+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * 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 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "output/chronovu-la8: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
-
-struct context {
- unsigned int num_enabled_probes;
- unsigned int unitsize;
- uint64_t trigger_point;
- uint64_t samplerate;
-};
-
-/**
- * Check if the given samplerate is supported by the LA8 hardware.
- *
- * @param samplerate The samplerate (in Hz) to check.
- *
- * @return 1 if the samplerate is supported/valid, 0 otherwise.
- */
-static int is_valid_samplerate(uint64_t samplerate)
-{
- unsigned int i;
-
- for (i = 0; i < 255; i++) {
- if (samplerate == (SR_MHZ(100) / (i + 1)))
- return 1;
- }
-
- sr_warn("%s: invalid samplerate (%" PRIu64 "Hz)",
- __func__, samplerate);
-
- return 0;
-}
-
-/**
- * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
- *
- * LA8 hardware: sample period = (divcount + 1) * 10ns.
- * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
- * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
- *
- * @param samplerate The samplerate in Hz.
- *
- * @return The divcount value as needed by the hardware, or 0xff upon errors.
- */
-static uint8_t samplerate_to_divcount(uint64_t samplerate)
-{
- if (samplerate == 0) {
- sr_warn("%s: samplerate was 0", __func__);
- return 0xff;
- }
-
- if (!is_valid_samplerate(samplerate)) {
- sr_warn("%s: can't get divcount, samplerate invalid", __func__);
- return 0xff;
- }
-
- return (SR_MHZ(100) / samplerate) - 1;
-}
-
-static int init(struct sr_output *o)
-{
- struct context *ctx;
- struct sr_probe *probe;
- GSList *l;
- GVariant *gvar;
-
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!o->sdi) {
- sr_warn("%s: o->sdi was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!o->sdi->driver) {
- sr_warn("%s: o->sdi->driver was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
- sr_warn("%s: ctx malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- o->internal = ctx;
-
- /* Get the unitsize. */
- for (l = o->sdi->probes; l; l = l->next) {
- probe = l->data;
- if (!probe->enabled)
- continue;
- ctx->num_enabled_probes++;
- }
- ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
-
- if (sr_dev_has_option(o->sdi, SR_CONF_SAMPLERATE)) {
- o->sdi->driver->config_get(SR_CONF_SAMPLERATE, &gvar, o->sdi);
- ctx->samplerate = g_variant_get_uint64(gvar);
- g_variant_unref(gvar);
- } else
- ctx->samplerate = 0;
-
- return SR_OK;
-}
-
-static int event(struct sr_output *o, int event_type, uint8_t **data_out,
- uint64_t *length_out)
-{
- struct context *ctx;
- uint8_t *outbuf;
-
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(ctx = o->internal)) {
- sr_warn("%s: o->internal was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!data_out) {
- sr_warn("%s: data_out was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- switch (event_type) {
- case SR_DF_TRIGGER:
- sr_dbg("%s: SR_DF_TRIGGER event", __func__);
- /* Save the trigger point for later (SR_DF_END). */
- ctx->trigger_point = 0; /* TODO: Store _actual_ value. */
- break;
- case SR_DF_END:
- sr_dbg("%s: SR_DF_END event", __func__);
- if (!(outbuf = g_try_malloc(4 + 1))) {
- sr_warn("la8 out: %s: outbuf malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- /* One byte for the 'divcount' value. */
- outbuf[0] = samplerate_to_divcount(ctx->samplerate);
- // if (outbuf[0] == 0xff) {
- // sr_warn("%s: invalid divcount", __func__);
- // return SR_ERR;
- // }
-
- /* Four bytes (little endian) for the trigger point. */
- outbuf[1] = (ctx->trigger_point >> 0) & 0xff;
- outbuf[2] = (ctx->trigger_point >> 8) & 0xff;
- outbuf[3] = (ctx->trigger_point >> 16) & 0xff;
- outbuf[4] = (ctx->trigger_point >> 24) & 0xff;
-
- *data_out = outbuf;
- *length_out = 4 + 1;
- g_free(o->internal);
- o->internal = NULL;
- break;
- default:
- sr_warn("%s: unsupported event type: %d", __func__,
- event_type);
- *data_out = NULL;
- *length_out = 0;
- break;
- }
-
- return SR_OK;
-}
-
-static int data(struct sr_output *o, const uint8_t *data_in,
- uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
-{
- struct context *ctx;
- uint8_t *outbuf;
-
- if (!o) {
- sr_warn("%s: o was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(ctx = o->internal)) {
- sr_warn("%s: o->internal was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!data_in) {
- sr_warn("%s: data_in was NULL", __func__);
- return SR_ERR_ARG;
- }
-
- if (!(outbuf = g_try_malloc0(length_in))) {
- sr_warn("%s: outbuf malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
-
- memcpy(outbuf, data_in, length_in);
-
- *data_out = outbuf;
- *length_out = length_in;
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_output_format output_chronovu_la8 = {
- .id = "chronovu-la8",
- .description = "ChronoVu LA8",
- .df_type = SR_DF_LOGIC,
- .init = init,
- .data = data,
- .event = event,
-};
projects / libsigrok.git / blobdiff