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19573: cpu/stm32/periph_dac: small improvements r=maribu a=gschorcht ### Contribution description This PR provides the following improvements for `periph_dac` on STM32 - Support for `RCC_APB1ENR1_DAC1EN` symbol added. - For boards that have not connected the V_REF+ pin to an external reference voltage, the VREFBUF peripheral can be used as V_REF+ (if supported) by setting `VREFBUF_ENABLE=1`. - If the DAC peripheral has a mode register (`DAC_MCR`), it is set to normal mode with buffer enabled and connected to external pin and on-chip peripherals. This allows to measure the current value of a DAC channel with an ADC channel or to use the DAC channel also for other on-chip peripherals. ### Testing procedure - Green CI - `tests/periph_dac` should still work for any board supporting the `periph_dac` feature. ### Issues/PRs references 19579: doc/doxygen/src/flashing.md: work around Doxygen bug r=maribu a=maribu ### Contribution description Doxygen fails to render inline code in headers correctly in the version the CI uses. So, work around the issue by not typestetting `stm32flash` as inline code but as regular text. 19583: tests: move cpu related applications to tests/cpu r=maribu a=aabadie 19584: tests/build_system/external_board_dirs: fix broken symlinks r=maribu a=aabadie Co-authored-by: Gunar Schorcht <gunar@schorcht.net> Co-authored-by: Marian Buschsieweke <marian.buschsieweke@ovgu.de> Co-authored-by: Alexandre Abadie <alexandre.abadie@inria.fr> |
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| .. | ||
| bootloader | ||
| dist | ||
| include | ||
| kconfigs | ||
| ldscripts | ||
| periph | ||
| stmclk | ||
| vectors | ||
| cpu_common.c | ||
| cpu_init.c | ||
| doc.txt | ||
| Kconfig | ||
| Makefile | ||
| Makefile.cmsis | ||
| Makefile.default | ||
| Makefile.dep | ||
| Makefile.features | ||
| Makefile.include | ||
| stm32_info.mk | ||
| stm32_line.mk | ||
| stm32_mem_lengths.mk | ||
| stm32_riotboot.mk | ||
| stm32.config | ||