libsigrok/hardware/zeroplus-logic-cube/protocol.c

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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
*
* 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 "protocol.h"
SR_PRIV unsigned int get_memory_size(int type)
{
if (type == MEMORY_SIZE_8K)
return 8 * 1024;
else if (type == MEMORY_SIZE_64K)
return 64 * 1024;
else if (type == MEMORY_SIZE_128K)
return 128 * 1024;
else if (type == MEMORY_SIZE_512K)
return 512 * 1024;
else
return 0;
}
SR_PRIV int set_limit_samples(struct dev_context *devc, uint64_t samples)
{
devc->limit_samples = samples;
if (samples <= 2 * 1024)
devc->memory_size = MEMORY_SIZE_8K;
else if (samples <= 16 * 1024)
devc->memory_size = MEMORY_SIZE_64K;
else if (samples <= 32 * 1024 || devc->max_memory_size <= 32 * 1024)
devc->memory_size = MEMORY_SIZE_128K;
else
devc->memory_size = MEMORY_SIZE_512K;
sr_info("Setting memory size to %dK.",
get_memory_size(devc->memory_size) / 1024);
analyzer_set_memory_size(devc->memory_size);
return SR_OK;
}
SR_PRIV int set_capture_ratio(struct dev_context *devc, uint64_t ratio)
{
if (ratio > 100) {
sr_err("Invalid capture ratio: %" PRIu64 ".", ratio);
return SR_ERR_ARG;
}
devc->capture_ratio = ratio;
sr_info("Setting capture ratio to %d%%.", devc->capture_ratio);
return SR_OK;
}
SR_PRIV void set_triggerbar(struct dev_context *devc)
{
unsigned int ramsize, n, triggerbar;
ramsize = get_memory_size(devc->memory_size) / 4;
if (devc->trigger) {
n = ramsize;
if (devc->max_memory_size < n)
n = devc->max_memory_size;
if (devc->limit_samples < n)
n = devc->limit_samples;
n = n * devc->capture_ratio / 100;
if (n > ramsize - 8)
triggerbar = ramsize - 8;
else
triggerbar = n;
} else {
triggerbar = 0;
}
analyzer_set_triggerbar_address(triggerbar);
analyzer_set_ramsize_trigger_address(ramsize - triggerbar);
sr_dbg("triggerbar_address = %d(0x%x)", triggerbar, triggerbar);
sr_dbg("ramsize_triggerbar_address = %d(0x%x)",
ramsize - triggerbar, ramsize - triggerbar);
}