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Is there a way to initiate a SPI read without writing data? Tri-state SPI pin
Hi All.   Using an atmega328 and some arduino libraries.   I am using a lm95071 temperature sensor, it uses one pin for both MOSI and MISO. It has two phases, read data...
Thursday, 16 April 2020 - 21:16
Program flow stopping from some odd interrupts.
Hi all,  I have some code that is only utilizing UART0 and UART1 on a atmega644pa. I am sending commands to a cellular modem and utilizing an interrupt and ring buffer to...
Wednesday, 29 January 2020 - 21:14
Interrupt driven USART only transmitting one character and garbage afterwards
  Hi all, Using an atmega644pa, 16Mhz, 5V   I followed the interrupt driven USART receive tutorial which seems to be working for one character at a time. @ 115200 baud...
Monday, 8 July 2019 - 19:00
I2C troubleshooting
Hi all, ATmega644pa, 16MHz, 5V I've been trying to write some i2c code for some sensors I have on my board but cannot get anything to work. I know it is wired correctly...
Tuesday, 2 July 2019 - 14:11
Software UART Recieve only on AVR
Hi all,   I am encountering a memory leak of some sorts (Proabbly from arduino String) so I am doing a total code overhaul on my avr. ATMEGA644PA@ 5V,16MHz   This means...
Friday, 28 June 2019 - 22:52
Printing a float to the USART with at least 5 decimals
Hi All, I am trying to print a float to the serial monitor and am having so much trouble. ATMEGA644PA@ 5V,16MHz Baud rate is 115200 transmit_USART0 works fine but I want to print...
Friday, 28 June 2019 - 17:18
ATMEGA644PA _delay_ms() super slow
Hi all https://imgur.com/a/eb4cLXU This is my circuit on my PCB I am having a problem with delay_ms going super slow.  #include <avr/io.h> #include <util/delay.h...
Friday, 25 January 2019 - 00:21
How to use PB2 on ATMEGA644PA as a software UART RX PIN?
Note: I am new to avr programming. I know C and C++ but haven't gone outside programming an Arduino, it's my first attempt. I have been testing all of my code with a break out...
Wednesday, 12 December 2018 - 18:50