87f97e490c
- Configures `PLL2->PFD0` with **198MHz** as base clock of
`USDHCx` peripheral.
- Adds guards for SDCard related files via `MICROPY_PY_MACHINE_SDCARD`
- Adds creation of pin defines for SDCard to make-pins.py
- Adds new configuration option for SDCard peripheral pinout
to mpconfigport.h
- Adds interrupt handling support instead of polling
- Adds support for `ADMA2` powered data transfer
- Configures SDCard to run in HS (high-speed mode) with **50MHz** only!
SDCard support is optional and requires `USDHC` peripheral.
Thus this driver is not available on `MIMXRT1010_EVK`.
SDCard support is enabled by setting `MICROPY_PY_MACHINE_SDCARD = 1`
in mpconfigboard.mk.
Signed-off-by: Philipp Ebensberger
35 lines
771 B
Python
35 lines
771 B
Python
# _boot.py
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# Try to mount the filesystem, and format the flash if it doesn't exist.
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# Note: the flash requires the programming size to be aligned to 256 bytes.
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import os
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import sys
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import mimxrt
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from machine import Pin
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bdev = mimxrt.Flash()
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try:
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vfs = os.VfsLfs2(bdev, progsize=256)
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except:
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os.VfsLfs2.mkfs(bdev, progsize=256)
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vfs = os.VfsLfs2(bdev, progsize=256)
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os.mount(vfs, "/flash")
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os.chdir("/flash")
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sys.path.append("/flash")
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# do not mount the SD card if SKIPSD exists.
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try:
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os.stat("SKIPSD")
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except:
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try:
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from machine import SDCard
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sdcard = SDCard(1)
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fat = os.VfsFat(sdcard)
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os.mount(fat, "/sdcard")
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os.chdir("/sdcard")
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sys.path.append("/sdcard")
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except:
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pass # Fail silently
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