Difference between revisions of "ETRA SOM/ETRA Evaluation Kit/Interfaces and Connectors/UARTs"
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The UART interfaces are available on the Evaluation Kit at the connectors J9 and J10. | The UART interfaces are available on the Evaluation Kit at the connectors J9 and J10. | ||
| − | J9 and J10 are 3 pin terminal blocks 5.0mm pitch respectively for USART3 and UART8. Can be independently used as RS232 or RS485 based on | + | J9 and J10 are 3 pin terminal blocks 5.0mm pitch respectively for USART3 and UART8. Can be independently used as RS232 or RS485 based on [[ETRA_SOM/ETRA_Hardware/Part_number_composition | Part Number composition]]. |
| − | [[File: | + | [[File:ETRA-EVB-UARTs-connector.png|thumb|center|500px|UARTs connector]] |
===Signals === | ===Signals === | ||
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=== Device mapping === | === Device mapping === | ||
| + | {| style="color:#000000; border:solid 2px #73B2C7; background-color:#ededed;font-size:95%; vertical-align:middle;" | ||
| + | | [[File:TBD.png|30px]] | ||
| + | | '''Section not completed yet''' | ||
| + | |} | ||
| + | |||
| + | |||
USART3 is mapped to <code>/dev/ttyxxx</code> device in Linux. | USART3 is mapped to <code>/dev/ttyxxx</code> device in Linux. | ||
Revision as of 11:18, 11 January 2021
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| History | |||
|---|---|---|---|
| Version | Issue Date | Notes | |
| 1.0.0 | Dec 2020 | First Release | |
Contents
UARTs interface[edit | edit source]
Description[edit | edit source]
The UART interfaces are available on the Evaluation Kit at the connectors J9 and J10.
J9 and J10 are 3 pin terminal blocks 5.0mm pitch respectively for USART3 and UART8. Can be independently used as RS232 or RS485 based on Part Number composition.
File:ETRA-EVB-UARTs-connector.png
UARTs connector
Signals[edit | edit source]
The following table describes the interface signals:
J9[edit | edit source]
| Pin# | SOM Pin# | RS232 | RS485 | Pin Notes |
|---|---|---|---|---|
| 1 | J18.89 | USART3_TX | RS485_A | |
| 2 | J18.91 | USART3_RX | RS485_B | |
| 3 | - | Ground | Ground |
J10[edit | edit source]
| Pin# | SOM Pin# | RS232 | RS485 | Pin Notes |
|---|---|---|---|---|
| 1 | J18.191 | UART8_TX | RS485_A | |
| 2 | J18.193 | UART8_RX | RS485_B | |
| 3 | - | Ground | Ground |
Device mapping[edit | edit source]
|
Section not completed yet |
USART3 is mapped to /dev/ttyxxx device in Linux.
UART8 is mapped to /dev/ttyxxx device in Linux.
Device usage[edit | edit source]
Fix the signal cables to the terminal with a small flat screwdriver.
