i350 Pumpkin Board
Purchasing
The i350 pumpkin board is made by OLogic. To request a pumpkin i350, please contact OLogic.
Building
You can build an image for the i350 pumpkin board by setting the MACHINE variable in your local.conf to i350-pumpkin.
MACHINE=i350-pumpkin
For full build instructions, please refer to the top level README.md.
MT7663 wireless chipset
The i350 EVK board is integrating a MT7663 wireless chipset.
FTDI board control
The FTDI chip connected to the DEBUG (CN5) port is able to control the power (PWRKEY), reset (SYSRST), and download (KPCOL0) lines.
FTDI GPIO Line |
Function |
|---|---|
0 |
Power (PWRKEY) |
1 |
Reset (SYSRST) |
2 |
Download (KPCOL0) |
Note
By default the FTDI chip is not configured to use these 3 lines. Please refer to the AIoT tools manual to see how to configure and control these 3 lines.
Audio
Playback
By default, the i350 Pumpkin board ouputs audio on the jack connector.
The following command is an example that will start a music playback of a wav file that is already on the device:
aplay playback_file.wav
It is possible to use TDM out instead provided you have the corresponding device connected on the 40 pins header. In this case, the device will need to be specified explicitally as follows:
aplay -D tdm_out playback_file.wav
It is also possible to switch to I2S out provided you have the corresponding device connected on the 40 pins header. In order to do that, you don’t need to specify a device but you will need to change several alsa settings using the following commands:
In order to disable the headset output and enable I2S out:
amixer sset -c mtsndcard 'I2S O03_O04',0 on
amixer sset -c mtsndcard 'INT ADDA O03_O04',0 off
In order to switch back to Headset out:
amixer sset -c mtsndcard 'I2S O03_O04',0 off
amixer sset -c mtsndcard 'INT ADDA O03_O04',0 on
Capture
By default, the i350 Pumpkin board captures audio using the jack microphone.
The following command is an example that will start a mono record with a sampling rate of 48kHz and a signed 32bits bit format:
arecord -c 1 -r 48000 -f s32_le recorded_file.wav
Another possibility is using the Analog mics (that you will have to plug on the board first). In that case, you will need to switch from the jack mic to the analog mic using the following command:
amixer sset -c mtsndcard 'Audio_MicSource1_Setting',0 ADC1
Then use a similar command as for jack mic:
arecord -c 2 -r 48000 -f s32_le recorded_file.wav
In order to switch back to jack mic, use the following command:
amixer sset -c mtsndcard 'Audio_MicSource1_Setting',0 ADC2
40 pins header configuration
Here is the pin configuration to use the audio devices present on the 40 pins header:
Header pin |
Function |
|---|---|
12 |
TDM_LRCK |
16 |
TDM_MCK |
37 |
TDM_BCK |
35 |
TDM_DATA0 |
40 |
TDM_DATA1 |
11 |
TDM_DATA2 |
38 |
TDM_DATA3 |
33 |
I2S1_LRCK |
32 |
I2S1_MCK |
29 |
I2S1_BCK |
31 |
I2S1_DO |
USB audio
USB audio is supported on this board. Simply plug an USB audio device (an USB headset for example) and check its id or name before playing or recording something.
In order to play a wav file:
# List the playback devices
aplay -l
# If USB card id is 1 and its playback device id is 0,
# using the following command (forcing the framerate
# to 48HHz)
aplay -D plughw:1,0 -r 48000 playback_file.wav
In order to record a wav file:
# List the capture devices
arecord -l
# If USB card id is 1 and its capture device id is 0,
# using the following command (forcing the framerate
# to 48HHz)
arecord -D plughw:1,0 -r 48000 -c 1 -f s32_le recorded_file.wav