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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2016 Black Sphere Technologies Ltd.
* Written by Gareth McMullin <gareth@blacksphere.co.nz>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "general.h"
uint32_t swdptap_seq_in(int ticks)
{
uint32_t index = 1;
uint32_t ret = 0;
while (ticks--) {
if (swdptap_bit_in())
ret |= index;
index <<= 1U;
}
return ret;
}
bool swdptap_seq_in_parity(uint32_t *ret, int ticks)
{
uint32_t index = 1;
uint8_t parity = 0;
*ret = 0;
while (ticks--) {
if (swdptap_bit_in()) {
*ret |= index;
parity ^= 1U;
}
index <<= 1U;
}
if (swdptap_bit_in())
parity ^= 1U;
return parity;
}
void swdptap_seq_out(uint32_t MS, int ticks)
{
while (ticks--) {
swdptap_bit_out(MS & 1U);
MS >>= 1U;
}
}
void swdptap_seq_out_parity(uint32_t MS, int ticks)
{
uint8_t parity = 0;
while (ticks--) {
swdptap_bit_out(MS & 1U);
parity ^= MS;
MS >>= 1U;
}
swdptap_bit_out(parity & 1U);
}