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OctOS: a minimalist preemptive multi-tasking "OS" for AVR Last fall I wrote a multitasking system for AVR micros. My goal is to shoehorn solid capability into a small space. I have no specific questions, just looking for... |
Friday, 28 August 2020 - 15:24 |
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mega4809 crystal calibration problem: status report Hi All, ka7ehk started a thread here looking to calibrate the mega4809 crytal using the RTC.CALIB register. You have a 32768 Hz crystal connected (to the RTC... |
Saturday, 22 August 2020 - 01:47 |
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mega4809 RTC PIT scaling for events not what I expected As stated in another thread, I have been working with the Microchip 4908 Curiosity Nano to pipe the RTC PIT, clocked by the external crystal, to TCB0 using the event system.... |
Sunday, 16 August 2020 - 18:48 |
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nano curiosity 4809: TCB0 FRQ mode not getting capture value Hi All, I've made progress on working with clocks on the mega4809 on the Microchip Nano Curiososity board. I have the 32768 Hz external crystal driving... |
Friday, 14 August 2020 - 20:17 |
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nano curiosity 4809: can't enable ext 32.768 kHz oscillator Hi All, I have a Nano Curiosity 4809. I was trying to get the RTC working with the external crystal but I'm failing. I trimmed down code to enable the oscillator and... |
Tuesday, 11 August 2020 - 15:12 |
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Q on mega 0-series TWI slave protocol Hi All, I'm working on a state transition diagram for slave mode I2C software. I've started with the read part. See diagrams below. Here is the question... |
Tuesday, 16 June 2020 - 19:33 |
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cheap, small logic analyzer DId a search for logic analyzers. Last thread was 2013. I'm thinking of this USB one from inno, listed on Amazon as the Inno Maker LA1010 USB for $79. ... |
Wednesday, 5 February 2020 - 02:00 |
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trying TWI on Nano Curiosity 4809 I'm putting together a small protoboard project to read a MPU-6050 based gyro using I2C (fast mode). (I previously was able to do I/O using a Arduino Uno 3 w/ 328p. ... |
Saturday, 18 January 2020 - 22:28 |
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notes on fixed versus floating point I have no specific questions or requests for comment here. I thought some peeps here may be interested. In another thread I started a project which involves designing... |
Monday, 23 December 2019 - 19:54 |
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avr-gcc generates no useful code for simple function I wanted to see if avr-gcc supports alloca so I generated a little function file and peered at the assembly. To me this is not dead code, but the assembly does nothing. ... |
Friday, 13 December 2019 - 14:21 |
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my gcc8 built toolchain w/ ATmega DFP 2.0.12 not working for 4809 I'm working with the 4809 nano curiosity. I had a routine to print a string constant. It failed. I traced it to the string constant not existing in sram. Looking... |
Thursday, 28 November 2019 - 02:52 |
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can't get uart comm going on nano curiosity (w/ mega4809) I'm trying to get things going on a Microchip nano curiosity board w/ atmega4809 chip. Code is posted below (where compile line includes -DBAUDRATE=9600). I first run... |
Monday, 25 November 2019 - 22:21 |