]> sigrok.org Git - libsigrok.git/blobdiff - src/hardware/hung-chang-dso-2100/api.c
sr_dev_close(): Set status to SR_ST_INACTIVE.
[libsigrok.git] / src / hardware / hung-chang-dso-2100 / api.c
index d3c3c2865a2fc66af2078c74dc6f10c2d9439c55..0aa012a1a3b54e90d1ed3a15137aa565e8eefac0 100644 (file)
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
+#include <ieee1284.h>
+#include <string.h>
 #include "protocol.h"
 
-SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info;
+static const uint32_t scanopts[] = {
+       SR_CONF_CONN,
+};
+
+static const uint32_t drvopts[] = {
+       SR_CONF_OSCILLOSCOPE,
+};
+
+static const uint32_t devopts[] = {
+       SR_CONF_CONN | SR_CONF_GET,
+       SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
+       SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+       SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+       SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+       SR_CONF_BUFFERSIZE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+};
+
+static const uint32_t cgopts[] = {
+       SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+       SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+       SR_CONF_PROBE_FACTOR | SR_CONF_GET | SR_CONF_SET,
+};
+
+static const uint64_t samplerates[] = {
+       SR_MHZ(100), SR_MHZ(50),  SR_MHZ(25),   SR_MHZ(20),
+       SR_MHZ(10),  SR_MHZ(5),   SR_KHZ(2500), SR_MHZ(2),
+       SR_MHZ(1),   SR_KHZ(500), SR_KHZ(250),  SR_KHZ(200),
+       SR_KHZ(100), SR_KHZ(50),  SR_KHZ(25),   SR_KHZ(20),
+       SR_KHZ(10),  SR_KHZ(5),   SR_HZ(2500),  SR_KHZ(2),
+       SR_KHZ(1),   SR_HZ(500),  SR_HZ(250),   SR_HZ(200),
+       SR_HZ(100),  SR_HZ(50),   SR_HZ(25),    SR_HZ(20)
+};
+
+/* must be in sync with readout_steps[] in protocol.c */
+static const uint64_t buffersizes[] = {
+       2 * 500, 3 * 500, 4 * 500, 5 * 500,
+       6 * 500, 7 * 500, 8 * 500, 9 * 500, 10 * 500,
+       12 * 500 - 2, 14 * 500 - 2, 16 * 500 - 2,
+       18 * 500 - 2, 20 * 500 - 2, 10240 - 2
+};
+
+static const uint64_t vdivs[][2] = {
+       { 10, 1000 },
+       { 20, 1000 },
+       { 50, 1000 },
+       { 100, 1000 },
+       { 200, 1000 },
+       { 500, 1000 },
+       { 1, 1 },
+       { 2, 1 },
+       { 5, 1 },
+};
+
+/* Bits 4 and 5 enable relays that add /10 filters to the chain
+ * Bits 0 and 1 select an output from a resistor array */
+static const uint8_t vdivs_map[] = {
+       0x01, 0x02, 0x03, 0x21, 0x22, 0x23, 0x31, 0x32, 0x33
+};
+
+
+static const char *trigger_sources[] = {
+       "A", "B", "EXT"
+};
+
+static const uint8_t trigger_sources_map[] = {
+       0x00, 0x80, 0x40
+};
+
+static const char *trigger_slopes[] = {
+       "f", "r"
+};
 
-static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
+static const char *coupling[] = {
+       "DC", "AC", "GND"
+};
+
+static const uint8_t coupling_map[] = {
+       0x00, 0x08, 0x04
+};
+
+static GSList *scan_port(GSList *devices, struct parport *port)
 {
-       return std_init(sr_ctx, di, LOG_PREFIX);
+       struct sr_dev_inst *sdi;
+       struct sr_channel *ch;
+       struct sr_channel_group *cg;
+       struct dev_context *devc;
+       int i;
+
+       if (ieee1284_open(port, 0, &i) != E1284_OK) {
+               sr_err("Can't open parallel port %s", port->name);
+               goto fail1;
+       }
+
+       if ((i & (CAP1284_RAW | CAP1284_BYTE)) != (CAP1284_RAW | CAP1284_BYTE)) {
+               sr_err("Parallel port %s does not provide low-level bidirection access",
+                      port->name);
+               goto fail2;
+       }
+
+       if (ieee1284_claim(port) != E1284_OK) {
+               sr_err("Parallel port %s already in use", port->name);
+               goto fail2;
+       }
+
+       if (!hung_chang_dso_2100_check_id(port))
+               goto fail3;
+
+       sdi = g_malloc0(sizeof(struct sr_dev_inst));
+       sdi->status = SR_ST_INACTIVE;
+       sdi->vendor = g_strdup("Hung-Chang");
+       sdi->model = g_strdup("DSO-2100");
+       sdi->inst_type = 0; /* FIXME */
+       sdi->conn = port;
+       ieee1284_ref(port);
+
+       for (i = 0; i < NUM_CHANNELS; i++) {
+               cg = g_malloc0(sizeof(struct sr_channel_group));
+               cg->name = g_strdup(trigger_sources[i]);
+               ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, FALSE, trigger_sources[i]);
+               cg->channels = g_slist_append(cg->channels, ch);
+               sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
+       }
+
+       devc = g_malloc0(sizeof(struct dev_context));
+       devc->enabled_channel = g_slist_append(NULL, NULL);
+       devc->channel = 0;
+       devc->rate = 0;
+       devc->probe[0] = 10;
+       devc->probe[1] = 10;
+       devc->cctl[0] = 0x31; /* 1V/div, DC coupling, trigger on channel A*/
+       devc->cctl[1] = 0x31; /* 1V/div, DC coupling, no tv sync trigger */
+       devc->edge = 0;
+       devc->tlevel = 0x80;
+       devc->pos[0] = 0x80;
+       devc->pos[1] = 0x80;
+       devc->offset[0] = 0x80;
+       devc->offset[1] = 0x80;
+       devc->gain[0] = 0x80;
+       devc->gain[1] = 0x80;
+       devc->frame_limit = 0;
+       devc->last_step = 0; /* buffersize = 1000 */
+       sdi->priv = devc;
+
+       devices = g_slist_append(devices, sdi);
+
+fail3:
+       ieee1284_release(port);
+fail2:
+       ieee1284_close(port);
+fail1:
+       return devices;
 }
 
 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 {
-       struct drv_context *drvc;
-       GSList *devices;
+       struct parport_list ports;
+       struct sr_config *src;
+       const char *conn = NULL;
+       GSList *devices, *option;
+       gboolean port_found;
+       int i;
+
+
+       for (option = options; option; option = option->next) {
+               src = option->data;
+               if (src->key == SR_CONF_CONN) {
+                       conn = g_variant_get_string(src->data, NULL);
+                       break;
+               }
+       }
 
-       (void)options;
+       if (!conn)
+               return NULL;
+
+       if (ieee1284_find_ports(&ports, 0) != E1284_OK)
+               return NULL;
 
        devices = NULL;
-       drvc = di->context;
-       drvc->instances = NULL;
+       port_found = FALSE;
+       for (i = 0; i < ports.portc; i++)
+               if (!strcmp(ports.portv[i]->name, conn)) {
+                       port_found = TRUE;
+                       devices = scan_port(devices, ports.portv[i]);
+               }
+
+       if (!port_found) {
+               sr_err("Parallel port %s not found. Valid names are:", conn);
+               for (i = 0; i < ports.portc; i++)
+                       sr_err("\t%s", ports.portv[i]->name);
+       }
 
-       /* TODO: scan for devices, either based on a SR_CONF_CONN option
-        * or on a USB scan. */
+       ieee1284_free_ports(&ports);
 
-       return devices;
+       return std_scan_complete(di, devices);
 }
 
-static GSList *dev_list(const struct sr_dev_driver *di)
+static void clear_private(void *priv)
 {
-       return ((struct drv_context *)(di->context))->instances;
+       struct dev_context *devc = priv;
+
+       g_slist_free(devc->enabled_channel);
 }
 
 static int dev_clear(const struct sr_dev_driver *di)
 {
-       return std_dev_clear(di, NULL);
+       struct drv_context *drvc = di->context;
+       struct sr_dev_inst *sdi;
+       GSList *l;
+
+       if (drvc) {
+               for (l = drvc->instances; l; l = l->next) {
+                       sdi = l->data;
+                       ieee1284_unref(sdi->conn);
+               }
+       }
+
+       return std_dev_clear(di, clear_private);
 }
 
 static int dev_open(struct sr_dev_inst *sdi)
 {
-       (void)sdi;
+       struct dev_context *devc = sdi->priv;
+       int i;
+
+       if (ieee1284_open(sdi->conn, 0, &i) != E1284_OK)
+               goto fail1;
+
+       if (ieee1284_claim(sdi->conn) != E1284_OK)
+               goto fail2;
 
-       /* TODO: get handle from sdi->conn and open it. */
+       if (ieee1284_data_dir(sdi->conn, 1) != E1284_OK)
+               goto fail3;
 
-       sdi->status = SR_ST_ACTIVE;
+       if (hung_chang_dso_2100_move_to(sdi, 1))
+               goto fail3;
+
+       devc->samples = g_try_malloc(1000 * sizeof(*devc->samples));
+       if (!devc->samples)
+               goto fail3;
 
        return SR_OK;
+
+fail3:
+       hung_chang_dso_2100_reset_port(sdi->conn);
+       ieee1284_release(sdi->conn);
+fail2:
+       ieee1284_close(sdi->conn);
+fail1:
+       return SR_ERR;
 }
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-       (void)sdi;
+       struct dev_context *devc = sdi->priv;
 
-       /* TODO: get handle from sdi->conn and close it. */
-
-       sdi->status = SR_ST_INACTIVE;
+       g_free(devc->samples);
+       hung_chang_dso_2100_reset_port(sdi->conn);
+       ieee1284_release(sdi->conn);
+       ieee1284_close(sdi->conn);
 
        return SR_OK;
 }
 
-static int cleanup(const struct sr_dev_driver *di)
+static int find_in_array(GVariant *data, const GVariantType *type,
+                        const void *arr, int n)
 {
-       dev_clear(di);
+       const char * const *sarr;
+       const char *s;
+       const uint64_t *u64arr;
+       const uint8_t *u8arr;
+       uint64_t u64;
+       uint8_t u8;
+       int i;
+
+       if (!g_variant_is_of_type(data, type))
+               return -1;
+
+       switch (g_variant_classify(data)) {
+       case G_VARIANT_CLASS_STRING:
+               s = g_variant_get_string(data, NULL);
+               sarr = arr;
+
+               for (i = 0; i < n; i++)
+                       if (!strcmp(s, sarr[i]))
+                               return i;
+               break;
+       case G_VARIANT_CLASS_UINT64:
+               u64 = g_variant_get_uint64(data);
+               u64arr = arr;
+
+               for (i = 0; i < n; i++)
+                       if (u64 == u64arr[i])
+                               return i;
+               break;
+       case G_VARIANT_CLASS_BYTE:
+               u8 = g_variant_get_byte(data);
+               u8arr = arr;
+
+               for (i = 0; i < n; i++)
+                       if (u8 == u8arr[i])
+                               return i;
+       default:
+               break;
+       }
 
-       /* TODO: free other driver resources, if any. */
+       return -1;
+}
 
-       return SR_OK;
+static int reverse_map(uint8_t u, const uint8_t *arr, int n)
+{
+       GVariant *v = g_variant_new_byte(u);
+       int i = find_in_array(v, G_VARIANT_TYPE_BYTE, arr, n);
+       g_variant_unref(v);
+       return i;
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
                const struct sr_channel_group *cg)
 {
-       int ret;
+       struct dev_context *devc = sdi->priv;
+       struct parport *port;
+       int ret, i, ch = -1;
 
-       (void)sdi;
-       (void)data;
-       (void)cg;
+       if (cg) /* sr_config_get will validate cg using config_list */
+               ch = ((struct sr_channel *)cg->channels->data)->index;
 
        ret = SR_OK;
        switch (key) {
-       /* TODO */
+       case SR_CONF_CONN:
+               port = sdi->conn;
+               *data = g_variant_new_string(port->name);
+               break;
+       case SR_CONF_LIMIT_FRAMES:
+               *data = g_variant_new_uint64(devc->frame_limit);
+               break;
+       case SR_CONF_SAMPLERATE:
+               *data = g_variant_new_uint64(samplerates[devc->rate]);
+               break;
+       case SR_CONF_TRIGGER_SOURCE:
+               i = reverse_map(devc->cctl[0] & 0xC0, trigger_sources_map,
+                               ARRAY_SIZE(trigger_sources_map));
+               if (i == -1)
+                       ret = SR_ERR;
+               else
+                       *data = g_variant_new_string(trigger_sources[i]);
+               break;
+       case SR_CONF_TRIGGER_SLOPE:
+               if (devc->edge >= ARRAY_SIZE(trigger_slopes))
+                       ret = SR_ERR;
+               else
+                       *data = g_variant_new_string(trigger_slopes[devc->edge]);
+               break;
+       case SR_CONF_BUFFERSIZE:
+               *data = g_variant_new_uint64(buffersizes[devc->last_step]);
+               break;
+       case SR_CONF_VDIV:
+               if (ch == -1) {
+                       ret = SR_ERR_CHANNEL_GROUP;
+               } else {
+                       i = reverse_map(devc->cctl[ch] & 0x33, vdivs_map,
+                                       ARRAY_SIZE(vdivs_map));
+                       if (i == -1)
+                               ret = SR_ERR;
+                       else
+                               *data = g_variant_new("(tt)", vdivs[i][0],
+                                                     vdivs[i][1]);
+               }
+               break;
+       case SR_CONF_COUPLING:
+               if (ch == -1) {
+                       ret = SR_ERR_CHANNEL_GROUP;
+               } else {
+                       i = reverse_map(devc->cctl[ch] & 0x0C, coupling_map,
+                                       ARRAY_SIZE(coupling_map));
+                       if (i == -1)
+                               ret = SR_ERR;
+                       else
+                               *data = g_variant_new_string(coupling[i]);
+               }
+               break;
+       case SR_CONF_PROBE_FACTOR:
+               if (ch == -1)
+                       ret = SR_ERR_CHANNEL_GROUP;
+               else
+                       *data = g_variant_new_uint64(devc->probe[ch]);
+               break;
        default:
-               return SR_ERR_NA;
+               ret = SR_ERR_NA;
        }
 
        return ret;
@@ -106,17 +418,92 @@ static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *s
 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
                const struct sr_channel_group *cg)
 {
-       int ret;
-
-       (void)data;
-       (void)cg;
+       struct dev_context *devc = sdi->priv;
+       int ret, i, ch = -1;
+       uint64_t u, v;
 
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
+       if (cg) /* sr_config_set will validate cg using config_list */
+               ch = ((struct sr_channel *)cg->channels->data)->index;
 
        ret = SR_OK;
        switch (key) {
-       /* TODO */
+       case SR_CONF_LIMIT_FRAMES:
+               devc->frame_limit = g_variant_get_uint64(data);
+               break;
+       case SR_CONF_SAMPLERATE:
+               i = find_in_array(data, G_VARIANT_TYPE_UINT64,
+                                 samplerates, ARRAY_SIZE(samplerates));
+               if (i == -1)
+                       ret = SR_ERR_ARG;
+               else
+                       devc->rate = i;
+               break;
+       case SR_CONF_TRIGGER_SOURCE:
+               i = find_in_array(data, G_VARIANT_TYPE_STRING,
+                                 trigger_sources, ARRAY_SIZE(trigger_sources));
+               if (i == -1)
+                       ret = SR_ERR_ARG;
+               else
+                       devc->cctl[0] = (devc->cctl[0] & 0x3F)
+                                     | trigger_sources_map[i];
+               break;
+       case SR_CONF_TRIGGER_SLOPE:
+               i = find_in_array(data, G_VARIANT_TYPE_STRING,
+                                 trigger_slopes, ARRAY_SIZE(trigger_slopes));
+               if (i == -1)
+                       ret = SR_ERR_ARG;
+               else
+                       devc->edge = i;
+               break;
+       case SR_CONF_BUFFERSIZE:
+               i = find_in_array(data, G_VARIANT_TYPE_UINT64,
+                                 buffersizes, ARRAY_SIZE(buffersizes));
+               if (i == -1)
+                       ret = SR_ERR_ARG;
+               else
+                       devc->last_step = i;
+               break;
+       case SR_CONF_VDIV:
+               if (ch == -1) {
+                       ret = SR_ERR_CHANNEL_GROUP;
+               } else if (!g_variant_is_of_type(data, G_VARIANT_TYPE("(tt)"))) {
+                       ret = SR_ERR_ARG;
+               } else {
+                       g_variant_get(data, "(tt)", &u, &v);
+                       for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++)
+                               if (vdivs[i][0] == u && vdivs[i][1] == v)
+                                       break;
+                       if (i == ARRAY_SIZE(vdivs))
+                               ret = SR_ERR_ARG;
+                       else
+                               devc->cctl[ch] = (devc->cctl[ch] & 0xCC)
+                                              | vdivs_map[i];
+               }
+               break;
+       case SR_CONF_COUPLING:
+               if (ch == -1) {
+                       ret = SR_ERR_CHANNEL_GROUP;
+               } else {
+                       i = find_in_array(data, G_VARIANT_TYPE_STRING,
+                                         coupling, ARRAY_SIZE(coupling));
+                       if (i == -1)
+                               ret = SR_ERR_ARG;
+                       else
+                               devc->cctl[ch] = (devc->cctl[ch] & 0xF3)
+                                              | coupling_map[i];
+               }
+               break;
+       case SR_CONF_PROBE_FACTOR:
+               if (ch == -1) {
+                       ret = SR_ERR_CHANNEL_GROUP;
+               } else {
+                       u = g_variant_get_uint64(data);
+                       if (!u)
+                               ret = SR_ERR_ARG;
+                       else
+                               devc->probe[ch] = u;
+               }
+               break;
        default:
                ret = SR_ERR_NA;
        }
@@ -124,63 +511,191 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
        return ret;
 }
 
-static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
-               const struct sr_channel_group *cg)
+static int config_channel_set(const struct sr_dev_inst *sdi,
+                             struct sr_channel *ch,
+                             unsigned int changes)
 {
+       struct dev_context *devc = sdi->priv;
+       uint8_t v;
+
+       if (changes & SR_CHANNEL_SET_ENABLED) {
+               if (ch->enabled) {
+                       v = devc->channel | (1 << ch->index);
+                       if (v & (v - 1))
+                               return SR_ERR;
+                       devc->channel = v;
+                       devc->enabled_channel->data = ch;
+               } else {
+                       devc->channel &= ~(1 << ch->index);
+               }
+       }
+       return SR_OK;
+}
+
+static int config_commit(const struct sr_dev_inst *sdi)
+{
+       uint8_t state = hung_chang_dso_2100_read_mbox(sdi->conn, 0.02);
        int ret;
 
-       (void)sdi;
-       (void)data;
-       (void)cg;
+       switch (state) {
+       case 0x03:
+       case 0x14:
+       case 0x21:
+               /* we will travel the complete config path on our way to state 1 */
+               break;
+       case 0x00:
+               state = 0x01;
+               /* Fallthrough */
+       default:
+               ret = hung_chang_dso_2100_move_to(sdi, 1);
+               if (ret != SR_OK)
+                       return ret;
+               /* Fallthrough */
+       case 0x01:
+               hung_chang_dso_2100_write_mbox(sdi->conn, 4);
+       }
+       ret = hung_chang_dso_2100_move_to(sdi, 1);
+       if (ret != SR_OK)
+               return ret;
+       return hung_chang_dso_2100_move_to(sdi, state);
+}
+
+static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
+               const struct sr_channel_group *cg)
+{
+       GVariantBuilder gvb;
+       GVariant *gvar, *rational[2];
+       GSList *l;
+       int i;
 
-       ret = SR_OK;
        switch (key) {
-       /* TODO */
+               case SR_CONF_SCAN_OPTIONS:
+       case SR_CONF_DEVICE_OPTIONS:
+               break;
+       case SR_CONF_SAMPLERATE:
+       case SR_CONF_TRIGGER_SOURCE:
+       case SR_CONF_TRIGGER_SLOPE:
+       case SR_CONF_BUFFERSIZE:
+               if (!sdi || cg)
+                       return SR_ERR_NA;
+               break;
+       case SR_CONF_VDIV:
+       case SR_CONF_COUPLING:
+               if (!sdi)
+                       return SR_ERR_NA;
+               if (!cg)
+                       return SR_ERR_CHANNEL_GROUP;
+               l = g_slist_find(sdi->channel_groups, cg);
+               if (!l)
+                       return SR_ERR_ARG;
+               break;
        default:
                return SR_ERR_NA;
        }
 
-       return ret;
+       switch (key) {
+       case SR_CONF_SCAN_OPTIONS:
+               *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+                               scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
+               break;
+       case SR_CONF_DEVICE_OPTIONS:
+               if (!sdi)
+                       *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+                                       drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
+               else if (!cg)
+                       *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+                                       devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
+               else
+                       *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+                                       cgopts, ARRAY_SIZE(cgopts), sizeof(uint32_t));
+               break;
+       case SR_CONF_SAMPLERATE:
+               g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+               gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
+                               samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
+               g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
+               *data = g_variant_builder_end(&gvb);
+               break;
+       case SR_CONF_TRIGGER_SOURCE:
+               *data = g_variant_new_strv(trigger_sources, ARRAY_SIZE(trigger_sources));
+               break;
+       case SR_CONF_TRIGGER_SLOPE:
+               *data = g_variant_new_strv(trigger_slopes, ARRAY_SIZE(trigger_slopes));
+               break;
+       case SR_CONF_BUFFERSIZE:
+               *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
+                               buffersizes, ARRAY_SIZE(buffersizes), sizeof(uint64_t));
+               break;
+       case SR_CONF_VDIV:
+               g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
+               for (i = 0; i < (int)ARRAY_SIZE(vdivs); i++) {
+                       rational[0] = g_variant_new_uint64(vdivs[i][0]);
+                       rational[1] = g_variant_new_uint64(vdivs[i][1]);
+                       gvar = g_variant_new_tuple(rational, 2);
+                       g_variant_builder_add_value(&gvb, gvar);
+               }
+               *data = g_variant_builder_end(&gvb);
+               break;
+       case SR_CONF_COUPLING:
+               *data = g_variant_new_strv(coupling, ARRAY_SIZE(coupling));
+               break;
+       }
+
+       return SR_OK;
 }
 
-static int dev_acquisition_start(const struct sr_dev_inst *sdi,
-               void *cb_data)
+static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 {
-       (void)sdi;
-       (void)cb_data;
+       struct dev_context *devc = sdi->priv;
+       int ret;
 
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
+       if (devc->channel) {
+               static const float res_array[] = {0.5, 1, 2, 5};
+               static const uint8_t relays[] = {100, 10, 10, 1};
+               devc->factor = devc->probe[devc->channel - 1] / 32.0;
+               devc->factor *= res_array[devc->cctl[devc->channel - 1] & 0x03];
+               devc->factor /= relays[(devc->cctl[devc->channel - 1] >> 4) & 0x03];
+       }
+       devc->frame = 0;
+       devc->state_known = TRUE;
+       devc->step = 0;
+       devc->adc2 = FALSE;
+       devc->retries = MAX_RETRIES;
+
+       ret = hung_chang_dso_2100_move_to(sdi, 0x21);
+       if (ret != SR_OK)
+               return ret;
+
+       std_session_send_df_header(sdi);
 
-       /* TODO: configure hardware, reset acquisition state, set up
-        * callbacks and send header packet. */
+       sr_session_source_add(sdi->session, -1, 0, 8,
+                             hung_chang_dso_2100_poll, (void *)sdi);
 
        return SR_OK;
 }
 
-static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 {
-       (void)cb_data;
-
-       if (sdi->status != SR_ST_ACTIVE)
-               return SR_ERR_DEV_CLOSED;
-
-       /* TODO: stop acquisition. */
+       std_session_send_df_end(sdi);
+       sr_session_source_remove(sdi->session, -1);
+       hung_chang_dso_2100_move_to(sdi, 1);
 
        return SR_OK;
 }
 
-SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info = {
+static struct sr_dev_driver hung_chang_dso_2100_driver_info = {
        .name = "hung-chang-dso-2100",
        .longname = "Hung-Chang DSO-2100",
        .api_version = 1,
-       .init = init,
-       .cleanup = cleanup,
+       .init = std_init,
+       .cleanup = std_cleanup,
        .scan = scan,
-       .dev_list = dev_list,
+       .dev_list = std_dev_list,
        .dev_clear = dev_clear,
        .config_get = config_get,
        .config_set = config_set,
+       .config_channel_set = config_channel_set,
+       .config_commit = config_commit,
        .config_list = config_list,
        .dev_open = dev_open,
        .dev_close = dev_close,
@@ -188,3 +703,4 @@ SR_PRIV struct sr_dev_driver hung_chang_dso_2100_driver_info = {
        .dev_acquisition_stop = dev_acquisition_stop,
        .context = NULL,
 };
+SR_REGISTER_DEV_DRIVER(hung_chang_dso_2100_driver_info);