Matrix user forums

Hi, Is there a way to change the RS232 component so that 255 is available? Perhaps add another variable (whose value can be tested) that is dedicated to "RX Buffer Empty". RX Buffer Empty = 1, RX Buffer Not Empty = 2? I want to try to setup an RS485 network and I will be receiving a VAR that could b...

Hello Ben,


Thank you, I appreciate it.

Ron

Hi, This checksum routine is going to be used to communicate between multiple PICs on an RS485 network. I believe Ben's example used an INT and did what you describe. What I am trying to do is not use an INT variable as I believe all others VARS in Ben's example are BYTEs. If I can use a BYTE as I o...

Hi,

It has been a while and I never got around to trying this.

I noticed that the VAR used to sum all the bytes was a TYPE INT.

Could this SUM VAR be a TYPE BYTE and then the carry nibble would automatically be dropped as the data bytes were added together?

Thanks,

Ron

Hello Ben,

Thank you.....

Ron

Hello Sean,

Thank you, that helps a great deal .

Ron

Hi, I am very confused regarding RS485 circuits connecting to PIC 16F/18F. I find 2 basic circuits regarding BIAS resistors typically found at the Master. Many online: Pin 6 is tied to +5V Pin 7 is tied to GND Matrix MM Board: Pin 6 is tied to GND Pin 7 is tied to +5V I want to experiment with SN751...

Hi,

I am using 18F.....

How would I define an array 1 - 256?

Thank you,

Ron

Hi,

How can I create a byte array that is capable of going 1 - 3096?

Thanks

Ron

Hi Ben, Thanks again for the help. 1) Due to my very limited ability with "C" I am just going to turn on/off the output like normal to change modes. 2) Can I put this line of code in a V3 "C" block to wait before disabling the TX? while (ts_bit(txsta, TRMT) == 0); //While TSR Full Please confirm the...

Hi Ben, Thanks for your help. Regarding your answers (I am using V3 of Flowcode). 1) Do you mean hard code my control of the enable/disable RS485 driver output within the "RS232 Send Function"? How is this done? 2) Is this code customization available in V3? If it is, where do I find it and how woul...

Hello, This is great! I just started working with RS485. I have downloaded the samples but they do not load into my Flowcode. The error messages said something to the effect that my Flowcode is to old. Can you provide these examples for those of us that are using V3. Also, I am using MAX3085 and MAX...

Hello Ben, Another question regarding the RS232 component. I have been speaking with people about the hardware method of dropping the enable bit on the RS485 driver via 555 timer and they do not like it. They say that more often than not the issue is not that the slave begins transmitting/responding...

Hi Ben, Thank you for your help. Can you tell me if Flowcode generates a "start" bit. I have found a hardware solution to driving the RS485 drivers RE/DE pin. It is actually very neat. The driver is enabled on the leading edge of the "start" bit and is disabled a few micro seconds after it sees the ...

Hello, EDIT NOTE: Much of the original post is gone since I have figured out some of my questions myself. I want to communicate between multiple PIC's via RS485. I am hoping I can do this by using the RS232 component in Flowcode V3. I have attached a schematic that makes sense to me. I have a situat...

Hello, How do I determine where this warning is coming from. I searched the "C" file using VS2008 and only found 4 lines in the code that call out FCM_TMR0. How do I locate which is causing this and where it is located in my project? Building CASM file Serious Warning: Possible sw stack corruption, ...

Hello Ben,

I have attached a schematic supplied by the company. Does this help you determine if it is eliminates the need for the MAX232?

Thank you,

Ron

Hello, I am hoping someone might be able to answer this. I usually place a MAX232 chip in my designs for RS232 communication to a PC. Since Serial ports are not often found on new computers I have been using a USB to serial converter cable to communicate with a PC. If I am using a USB to Serial conv...

Hi,

Here is the line from the data sheet you are talking about Ben.

The RA4/T0CKI/C1OUT pin is a Schmitt Trigger input. All other PORTA pins have TTL input levels. All PORTA pins have full CMOS output drivers.

This means it can sink or source as normal, correct??

Thanks

Ron

Hi Ben, I think I have TMR0 working the way I need it to. I stayed up all night working on it. Putting the { } did solve the compiler return 1 problem. I went into the C file and looked at similar code and the { } were always there, so I added it. I also fixed a few other problems I had with the "C"...

Hi, My code is not solving as expected. I think the issue is a calculation I am doing. S1_TMR0_END_COUNT = S1_TMR0_START_COUNT + ((FCV_S1_PARAM_2 * 100) + FCV_S1_PARAM_3); S1_TMR0_END_COUNT is unsigned long S1_TMR0_START_COUNT is unsigned long FCV_S1_PARAM_2 = BYTE FCV_S1_PARAM_3 = BYTE Can I do the...

Hi, After looking at the "C" file I have entered the following code when compiles to 0. if (TMR0_CURRENT_CAPTURE >= S1_TMR0_END_COUNT) FCV_S1_PARAM_1 = 0; FCV_S1_PARAM_2 = 0; FCV_S1_PARAM_3 = 0; FCV_S1_PAUSE_1_SHOT = 0; S1_TMR0_START_COUNT = 0; S1_TMR0_END_COUNT = 0; Why don't I need FCV_ in front o...

Hi Guys, OK, I have entered my new 32 bit VARs in define supp code. How do I do the following in "C"? I looked at Boost manual but everything I try comes up 1 on compile. If 32bit_var1 >= 32bit_var2 Yes 8bit_var1 = 0 8bit_var2 = 0 8bit_var3 = 0 32bit_var2 = 0 No fall through to next section of code ...

Hi,

In the TMR0 macro we select internal clock or pin on pic.

We then select low to high or high to low.

If I am using the internal CLK0 option (timer mode, not counter mode) can I still use the T0CKI pin on the PIC as a DI/DO without affecting the timer function?

Thank you,

Ron

Hi Ben, I want to be able to count in 10ms ticks as a pause value is allowed to be entered in the format XXX.YY (0 - 200.99). Since there are 2 decimal places this is based on 10ms Ticks. 1/75 = .01333333 which is a 13ms tick (I think). I have worked out a 20MHz, prescale is 32 and then a tmr0l += 1...