project bluetooth controlled car

[MarkGeelen]

Hi,

I am doing my graduation project with your E-blocks. I'm making a bluetooth controlled car. A bit like RC car. I use the standard E-blocks in stead of the formula flowcode. I have the bluetooth E-block, the microcontroller board with Atmega 32 applied on it. Flowcode 3 for AVR .
I also use the motorboard, to control the direction of the motors. The chassis is the same as applied on the formula flowcode buggy.
Now I have the following problem.

I am programming the bluetooth board so that I can send over Characters over with hyperterminal. This works, but only slow.
I have to type the characters a few times before the microcontroller reacts. It is working then, but I want to have a quicker reaction. Is there a solution for this? Or is this always so slow?

Can you help me with this one? Sorry if I posted in the wrong subforum.

Greetings Mark

[Sean]

I will be testing some AVR/Bluetooth applications this week - starting with Hyperterminal links - so I hope to have some information for you soon.

[MarkGeelen]

Oke, that would be nice.

Thanks!

[Sean]

I have attached a program that seems to provide a fast and reliable link between Hyperterminal and the Bluetooth E-Block (EB-024).

BT_led1.fcf_avr

(7.5 KiB) Downloaded 449 times

The simple demo program accepts a numeric character from Hyperterminal ('0' - '7'), sets the corresponding output on Port A, and returns a text character to Hyperterminal ('a' - 'h').

The EB-024 Bluetooth board is connected to Port D with the following hardware configuration:

Jumper links on J13, J14, J15, J16.

Wire links
P1 - TX to P2 - 0
P1 - RX to P2 - 1
P1 - CTS to P2 - 6
P1 - RTS to P2 - 7

Note: the CTS and RTS pins are assigned in the Bluetooth component properties and can be changed if necessary.

[MarkGeelen]

Oke, I will try it and let you know the results.
Thanks for your effort.

Cheers Mark

[MarkGeelen]

Hi,

It works a lot better as my own solution.
It works much quicker.
Thanks for your example file! It really helpt.

I have another question.
In hyperterminal I want to send a carriage return, so that the next command starts on a new line, this makes the whole more readable.
How do you implement this in flowcode? It is not working with the sendcommand function.
Thanks a lot!

Cheers Mark

[Benj]

Hello Mark

A carrage return is the equivalent of sending a decimal value of 13. You may also need to send a line feed character (10) to get hyperterminal to respond correctly.

So you would do the following,

SendRS232 (13)
SendRS232 (10)

[MarkGeelen]

Hi Benj,

It works; thanks!

Cheers Mark

[Sean]

The SendCommand function sends a carrage return character (0x0d) if its second parameter (bSendCR(BYTE)) is a 1. In Hyperterminal this normally returns the cursor to the start of the current line, and any subsequent text overwrites the existing text.

In Hyperterminal it is possible to force a received carrage return character to have a line feed character (0x0a) added, forcing the cursor to the start of the next line.

In Hyperterminal, go to Connection Properties -> Settings -> ASCII Setup. In the ASCII Receiving section check the "Append line feeds to incomming line ends" checkbox. This should allow each line of text to be shown on a separate display line.

[MarkGeelen]

Yes, it also works in that way.

Thanks Sean and Benj for your replies.

Cheers Mark