README
^^^^^^
README for NuttX port to the LC823450XGEVK board.
The board information is available at
http://www.onsemi.com/PowerSolutions/evalBoard.do?id=LC823450XGEVK
LC823450 related documents are available at
http://www.onsemi.com/PowerSolutions/supportDoc.do?type=AppNotes&rpn=LC823450
This port is intended to test LC823450 features including SMP.
Supported peripherals are UART, TIMER, RTC, GPIO, DMA, I2C, SPI, LCD.
Settings
^^^^^^^^
1. Currently only SRAM boot via ICE is supported.
2. If SWD connection is lost, please specify lower adaptor clock.
3. Both CPUs are running at 160MHz.
4. Internal SRAMs (seg0 to seg5) are used.
5. Serial console can be used via external USB-UART (115200/8/N/1).
6. Interrupt handlers except for inter-cpu are handled on CPU0.
SMP related Status
^^^^^^^^^^^^^^^^^^
Currently SMP feature works on the board but might not be stable.
In addition, console output might be corrupted if the both CPUs
output into the console because UART operates in FIFO mode.
1. "nsh> smp" works but the result will be corrupted.
2. "nsh> ostest" works but might cause a deadlock or assertion.
Other Status
^^^^^^^^^^^^
1. nsh built-in commands such as ps, free are available.
NuttShell (NSH)
nsh> ps
PID GROUP CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK COMMAND
0 0 0 0 FIFO Kthread N-- Assigned 00000000 000000 CPU0 IDLE
1 0 1 0 FIFO Kthread N-- Running 00000000 002044 CPU1 IDLE
3 1 0 100 FIFO Task --- Running 00000000 003052 init
nsh> free
total used free largest
Mem: 1027024 13136 1013888 1013888
2. date command can be used to get/set RTC date and time.
nsh> date
Oct 03 00:00:55 2013
nsh> date -s "Mar 31 12:34:56 2017"
nsh> date
Mar 31 12:34:56 2017
3. i2c app can be used to test I2C buses.
nsh> i2c get -b 1 -a 18 -r 0
READ Bus: 1 Addr: 18 Subaddr: 00 Value: f9
4. nxhello app can be used to test LCD via SPI.
nsh> nxhello
nxhello_initialize: Initializing LCD
nxhello_initialize: Open NX
nxhello_main: NX handle=20096f0
nxhello_main: Set background color=0
nxhello_main: Screen resolution (128,48)
nxhello_hello: Position (31,20)
nxhello_main: Close NX
5. eMMC can be accessed via /dev/mtdblock0pX
nsh> mkfatfs -F 32 /dev/mtdblock0p10
nsh> mount -t vfat /dev/mtdblock0p10 /mnt/sd0
nsh> df
Block Number
Size Blocks Used Available Mounted on
16384 453025 2 453023 /mnt/sd0
0 0 0 0 /proc
nsh> ls /mnt/sd0
/mnt/sd0:
nsh> ps > /mnt/sd0/ps.txt
nsh> ls /mnt/sd0
/mnt/sd0:
ps.txt
Micro SD slot on the board can be used via /dev/mtdblock1.
Please note that card hotplugging is not supported.
6. USB Mass Storage Class support
nsh> msconn
nsh> msdis
TODO
^^^^
The following peripherals will be supported.
ADC, Audio, etc.
