6 Commits

Author	SHA1	Message	Date
Hauke Petersen	a93f15b5cb	cpu/samd21: adapted UART driver	2015-10-27 14:59:38 +01:00
Hauke Petersen	1a29163b63	cpu/samd21: optimized UART implementation	2015-09-14 17:20:01 +02:00
Hauke Petersen	164721657d	cpu/samd21: added cpu clock configuration ... - choosable between PLL and internal 8MHz osciallator - configurable to a wide range of frequencies	2015-06-04 11:58:26 +02:00
Joakim Gebart	13832d8e62	everything: Remove filename from @file Doxygen command	2015-05-22 07:34:41 +02:00
Hauke Petersen	e7fbaf3815	cpu: removed NAKED attribute from ISRs ... - removed the __attribute__((naked)) from ISRs - removed ISR_ENTER() and ISR_EXIT() macros Rationale: Cortex-Mx MCUs save registers R0-R4 automatically on calling ISRs. The naked attribute tells the compiler not to save any other registers. This is fine, as long as the code in the ISR is not nested. If nested, it will use also R4 and R5, which will then lead to currupted registers on exit of the ISR. Removing the naked will fix this.	2014-10-30 19:33:32 +01:00
Thomas Eichinger	bf256f63a3	samr21-xpro: initial import for the samr21-xpro board	2014-09-25 14:37:47 +02:00