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968fa47392
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3 Commits

Author SHA1 Message Date
Andrew Leech
968fa47392 stm32/sdram: On F7 MCUs enable MPU on external SDRAM. 
This prevents hard-faults on non-aligned accesses.

Reference: http://www.keil.com/support/docs/3777.htm
 2018-07-23 23:15:18 +10:00
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