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>
