micropython

Autor	SHA1	Wiadomość	Data
Andrew Leech	8ed4a28dae	stm32/sdram: Increase GPIO speed for SDRAM interface to "very high". Currently all usages of mp_hal_pin_config_alt_static() set the pin speed to "high" (50Mhz). The SDRAM interface typically runs much faster than this so should be set to the maximum pin speed. This commit adds mp_hal_pin_config_alt_static_speed() which allows setting the pin speed along with the other alternate function details.	2019-02-20 16:54:32 +11:00
Damien George	9639e0d26f	stm32/sdram: Add support for 32-bit wide data bus and 256MB in MPU cfg.	2018-09-20 11:29:37 +10:00
forester3	e562f99263	stm32/sdram: Allow additional config by a board, and tune MPU settings. - Allow configuration by a board of autorefresh number and burst length. - Increase MPU region size to 8MiB. - Make SDRAM region cacheable and executable.	2018-08-14 16:00:14 +10:00
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