It returns a true if there is a char in the serial input buffer. I usually use it when I'm in an inifinit loop and want to break out if some hits the keyboard. Similar to "?key" in Forth.:-)

--- wnlee1109@gmail.com wrote:

Hello, u-boot community,

When I wrote the hardware dependent parts of serial functions,

I cannot understand what should I write for "serial_tstc()".

What is the purpose of "serial_tstc()"? Does anyone know?

Thanks Wayne

---

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