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No IRQs generated for Mega128 Timer0 if XDIV is used
This topic came up on the CodeVision Yahoo forum about a Mega64. There is a TIMER0_COMP interrupt and a TIMER1_OVF interrupt and the system clock is divided by 4 using the XDIV...
Friday, 24 July 2009 - 17:41
Avrdude: usbdev_open() did not find any USB device "usb
I can connect and program JTAG devices using my JTAGICE-mk2 via Studio4 or CodeVision. But when I try to use: avrdude -p m128 -c jtagmkii -v -P usb I just get an error:...
Thursday, 21 May 2009 - 13:44
I have damaged a STK600
I have an XPLAIN board connected to a STK600 via its JTAG header. (the STK600 supplies 3V via VTG on the JTAG header). I programmed the AT90USB1287 via the JTAG in the normal...
Tuesday, 5 May 2009 - 10:49
Rowley CrossWorks AVR C Compiler and PSTR()
The PSTR() macro is commonly used with avr-gcc to place anonymous strings in flash. e.g. printf_P(PSTR("This string is in flash\n")); You can re-arrange the macro for...
Thursday, 12 February 2009 - 10:20
AVR307 USI Uart but with Tiny85
AVR307 code is written for a Tiny26 and IAR C. I have ported the code to both CodeVision and avr-gcc quite easily. However I cannot get the code to run. As far as I can see, a...
Thursday, 8 May 2008 - 23:38
Consistent delays do not really need optimisation
The avr-gcc _delay_us() macros cause an awful lot of grief in this forum. I do not think it is really necessary. This example shows the results that can still be achieved with...
Wednesday, 23 April 2008 - 15:10
How do you stimulate the UART in Studio4
I can see how you stimulate a regular i/o port with the stimulus file. Is it possible to get UART input ? Or would I have to produce the actual start bit... stop bit on the RXD...
Sunday, 6 April 2008 - 08:31
Batron Graphic LCD Display uses STE2004S driver chip
I am having difficulties with this driver chip made by ST Microelectronics. It is possible to send commands via TWI or SPI and the chip generates its own LCD drive and bias...
Tuesday, 9 October 2007 - 16:38
gcc copying anonymous literals to SRAM
When gcc-avr encounters an anonymous literal like printf("David"), the "David" is copied to SRAM so that printf() is always passed a SRAM address. I would have assumed that:...
Tuesday, 17 July 2007 - 17:38