half-baked timer implementation for MSP430 and Arduino

1 files changed, 40 insertions, 0 deletions

diff --git a/include/arch/msp430fr5969lp/driver/timer.h b/include/arch/msp430fr5969lp/driver/timer.h
new file mode 100644
index 0000000..34feb12
--- /dev/null
+++ b/include/arch/msp430fr5969lp/driver/timer.h
@@ -0,0 +1,40 @@
+#include <msp430.h>
+
+#define ON_TIMER_INTERRUPT_head __attribute__((interrupt(TIMER0_A1_VECTOR))) __attribute__((wakeup)) void handle_timer0_overflow() { if (TA0IV == 0x0e) {
+#define ON_TIMER_INTERRUPT_tail } }
+
+class Timer {
+	private:
+		Timer(const Timer &copy);
+
+	public:
+		Timer() {}
+
+		inline void setup_khz(uint16_t const frequency) {
+			TA0CTL = TASSEL__SMCLK | ID__8 | MC__UP;
+			TA0EX0 = 1;
+			TA0CCR0 = 1000 / frequency;
+			TA0CTL |= TACLR;
+		}
+
+		inline void setup_hz(uint16_t const frequency) {
+			TA0CTL = TASSEL__SMCLK | ID__8 | MC__UP;
+			TA0EX0 = 1;
+			TA0CCR0 = 1000000 / frequency;
+			TA0CTL |= TACLR;
+		}
+
+		inline void start(unsigned char const interrupt) {
+			if (interrupt) {
+				TA0CTL |= TACLR | TAIE;
+			} else {
+				TA0CTL |= TACLR;
+			}
+		}
+
+		inline void stop() {
+			TA0CTL = 0;
+		}
+};
+
+extern Timer timer;