delay draft

4 files changed, 71 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 54bba86..f56590a 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@ CFLAGS = -mmcu=msp430g2553 -std=gnu99 \
 	 -Os
 
 CSRC = board.c \
+       delay.c \
        i2c.c \
        temp.c \
        main.c
diff --git a/delay.c b/delay.c
new file mode 100644
index 0000000..a259fe3
--- /dev/null
+++ b/delay.c
@@ -0,0 +1,37 @@
+/**
+ * @file delay.c
+ * Delay support using a timer.
+ *
+ * Copyright (C) 2019  Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "board.h"
+
+static unsigned int delayTicks = 0;
+
+void delayInit(void)
+{
+	TACCTL0 |= CCIE;
+	TACCR0 = 1000;
+	TACTL |= TASSEL_1 | MC_1;
+}
+
+__attribute__((__interrupt__(TIMER0_A0_VECTOR)))
+static void delayInterruptHandler(void)
+{
+	P1OUT ^= LED;
+	delayTicks++;
+}
diff --git a/delay.h b/delay.h
new file mode 100644
index 0000000..1a46286
--- /dev/null
+++ b/delay.h
@@ -0,0 +1,27 @@
+/**
+ * @file delay.h
+ * Delay support using a timer.
+ *
+ * Copyright (C) 2019  Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef DELAY_H_
+#define DELAY_H_
+
+void delayInit(void);
+
+#endif // DELAY_H_
+
diff --git a/main.c b/main.c
index 257cebf..8a4b74a 100644
--- a/main.c
+++ b/main.c
@@ -19,6 +19,7 @@
  */
 
 #include "board.h"
+#include "delay.h"
 #include "temp.h"
 
 void main(void)
@@ -26,9 +27,12 @@ void main(void)
 	// Prepare processor and IO
 	boardInit();
 
+	delayInit();
+	__enable_interrupt();
+
 	// Prepare temperature sensor
-	if (tempInit() != 0)
-		while (1); // Sensor error, halt
+	//if (tempInit() != 0)
+	//	while (1); // Sensor error, halt
 
 	while (1);
 }