46 lines
1.9 KiB
C
46 lines
1.9 KiB
C
/*
|
|
* Copyright 2012 Jared Boone <jared@sharebrained.com>
|
|
*
|
|
* This file is part of HackRF.
|
|
*
|
|
* 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 2, 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; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "bitband.h"
|
|
|
|
volatile uint32_t* peripheral_bitband_address(volatile void* const address, const uint_fast8_t bit_number) {
|
|
const uint32_t bit_band_base = 0x42000000;
|
|
const uint32_t byte_offset = (uint32_t)address - 0x40000000;
|
|
const uint32_t bit_word_offset = (byte_offset * 32) + (bit_number * 4);
|
|
const uint32_t bit_word_address = bit_band_base + bit_word_offset;
|
|
return (volatile uint32_t*)bit_word_address;
|
|
}
|
|
|
|
void peripheral_bitband_set(volatile void* const peripheral_address, const uint_fast8_t bit_number) {
|
|
volatile uint32_t* const bitband_address = peripheral_bitband_address(peripheral_address, bit_number);
|
|
*bitband_address = 1;
|
|
}
|
|
|
|
void peripheral_bitband_clear(volatile void* const peripheral_address, const uint_fast8_t bit_number) {
|
|
volatile uint32_t* const bitband_address = peripheral_bitband_address(peripheral_address, bit_number);
|
|
*bitband_address = 0;
|
|
}
|
|
|
|
uint32_t peripheral_bitband_get(volatile void* const peripheral_address, const uint_fast8_t bit_number) {
|
|
volatile uint32_t* const bitband_address = peripheral_bitband_address(peripheral_address, bit_number);
|
|
return *bitband_address;
|
|
}
|