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lpc43xx/timer: Add timer utilities

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This commit is contained in:
Ben Gamari
2013-07-02 12:46:33 -04:00
committed by Piotr Esden-Tempski
parent 9d89df0db6
commit 5d4f759c92
4 changed files with 88 additions and 2 deletions
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16
include/libopencm3/lpc43xx/timer.h
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@@ -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

2
lib/lpc43xx/m0/Makefile
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@@ -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)

2
lib/lpc43xx/m4/Makefile
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@@ -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

70
lib/lpc43xx/timer.c Normal file
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@@ -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;
}