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jtagtap_generic.c
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jtagtap_generic.c
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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2011 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/>.
*/
/* This file provides generic forms of the low-level jtagtap functions
* for platforms that don't require optimised forms.
*/
#include "general.h"
#include "jtagtap.h"
void __attribute__((weak))
jtagtap_tms_seq(uint32_t MS, int ticks)
{
while(ticks--) {
jtagtap_next(MS & 1, 1);
MS >>= 1;
}
}
void __attribute__((weak))
jtagtap_tdi_tdo_seq(uint8_t *DO, const uint8_t final_tms, const uint8_t *DI, int ticks)
{
uint8_t index = 1;
while(ticks--) {
if(jtagtap_next(ticks?0:final_tms, *DI & index)) {
*DO |= index;
} else {
*DO &= ~index;
}
if(!(index <<= 1)) {
index = 1;
DI++; DO++;
}
}
}
void __attribute__((weak))
jtagtap_tdi_seq(const uint8_t final_tms, const uint8_t *DI, int ticks)
{
uint8_t index = 1;
while(ticks--) {
jtagtap_next(ticks?0:final_tms, *DI & index);
if(!(index <<= 1)) {
index = 1;
DI++;
}
}
}