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3 Commits

Author SHA1 Message Date
iabdalkader b603066bc2 stm32/sdram: Add SDRAM enter/leave self-refresh mode functions. 
These functions enable SDRAM data retention in stop mode.  Example usage,
in mpconfigboard.h:

    #define MICROPY_BOARD_ENTER_STOP sdram_enter_low_power();
    #define MICROPY_BOARD_LEAVE_STOP sdram_leave_low_power();
 2020-12-17 23:19:25 +11:00
Andrew Leech a1db1506a2 stm32/sdram: Integrate SDRAM driver into rest of code. 
If SDRAM is configured and enabled for a board then it is used for the
MicroPython GC heap.
 2018-07-23 23:14:23 +10:00
Andrew Leech 7ae053abfd stm32/sdram: Add SDRAM driver from OpenMV project. 
Taken from 7fbe54ad4e/src/omv/sdram.c

Code is is MIT licensed.
 2018-07-23 23:13:24 +10:00