/*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
*
* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
*
{
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 if (type <= MEMORY_SIZE_8M)
+ return (32 * 1024) << type;
else
return 0;
}
-SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
+SR_PRIV int clz(unsigned int x)
{
- int i;
-
- for (i = 0; zp_supported_samplerates_200[i]; i++)
- if (samplerate == zp_supported_samplerates_200[i])
- break;
-
- if (!zp_supported_samplerates_200[i] || samplerate > devc->max_samplerate) {
- sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
- return SR_ERR_ARG;
+ int n = 0;
+ if (x == 0)
+ return 32;
+ if (!(x & 0xFFFF0000)) {
+ n = n + 16;
+ x = x << 16;
}
-
- sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
-
- if (samplerate >= SR_MHZ(1))
- analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
- else if (samplerate >= SR_KHZ(1))
- analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
- else
- analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
-
- devc->cur_samplerate = samplerate;
-
- return SR_OK;
+ if (!(x & 0xFF000000)) {
+ n = n + 8;
+ x = x << 8;
+ }
+ if (!(x & 0xF0000000)) {
+ n = n + 4;
+ x = x << 4;
+ }
+ if (!(x & 0xC0000000)) {
+ n = n + 2;
+ x = x << 2;
+ }
+ if (!(x & 0x80000000))
+ n = n + 1;
+ return n;
}
SR_PRIV int set_limit_samples(struct dev_context *devc, uint64_t samples)
{
+ if (samples > devc->max_sample_depth)
+ samples = devc->max_sample_depth;
+
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;
+ devc->memory_size = 19 - clz(samples - 1);
sr_info("Setting memory size to %dK.",
get_memory_size(devc->memory_size) / 1024);
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->max_sample_depth < n)
+ n = devc->max_sample_depth;
if (devc->limit_samples < n)
n = devc->limit_samples;
n = n * devc->capture_ratio / 100;