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nuttx/configs/lc823450-xgevk/README.txt
Masayuki Ishikawa fb07bd7e27 Adds loopback test for digital MIC on lc823450 via i2schar driver. 
Squashed commit of:

  configs/lc823450-xgevk: Enable DMDIN0 (Digital MIC)
  I2S: Add ioctl interface to i2s_ops_s and i2schar driver
  arch/arm/src/lc823450: Add DGMIC in lc823450_i2s.c
  configs/lc823450-xgevk: Add i2schar driver to lc823450_wm8776.c
  configs/lc824350-xgevk: Enable AUDIO_I2SCHAR in audio/defconfig
  configs/lc823450-xgevk: Update README.txt
2018-06-05 10:34:22 -06:00

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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
OpenOCD for NuttX thread and LC823450 support is available at
https://github.com/sony/openocd-nuttx/wiki
MakeIPL2 Tool for eMMC boot is available at
http://www.onsemi.com/PowerSolutions/supportDoc.do?type=software&rpn=LC823450
This port is intended to test LC823450 features including SMP.
Supported peripherals:
UART, TIMER, RTC, GPIO, DMA, I2C, SPI, LCD, eMMC, USB, WDT, ADC, Audio.
Settings
^^^^^^^^
1. eMMC boot and SRAM boot via openocd are supported.
If you do SRAM boot via openocd+gdb, please specify hookpost-load in .gdbinit
to set MSP (main stack pointer) as follows.
define hookpost-load
print *(uint32_t *)0x02040000
set $sp=$
end
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
^^^^^^^^^^^^^^^^^^
CPU activities are shown at D9 (CPU0) and D10 (CPU1) respectively.
Currently all applications except for ostest work in SMP mode but might stop
due to deadlocks or ASSERT(). For a workaround, please try
$ cd apps; git diff
diff --git a/examples/ostest/waitpid.c b/examples/ostest/waitpid.c
index 687f50ca..8418eff8 100644
--- a/examples/ostest/waitpid.c
+++ b/examples/ostest/waitpid.c
@@ -54,7 +54,7 @@
****************************************************************************/
#define RETURN_STATUS 14
-#define NCHILDREN 3
+#define NCHILDREN 2
#define PRIORITY 100
/****************************************************************************
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
7. ADC
nsh> adc
adc_main: g_adcstate.count: 1
adc_main: Hardware initialized. Opening the ADC device: /dev/adc0
Sample:
1: channel: 0 value: 366
2: channel: 1 value: 691
3: channel: 2 value: 752
4: channel: 3 value: 963
5: channel: 4 value: 6
6: channel: 5 value: 0
8. WDT
nsh> wdog
ping elapsed=0
ping elapsed=500
ping elapsed=1000
ping elapsed=1500
ping elapsed=2000
ping elapsed=2500
ping elapsed=3000
ping elapsed=3500
ping elapsed=4000
ping elapsed=4500
NO ping elapsed=5000
NO ping elapsed=5500
NO ping elapsed=6000
9. IPL2 and eMMC boot
IPL2 is the 2nd boot loader based on NuttX and can be built as follows.
$ make distclean
$ ./tools/configure.sh lc823450-xgevk/ipl2
$ make V=1
$ MakeIPL2 ./nuttx.bin 0 2 0 0 0
$ cp LC8234xx_17S_start_data.boot_bin /tmp/
To write the IPL2 (LC8234xx_17S_start_data.boot_bin),
firstly build USB configuration image.
$ make distclean
$ ./tools/configure.sh lc823450-xgevk/usb
$ make V=1
Load the nuttx.bin with openocd + gdb
$ cd openocd-nuttx
$ ./bootstrap
$ ./configure
$ make
$ sudo ./src/openocd -s ./tcl -f ./tcl/board/lc823450_xgevk.cfg -c init -c "reset halt"
$ arm-none-eabi-gdb
(gdb) target extended-remote :3333
(gdb) load ./nuttx
(gdb) symbol-file ./nuttx
(gdb) c
Start USB MSC to copy nuttx.bin and the IPL2 to the FAT32 partition (/dev/mtdblock0p10)
then dd the files to the kernel partition (/dev/mtdblock0p4) and the IPL2 partition
(/dev/mtdblock0p1) respectively.
nsh> mkfatfs -F 32 /dev/mtdblock0p10
nsh> msconn
$ sudo cp ./nuttx.bin /media/usb0/
$ sudo cp /tmp/LC8234xx_17S_start_data.boot_bin /media/usb0/
$ sudo sync
nsh> msdis
nsh> mount -t vfat /dev/mtdblock0p10 /mnt/sd0
nsh> dd if=/mnt/sd0/nuttx.bin of=/dev/mtdblock0p4
nsh> dd if=/mnt/sd0/LC8234xx_17S_start_data.boot_bin of=/dev/mtdblock0p1
nsh> reboot
10. Audio playback (WAV/44.1k/16bit/2ch only)
Firstly, please make sure that the jumper pins are set as follows.
JP1, JP2 => short
JP3, JP4 => open
To play WAV file on uSD card,
nsh> mount -t vfat /dev/mtdblock1 /mnt/sd1
nsh> nxplayer
nxplayer> play /mnt/sd1/sample.wav
nxplayer> volume 50
Please note that a WAV file which contains sub-chunks other than "fmt"
and "data" is not supported in pcm_decode.c So, if your wav file contains
meta-data, please remove the sub-chunks before playing.
11. Networking
lc823450/rndis configuration supports networking features with RNDIS.
To use this feature, you have to connect the board to a RNDIS host.
Currently Linux host is only tested but Windows host should work.
If DHCP server is available, you would see ifconfig results like:
nsh> ifconfig
eth0 Link encap:Ethernet HWaddr 00:e0:de:ad:be:ff at UP
inet addr:192.168.1.244 DRaddr:192.168.1.1 Mask:255.255.255.0
lo Link encap:Local Loopback at UP
inet addr:127.0.0.1 DRaddr:127.0.0.1 Mask:255.0.0.0
IPv4 TCP UDP ICMP
Received 0007 0000 0006 0000
Dropped 0001 0000 0000 0000
IPv4 VHL: 0000 Frg: 0001
Checksum 0000 0000 0000 ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 ---- ---- 0000
Sent 0003 0000 0003 0000
Rexmit ---- 0000 ---- ----
12. DVFS (Dynamic Voltage and Frequency Scaling)
lc823450-xgevk/audio and rndis configurations support DVFS.
You can check the status via /proc/dvfs
nsh> cat /proc/dvfs
cur_freq 160
enable 0
By default, DVFS is disabled. To enable,
nsh> echo "enable 1" > /proc/dvfs
In addition, you can change CPU frequency to 160/80/40 manually.
To change the frequency, enable the DVFS first then do the following.
nsh> echo "cur_freq 80" > /proc/dvfs.
If you want to run in autonomous mode,
nsh> echo "auto 1" > /proc/dvfs.
In autonomous mode, you don't need to set cur_freq. Instead,
cur_freq will show the current CPU frequency.
NOTE: Currently Vdd1 is fixed to 1.2V which will be changed
in the future version.
TODO
^^^^
The following features will be supported.
Accelerometer, etc.
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