+++ /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 <stdlib.h>
-#include <string.h>
-
-#define LOG_PREFIX "scpi_serial"
-
-#define BUFFER_SIZE 1024
-
-struct scpi_serial {
- struct sr_serial_dev_inst *serial;
- char buffer[BUFFER_SIZE];
- size_t count;
- size_t read;
-};
-
-static struct {
- uint16_t vendor_id;
- uint16_t product_id;
- const char *serialcomm;
-} scpi_serial_usb_ids[] = {
- { 0x0403, 0xed72, "115200/8n1/flow=1" }, /* Hameg HO720 */
- { 0x0403, 0xed73, "115200/8n1/flow=1" }, /* Hameg HO730 */
-};
-
-static GSList *scpi_serial_scan(struct drv_context *drvc)
-{
- GSList *l, *r, *resources = NULL;
- gchar *res;
- unsigned i;
-
- (void)drvc;
-
- for (i = 0; i < ARRAY_SIZE(scpi_serial_usb_ids); i++) {
- if ((l = sr_serial_find_usb(scpi_serial_usb_ids[i].vendor_id,
- scpi_serial_usb_ids[i].product_id)) == NULL)
- continue;
- for (r = l; r; r = r->next) {
- if (scpi_serial_usb_ids[i].serialcomm)
- res = g_strdup_printf("%s:%s", (char *) r->data,
- scpi_serial_usb_ids[i].serialcomm);
- else
- res = g_strdup(r->data);
- resources = g_slist_append(resources, res);
- }
- g_slist_free_full(l, g_free);
- }
-
- return resources;
-}
-
-static int scpi_serial_dev_inst_new(void *priv, struct drv_context *drvc,
- const char *resource, char **params, const char *serialcomm)
-{
- struct scpi_serial *sscpi = priv;
-
- (void)drvc;
- (void)params;
-
- if (!(sscpi->serial = sr_serial_dev_inst_new(resource, serialcomm)))
- return SR_ERR;
-
- return SR_OK;
-}
-
-static int scpi_serial_open(void *priv)
-{
- struct scpi_serial *sscpi = priv;
- struct sr_serial_dev_inst *serial = sscpi->serial;
-
- if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
- return SR_ERR;
-
- if (serial_flush(serial) != SR_OK)
- return SR_ERR;
-
- sscpi->count = 0;
- sscpi->read = 0;
-
- return SR_OK;
-}
-
-static int scpi_serial_source_add(struct sr_session *session, void *priv,
- int events, int timeout, sr_receive_data_callback cb, void *cb_data)
-{
- struct scpi_serial *sscpi = priv;
- struct sr_serial_dev_inst *serial = sscpi->serial;
-
- return serial_source_add(session, serial, events, timeout, cb, cb_data);
-}
-
-static int scpi_serial_source_remove(struct sr_session *session, void *priv)
-{
- struct scpi_serial *sscpi = priv;
- struct sr_serial_dev_inst *serial = sscpi->serial;
-
- return serial_source_remove(session, serial);
-}
-
-static int scpi_serial_send(void *priv, const char *command)
-{
- int len, result, written;
- gchar *terminated_command;
- struct scpi_serial *sscpi = priv;
- struct sr_serial_dev_inst *serial = sscpi->serial;
-
- terminated_command = g_strconcat(command, "\n", NULL);
- len = strlen(terminated_command);
- written = 0;
- while (written < len) {
- result = serial_write(serial, terminated_command + written, len - written);
- if (result < 0) {
- sr_err("Error while sending SCPI command: '%s'.", command);
- g_free(terminated_command);
- return SR_ERR;
- }
- written += result;
- }
-
- g_free(terminated_command);
-
- sr_spew("Successfully sent SCPI command: '%s'.", command);
-
- return SR_OK;
-}
-
-static int scpi_serial_read_begin(void *priv)
-{
- (void) priv;
-
- return SR_OK;
-}
-
-static int scpi_serial_read_data(void *priv, char *buf, int maxlen)
-{
- struct scpi_serial *sscpi = priv;
- int len, ret;
-
- len = BUFFER_SIZE - sscpi->count;
-
- /* Try to read new data into the buffer if there is space. */
- if (len > 0) {
- ret = serial_read(sscpi->serial, sscpi->buffer + sscpi->read,
- BUFFER_SIZE - sscpi->count);
-
- if (ret < 0)
- return ret;
-
- sscpi->count += ret;
-
- if (ret > 0)
- sr_spew("Read %d bytes into buffer.", ret);
- }
-
- /* Return as many bytes as possible from buffer, excluding any trailing newline. */
- if (sscpi->read < sscpi->count) {
- len = sscpi->count - sscpi->read;
- if (len > maxlen)
- len = maxlen;
- if (sscpi->buffer[sscpi->read + len - 1] == '\n')
- len--;
- sr_spew("Returning %d bytes from buffer.", len);
- memcpy(buf, sscpi->buffer + sscpi->read, len);
- sscpi->read += len;
- if (sscpi->read == BUFFER_SIZE) {
- sr_spew("Resetting buffer.");
- sscpi->count = 0;
- sscpi->read = 0;
- }
- return len;
- }
-
- return 0;
-}
-
-static int scpi_serial_read_complete(void *priv)
-{
- struct scpi_serial *sscpi = priv;
-
- /* If the next character is a newline, discard it and report complete. */
- if (sscpi->read < sscpi->count && sscpi->buffer[sscpi->read] == '\n') {
- sscpi->read++;
- return 1;
- } else {
- return 0;
- }
-}
-
-static int scpi_serial_close(void *priv)
-{
- struct scpi_serial *sscpi = priv;
-
- return serial_close(sscpi->serial);
-}
-
-static void scpi_serial_free(void *priv)
-{
- struct scpi_serial *sscpi = priv;
-
- sr_serial_dev_inst_free(sscpi->serial);
-}
-
-SR_PRIV const struct sr_scpi_dev_inst scpi_serial_dev = {
- .name = "serial",
- .prefix = "",
- .priv_size = sizeof(struct scpi_serial),
- .scan = scpi_serial_scan,
- .dev_inst_new = scpi_serial_dev_inst_new,
- .open = scpi_serial_open,
- .source_add = scpi_serial_source_add,
- .source_remove = scpi_serial_source_remove,
- .send = scpi_serial_send,
- .read_begin = scpi_serial_read_begin,
- .read_data = scpi_serial_read_data,
- .read_complete = scpi_serial_read_complete,
- .close = scpi_serial_close,
- .free = scpi_serial_free,
-};
projects / libsigrok.git / blobdiff