Roti making robot rotimatic/BlueGiga WF121 PCB ZEM0040-1

Main Project Page: [Roti_making_robot_rotimatic|Rotimatic]

UART

Developer Guide Notes/Examples

Values:

• 0: UART channel 1
• 1: UART channel 2

• Example:
  • channel="0"
  • baud
    • Default: 57600
    • Range: 0-10000000
    • Some supported baud rates: 10000000, 5000000, 2500000, 2000000, 1000000, 115200, 57600

Notice that not all baud rates are possible. BGBuild compiler tries to find best match with least amount of error and outputs the result.

Example:

• baud="115200"
• stopbits Stop bits to use
  • Range: 1-2
  • Default: 1
• Example:
  • stopbits="2"

parity Parity to use Values: odd: use odd parity bit even: use even parity bit none: no parity bit Default: none Example: parity:"odd"

Silicon Labs Page of 19 33

Attribute Value - Description handshake RTS/CTS for data flow control Values: true: RTS/CTS flow control is used false: RTS/CTS flow control is not used* Default: false Example: handshake="true" Streaming mode When using UART in streaming mode ( ), it is highly recommend to use RTS api="false" /CTS data flow control (handshake="true") to ensure reliable data transfer. api UART is used for BGAPI protocol Values: true: UART is used for BGAPI protocol false: UART is used for application data Default: false Example: api="true" When , there should be an application receiving the BGAPI responses and events true at the host, otherwise the module might get stuck.

Example configurations

3.12.1 Using BGAPI over UART interface The example below shows how to configure BGAPI to be used over UART2 interface with 115200 bps baud rate and hardware flow control. WF121 Project <?xml version="1.0" encoding="UTF-8" ?> <hardware>

<uart channel="1

Using BGAPI over UART2 and enabling UART1 to BGScript application The example below shows how to configure BGAPI to be used over UART2 interface and UART1 interface access is given to a BGScript application. This is used in multiple example applications delivered with the Bluegiga Wi-Fi Software. The purpose is for example to use UART1 for BGScript debugging and UART2 for DFU firmware updates. WF121 Project <?xml version="1.0" encoding="UTF-8" ?> <hardware>

<uart channel="0" baud="115200" api="false" handshake="false" />
<uart channel="1" baud="115200" api="True" handshake="True" />

</hardware>

WF121 Factory Configuration WF121 Modules are factory shipped with settings listed below. Feature Value Notes BGAPI UART UART2 This UART gives access to BGAPI protocol, which can be used to control the WF121 Module from a separate host. Pin 17: CTS Pin 19: RTS Pin 35: RX Pin 36: TX Baud rate 115200 bps Data bits 8 Parity bit none Stop bit (s) 1 RTS /CTS enabled RTS and CTS must be connected for the BGAPI communication to work properly. UART1 is activated, but not accessed in the factory configuration. The corresponding hardware configuration is shown below: <?xml version="1.0" encoding="UTF-8" ?> <hardware>

<uart channel="0" baud="115200" api="false" />
<uart channel="1" baud="115200" api="true" handshake="True" />

</hardware>

Data Sheet v1.4.9 2013

Developer Guide v3.0 2016

Application Notes v1.1 2014