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ATSAMD & SD SPI or SPI FLASH
Hello. In the datasheet of ATSAMD20J18 it states the following:   7.3.2 I/O Pins After power-up, the I/O pins are tri-stated.     As far as I know, a tri-stated pin...
Sunday, 7 October 2018 - 18:09
SAMD20 decoupling capacitors
Hello I have the following schematic: The Bosch BMF055 MEM actually contains an ATMEL SAMD20J18A cpu embeded in it. The circuit is powered by a LiIon battery. Lately I am...
Sunday, 2 September 2018 - 17:38
SAMD20 not recovering from deep sleep
Hello. I have an ATSAMD20 which I enter sleep mode around every 1 second for some 900 milisec. The processor operates correctly for a couple of hours and then it suddenly stops...
Thursday, 30 August 2018 - 09:19
SamD20 SysTick & sleep
Hello. I have an ATSAMD20J18 cpu. Is the SysTick interrupt operating when I enter into a Sleep mode?   system_set_sleepmode(SYSTEM_SLEEPMODE_IDLE_0); system_sleep(); ...
Tuesday, 5 June 2018 - 15:48
ARM...ing your madness!!!
Hello. I am not sure if I do something wrong but I am getting crazy!   I have the following 'binary' search in an array (screenshot bellow):   If you see, I compare...
Friday, 25 May 2018 - 11:39
Samd20 wake up on usart
Hello. Is it possible that the ATSAMD20 can wake up somehow from deep sleep mode when it receives data from the USART? If yes, where should I look at for more information? In any...
Sunday, 20 May 2018 - 09:51
USART read problems
Hello, I have the following code: while (true) { uint16_t data; enum status_code status = usart_read_wait(&usart_instance, &data); if (status ==...
Saturday, 5 May 2018 - 19:59
Need help on SAMD20 Event System
Hello. I am running the example program EVENT_QUICK_START_HOOK for the SAMD20 and I have some questions. Inside it it configures an Event User with: #define CONF_EVENT_USER...
Sunday, 11 March 2018 - 23:07
ARM ASF tutorials
Hello. Is it anyone aware of any web page that contains tutorials and/or example programs for ASF? I am mostly interested for interrupts and events. The example programs from...
Wednesday, 7 March 2018 - 19:17
SD card issues
Hello. I run the FatFS example program and I have initialized the SD card interface on a SAMD20 with these parameters: #define SD_MMC_SPI         ...
Sunday, 4 March 2018 - 10:51
SAMD20 RTC
Hello. I have the following code (in my conf_clocks.h) /* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */ #  define CONF_CLOCK_OSC32K_ENABLE ...
Wednesday, 21 February 2018 - 12:58
Atmel Studio & Atmel ICE debugging problem
Hello. I have an installation of Atmel Studio 7 on a Windows 10 x64 system. I also have an Atmel ICE debugger. When I try to debug any program on a custom board with an...
Sunday, 18 February 2018 - 09:12

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