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SAMD21 i2c unable to read MCP23017
Hi,   I am using a SAMD21 xplained pro with the ASF SERCOM i2c - Master Mode I2C (polled API) driver to read and write to a MCP23017 i/o expander. I am able to successfully...
Sunday, 16 April 2017 - 18:21
SAMD21/SAMR21 xplained Pro GPIO tutorial
I started putting together some tutorials on the SAMD21/SAMR21 xplained Pro boards. The tutorials cover a lot information from board/hardware specific configuring to how to...
Saturday, 18 March 2017 - 11:49
View Emulated EEPROM in debug mode
I am using the Emulated EEPROM driver (ASF) on the SAMD21 xplained pro (SAMD21J18A). The Emulated EEPROM is stored at the top of the FLASH memory, which I know to be below address...
Monday, 6 March 2017 - 20:15
SAMR21 Flash Size Question
This might be a dumb question, In the SAMR21G18A Datasheet, it says that the flash size is 256k with 4096 pages and each page size is 64 bytes: If I do the math, 4096 X 64 = 262,...
Wednesday, 1 February 2017 - 11:01
Issue displaying images on SSD1289 TFT
I am posting to the AVR Freaks because I believe my issue relates to general programming rather then the platform I am running my project on (SAMD21).   I've been porting my...
Saturday, 17 December 2016 - 19:48
Add string to array dynamically
I am using the FatFS library to scan a directory for images. When I find the image name, I want to store the file name in an array. How do I add string to array dynamically?...
Sunday, 4 December 2016 - 14:19
SSD1963 Calculating Number of Pages in Buffer
I have a SSD1963 TFT 480X272, which calculates to 130,560 pixels. The datasheet says there are 1215K bytes built-in SRAM inside SSD1963 to use as frame buffer.   The display...
Wednesday, 16 November 2016 - 01:08
SAMD21 Only change 8 bits in PORTA Register
Hi,   I need a sanity check. I want to change the values of PA02 thru PA09. The below example is a sample of a larger bit of code. I am trying to Isolate a bigger issue....
Thursday, 3 November 2016 - 14:01
AS7 - Atmel Studio is Busy
I have just recently built a new PC. My old Laptop was slow. AS7 would take forever to load but for the most part was pretty stable. My new PC is a beast and should be able to...
Sunday, 18 September 2016 - 17:50
SAM4S SPI Clock and SS issue
I have SAM4S xplained Pro. I am trying to get a simple SPI example working. I am finding the ASF examples for the SAM4S to be a bit obscure, but I am making progress. With the...
Saturday, 27 August 2016 - 16:18
SAM4S xplained Pro enable interrupt on SW0
On my SAM4S xplained Pro, I am able to set up an interrupt on PIO_PA14. The pin is normally LOW and when pressing the button, the pin is pulled UP.   The SW0 button on...
Sunday, 21 August 2016 - 14:17
SAM4S - i2c/twi gets stuck on twi_master_write
I've been working on this for a couple of days now. I am trying to get i2c working on my SAM4S xplained Pro. In the code below, it gets stuck in   twi_master_write  I'...
Wednesday, 17 August 2016 - 13:57

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