+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
- * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li>
- *
- * 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 "libsigrok.h"
-#include "libsigrok-internal.h"
-
-#include <glib.h>
-#include <string.h>
-
-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "scpi_serial: "
-#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
-#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
-#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
-#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
-#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
-
-#define SCPI_READ_RETRIES 100
-#define SCPI_READ_RETRY_TIMEOUT 10000
-
-SR_PRIV int scpi_serial_open(void *priv)
-{
- struct sr_serial_dev_inst *serial = priv;
-
- if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
- return SR_ERR;
-
- if (serial_flush(serial) != SR_OK)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV int scpi_serial_source_add(void *priv, int events, int timeout,
- sr_receive_data_callback_t cb, void *cb_data)
-{
- struct sr_serial_dev_inst *serial = priv;
-
- return sr_source_add(serial->fd, events, timeout, cb, cb_data);
-}
-
-SR_PRIV int scpi_serial_source_remove(void *priv)
-{
- struct sr_serial_dev_inst *serial = priv;
-
- return sr_source_remove(serial->fd);
-}
-
-SR_PRIV int scpi_serial_send(void *priv, const char *command)
-{
- int len, out;
- gchar *terminated_command;
- struct sr_serial_dev_inst *serial = priv;
-
- terminated_command = g_strconcat(command, "\n", NULL);
- len = strlen(terminated_command);
- out = serial_write(serial, terminated_command, len);
- g_free(terminated_command);
-
- if (out != len) {
- sr_dbg("Only sent %d/%d bytes of SCPI command: '%s'.", out,
- len, command);
- return SR_ERR;
- }
-
- sr_spew("Successfully sent SCPI command: '%s'.", command);
-
- return SR_OK;
-}
-
-SR_PRIV int scpi_serial_receive(void *priv, char **scpi_response)
-{
- int len, ret;
- char buf[256];
- unsigned int i;
- GString *response;
- struct sr_serial_dev_inst *serial = priv;
-
- response = g_string_sized_new(1024);
-
- for (i = 0; i <= SCPI_READ_RETRIES; i++) {
- while ((len = serial_read(serial, buf, sizeof(buf))) > 0)
- response = g_string_append_len(response, buf, len);
-
- if (response->len > 0 &&
- response->str[response->len-1] == '\n') {
- sr_spew("Fetched full SCPI response.");
- break;
- }
-
- g_usleep(SCPI_READ_RETRY_TIMEOUT);
- }
-
- if (response->len == 0) {
- sr_dbg("No SCPI response received.");
- g_string_free(response, TRUE);
- *scpi_response = NULL;
- return SR_ERR;
- } else if (response->str[response->len - 1] == '\n') {
- /*
- * The SCPI response contains a LF ('\n') at the end and we
- * don't need this so replace it with a '\0' and decrement
- * the length.
- */
- response->str[--response->len] = '\0';
- ret = SR_OK;
- } else {
- sr_warn("Incomplete SCPI response received!");
- ret = SR_ERR;
- }
-
- /* Minor optimization: steal the string instead of copying. */
- *scpi_response = response->str;
-
- /* A SCPI response can be quite large, print at most 50 characters. */
- sr_dbg("SCPI response received (length %d): '%.50s'",
- response->len, response->str);
-
- g_string_free(response, FALSE);
-
- return ret;
-}
-
-/* Some stubs to keep the compiler from whining. */
-static int scpi_serial_read(void *priv, char *buf, int maxlen)
-{
- return serial_read(priv, buf, maxlen);
-}
-static int scpi_serial_close(void *priv)
-{
- return serial_close(priv);
-}
-static void scpi_serial_free(void *priv)
-{
- return sr_serial_dev_inst_free(priv);
-}
-
-SR_PRIV struct sr_scpi_dev_inst *scpi_serial_dev_inst_new(const char *port,
- const char *serialcomm)
-{
- struct sr_scpi_dev_inst *scpi;
- struct sr_serial_dev_inst *serial;
-
- scpi = g_try_malloc(sizeof(struct sr_scpi_dev_inst));
-
- if (!(serial = sr_serial_dev_inst_new(port, serialcomm)))
- {
- g_free(scpi);
- return NULL;
- }
-
- scpi->open = scpi_serial_open;
- scpi->source_add = scpi_serial_source_add;
- scpi->source_remove = scpi_serial_source_remove;
- scpi->send = scpi_serial_send;
- scpi->receive = scpi_serial_receive;
- scpi->read = scpi_serial_read;
- scpi->close = scpi_serial_close;
- scpi->free = scpi_serial_free;
- scpi->priv = serial;
-
- return scpi;
-}
projects / libsigrok.git / blobdiff