RS485 using USART or UART port on STM32
$begingroup$
On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?
I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.
stm32 uart rs485 3.3v
asked 1 hour ago
scico111scico111
352111
$endgroup$
add a comment |
$begingroup$
On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?
I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.
stm32 uart rs485 3.3v
asked 1 hour ago
scico111scico111
352111
$endgroup$
add a comment |
$begingroup$
On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?
I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.
stm32 uart rs485 3.3v
asked 1 hour ago
scico111scico111
352111
$endgroup$
On STM32F405 MCU's there are USART ports as well as UART ports available. I want to know that if I need to implement an RS485 communication then which one of these should be used USART or UART. Or are both of them equally good for an RS485 communication?
I have searched through the datasheet as well as reference manual for the MCU but it does not provide additional info regarding the RS485 implementation.
stm32 uart rs485 3.3v
stm32 uart rs485 3.3v
asked 1 hour ago
scico111scico111
352111
asked 1 hour ago
scico111scico111
352111
asked 1 hour ago
scico111scico111
352111
asked 1 hour ago
scico111scico111
352111
asked 1 hour ago
scico111scico111
352111
352111
add a comment |
add a comment |
1 Answer
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It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.
answered 1 hour ago
Tom L.Tom L.
6,65011227
$endgroup$
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.
answered 1 hour ago
Tom L.Tom L.
6,65011227
$endgroup$
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
add a comment |
$begingroup$
It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.
answered 1 hour ago
Tom L.Tom L.
6,65011227
$endgroup$
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
add a comment |
$begingroup$
It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.
answered 1 hour ago
Tom L.Tom L.
6,65011227
$endgroup$
It doesn't matter as even if you're using a USART (which provides an additional CLK pin for synchronous operation) you'll only be using the UART part (RXD/TXD). Keep in mind that you'll need an additional pin for the Data Enable signal.
answered 1 hour ago
Tom L.Tom L.
6,65011227
answered 1 hour ago
Tom L.Tom L.
6,65011227
answered 1 hour ago
Tom L.Tom L.
6,65011227
answered 1 hour ago
Tom L.Tom L.
6,65011227
6,65011227
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
add a comment |
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
1
1
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
$begingroup$
If you use full-duplex RS485, then you don't need a data enable signal. You only need one for half-duplex RS485
$endgroup$
– Toor
47 mins ago
add a comment |
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