Matrix user forums

We have checked for this problem, but can not reproduce the fault.

The 10ms delay should not be required.

If you can send us a copy of the program, we will try to locate the cause of the second character.

The MIAC ADC clock is set to the RC option. This completes a conversion in approximately 20uS. In addition there is an initial sampling delay of approximately 20us. If necessary, both of these settings can be changed using the Custom Code feature in Flowcode V4. The settings can be accessed in the I...

If the definitions were being edited in the code customization window, Flowcode will have registered the edit and be including this version of the defines code along with the new version provided by the custom c file. You could try deleting the contents of the custom code window. This should force F...

Compilation succeeds if intedg0 is changed to INTEDG0. I am not able to do any hardware testing at the moment. If it's any help, the original MIAC RC5 article program contains the same basic receiver program (written in Flowcode) and compiled for the 18F4455. Timing and timer configuration details m...

The 877 OPTION_REG is used to swap signal edge causing an INT interrupt (so every edge is detected). This feature is available in the INTCON2 register of the 4455. The timer values used in the state machine macro will depend on the clock frequency and prescaler being used with TMR0. the timer should...

The driver required by AVR Studio is part of the AVR Studio installation. We are not able to re-distribute these files, but downloads and updates are available from the Atmel website: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=2725 After uninstalling the Libusb driver and re-connecting...

Hello, This appears to be a driver problem. There are two common drivers for the AVRISPmkII wihich we have found to be incompatible. Your information indicates that the AVRISPmkII programmer is using the Libusb driver. This is supplied with many 3rd party AVR development tools that use the AVRDUDE p...

The servo component in V4 versions of Flowcode (AVR,PIC and ARM) is an improved version of the original example program. It automatically adjusts to accommodate a wide range of target devices and clock speeds.

See this thread for a description of the naming convention used when accessing Flowcode variables from C (no simulation)

http://www.matrixmultimedia.com/mmforum ... cv_#p12745

The PIC16F690, and other similar devices, can not be used for this method of servo signal generation because they only have one CCP module connected to TMR1. There are probably alternative methods of generating servo signals using the timing facilities available in the 16F690 (especially if fewer th...

Hello, WinAVR is not part of AVR Studio, so it must be installed separately. AVR Studio then needs to locate WinAVR so it can be used as an external tool. To make sure AVR Studio has located WinAVR, the path can be located in the following menu: Project -> Configuration options -> Project options ->...

I have downloaded your program and sent it to several devices. All worked when configured correctly. 1. One common problem, especially with string functions, is the Extended CPU Enable option available with some devices. This regularly causes problems when enabled and should be disabled unless the t...

Here is a new version of the PIC_CAN2.c file used by Flowcode for PIC V4. The extended address commands now operate correctly with MIAC.
This file needs to be copied to the Components folder of the Flowcode V4 installation - overwritting the original file.

We have been able to reproduce your results and are looking into the problem.

Thanks for the feedback on the patch. I will make sure all the other device files are updated correctly.

Yes, I was at Elektor Live. I hope you enjoyed the show.

All our avatars have now been changed to photos (I hope they don't deter other forum users).

Article: http://www.matrixmultimedia.com/article.php?a=48

If you have any questions for the author or comments on the article, please post them below.

Hello, The error mesage you included indicates that Flowcode is unable to locate the batch that controls compilation. As a result, the compilation process is being terminated before Flowcode attempts to access the AVRISPmkII driver. The batch file in question (avra.bat) should have been installed in...

The file does seem to have been corrupted. Here is a fresh copy: avrispmkii driver.zip Flowcode V4 AVR does support the different programming tools better than V3 did (when the original download was posted). Installation of this driver might not be necessary if the current default drivers are workin...

The latch signal for the WM8716 should be a single pulse at the end of the 16-bit data transmission (2 x byte transmissions). The latch signal is normally high, and pulsed low for a short period to latch the data. Various SPI devices have different requirements for the 'strobe/latch/chip select' lin...

There is another point to consider when using the default BoostC compiler for the PIC devices. Floating-point calculations are handled by function calls, so the calculation will need to be re-written into the following form: Calculate = fmul(int2float(adc1), 2048.0) Calculate = fdiv(Calculate, 1024....

Hello,

The changes to the ECIO base board have been made to improve the distribution of the power supply voltage for all possible options: External PSU, USB power, 5V microcontroller, 3.3V microcontroller (ECIO ARM).

Hello, The latch signal appears to be similar to the standard Chip Select (/CS) used with most SPI devices. the Flowcode SPI macros for the devices supported by the EB-013 SPI board (DAC and NVRAM) contain the appropriate chip select control. All other devices can have this function provided by simp...

Hello. There are some differences between the representation of variable and calculations in the PC simulation and the C code downloaded to the microcontroller. The main calculation illustrates two issues with the way programs handle calculations. 1. A C compiler sometimes needs to be forced to use ...

Hello,

The device illustrated is an atXmega128A1.

The Xmega range of devices are not compatible with the mega range, and are not currently supported by Flowcode.

Here is a new FCD file for the AT91SAM7S321. The original seems to contain an error in the initialization of the IRQ1 interrupt.
If you copy the attached file into the FCD folder of your Flowcode installation (overwriting the original) it should solve the IRQ1 problem.