I have successfully written on the serial port to the Arduino board from PD . Some tips:
- connect the board before running PD (or the comport external)
- close the Arduino IDE before running PD
- is their a security/permission issue where you can read the
(usb-serial) driver and not write it?
- are you using the USB version of the Arduino board?
- setting comport with the proper settings?
- do you get any error messages once you start comport?
Tom
On 4/25/06, Hans-Christoph Steiner hans@eds.org wrote:
On Apr 25, 2006, at 5:54 PM, Hans-Christoph Steiner wrote:
On Apr 25, 2006, at 4:23 PM, Mathieu Bouchard wrote:
On Mon, 24 Apr 2006, Hans-Christoph Steiner wrote:
I am trying to write data from Pd to Arduino. Has anyone used [comport] to write out serial data before? Any example patches? I can only get TX_OVERRUNS errors.
If CTS/RTS pins aren't connected properly then the computer's UART might be supposing that the device is not there and so it will accumulate data until the buffer overflows, a situation which gets trapped and becomes a TX_OVERRUNS.
No data ever gets thru when writing to the serial port, and on reading works fine as it is. So I don't think CTS/RTS is required. Its not used on GNU/Linux or Mac OS X.
I am pretty sure I have found the problem:
#ifdef WIN2000 0, #else FILE_FLAG_OVERLAPPED, #endif
By default, this object is compiled with the FILE_FLAG_OVERLAPPED mode, which enables asynchronous writing to the serial port. But none of the Windows code is written to use the OVERLAPPED struct, which is required when in async mode. Therefore, no data gets written.
But there is a exceedingly simple solution: remove the WIN2000 hack all together and just use with sync mode, which is what the code is doing anyway. But I don't have a Windows machine to test this on right now, any volunteers?
.hc
"Computer science is no more related to the computer than astronomy is related to the telescope." -Edsger Dykstra
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