From 5d4f759c9207e19b459ada7ca56f50aab95ba9f4 Mon Sep 17 00:00:00 2001
From: Ben Gamari <bgamari.foss@gmail.com>
Date: Tue, 2 Jul 2013 12:46:33 -0400
Subject: [PATCH] lpc43xx/timer: Add timer utilities

---
 include/libopencm3/lpc43xx/timer.h | 16 +++++++
 lib/lpc43xx/m0/Makefile            |  2 +-
 lib/lpc43xx/m4/Makefile            |  2 +-
 lib/lpc43xx/timer.c                | 70 ++++++++++++++++++++++++++++++
 4 files changed, 88 insertions(+), 2 deletions(-)
 create mode 100644 lib/lpc43xx/timer.c

diff --git a/include/libopencm3/lpc43xx/timer.h b/include/libopencm3/lpc43xx/timer.h
index 6b6ad22f..5a649ccc 100644
--- a/include/libopencm3/lpc43xx/timer.h
+++ b/include/libopencm3/lpc43xx/timer.h
@@ -249,6 +249,22 @@ LGPL License Terms @ref lgpl_license
 #define TIMER_CTCR_CINSEL_CAPN_3        (0x3 << 2)
 #define TIMER_CTCR_CINSEL_MASK          (0x3 << 2)
 
+/* --- TIMER function prototypes --------------------------------------------- */
+
+BEGIN_DECLS
+
+void timer_reset(uint32_t timer_peripheral);
+void timer_enable_counter(uint32_t timer_peripheral);
+void timer_disable_counter(uint32_t timer_peripheral);
+uint32_t timer_get_counter(uint32_t timer_peripheral);
+void timer_set_counter(uint32_t timer_peripheral, uint32_t count);
+uint32_t timer_get_prescaler(uint32_t timer_peripheral);
+void timer_set_prescaler(uint32_t timer_peripheral, uint32_t prescaler);
+void timer_set_mode(uint32_t timer_peripheral, uint32_t mode);
+void timer_set_count_input(uint32_t timer_peripheral, uint32_t input);
+
+END_DECLS
+
 /**@}*/
 
 #endif
diff --git a/lib/lpc43xx/m0/Makefile b/lib/lpc43xx/m0/Makefile
index 0aa5bea9..4dc6359b 100644
--- a/lib/lpc43xx/m0/Makefile
+++ b/lib/lpc43xx/m0/Makefile
@@ -32,7 +32,7 @@ CFLAGS		= -O2 -g3 -Wall -Wextra -I../../../include -fno-common \
 ARFLAGS		= rcs
 
 # LPC43xx common files for M4 / M0
-OBJ_LPC43XX     = gpio.o scu.o i2c.o ssp.o uart.o
+OBJ_LPC43XX     = gpio.o scu.o i2c.o ssp.o uart.o timer.o
 
 #LPC43xx M0 specific file + Generic LPC43xx M4/M0 files
 OBJS		= $(OBJ_LPC43XX)
diff --git a/lib/lpc43xx/m4/Makefile b/lib/lpc43xx/m4/Makefile
index 75dbea34..d06cd916 100644
--- a/lib/lpc43xx/m4/Makefile
+++ b/lib/lpc43xx/m4/Makefile
@@ -37,7 +37,7 @@ CFLAGS		= -O2 -g3 \
 ARFLAGS		= rcs
 
 # LPC43xx common files for M4 / M0
-OBJ_LPC43XX     = gpio.o scu.o i2c.o ssp.o uart.o
+OBJ_LPC43XX     = gpio.o scu.o i2c.o ssp.o uart.o timer.o
 
 #LPC43xx M4 specific file + Generic LPC43xx M4/M0 files
 OBJS		= $(OBJ_LPC43XX) ipc.o
diff --git a/lib/lpc43xx/timer.c b/lib/lpc43xx/timer.c
new file mode 100644
index 00000000..3fe7393f
--- /dev/null
+++ b/lib/lpc43xx/timer.c
@@ -0,0 +1,70 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2013 Ben Gamari <bgamari@physics.umass.edu>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This provides the code for the "next gen" EXTI block provided in F2/F4/L1
+ * devices.  (differences only in the source selection)
+ */
+
+#include <libopencm3/lpc43xx/timer.h>
+
+void timer_reset(uint32_t timer_peripheral)
+{
+        TIMER_TCR(timer_peripheral) |= TIMER_TCR_CRST;
+        TIMER_TCR(timer_peripheral) &= ~TIMER_TCR_CRST;
+}
+
+void timer_enable_counter(uint32_t timer_peripheral)
+{
+        TIMER_TCR(timer_peripheral) |= TIMER_TCR_CEN;
+}
+
+void timer_disable_counter(uint32_t timer_peripheral)
+{
+        TIMER_TCR(timer_peripheral) &= ~TIMER_TCR_CEN;
+}
+
+void timer_set_counter(uint32_t timer_peripheral, uint32_t count)
+{
+        TIMER_TC(timer_peripheral) = count;
+}
+
+uint32_t timer_get_counter(uint32_t timer_peripheral)
+{
+        return TIMER_TC(timer_peripheral);
+}
+
+uint32_t timer_get_prescaler(uint32_t timer_peripheral)
+{
+        return TIMER_PR(timer_peripheral);
+}
+
+void timer_set_prescaler(uint32_t timer_peripheral, uint32_t prescaler)
+{
+        TIMER_PR(timer_peripheral) = prescaler;
+}
+
+void timer_set_mode(uint32_t timer_peripheral, uint32_t mode)
+{
+        TIMER_CTCR(timer_peripheral) = (TIMER_CTCR(timer_peripheral) & TIMER_CTCR_MODE_MASK) | mode;
+}
+
+void timer_set_count_input(uint32_t timer_peripheral, uint32_t input)
+{
+        TIMER_CTCR(timer_peripheral) = (TIMER_CTCR(timer_peripheral) & TIMER_CTCR_CINSEL_MASK) | input;
+}
+