EMTime/libopencm3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

lm4f: Add API for enabling/disabling peripherals clock source

Browse Source 
The enum definitions are specified in the form
 31:5 register offset from SYSCTL_BASE for the clock register
 4:0  bit offset for the given peripheral

The names have the form [clock_type]_[periph_type]_[periph_number]
Where clock_type is
     RCC for run clock
     SCC for sleep clock
     DCC for deep-sleep clock

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Alexandru Gagniuc
2012-11-29 19:37:45 -06:00
parent 61f2cb3f99
commit 03d04ad10a
3 changed files with 310 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/lm4f/Makefile
View File

@@ -28,7 +28,7 @@ CFLAGS = -Os -g -Wall -Wextra -I../../include -fno-common \
-ffunction-sections -fdata-sections -MD -DLM4F
# ARFLAGS = rcsv
ARFLAGS = rcs
OBJS = gpio.o vector.o assert.o
OBJS = gpio.o vector.o assert.o systemcontrol.o
VPATH += ../cm3

41
lib/lm4f/systemcontrol.c Normal file
View File

@@ -0,0 +1,41 @@
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
*
* 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/>.
*/
#include <libopencm3/lm4f/systemcontrol.h>
/**
* \brief Enable the clock source for the peripheral
*
* @param[in] periph peripheral and clock type to enable @see clken_t
*/
void periph_clock_enable(clken_t periph)
{
MMIO32(SYSCTL_BASE + (periph >> 5)) |= 1 << (periph & 0x1f);
}
/**
* \brief Disable the clock source for the peripheral
*
* @param[in] periph peripheral and clock type to enable @see clken_t
*/
void periph_clock_disable(clken_t periph)
{
MMIO32(SYSCTL_BASE + (periph >> 5)) &= ~(1 << (periph & 0x1f));
}