[riot-notifications] [RIOT-OS/RIOT] cpu/stm32: make backup SRAM available (#16870)

benpicco notifications at github.com
Thu Sep 23 13:58:04 CEST 2021

@benpicco commented on this pull request.

> +void backup_ram_init(void);
+ * @brief   Check whether the backup RAM regulator is on and backup RAM
+ *          content is retained while asleep
+ */
+bool backup_ram_is_retained(void);
+ * @brief   Enable the backup RAM regulator to retain it´s content
+ *          during standby mode
+ */
+void backup_ram_sleep(void);
+ * @brief   Disable the backup RAM regulator

Can you measure the current to be sure what's going on? Often dev boards have a jumper that you can replace with a multimeter to measure the current. 

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