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Simple & clean power selection between two 5V sources
I have a circuit that can be fed from one of two USB connectors (power only no interface). There might be voltage present at none one them, one of them or both. I would like a...
Monday, 11 June 2018 - 16:06
Code jumps while debugging?
I'm using an Atmel ICE with an Arduino Uno board (not using it as Arduino). The MCU is ATmega328p. When starting a debug session, after hitting F11 the instruction which I jump to...
Monday, 14 May 2018 - 22:14
ATmega3209/4809 - y u no upgrade adc?
Seriously... The whole AVR-1 series (or however they call it) is a great step forward. Writing code tiny devices was a welcomed step forward. Jamming the new chips with the logic...
Monday, 7 May 2018 - 19:33
Atmel ICE JTAG interface can not connect
Since yesterday it seems that I can not connect to any target using JTAG interface. I did manage to connect with PDI & ISP however JTAG won't work. I have tested several board...
Friday, 4 May 2018 - 05:02
Multi battery charger & DC-DC boost regulator module?
I imagine many are families with these 2:1 modules from Aliexpress that do both battery charging (single cell lipo) + DC-DC converter booster to keep the output at a steady...
Tuesday, 24 April 2018 - 18:25
Using a pro mini module as a breakout board - code not executed
I have a clone of the Ardiono pro mini and I'm trying to run some code on it. I can connect, burn and verify the code - however it will not execute. Any suggestions?
Sunday, 8 April 2018 - 16:14
Correct usage of macros for selective compiling
I need to port code between two AVRs, I would like to keep using the same files and just compile the required init for different modules according to the selected AVR model....
Saturday, 31 March 2018 - 17:25
9 bit SPI on ATmega
I'm trying to interface with an LCD that requires a 9th bit before the data byte (to indicate if content is data or command). What would be the best way to implement this?...
Thursday, 29 March 2018 - 18:56
Multiple headers including a 3rd header file - best practice?
Let's say I have a header file SPI.h which holds declarations for SPI functions and it included in two other header files: LCD.h & SRAM.h.   In main.c: ... #include LCD....
Tuesday, 27 March 2018 - 09:08
Make SPI large transfers more efficient?
Using an ATtiny816 with serial RAM by Microchip. I need to store large amounts (relatively speaking) on the external RAM and read back large amounts of data. The data is generated...
Monday, 19 March 2018 - 09:01
ILI9341 Vertical scrolling bug in software - but where?
I'm writing text to an LCD, new text appears on the last line of the LCD. The content is shifted upwards by the same number of lines as the new text. In order to make sure the...
Monday, 5 March 2018 - 01:59
How to avoid this ESP8266 / LCD / AVR UART glitch easily?
I have a PCB with an ESP8266 + graphic LCD and an ATtiny816.   The init phase on the main file looks like so: int main(void) { CLOCKSet20MHZ(); UARTInit(); SPIInit();...
Friday, 2 March 2018 - 09:32