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Enabling OC1B output on a Tiny85. With regular Mega or Tinys, you just make DDRx.y an output for an OCnx pin, and set the COMnxy bits for your specific output mode. OC1A and OC0A... |
Friday, 19 September 2014 - 15:23 |
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Reading Pixels from GRAM memory in ILI9341 and ILI9325 I composed this reply to a question from "lekter" that was deleted while I was typing: So I thought that I will post it myself. uint16_t readPixel(int16_t x, int16_t y) {... |
Sunday, 13 April 2014 - 10:28 |
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ATtiny2313A, ATtiny4313 and RSIG in SPMCSR The old tiny2313 could read fuse and lockbits but not Signature/Calibration bytes. When the tiny4313 came out, RSIG is shown in the "24. Register Summary" in the shared "... |
Tuesday, 10 December 2013 - 15:40 |
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TFT Colour LCD controllers with SPI interface I have been playing with a very nice 320x240 display on an Arduino shield. It uses a ILI9320 controller and its 8-bit interface. Other displays use 16-bit i/f have a 20x2 pin... |
Tuesday, 12 March 2013 - 14:32 |
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ENC28J60 Web server from SD Card I have got a web server running quite successfully with a Wiznet W5100 Ethernet chip. It serves files with long filenames on a FAT16 microSD memory card. I thought that I should... |
Saturday, 8 December 2012 - 23:54 |
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Populating Dataflash on Xmega128-A1-Xplained board The new Xplained board is unpopulated, but has pads for AT45DB or AT25DF chips. As far as I can see AT45DB chips are only in leadless packages. The AT25DF come in SOIC-8. There... |
Wednesday, 25 July 2012 - 14:50 |
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What is the point of a User signature array? This question is posed as a general question. Regular AVRs have Flash, Eeprom, Signature and Calibration memory. Xmegas have additional "User Signature Row" area. They also have... |
Friday, 24 June 2011 - 18:43 |
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Building USBasp to run on a 16MHz Arduino The package expects to run on a mega48 or mega8 with a 12MHz crystal. The usbdrv docs say that you can use a 16MHz crystal. It includes the relevant 16MHz ASM code according to... |
Thursday, 7 October 2010 - 21:38 |
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Debugging COFF and ELF files I have recently been building the same program with avr-gcc, CodeVision, ImageCraft and IAR. I built the GCC and ImageCraft versions via the Studio IDE. CodeVision in its own... |
Thursday, 17 June 2010 - 13:56 |
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How fast can a SPI slave reply? Using a microcontroller as an SPI Master is very straightforward. You can send commands directly to a hadware slave at full speed, typically 4MHz for a 16MHz clock. So the... |
Sunday, 25 April 2010 - 15:23 |
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mega8535. What is the point of this device? As far as I can see, the mega8535 was an upgrade to a 90S8535. The mega16 does everything that the mega8535 does. And with JTAG. The mega164PA does even more. And is... |
Thursday, 1 April 2010 - 14:26 |
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Placing anonymous strings in flash with IAR compiler. I am using the IAR KickStart freebie edition. The compiler defaults to writing anonymous strings to SRAM, and consequently uses up all the SRAM in a Tiny2313. printf("this... |
Sunday, 24 January 2010 - 21:59 |