User's Manual

LS5B User Manual
Libre Wireless Technologies User Manual: LS5B, Ver. 1.0 Page 33 of 89
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4.12. X-MODEM Packet Size
X-Modem Packet Size for transferring the firmware to Host-MCU can be either 128 bytes or
1022 bytes. The X-MODEM Packet Size can be set using the NV-Item xmodem_pkt_size. By
default the X-MODEM Packet Size is set to be 1024 bytes.
The syntax below provides commands to edit xmodem_pkt_size.
To set the X-MODEM Packet Size at 128bytes
#setenv xmodem_pkt_size <<128>>
To set the X-MODEM Packet Size at 1024 bytes
# setenv xmodem_pkt_size <<1024>>
4.13. I2S Clock from Bluetooth Module
By default I2S Clock is supplied by any CODEC / DAC in I2S-Master mode. LS Module or any
other chip attached to I2S-Bus (Example- Bluetooth) functions in I2S-Slave mode.
By using this NV-Item the system can be configured to operate such that, external
Bluetooth module (I2S-Master) provides the I2S Clock and both CODEC / LS Module
operates in I2S-Slave mode.
To set CODEC / DAC as I2S-Master (Default State)
#setenv BCLK <<0>>
To set External Bluetooth as I2S-Master
#setenv BCLK <<1>>
4.14. ACP Sharing