add Flush for UART

soypat · soypat · commit 75c863c8f6df · 2023-03-11T10:40:19.000-03:00
diff --git a/src/machine/machine_rp2040_uart.go b/src/machine/machine_rp2040_uart.go
@@ -131,3 +131,9 @@ func (uart *UART) handleInterrupt(interrupt.Interrupt) {
 	}
 	uart.Receive(byte((uart.Bus.UARTDR.Get() & 0xFF)))
 }
+
+// Flush blocks until all bytes in UART transmit buffer have been sent over the wire.
+func (uart *UART) Flush() {
+	for uart.Bus.UARTFR.HasBits(rp.UART0_UARTFR_BUSY) {
+	}
+}

Original file line number	Diff line number	Diff line change
`@@ -131,3 +131,9 @@ func (uart *UART) handleInterrupt(interrupt.Interrupt) {`
`131`	`131`	`}`
`132`	`132`	`uart.Receive(byte((uart.Bus.UARTDR.Get() & 0xFF)))`
`133`	`133`	`}`
	`134`	`+`
	`135`	`+// Flush blocks until all bytes in UART transmit buffer have been sent over the wire.`
	`136`	`+func (uart *UART) Flush() {`
	`137`	`+ for uart.Bus.UARTFR.HasBits(rp.UART0_UARTFR_BUSY) {`
	`138`	`+ }`
	`139`	`+}`