msp430fr5969: add UART input on eUSCI_A1

1 files changed, 40 insertions, 0 deletions

diff --git a/src/arch/msp430fr5969lp/driver/stdin1.cc b/src/arch/msp430fr5969lp/driver/stdin1.cc
new file mode 100644
index 0000000..efb7f90
--- /dev/null
+++ b/src/arch/msp430fr5969lp/driver/stdin1.cc
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 Birte Kristina Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "driver/stdin1.h"
+#include <msp430.h>
+
+void StandardInput1::setup()
+{
+	UCA1CTLW0 |= UCSWRST;
+	P2SEL0 &= ~BIT6;
+	P2SEL1 |= BIT6;
+	UCA1CTLW0 &= ~UCSWRST;
+	UCA1IE |= UCRXIE;
+}
+
+bool StandardInput1::hasKey()
+{
+	if (write_pos != read_pos) {
+		return true;
+	}
+	return false;
+}
+
+char StandardInput1::getKey()
+{
+	char ret = buffer[read_pos++];
+	read_pos %= bufsize;
+	return ret;
+}
+
+StandardInput1 kin1;
+
+__attribute__((interrupt(USCI_A1_VECTOR))) __attribute__((wakeup)) void handle_stdin1()
+{
+	if (UCA1IFG & UCRXIFG) {
+		kin1.addKey(UCA1RXBUF);
+	}
+}