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Integrated USB Serial emulation and Boot Loader
I know USB Serial port emulation is possible using any Atmega micro controller (V-USB, LUFA). USBASP is one of them commonly used. I would like to know is there a boot-loader...
Friday, 11 March 2016 - 05:00
Interfacing MFRC522 to 5V processor
I had interfaced MFRC522 RFID module to atmega nano. It worked fine. But I got a doubt now about the issues related to levels of MISO, MOSI, SDA etc pins. When my port pins are...
Wednesday, 9 March 2016 - 13:33
Slave Select behavior when configured as Master - Atmega328P
I was looking at Atmega328P datasheet (page number 162)   Please let know if my understanding below is correct. Referring to table Table 19-1 in the datasheet, when...
Monday, 7 March 2016 - 09:58
Unable to integrate SD Card Library with Atmel Studio
I wanted to integrate SD card library with Atmel Studio 7 so that I get luxury of using good IDE. So I got Arduino libraries (friendly wrapper for sdfatlib)in https://github....
Sunday, 6 March 2016 - 13:14
UART Commands for MFRC-522
Hello, I got RC522 RFID reader from Ebay. Before I write any C code in Atmega328 (UART interface), I thought of communicating with it from my terminal software (I have USB to...
Monday, 15 February 2016 - 15:16
MCP23017 I/O port status read issues
I interfaced MCP23017 to AVR328P. But in the attached code in main.c, GPB2 is pulsing. I expect it to be low always. That means if I read the current GPB status and and use &...
Wednesday, 27 January 2016 - 10:18
4x4 Keypad Code
I have written code for 4x4 keypad. Attached is the zip file with complete project solution. I just have one doubt about the correctness of the code getKeyStatus() function....
Tuesday, 26 January 2016 - 13:28
UDR Flushing on read
I had written ISR for USART receive. I was not very sure if readng UDR empties the contents. In atmel manual I could not find exact behavior when I looked briefly in couple of...
Friday, 22 January 2016 - 15:53
LED lights up without configuring I/O port as output
I wrote below code and I was surprised to see LED turning ON/OFF with good brightness. Basically I had typo in port initialization and it should have been DDRB. By not configuring...
Tuesday, 12 January 2016 - 15:24
unable to navigate to declarations of avr core header files in codeblocks
I have successfully setup codeblocks for avr. I am able to build and run the projects. But the problem I have is I can not right click on a variable (Ex: DDRB) and find its...
Sunday, 10 January 2016 - 03:39
Max frequency we can get in 328P I/O pin
I just wanted to get around 5MHz pulse in Uno board (Any pin). I wrote the following program using Atmel Studio 7 in main (Without any other programs or initialization). But the...
Saturday, 2 January 2016 - 07:36
Getting Linker Error even though .o file is present
Today I created a project with basic minimum files of arduino core for arduino nano board. I just want to create a project with few arduino files, but without core.a library from...
Friday, 1 January 2016 - 06:56

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