Article: LoRa SX1262 on NuttX

[Lee, Lup Yuen]

Here's my new article that explains how I ported the
LoRa Driver for Semtech SX1262 from Linux to NuttX...

https://lupyuen.github.io/articles/sx1262

Now that we can send and receive LoRa messages, I'll start porting the
LoRaWAN Stack to NuttX. Stay tuned :-)

Lup

USB MSD problem

[Tim]

Hi,

Having some grief getting USB MSD device to work, following some notes from
Alan C. Assis from around 5 years ago.

It is an MT25Q 32Mbyte spi nor flash device, registered as /dev/mtdblock0
and also mounted and initialised as an nxfss file system at /mnt/flash. I
can read/write to it from nsh.

If I run MSCONN, it crashes:

nsh> msconn
mcsonn_main: Creating block drivers
find_blockdriver: pathname="/dev/mtdblock0"
ftl_geometry: Entry
ftl_geometry: available: true mediachanged: false writeenabled: true
ftl_geometry: nsectors: 131072 sectorsize: 256
usbmsc_exportluns: Starting SCSI worker thread
arm_dataabort: Data abort. PC: 2002f528 DFAR: e8bd8800 DFSR: 0005
up_assert: Assertion failed at file:armv7-a/arm_dataabort.c line: 160 task:
msco

It seems to be somewhere in task_init and group_setuptaskfiles (duplicating
files I think), but debugging deep inside NuttX is, um, scary!

I'm hoping I've just not configured something else it needs; and I can't
seem to find any relevant debug options to assist - USB MSC MM DEBUG seems
to cause it all to hang up at a printf statement in the msconn app.

Any thoughts, kind people?

Thanks, Tim.