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Can you over-feed a dog?
I'm running an ATSAML11 (Cortex M0+) and FreeRTOS with WDT enabled.  I was getting sporadic WDT resets, which I traced to this code: static int initiate_tx(const uint8_t *...
Friday, 18 September 2020 - 18:36
Are PORT pullups available when the port is assigned to another function?
On our SAME54 project, I just instructed our HW engineer to remove the external pullups for the SD/MMC.  My reasoning is twofold, but possibly misguided:   I've read...
Thursday, 27 August 2020 - 19:00
START generating incorrect tc.c for PWM?
Goal:   I want to generate a single-slope PWM signal on PD0 of my ATxmega16D4.   Issue:   Atmel START appears to be generating incorrect code, in particular, not...
Sunday, 23 August 2020 - 00:27
printing peripheral registers using debughooks.py
I'm trying to dump the contents of peripheral registers in a SAML22.  With help from a few previous threads (mostly guided by meolsen's steady hand):     ...
Sunday, 16 August 2020 - 04:43
debughooks.py problems...
(UPDATE: this started as a question about dumping all the peripheral registers, but has morphed into a potentially more useful question about creating a simple debughooks.py...
Saturday, 15 August 2020 - 05:11
SAMD21 fails to wake from STANDBY sleep
Note: this is clearly related to SAMD21 (SAMD21E16B) sporadically locks up and does not wake up from STANDBY sleep mode but this example *always* locks up and does not involve...
Wednesday, 12 August 2020 - 14:43
wake from sleep with and without debugger
On my ATSAMD21 Xplained Pro board, I have a relatively simple program that drives the RTC from the OSCULP32K and does the following: sets the RTC COMPARE register for 1 second in...
Monday, 3 August 2020 - 13:24
Creating a custom serial driver w/o modifying ASF4 files
This may be a fool's errand, but I'd like to create a custom serial driver (more on that in a moment) and I'd prefer not to monkey patch any of the ASF4 / START source files....
Wednesday, 29 July 2020 - 03:45
SAMD21 has insomnia [Solved]
Problem statement: I want my SAMD21 to wake on an RTC (match) interrupt or EXTIRQ button push, but it continues immediately from the __WFI statement.   My hunch is that there...
Saturday, 18 July 2020 - 21:58
SAMD21: setting RTC COMP clears READREQ.RCONT (!?!)
This is related to:      https://community.atmel.com/foru...   It appears that simply setting the RTC COMP register using the ASF4 api clears the RTC.READREQ....
Saturday, 18 July 2020 - 20:26
Wake from STANDBY upon receiving a character?
I have a nagging suspicion this has been asked before, but:  Is there a way to wake the processor from STANDBY state on a USART received character AND not lose the character...
Sunday, 5 July 2020 - 21:13
Can two Event Generators trigger one Event Channel?
Can two Event Generators trigger one Event Channel?  Or -- more or less equivalently -- can two Event Channels trigger the same action in an Event user?   In my case, I...
Monday, 25 May 2020 - 04:53

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