] = { 0x3F, // 0 0x06, // 1 0x5B, // 2 0x4F, // 3 // ... }; Checkout wikipedia for other hexcode: http://en.wikipedia.org/wiki/Seven-segm...

Au cas ou tu ne savais pas, sache que tu peux écrire des valeurs binaire, au lieu de convertir tout en décimal.
Il te suffit juste de mettre le préfixe "0b" (sans quote) et puis ta valeur binaire, par exemple : 0b00110101 ou même 0b01110.

- Nicolas

D'après moi, tu écris les caractères à accent, rangée par rangée (de 5 bits) dans le CGRAM aux adresses allant de 0 à 7 avec la fonction "écriture en RAM". Après il ne te reste plus qu'a faire un PrintAscii et mettre une valeur entre 0 et 7. Tu n'as pas besoin de la fonction Commande, ça c'est juste...

That's just the way the input component has been programmed. It sets the TRIS register so that the selected I/O are set to inputs and reads the inputs from the PORT register to a variable. This is what the input component does : TRISX = TRISX | mask; // set mask bits to TRISX variable = PORTX & mask...

Is there any difference between your v4 code and v5 ?
Could you post both of them on the forum so we can have a look ?

- Nicolas

You have a lot of stuff connected to your PIC ! I just checked the code real quickly and I have something to propose. Like kersing said, dual-boot implies you "reboot" the controller. From there you have two options IMO: 1) Have a variable in the EEPROM with which you can start one of the three prog...

Le standard RS-232 permet une communication série, asynchrone et duplex entre deux équipements. Tu ne peux avoir qu'un master et un slave (ou master et master). Si tu veux communiquer avec plusieurs equipements tu devras trouver autre chose. Je n'ai pas de "meilleur" protocole de communication a te...

You can set a condition to your while loop. Right now, the while loop in Martin's "Scroll one line V2.fcf" code is always true: while (1); You can change that to a condition by clicking on the while loop icon and setting a condition. For example, you could get out of the loop when the text finishes ...

The watchdog timer is a timer, that when it reaches it's max value (or something like that) it resets the microcontroller. This is used to prevent the microcontroller of getting stuck inside a loop (or something similar). Let's say you have a program with a main loop and you are using the watchdog t...

If you ever have that problem again, post your Flowcode file so we can take a look at it.
I personally never had any issues with the RS232 component.

- Nicolas

There's probably a complicated way to do it in C (pointer to function ?), but what you made is how I'd do it.
There's no way you can call a function just from setting a variable to a specific value.

- Nicolas

Did you open your Flowcode file from a usb stick or other external memory device ?

From your post : "Unable to create C file Y:\......".
When you create a file on your computer it's usually created on the C drive.

- Nicolas

... For example 1st value is 152 Then if the second sample is 68 since not printing " " after 152 then the display will show 682 even though it is a byte that has been printed (since the 2 will remain from the previous number). Its just an LCD formatting issue. ... How did I not see that... *facepa...

Could you post your Flowcode file so I can take a look at it ?
It might be an error setting it's baudrate.

- Nicolas

That's strange ... Your RJH is an 8 bit variable and the TMR1L is 8 bit too.
Have you tried setting RJH to, let's say, 127 and see if it still shows values bigger than 255 ?

I don't see anything wrong in the code though...

- Nicolas

From this post the beta should be released any day now.

- Nicolas

I've checked the PICASO-SGC datasheet (that's the controller used on the GLCD) and there doesn't seem to be any command for the backlight.
Anyways, I don't think OLED displays have a backlight... ?

What you could do is make the image a bit darker before sending it to the screen.

- Nicolas

Tu pourrais utiliser I²C ou même SPI, pas obligé d'utiliser le RS485.
Je n'ai pas d'expérience avec la communication via RS485, mais je suppose que maxim-ic devrait avoir quelques IC qui font la conversion vers RS485.