56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
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// +build nrf
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package rawterm
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import (
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"machine"
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"time"
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)
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var serial = machine.UART0
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// Getchar returns a single character from stdin, or a serial input. Newlines
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// are encoded with a single LF ('\n').
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func Getchar() byte {
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for {
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// TODO: let ReadByte block instead of polling here.
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time.Sleep(1 * time.Millisecond)
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if serial.Buffered() <= 0 {
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continue
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}
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ch, _ := serial.ReadByte()
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if ch == 0 {
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continue
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}
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if ch == '\r' {
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ch = '\n'
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}
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return ch
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}
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}
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// Putchar writes a single character to the terminal. Newlines are expected to
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// be encoded as LF symbols ('\n').
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func Putchar(ch byte) {
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if ch == '\n' {
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serial.WriteByte('\r')
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}
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serial.WriteByte(ch)
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}
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// Configure initializes the terminal for use by raw reading/writing (using
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// Getchar/Putchar). It must be restored after use with Restore. You can do this
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// with the following code:
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//
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// rawterm.Configure()
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// defer rawterm.Restore()
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// // use raw terminal features
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func Configure() {
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}
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// Restore restores the state to before a call to Configure. It must be called
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// after a call to Configure to restore the terminal state, and must only be
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// called after a call to Configure.
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func Restore() {
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}
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