ETRA SOM/ETRA Evaluation Kit/Interfaces and Connectors/DWM
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| History | |||
|---|---|---|---|
| Version | Issue Date | Notes | |
| 1.0.0 | Dec 2020 | First Release | |
DWM[edit | edit source]
DWM is a Dave Wireless Module, more detail at the DWM page.
Description[edit | edit source]
The DWM interface is available on the Evaluation Kit at the connector J8.
J8 is a 30-pins 0.50mm Pitch SlimStack™ Receptacle. This connector is dedicated to the DWM (optional) add-on module.
The module is built around an LS Research TiWi-BLE Integrated Transceiver Modules for WLAN 802.11 b/g/n and Bluetooth.
The module implements the necessary PHY/MAC layers to support WLAN applications in conjunction with a host processor over a SDIO interface. The module also provides a Bluetooth platform through the HCI transport layer. Both WLAN and Bluetooth share the same antenna port.
Signals[edit | edit source]
The following table describes the interface signals:
| Pin# | SOM Pin# | Pin name | Pin function | Pin Notes |
|---|---|---|---|---|
| 1, 2 | - | 5V_CB | 5V power | |
| 3, 4 | - | 3V3_CB | 3.3V power | |
| 5, 6, 9, 10, 19 | - | DGND | Ground | |
| 7 | J18.45 | WIFI_CMD | ||
| 8 | J18.47 | WIFI_CLK | ||
| 11 | J18.37 | WIFI_DATA0 | ||
| 13 | J18.39 | WIFI_DATA1 | ||
| 15 | J18.41 | WIFI_DATA2 | ||
| 17 | J18.43 | WIFI_DATA3 | ||
| 21 | J18.80 | BT_UART_RX | Used only for BT peripheral | |
| 23 | J18.76 | BT_UART_CTS | Used only for BT peripheral | |
| 24 | J18.105 | TIWI_BT_F5 | ||
| 25 | J18.74 | BT_UART_TX | Used only for BT peripheral | |
| 26 | J18.72 | TIWI_BT_F2 | ||
| 27 | J18.78 | BT_UART_RTS | Used only for BT peripheral | |
| 28 | J18.70 | TIWI_IRQ | ||
| 29 | J18.51 | TIWI_BT_EN | ||
| 30 | J18.53 | TIWI_EN | ||
| 12, 14, 16, 18, 20, 22 | - | N.C. | Not connected |
Device mapping[edit | edit source]
|
Section not completed yet |
The WiFi peripheral is mapped to the corresponding wlan<X> device in Linux. The network peripheral is visible under the ifconfig network configuration utility.
The BT peripheral is mapped to /dev/ttyxxx device in Linux.
The control signals are managed by rfkill in Linux.
Device usage[edit | edit source]
The WiFi peripheral use the standard kernel interface and network protocol stack.
The BT peripheral use the standard kernel hci interface.
