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2022-04-16stm32g4: initial platform supportKarl Palsson1-0/+25
Have some demo code using lptim, lpuart, exti and rtc mostly working. It glitches into undefined exceptions, so it's a little concerning, but... it's all cross checked against RM0440_rev7, so it's pretty good. Signed-off-by: Karl Palsson <karlp@tweak.net.au>
2022-01-26stm32wb: rtc: initial registersKarl Palsson2-0/+68
Backup registers are just hardcoded to 32, which is the max seen. Note that the STM32WB only has 20! I've captured that in the platform yaml, even though it's not used anywhere (yet?) Signed-off-by: Karl Palsson <karlp@tweak.net.au>