emence

Hello!

Is there a way to reconfigure the SPI pins for the onboard microSd?
I want to use the sd card as external flash storage without using a very slow filestrem.

I need to allocate memory on the sd and then write to it without creating a file.

can i use

SPI.Configuration x = new SPI.Configuration(....

and how can i access the PA21/PGMD9 Pin that is used for Chipselect?
or would it be easier to configure the register of the µC to setup the SPI?
Do i need to modify the firmware?

Thanks!

Hello!

I'm receiving serialdata via the eventHandler

static void camera_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            lock(serialBuffer){
                int bytesReceived = serial.BytesToRead;
                //Debug.Print("" + bytesReceived);
                if (bytesReceived > 0)
                {
                    serial.Read(serialBuffer, 0, bytesReceived);
                    bufferLength += bytesReceived;
                }
            }
        }

works fine until i try to write the incomming data to the sd card.

            while (watchdog.ElapsedMilliseconds <= timeout && bytesWritten < size60)
            {
              
                fs.Write(serialBuffer, 0, bufferLength); //write received bytes to sd
                bytesWritten += bufferLength;
                Debug.Print("written: " + bytesWritten);
                bufferLength = 0;
               
            }
            fs.Close();

I'm receiving a picture from a camera.
if i lose the line

fs.Write(serialBuffer, 0, bufferLength);

I receive all the bytes of the picture.
When i write the bytes from buffer to SD, i lose some bytes.
I guess the write routine takes to long, and therefore the incoming serial-data can't be written to the buffer.

How can i buffer the incoming data without any loss?

Thanks in advance!

Hello! I saved an image onto the SD card via a camera. I would like to use the re-size and rotate functions from the Bitmap Class, instead of writing them myself doing it line for line... I understand it's not included in the microFramework because it also includes GUI functions that are useless on a netduino(right so far?) - Are there any substitutes for the Bitmap class? - Would it be more efficient and faster to write the code myself? - How can I create a Bitmap file out of my raw image... any ideas? Thanks in advance!

Hello there.

Yesterday everything worked properly. deployed a hundred times testing a camera communication, whatever..
Today I couldn't deploy anymore:

An error has occurred: please check your hardware.

After checking all options and successfully Pinging the Netduino via MFDeploy, I decided to update to the newest firmware 4.2RC5... couse why not.
used this guide:
http://wiki.netduino...ep-by-step.ashx

everything worked like charm.

BUT: I still can't deploy!

Deployment: via USB Device NetduinoPlus_NetduinoPlus
Target framework: .Net Micro Framework 4.2
error: An error has occurred: please check your hardware.
And its properly listed in the device manager....

Any Ideas?

Thanks in Advance!

Hi!

I'm trying to use SerialPort as a parameter for my other classes constructor:

serial1 = new SerialPort(SerialPorts.COM1, Constants.baud_cam, Parity.None, 8, StopBits.One);
serial1.DataReceived += new SerialDataReceivedEventHandler(camera_DataReceived);
serial1.Open();
Ucamttl camera = new Ucamttl(serial1);

Ucamttl class:

SerialPort serial;

    public Ucamttl(SerialPort sp)
    {
        serial = sp;
    }

I can't seem to use the serialPort in my Ucamttl class. It works well in the main routine though.
The error occurs when the ucamttl class tries to write to the serial ( serial.Write(_command,0,Constants.CMD_SIZE); )

    #### Exception System.NullReferenceException - CLR_E_NULL_REFERENCE (1) ####
    #### Message: 
    #### Thermocam.Program::SyncCam [IP: 0007] ####
    #### Thermocam.Program::Main [IP: 008d] ####

Since I'm a noob there are a lot of questions..
- In which class do i need to open the port?
- In which class do i need to implement the event handlers?
- and if, then how, and why?

Thanks for helping!