delay draft

diff --git a/Makefile b/Makefile
index 54bba864b4a1c1e7b69e63f68690138cb5c4a23a..f56590a1642b34018e55b66cfb8eeef91edcc112 100644 (file)
--- 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 (file)
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 (file)
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 257cebfd36de93a3c410412548721fc2871ca62a..8a4b74a2a1eb79ad7c8bc311ea4332baceb00e0e 100644 (file)
--- 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);
 }