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Atmel AS7 ARM C Preprocessor directives missing #error?
Thanks.  My problem was actually that I was testing the value of an enumeration that is implicitely assigned a value so the preprocessor didn't do the test the way I expected...
Wednesday, 17 January 2018 - 19:49
Atmel AS7 ARM C Preprocessor directives missing #error?
Nevermind; I guess it does. 
Wednesday, 17 January 2018 - 18:03
can't get ASF USB driver to work
Maybe this thread will help you...   https://community.atmel.com/forum...    
Friday, 12 January 2018 - 13:21
G55 Clock Selection
There are two PLLs in the part.  Based on the datasheet they have different ranges.  So, you can use one (PLLA) for 120MHz and the other (PLLB) for 48MHz for USB. ...
Wednesday, 10 January 2018 - 17:12
G55 Clock Selection
I recently struggled with the G55 and USB but had success.  Using the internal 32KHz does not seem to work since the clock is not precise enough to generate the 48MHz clock....
Wednesday, 10 January 2018 - 16:09
can't get ASF USB driver to work
I was recently (in Dec 2017) able to get the USB CDC echo working with the SAMG55 eval board and then on my custom board also.  I too used the newer Atmel START/ASF4. ...
Wednesday, 10 January 2018 - 14:43
USB CDC Echo example project not working
I finally got back to this project and was able to get the example to work by doing two things. My hardware is the ATSAMG55 XP board using ASF4/START.  I see some new changes...
Monday, 20 November 2017 - 14:21
SAM4s SPI Mode 3 - Use ASF or Bit-bang the interface?
For SPI devices, there is the separate MISO and MOSI signals so I think the MISO is taking data even when master writes to slave.  So the receive buffer gets filled...
Monday, 23 October 2017 - 16:28
I2C MAsync with SAMG55 working strangely (solved)
I have found that the auto-generated code from START/ASF4 has a problem where the function _i2c_m_async_transfer generates an interrupt as soon as the interrupt mask is enabled...
Thursday, 12 October 2017 - 17:57
SAM4s SPI Mode 3 - Use ASF or Bit-bang the interface?
But I suppose it depends a bit on whether the ADC is truly early or mid-way in the 3 inch run or if it is very near the end point.  If all the spi clock loads (devices) are...
Thursday, 12 October 2017 - 14:31
SAM4s SPI Mode 3 - Use ASF or Bit-bang the interface?
Whether there is a runt pulse there or not will depend on where on the 3.1" trace you put the scope probe.  There may be only over/undershoot at the end but there might be a...
Thursday, 12 October 2017 - 14:26
SAM4s SPI Mode 3 - Use ASF or Bit-bang the interface?
In that case, you may want to try an RC termination on the spiclk signal at the end device.  First try values are typically about 100 ohm and 47pF.  That should prevent...
Thursday, 12 October 2017 - 13:20

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