4 ms·

I have worked with DD and have some DA laying around. The UPDI is a very nice and simple programming interface. All that it takes is a USB-UART and a diode or a

by _benj 2y ago

I have worked with DD and have some DA laying around. The UPDI is a very nice and simple programming interface. All that it takes is a USB-UART and a diode or a resistor (I used a diode) to connect between RX/TX. I didn’t used ATmega a lot, but comparing the experience to MSP430 and EFM8 the AVR chip has a bunch of niceties, superb documentation and life improvements like, in order to clear some registers all one need to do is write 1 instead of the whole =& ~(REG | 0x8) (or something like that, it’s been a while since I write embedded C) The other thing that I loved is that one can download headers for the chip directly from the manufacturer! Way too many chip manufacturers keep locking headers/libraries behind their proprietary IDEs, but Microchip, even though they have an IDE let’s you download the headers so one can use whatever tooling one is comfortable with! Props to Microchip for that!!

lloydatkinson 2y ago
How’s debugging and breakpoints for these?
- _benj 2y ago
  I don’t remember having used a debugger with these, so I couldn’t tell you how was that experience
- violet13 2y ago
  UPDI has robust on-chip debugging capabilities.
Mister_Snuggles 2y ago
> life improvements like, in order to clear some registers all one need to do is write 1 instead of the whole =& ~(REG | 0x8) (or something like that, it’s been a while since I write embedded C) This is a really interesting feature since it addresses a shortcoming of the C language (inability to easily express bit set/clear) by introducing a new hardware feature.
- garaetjjte 2y ago
  SBI/CBI only allowed changing one bit, new registers allow for multiple bits and also toggling them.