norma dmm: Implemented driver.
This commit is contained in:
Matthias Heidbrink
Uwe Hermann
parent
bfd48770fc
commit
f8e76e2e74
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@ -17,164 +17,321 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "protocol.h"
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static const int32_t hwopts[] = {
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SR_CONF_CONN,
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SR_CONF_SERIALCOMM,
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};
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static const int32_t hwcaps[] = {
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SR_CONF_MULTIMETER,
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SR_CONF_LIMIT_SAMPLES,
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SR_CONF_LIMIT_MSEC,
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SR_CONF_CONTINUOUS,
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};
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#define SERIALCOMM "4800/8n1/dtr=1/rts=0/flow=1"
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SR_PRIV struct sr_dev_driver norma_dmm_driver_info;
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static struct sr_dev_driver *di = &norma_dmm_driver_info;
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static int init(struct sr_context *sr_ctx)
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{
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return std_init(sr_ctx, di, LOG_PREFIX);
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}
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static GSList *scan(GSList *options)
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{
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struct sr_dev_inst *sdi;
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struct drv_context *drvc;
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GSList *devices;
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struct dev_context *devc;
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struct sr_config *src;
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struct sr_probe *probe;
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struct sr_serial_dev_inst *serial;
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GSList *l, *devices;
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int len, cnt;
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const char *conn, *serialcomm;
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char *buf;
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char fmttype[10];
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char req[10];
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int auxtype;
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(void)options;
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#define BUF_MAX (50)
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devices = NULL;
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drvc = di->priv;
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drvc->instances = NULL;
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conn = serialcomm = NULL;
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/* TODO: scan for devices, either based on a SR_CONF_CONN option
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* or on a USB scan. */
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for (l = options; l; l = l->next) {
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src = l->data;
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switch (src->key) {
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case SR_CONF_CONN:
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conn = g_variant_get_string(src->data, NULL);
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break;
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case SR_CONF_SERIALCOMM:
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serialcomm = g_variant_get_string(src->data, NULL);
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break;
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}
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}
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if (!conn)
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return NULL;
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if (!serialcomm)
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serialcomm = SERIALCOMM;
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if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
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return NULL;
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if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
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return NULL;
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serial_flush(serial);
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len = BUF_MAX;
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if (!(buf = g_try_malloc(len))) {
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sr_err("Serial buffer malloc failed.");
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return NULL;
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}
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snprintf(req, sizeof(req), "%s\r\n",
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nmadmm_requests[NMADMM_REQ_IDN].reqstr);
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for (cnt = 0; cnt < 7; cnt++) {
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if (serial_write(serial, req, strlen(req)) == -1) {
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sr_err("Unable to send identification request: %d %s.",
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errno, strerror(errno));
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return NULL;
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}
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len = BUF_MAX;
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serial_readline(serial, &buf, &len, 1500);
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if (!len)
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continue;
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buf[BUF_MAX-1] = '\0';
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/* Match id string, e.g. "1834 065 V1.06,IF V1.02" (DM950) */
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if (g_regex_match_simple("^1834 [^,]*,IF V*", (char*)buf,0,0)) {
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auxtype = xgittoint(buf[7]);
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// TODO: Will this work with non-DM950?
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snprintf(fmttype, sizeof(fmttype), "DM9%d0", auxtype);
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sr_spew("Norma %s DMM %s detected!", fmttype, &buf[9]);
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if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
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"Norma", fmttype, buf + 9)))
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return NULL;
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if (!(devc = g_try_malloc0(sizeof(*devc)))) {
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sr_err("Device context malloc failed.");
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return NULL;
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}
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devc->type = auxtype;
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devc->version = g_strdup(&buf[9]);
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devc->elapsed_msec = g_timer_new();
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sdi->conn = serial;
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sdi->priv = devc;
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sdi->driver = di;
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if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE,
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"P1")))
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return NULL;
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sdi->probes = g_slist_append(sdi->probes, probe);
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drvc->instances = g_slist_append(drvc->instances, sdi);
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devices = g_slist_append(devices, sdi);
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break;
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}
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/* The interface of the DM9x0 contains a cap that needs to
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charge for up to 10s before the interface works, if not powered
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externally. Therefore wait a little to improve chances. */
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if (cnt == 3) {
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sr_info("Waiting 5s to allow interface to settle.");
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g_usleep(5 * 1000 * 1000);
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}
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}
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g_free(buf);
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serial_close(serial);
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if (!devices)
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sr_serial_dev_inst_free(serial);
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return devices;
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}
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static GSList *dev_list(void)
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{
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return ((struct drv_context *)(di->priv))->instances;
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}
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static int dev_clear(void)
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{
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return std_dev_clear(di, NULL);
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}
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static int dev_open(struct sr_dev_inst *sdi)
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{
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(void)sdi;
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struct sr_serial_dev_inst *serial;
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/* TODO: get handle from sdi->conn and open it. */
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serial = sdi->conn;
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if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
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return SR_ERR;
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sdi->status = SR_ST_ACTIVE;
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return SR_OK;
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}
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static int dev_close(struct sr_dev_inst *sdi)
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{
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(void)sdi;
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struct sr_serial_dev_inst *serial;
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struct dev_context *devc;
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/* TODO: get handle from sdi->conn and close it. */
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serial = sdi->conn;
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if (serial && serial->fd != -1) {
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serial_close(serial);
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sdi->status = SR_ST_INACTIVE;
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}
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sdi->status = SR_ST_INACTIVE;
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// Free dynamically allocated resources.
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if ((devc = sdi->priv) && devc->version) {
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g_free(devc->version);
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devc->version = NULL;
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g_timer_destroy(devc->elapsed_msec);
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}
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return SR_OK;
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}
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static int cleanup(void)
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{
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dev_clear();
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/* TODO: free other driver resources, if any. */
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return SR_OK;
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return dev_clear();
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}
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static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
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{
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int ret;
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(void)sdi;
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(void)data;
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ret = SR_OK;
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switch (key) {
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/* TODO */
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default:
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return SR_ERR_NA;
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}
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return ret;
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}
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static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
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{
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int ret;
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(void)data;
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struct dev_context *devc;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR_DEV_CLOSED;
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ret = SR_OK;
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switch (key) {
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/* TODO */
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default:
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ret = SR_ERR_NA;
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if (!(devc = sdi->priv)) {
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sr_err("sdi->priv was NULL.");
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return SR_ERR_BUG;
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}
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return ret;
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}
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static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
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{
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int ret;
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(void)sdi;
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(void)data;
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ret = SR_OK;
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switch (key) {
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/* TODO */
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case SR_CONF_LIMIT_MSEC:
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/* TODO: not yet implemented */
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if (g_variant_get_uint64(data) == 0) {
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sr_err("LIMIT_MSEC can't be 0.");
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return SR_ERR;
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}
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devc->limit_msec = g_variant_get_uint64(data);
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sr_dbg("Setting time limit to %" PRIu64 "ms.",
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devc->limit_msec);
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break;
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case SR_CONF_LIMIT_SAMPLES:
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devc->limit_samples = g_variant_get_uint64(data);
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sr_dbg("Setting sample limit to %" PRIu64 ".",
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devc->limit_samples);
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break;
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default:
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return SR_ERR_NA;
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}
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return ret;
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return SR_OK;
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}
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static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
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{
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(void)sdi;
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switch (key) {
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case SR_CONF_SCAN_OPTIONS:
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*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
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hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
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break;
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case SR_CONF_DEVICE_OPTIONS:
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*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
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hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
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break;
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default:
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return SR_ERR_NA;
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}
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return SR_OK;
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}
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static int dev_acquisition_start(const struct sr_dev_inst *sdi,
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void *cb_data)
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{
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struct dev_context *devc;
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struct sr_serial_dev_inst *serial;
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(void)sdi;
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(void)cb_data;
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if (!sdi || !cb_data || !(devc = sdi->priv))
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return SR_ERR_BUG;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR_DEV_CLOSED;
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/* TODO: configure hardware, reset acquisition state, set up
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* callbacks and send header packet. */
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devc->cb_data = cb_data;
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/* Send header packet to the session bus. */
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std_session_send_df_header(cb_data, LOG_PREFIX);
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/* Start timer, if required. */
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if (devc->limit_msec)
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g_timer_start(devc->elapsed_msec);
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/* Poll every 100ms, or whenever some data comes in. */
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serial = sdi->conn;
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sr_source_add(serial->fd, G_IO_IN, 100, norma_dmm_receive_data,
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(void *)sdi);
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return SR_OK;
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}
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static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
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{
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(void)cb_data;
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struct dev_context *devc;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR_DEV_CLOSED;
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/* Stop timer, if required. */
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if (sdi && (devc = sdi->priv) && devc->limit_msec)
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g_timer_stop(devc->elapsed_msec);
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/* TODO: stop acquisition. */
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return SR_OK;
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return std_dev_acquisition_stop_serial(sdi, cb_data, dev_close,
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sdi->conn, LOG_PREFIX);
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}
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SR_PRIV struct sr_dev_driver norma_dmm_driver_info = {
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.name = "norma-dmm",
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.longname = "norma-dmm",
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.longname = "Norma DM910..950, Siemens B1024..1028 DMMs",
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.api_version = 1,
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.init = init,
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.cleanup = cleanup,
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.scan = scan,
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.dev_list = dev_list,
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.dev_clear = dev_clear,
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.config_get = config_get,
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.config_get = NULL,
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.config_set = config_set,
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.config_list = config_list,
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.dev_open = dev_open,
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@ -19,10 +19,308 @@
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#include "protocol.h"
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#include <ctype.h>
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#include <errno.h>
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#include <math.h>
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#include <string.h>
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static int nma_send_req(const struct sr_dev_inst *sdi, enum nmadmm_req_t reqt,
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char* params);
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/** Convert hexadecimal digit to int.
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* \param[in] xgit Hexadecimal digit to convert.
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* \return Int value of xgit (0 on invalid xgit).
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*/
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SR_PRIV int xgittoint(char xgit)
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{
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if ((xgit >= '0') && (xgit <= '9'))
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return xgit - '0';
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xgit = tolower(xgit);
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if ((xgit >= 'a') && (xgit <= 'f'))
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return xgit - 'a';
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return 0;
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}
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/** Process received line. It consists of 20 hex digits + \r\n,
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* e.g. '08100400018100400000'. */
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static void nma_process_line(const struct sr_dev_inst *sdi)
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{
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struct dev_context *devc;
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int pos, flags;
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int vt, range; /* Measurement value type, range in device format */
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int mmode, devstat; /* Measuring mode, device status */
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float value; /* Measured value */
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float scale; /* Scaling factor depending on range and function */
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struct sr_datafeed_analog analog;
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struct sr_datafeed_packet packet;
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devc = sdi->priv;
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devc->buf[20] = '\0';
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sr_spew("Received line '%s'.", devc->buf);
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/* Check line */
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if (strlen((char*)devc->buf) != 20) {
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sr_err("line: Invalid status '%s', must be 20 hex digits");
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devc->buflen = 0;
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return;
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}
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for (pos = 0; pos < 20; pos++)
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if (!isxdigit(devc->buf[pos])) {
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sr_err("line: Expected hex digit in '%s' at pos %d!",
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devc->buf, pos);
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devc->buflen = 0;
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return;
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}
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/* Start decoding. */
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value = 0.0;
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scale = 1.0;
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memset(&analog, 0, sizeof(analog));
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/* The numbers are hex digits, starting from 0. */
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/* 0: Keyboard status, currently not interesting. */
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/* 1: Central switch status, currently not interesting. */
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/* 2: Type of measured value */
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vt = xgittoint(devc->buf[2]);
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switch (vt) {
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case 0: analog.mq = SR_MQ_VOLTAGE;
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break;
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case 1: analog.mq = SR_MQ_CURRENT; // 2A
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break;
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case 2: analog.mq = SR_MQ_RESISTANCE;
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break;
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case 3: analog.mq = SR_MQ_CAPACITANCE;
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break;
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case 4: analog.mq = SR_MQ_TEMPERATURE;
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break;
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case 5: analog.mq = SR_MQ_FREQUENCY;
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break;
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case 6: analog.mq = SR_MQ_CURRENT; // 10A
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break;
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case 7: analog.mq = SR_MQ_GAIN; // TODO: Scale factor
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break;
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case 8: analog.mq = SR_MQ_GAIN; // Percentage
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scale /= 100.0;
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break;
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case 9: analog.mq = SR_MQ_GAIN; // dB
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scale /= 100.0;
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break;
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default:sr_err("Unknown value type 0x%02x", vt);
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break;
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}
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/* 3: Measurement range for measured value */
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range = xgittoint(devc->buf[3]);
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switch (vt) {
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case 0: // V
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scale *= pow(10.0, range - 5);
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break;
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case 1: // A
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scale *= pow(10.0, range - 7);
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break;
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case 2: // Ω
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scale *= pow(10.0, range - 2);
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break;
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case 3: // F
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scale *= pow(10.0, range - 12);
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break;
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case 4: // °C
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scale *= pow(10.0, range - 1);
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break;
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case 5: // Hz
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scale *= pow(10.0, range - 2);
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break;
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// No default, other value types have fixed display format
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}
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/* 5: Sign and 1st digit */
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flags = xgittoint(devc->buf[5]);
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value = (flags & 0x03);
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if (flags & 0x04) scale *= -1;
|
||||
/* 6-9: 2nd-4th digit */
|
||||
for (pos = 6; pos < 10; pos++)
|
||||
value = value * 10 + xgittoint(devc->buf[pos]);
|
||||
value *= scale;
|
||||
|
||||
/* 10: Display counter */
|
||||
mmode = xgittoint(devc->buf[10]);
|
||||
switch (mmode) {
|
||||
case 0: /* Frequency */
|
||||
analog.unit = SR_UNIT_HERTZ;
|
||||
break;
|
||||
case 1: /* V TRMS, only type 5 */
|
||||
analog.unit = SR_UNIT_VOLT;
|
||||
analog.mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
|
||||
break;
|
||||
case 2: /* V AC */
|
||||
analog.unit = SR_UNIT_VOLT;
|
||||
analog.mqflags |= SR_MQFLAG_AC;
|
||||
if (devc->type >= 3) analog.mqflags |= SR_MQFLAG_RMS;
|
||||
break;
|
||||
case 3: /* V DC */
|
||||
analog.unit = SR_UNIT_VOLT;
|
||||
analog.mqflags |= SR_MQFLAG_DC;
|
||||
break;
|
||||
case 4: /* Ohm */
|
||||
analog.unit = SR_UNIT_OHM;
|
||||
break;
|
||||
case 5: /* Continuity */
|
||||
analog.unit = SR_UNIT_BOOLEAN;
|
||||
analog.mq = SR_MQ_CONTINUITY;
|
||||
/* TODO Continuity handling is a bit odd in sigrok. */
|
||||
break;
|
||||
case 6: /* Degree Celsius */
|
||||
analog.unit = SR_UNIT_CELSIUS;
|
||||
break;
|
||||
case 7: /* Capacity */
|
||||
analog.unit = SR_UNIT_FARAD;
|
||||
break;
|
||||
case 8: /* Current DC */
|
||||
analog.unit = SR_UNIT_AMPERE;
|
||||
analog.mqflags |= SR_MQFLAG_DC;
|
||||
break;
|
||||
case 9: /* Current AC */
|
||||
analog.unit = SR_UNIT_AMPERE;
|
||||
analog.mqflags |= SR_MQFLAG_AC;
|
||||
if (devc->type >= 3) analog.mqflags |= SR_MQFLAG_RMS;
|
||||
break;
|
||||
case 0xA:/* Current TRMS, only type 5 */
|
||||
analog.unit = SR_UNIT_AMPERE;
|
||||
analog.mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
|
||||
break;
|
||||
case 0x0B:/* Diode */
|
||||
analog.unit = SR_UNIT_VOLT;
|
||||
analog.mqflags |= (SR_MQFLAG_DIODE | SR_MQFLAG_DC);
|
||||
break;
|
||||
default:
|
||||
sr_err("unknown mmode 0x%02x", mmode);
|
||||
break;
|
||||
}
|
||||
|
||||
/* 11: Device status */
|
||||
devstat = xgittoint(devc->buf[11]);
|
||||
|
||||
switch (devstat) {
|
||||
case 1: // Normal measurement
|
||||
break;
|
||||
case 2: // Input loop (limit, reference values)
|
||||
break;
|
||||
case 3: // TRANS/SENS
|
||||
break;
|
||||
case 4: // Error
|
||||
sr_err("Device error. Fuse?"); // TODO: Wirklich abbrechen???
|
||||
devc->buflen = 0;
|
||||
return; // Cannot continue.
|
||||
default:
|
||||
sr_err("Unknown device status 0x02x", devstat);
|
||||
break;
|
||||
}
|
||||
|
||||
/* 12-19: Flags and display symbols */
|
||||
/* 12, 13 */
|
||||
flags = (xgittoint(devc->buf[12]) << 8) | xgittoint(devc->buf[13]);
|
||||
/* 0x80: PRINT TODO: Stop polling when discovered? */
|
||||
/* 0x40: EXTR */
|
||||
if (analog.mq == SR_MQ_CONTINUITY) {
|
||||
if (flags & 0x20) value = 1.0; /* Beep */
|
||||
else value = 0.0;
|
||||
}
|
||||
/* 0x10: AVG */
|
||||
/* 0x08: Diode */
|
||||
if (flags & 0x04) /* REL */
|
||||
analog.mqflags |= SR_MQFLAG_RELATIVE;
|
||||
/* 0x02: SHIFT */
|
||||
if (flags & 0x01) /* % */
|
||||
analog.unit = SR_UNIT_PERCENTAGE;
|
||||
|
||||
/* 14, 15 */
|
||||
flags = (xgittoint(devc->buf[14]) << 8) | xgittoint(devc->buf[15]);
|
||||
if (!(flags & 0x80)) /* MAN Manual range */
|
||||
analog.mqflags |= SR_MQFLAG_AUTORANGE;
|
||||
if (flags & 0x40)/* LOBAT1 Low battery,measurement still within specs.*/
|
||||
devc->lowbatt = 1;
|
||||
/* 0x20: PEAK */
|
||||
/* 0x10: COUNT */
|
||||
if (flags & 0x08) // HOLD
|
||||
analog.mqflags |= SR_MQFLAG_HOLD;
|
||||
/* 0x04: LIMIT */
|
||||
if (flags & 0x02) // MAX
|
||||
analog.mqflags |= SR_MQFLAG_MAX;
|
||||
if (flags & 0x01) // MIN
|
||||
analog.mqflags |= SR_MQFLAG_MIN;
|
||||
|
||||
/* 16, 17 */
|
||||
flags = (xgittoint(devc->buf[16]) << 8) | xgittoint(devc->buf[17]);
|
||||
/* 0xe0: undefined */
|
||||
if (flags & 0x10) { /* LOBATT2 Low battery, measurement inaccurate */
|
||||
devc->lowbatt = 2;
|
||||
sr_warn("Low battery, measurement quality degraded!");
|
||||
}
|
||||
/* 0x08: SCALED */
|
||||
/* 0x04: RATE (=lower resolution, allows higher rata rate up to 10/s. */
|
||||
/* 0x02: Current Clamp */
|
||||
if (flags & 0x01) { /* dB */
|
||||
if (analog.unit == SR_UNIT_VOLT)
|
||||
analog.unit = SR_UNIT_DECIBEL_VOLT;
|
||||
/* TODO: The Norma has an adjustable dB reference value. If
|
||||
* changed from default, this is not correct. */
|
||||
else
|
||||
analog.unit = SR_UNIT_UNITLESS;
|
||||
}
|
||||
|
||||
/* 18, 19 */
|
||||
/* flags = (xgittoint(devc->buf[18]) << 8) | xgittoint(devc->buf[19]);*/
|
||||
/* 0x80: Undefined. */
|
||||
/* 0x40: Remote mode, keyboard locked */
|
||||
/* 0x38: Undefined. */
|
||||
/* 0x04: MIN>MAX */
|
||||
/* 0x02: Measured value < Min */
|
||||
/* 0x01: Measured value > Max */
|
||||
|
||||
/* 4: Flags. Evaluating this after setting value! */
|
||||
flags = xgittoint(devc->buf[4]);
|
||||
if (flags & 0x04) { // Invalid value
|
||||
value = NAN;
|
||||
}
|
||||
else if (flags & 0x01) { // Overload
|
||||
value = INFINITY;
|
||||
}
|
||||
if (flags & 0x02) { // Duplicate value, has been sent before.
|
||||
sr_spew("Duplicate value, dismissing!");
|
||||
devc->buflen = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
sr_spew("range=%d/scale=%f/value=%f",range,(double)scale,(double)value);
|
||||
|
||||
/* Finish and send packet */
|
||||
analog.probes = sdi->probes;
|
||||
analog.num_samples = 1;
|
||||
analog.data = &value;
|
||||
|
||||
memset(&packet, 0, sizeof(packet));
|
||||
packet.type = SR_DF_ANALOG;
|
||||
packet.payload = &analog;
|
||||
sr_session_send(devc->cb_data, &packet);
|
||||
|
||||
/* Finish processing */
|
||||
devc->num_samples++;
|
||||
devc->buflen = 0;
|
||||
}
|
||||
|
||||
|
||||
SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data)
|
||||
{
|
||||
const struct sr_dev_inst *sdi;
|
||||
struct sr_dev_inst *sdi;
|
||||
struct dev_context *devc;
|
||||
struct sr_serial_dev_inst *serial;
|
||||
int len;
|
||||
gboolean terminating;
|
||||
|
||||
(void)fd;
|
||||
|
||||
|
|
@ -32,9 +330,83 @@ SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data)
|
|||
if (!(devc = sdi->priv))
|
||||
return TRUE;
|
||||
|
||||
serial = sdi->conn;
|
||||
if (revents == G_IO_IN) {
|
||||
/* TODO */
|
||||
/* Serial data arrived. */
|
||||
while(NMADMM_BUFSIZE - devc->buflen - 1 > 0) {
|
||||
len = serial_read(serial, devc->buf + devc->buflen, 1);
|
||||
if (len < 1)
|
||||
break;
|
||||
devc->buflen += len;
|
||||
*(devc->buf + devc->buflen) = '\0';
|
||||
if (*(devc->buf + devc->buflen - 1) == '\n') {
|
||||
/* TODO: According to specs, should be \r, but
|
||||
* then we'd have to get rid of the \n */
|
||||
devc->last_req_pending = FALSE;
|
||||
nma_process_line(sdi);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// If number of samples or time limit reached, stop aquisition.
|
||||
terminating = FALSE;
|
||||
if (devc->limit_samples && (devc->num_samples >= devc->limit_samples)) {
|
||||
sdi->driver->dev_acquisition_stop(sdi, cb_data);
|
||||
terminating = TRUE;
|
||||
}
|
||||
|
||||
if (devc->limit_msec) {
|
||||
gdouble elapsed_s = g_timer_elapsed(devc->elapsed_msec, NULL);
|
||||
if ((elapsed_s * 1000) >= devc->limit_msec) {
|
||||
sdi->driver->dev_acquisition_stop(sdi, cb_data);
|
||||
terminating = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
// Request next package
|
||||
if (!terminating && !devc->last_req_pending) {
|
||||
if (nma_send_req(sdi, NMADMM_REQ_STATUS, NULL) != SR_OK)
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
|
||||
static int nma_send_req(const struct sr_dev_inst *sdi, enum nmadmm_req_t req,
|
||||
char* params)
|
||||
{
|
||||
struct sr_serial_dev_inst *serial;
|
||||
struct dev_context *devc;
|
||||
char buf[NMADMM_BUFSIZE];
|
||||
int len;
|
||||
|
||||
|
||||
if (!sdi || !(serial = sdi->conn) || !(devc = sdi->priv))
|
||||
return SR_ERR_BUG;
|
||||
|
||||
len = snprintf(buf, sizeof(buf), "%s%s\r\n",
|
||||
nmadmm_requests[req].reqstr, params?params:"");
|
||||
|
||||
sr_spew("Sending request: '%s'", buf);
|
||||
|
||||
devc->last_req = req;
|
||||
devc->last_req_pending = TRUE;
|
||||
|
||||
if (serial_write(serial, buf, len) == -1) {
|
||||
sr_err("Unable to send request: %d %s.",
|
||||
errno, strerror(errno));
|
||||
devc->last_req_pending = FALSE;
|
||||
return SR_ERR;
|
||||
}
|
||||
|
||||
return SR_OK;
|
||||
}
|
||||
|
||||
|
||||
SR_PRIV const struct nmadmm_req nmadmm_requests[] = {
|
||||
{ NMADMM_REQ_IDN, "IDN?"},
|
||||
{ NMADMM_REQ_IDN, "STATUS?"},
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
|
|
|||
|
|
@ -34,18 +34,48 @@
|
|||
#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
|
||||
#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
|
||||
|
||||
#define NMADMM_BUFSIZE 256
|
||||
|
||||
/** Norma DMM request types (used ones only, the multimeters support about 50).
|
||||
*/
|
||||
enum nmadmm_req_t {
|
||||
NMADMM_REQ_IDN = 0, /**< Request identity */
|
||||
NMADMM_REQ_STATUS, /**< Request device status (value + ...) */
|
||||
};
|
||||
|
||||
/** Defines requests used to communicate with device. */
|
||||
struct nmadmm_req {
|
||||
enum nmadmm_req_t req_t; /** Request type. */
|
||||
const char* reqstr; /** Request string */
|
||||
};
|
||||
|
||||
/** Strings for requests. */
|
||||
extern const struct nmadmm_req nmadmm_requests[];
|
||||
|
||||
/** Private, per-device-instance driver context. */
|
||||
struct dev_context {
|
||||
/* Model-specific information */
|
||||
|
||||
char* version; /**< Version string */
|
||||
int type; /**< DM9x0, e.g. 5 = DM950 */
|
||||
/* Acquisition settings */
|
||||
uint64_t limit_samples; /**< Target number of samples */
|
||||
uint64_t limit_msec; /**< Target sampling time */
|
||||
|
||||
/* Opaque pointer passed in by frontend. */
|
||||
void *cb_data;
|
||||
|
||||
/* Operational state */
|
||||
|
||||
enum nmadmm_req_t last_req; /**< Last request. */
|
||||
gboolean last_req_pending; /**< Last request not answered yet.*/
|
||||
int lowbatt; /**< Low battery. 1=low, 2=critical.*/
|
||||
/* Temporary state across callbacks */
|
||||
|
||||
uint64_t num_samples; /**< Current #samples. */
|
||||
GTimer* elapsed_msec; /**< Used for sampling with limit_msec*/
|
||||
unsigned char buf[NMADMM_BUFSIZE]; /**< Buffer for read callback */
|
||||
int buflen; /**< Data len in buf */
|
||||
};
|
||||
|
||||
SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data);
|
||||
SR_PRIV int xgittoint(char xgit);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue