I need to use hardware flow control but I am struggling to get it to work. Never done this before with MBED OS. I’m using an LPC1768 board and MBED OS 6.3 and coding using Mbed Studio I’m looking to send just 1 byte at a predefined interval. My code compiles and can flash onto the board but it is…

Apologies… The code actually works! I had inserted a printf statement where I shouldn’t have (you can guess where)…

Hello Gerriko, [image] gerriko: Error Message: Mutex: 0x100014AC, Not allowed in ISR context Are your sure that it work? Even if you remove a printf from the ISR, the UnbufferedSerial’s read method calls Mutex’es lock and unlock methods: ssize_t UnbufferedSerial::read(void *buffer, size_t s…

Thank you. You are right and I was wrong! It’s because the lock() and unlock() functions do not use/call the Mutex. Actually, they do nothing: void SerialBase::lock() { // Stub } void SerialBase:: unlock() { // Stub }

I still prefer the old RawSerial + circularbuffer when needed.

Trying to understand documentation for set_flow_control

Mbed OS

gerriko (Gerriko IO) November 30, 2020, 9:30am 4

Yes the original code is working. The LED toggles with each byte sent and I then receive back the byte as an echo.

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Trying to understand documentation for set_flow_control

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