From: Bert Vermeulen Date: Tue, 16 Jul 2013 13:58:11 +0000 (+0200) Subject: kecheng-kc-330b: Acquisition from stored logs X-Git-Tag: libsigrok-0.2.1~28 X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=85ed4ab3bae4e5a6fbc741c4c8f8e2d9923e9594;p=libsigrok.git kecheng-kc-330b: Acquisition from stored logs --- diff --git a/hardware/kecheng-kc-330b/api.c b/hardware/kecheng-kc-330b/api.c index 66984e9a..ded6357e 100644 --- a/hardware/kecheng-kc-330b/api.c +++ b/hardware/kecheng-kc-330b/api.c @@ -103,7 +103,6 @@ static int scan_kecheng(struct sr_usb_dev_inst *usb, char **model) buf[buf[1] + 2] = '\x0'; *model = g_strndup((const gchar *)buf + 2, 30); - //g_strstrip(*model); return SR_OK; } @@ -153,6 +152,7 @@ static GSList *scan(GSList *options) devc->alarm_high = DEFAULT_ALARM_HIGH; devc->mqflags = DEFAULT_WEIGHT_TIME | DEFAULT_WEIGHT_FREQ; devc->data_source = DEFAULT_DATA_SOURCE; + devc->config_dirty = FALSE; /* TODO: Set date/time? */ @@ -196,20 +196,23 @@ static int dev_open(struct sr_dev_inst *sdi) if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK) return SR_ERR; + if ((ret = libusb_set_configuration(usb->devhdl, 1))) { + sr_err("Failed to set configuration: %s.", libusb_error_name(ret)); + return SR_ERR; + } + if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) { sr_err("Failed to claim interface: %s.", libusb_error_name(ret)); return SR_ERR; } sdi->status = SR_ST_ACTIVE; - /* Force configuration. */ - ret = kecheng_kc_330b_configure(sdi); - return ret; } static int dev_close(struct sr_dev_inst *sdi) { + struct dev_context *devc; struct sr_usb_dev_inst *usb; if (!di->priv) { @@ -223,6 +226,12 @@ static int dev_close(struct sr_dev_inst *sdi) /* Nothing to do. */ return SR_OK; + /* This allows a frontend to configure the device without ever + * doing an acquisition step. */ + devc = sdi->priv; + if (!devc->config_dirty) + kecheng_kc_330b_configure(sdi); + libusb_release_interface(usb->devhdl, USB_INTERFACE); libusb_close(usb->devhdl); usb->devhdl = NULL; @@ -266,10 +275,8 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi) *data = g_variant_new_tuple(rational, 2); break; case SR_CONF_DATALOG: - if ((ret = kecheng_kc_330b_recording_get(sdi, &tmp)) == SR_OK) - *data = g_variant_new_boolean(tmp); - else - return SR_ERR; + /* There really isn't a way to be sure the device is logging. */ + return SR_ERR_NA; break; case SR_CONF_SPL_WEIGHT_FREQ: if (devc->mqflags & SR_MQFLAG_SPL_FREQ_WEIGHT_A) @@ -326,7 +333,7 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) if (kecheng_kc_330b_sample_intervals[i][0] != p || kecheng_kc_330b_sample_intervals[i][1] != q) continue; devc->sample_interval = i; - kecheng_kc_330b_configure(sdi); + devc->config_dirty = TRUE; break; } if (i == ARRAY_SIZE(kecheng_kc_330b_sample_intervals)) @@ -342,7 +349,7 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) return SR_ERR_ARG; devc->mqflags &= ~(SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C); devc->mqflags |= tmp; - kecheng_kc_330b_configure(sdi); + devc->config_dirty = TRUE; break; case SR_CONF_SPL_WEIGHT_TIME: tmp_str = g_variant_get_string(data, NULL); @@ -354,7 +361,7 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) return SR_ERR_ARG; devc->mqflags &= ~(SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S); devc->mqflags |= tmp; - kecheng_kc_330b_configure(sdi); + devc->config_dirty = TRUE; break; case SR_CONF_DATA_SOURCE: tmp_str = g_variant_get_string(data, NULL); @@ -364,6 +371,7 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi) devc->data_source = DATA_SOURCE_MEMORY; else return SR_ERR; + devc->config_dirty = TRUE; break; default: ret = SR_ERR_NA; @@ -412,14 +420,19 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi) } static int dev_acquisition_start(const struct sr_dev_inst *sdi, - void *cb_data) + void *cb_data) { struct drv_context *drvc; struct dev_context *devc; + struct sr_datafeed_packet packet; + struct sr_datafeed_meta meta; + struct sr_config *src; struct sr_usb_dev_inst *usb; + GVariant *gvar, *rational[2]; const struct libusb_pollfd **pfd; - int len, ret, i; - unsigned char cmd; + const uint64_t *si; + int stored_mqflags, req_len, buf_len, len, ret, i; + unsigned char buf[9]; if (sdi->status != SR_ST_ACTIVE) return SR_ERR_DEV_CLOSED; @@ -431,10 +444,15 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, devc->cb_data = cb_data; devc->num_samples = 0; + /* Send header packet to the session bus. */ + std_session_send_df_header(cb_data, LOG_PREFIX); + if (devc->data_source == DATA_SOURCE_LIVE) { + /* Force configuration. */ + kecheng_kc_330b_configure(sdi); + if (kecheng_kc_330b_status_get(sdi, &ret) != SR_OK) return SR_ERR; - sr_dbg("st %s", ret == DEVICE_ACTIVE ? "act" : "deact"); if (ret != DEVICE_ACTIVE) { sr_err("Device is inactive"); /* Still continue though, since the device will @@ -442,14 +460,37 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, * on the device -- and then start feeding good * samples back. */ } + } else { + if (kecheng_kc_330b_log_info_get(sdi, buf) != SR_OK) + return SR_ERR; + stored_mqflags = buf[4] ? SR_MQFLAG_SPL_TIME_WEIGHT_S : SR_MQFLAG_SPL_TIME_WEIGHT_F; + stored_mqflags |= buf[5] ? SR_MQFLAG_SPL_FREQ_WEIGHT_C : SR_MQFLAG_SPL_FREQ_WEIGHT_A; + devc->stored_samples = (buf[7] << 8) | buf[8]; + if (devc->stored_samples == 0) { + /* Notify frontend of empty log by sending start/end packets. */ + packet.type = SR_DF_END; + sr_session_send(cb_data, &packet); + return SR_OK; + } + + if (devc->limit_samples && devc->limit_samples < devc->stored_samples) + devc->stored_samples = devc->limit_samples; + + si = kecheng_kc_330b_sample_intervals[buf[1]]; + rational[0] = g_variant_new_uint64(si[0]); + rational[1] = g_variant_new_uint64(si[1]); + gvar = g_variant_new_tuple(rational, 2); + src = sr_config_new(SR_CONF_SAMPLE_INTERVAL, gvar); + packet.type = SR_DF_META; + packet.payload = &meta; + meta.config = g_slist_append(NULL, src); + sr_session_send(devc->cb_data, &packet); + g_free(src); } if (!(devc->xfer = libusb_alloc_transfer(0))) return SR_ERR; - /* Send header packet to the session bus. */ - std_session_send_df_header(cb_data, LOG_PREFIX); - pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx); for (i = 0; pfd[i]; i++) { /* Handle USB events every 10ms. */ @@ -460,28 +501,47 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, } devc->usbfd[i] = -1; - cmd = CMD_GET_LIVE_SPL; - ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5); + if (devc->data_source == DATA_SOURCE_LIVE) { + buf[0] = CMD_GET_LIVE_SPL; + buf_len = 1; + devc->state = LIVE_SPL_WAIT; + devc->last_live_request = g_get_monotonic_time() / 1000; + req_len = 3; + } else { + buf[0] = CMD_GET_LOG_DATA; + buf[1] = 0; + buf[2] = 0; + buf_len = 4; + devc->state = LOG_DATA_WAIT; + if (devc->stored_samples < 63) + buf[3] = devc->stored_samples; + else + buf[3] = 63; + /* Command ack byte + 2 bytes per sample. */ + req_len = 1 + buf[3] * 2; + } + + ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, buf_len, &len, 5); if (ret != 0 || len != 1) { sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret)); libusb_free_transfer(devc->xfer); return SR_ERR; } - devc->last_live_request = g_get_monotonic_time() / 1000; libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf, - 16, kecheng_kc_330b_receive_transfer, (void *)sdi, 15); + req_len, kecheng_kc_330b_receive_transfer, (void *)sdi, 15); if (libusb_submit_transfer(devc->xfer) != 0) { libusb_free_transfer(devc->xfer); return SR_ERR; } - devc->state = LIVE_SPL_WAIT; return SR_OK; } static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) { + struct dev_context *devc; + (void)cb_data; if (sdi->status != SR_ST_ACTIVE) @@ -490,6 +550,17 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data) /* Signal USB transfer handler to clean up and stop. */ sdi->status = SR_ST_STOPPING; + devc = sdi->priv; + if (devc->data_source == DATA_SOURCE_MEMORY && devc->config_dirty) { + /* The protocol doesn't have a command to clear stored data; + * it clears it whenever new configuration is set. That means + * we can't just configure the device any time we want when + * it's in DATA_SOURCE_MEMORY mode. The only safe time to do + * it is now, when we're sure we've pulled in all the stored + * data. */ + kecheng_kc_330b_configure(sdi); + } + return SR_OK; } diff --git a/hardware/kecheng-kc-330b/protocol.c b/hardware/kecheng-kc-330b/protocol.c index 9eca15c0..99936c6c 100644 --- a/hardware/kecheng-kc-330b/protocol.c +++ b/hardware/kecheng-kc-330b/protocol.c @@ -34,8 +34,8 @@ SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data) struct timeval tv; const uint64_t *intv_entry; gint64 now, interval; - int len, ret, i; - unsigned char cmd; + int offset, len, ret, i; + unsigned char buf[4]; (void)fd; (void)revents; @@ -60,12 +60,13 @@ SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data) } if (devc->state == LIVE_SPL_IDLE) { + /* Request samples at the interval rate. */ now = g_get_monotonic_time() / 1000; intv_entry = kecheng_kc_330b_sample_intervals[devc->sample_interval]; interval = intv_entry[0] * 1000 / intv_entry[1]; if (now - devc->last_live_request > interval) { - cmd = CMD_GET_LIVE_SPL; - ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, &cmd, 1, &len, 5); + buf[0] = CMD_GET_LIVE_SPL; + ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5); if (ret != 0 || len != 1) { sr_dbg("Failed to request new acquisition: %s", libusb_error_name(ret)); @@ -77,6 +78,26 @@ SR_PRIV int kecheng_kc_330b_handle_events(int fd, int revents, void *cb_data) devc->last_live_request = now; devc->state = LIVE_SPL_WAIT; } + } else if (devc->state == LIVE_SPL_IDLE) { + buf[0] = CMD_GET_LOG_DATA; + offset = devc->num_samples / 63; + buf[1] = (offset >> 8) & 0xff; + buf[2] = offset & 0xff; + if (devc->stored_samples - devc->num_samples > 63) + buf[3] = 63; + else + /* Last chunk. */ + buf[3] = devc->stored_samples - devc->num_samples; + ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 4, &len, 5); + if (ret != 0 || len != 4) { + sr_dbg("Failed to request next chunk: %s", + libusb_error_name(ret)); + sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi, + devc->cb_data); + return TRUE; + } + libusb_submit_transfer(devc->xfer); + devc->state = LIVE_SPL_WAIT; } return TRUE; @@ -107,8 +128,8 @@ SR_PRIV void kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer) { struct dev_context *devc; struct sr_dev_inst *sdi; - float fvalue; - int packet_has_error; + float fvalue[64]; + int packet_has_error, num_samples, i; sdi = transfer->user_data; devc = sdi->priv; @@ -128,26 +149,48 @@ SR_PRIV void kecheng_kc_330b_receive_transfer(struct libusb_transfer *transfer) break; } - if (!packet_has_error) { - if (devc->state == LIVE_SPL_WAIT) { - if (transfer->actual_length != 3 || transfer->buffer[0] != 0x88) { - sr_dbg("Received invalid SPL packet."); - } else { - fvalue = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0; - send_data(sdi, &fvalue, 1); - devc->num_samples++; - if (devc->limit_samples && devc->num_samples >= devc->limit_samples) - sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi, - devc->cb_data); + if (packet_has_error) + return; + if (devc->state == LIVE_SPL_WAIT) { + if (transfer->actual_length != 3 || transfer->buffer[0] != 0x88) { + sr_dbg("Received invalid SPL packet."); + } else { + fvalue[0] = ((transfer->buffer[1] << 8) + transfer->buffer[2]) / 10.0; + send_data(sdi, fvalue, 1); + devc->num_samples++; + if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { + sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi, + devc->cb_data); + } else { /* let USB event handler fire off another * request when the time is right. */ devc->state = LIVE_SPL_IDLE; } } + } else if (devc->state == LOG_DATA_WAIT) { + if (transfer->actual_length < 1 || !(transfer->actual_length & 0x01)) { + sr_dbg("Received invalid stored SPL packet."); + } else { + num_samples = (transfer->actual_length - 1) / 2; + for (i = 0; i < num_samples; i++) { + fvalue[i] = transfer->buffer[1 + i * 2] << 8; + fvalue[i] += transfer->buffer[1 + i * 2 + 1]; + fvalue[i] /= 10.0; + } + send_data(sdi, fvalue, 1); + devc->num_samples += num_samples; + if (devc->num_samples >= devc->stored_samples) { + sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi, + devc->cb_data); + } else { + /* let USB event handler fire off another + * request when the time is right. */ + devc->state = LOG_DATA_IDLE; + } + } } - } SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi) @@ -186,6 +229,8 @@ SR_PRIV int kecheng_kc_330b_configure(const struct sr_dev_inst *sdi) return SR_ERR; } + devc->config_dirty = FALSE; + return SR_OK; } @@ -264,7 +309,36 @@ SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi, return SR_OK; } -SR_PRIV int kecheng_kc_330b_recording_get(const struct sr_dev_inst *sdi, +SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi, + unsigned char *buf) +{ + struct sr_usb_dev_inst *usb; + int len, ret; + + sr_dbg("Getting logging info."); + + usb = sdi->conn; + buf[0] = CMD_GET_LOG_INFO; + ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, buf, 1, &len, 5); + if (ret != 0 || len != 1) { + sr_dbg("Failed to get status: %s", libusb_error_name(ret)); + return SR_ERR; + } + + ret = libusb_bulk_transfer(usb->devhdl, EP_IN, buf, 9, &len, 10); + if (ret != 0 || len != 9) { + sr_dbg("Failed to get status (no ack): %s", libusb_error_name(ret)); + return SR_ERR; + } + if (buf[0] != (CMD_GET_LOG_INFO | 0x80) || buf[1] > 6) { + sr_dbg("Failed to get log info: invalid response 0x%2.x", buf[0]); + return SR_ERR; + } + + return SR_OK; +} + +SR_PRIV int kecheng_kc_330b_log_date_time_get(const struct sr_dev_inst *sdi, gboolean *tmp) { diff --git a/hardware/kecheng-kc-330b/protocol.h b/hardware/kecheng-kc-330b/protocol.h index f872676e..6bf86efb 100644 --- a/hardware/kecheng-kc-330b/protocol.h +++ b/hardware/kecheng-kc-330b/protocol.h @@ -49,6 +49,8 @@ enum { LIVE_SPL_IDLE, LIVE_SPL_WAIT, + LOG_DATA_IDLE, + LOG_DATA_WAIT, }; enum { @@ -56,6 +58,8 @@ enum { CMD_IDENTIFY = 0x02, CMD_SET_DATE_TIME = 0x03, CMD_GET_STATUS = 0x04, + CMD_GET_LOG_INFO = 0x05, + CMD_GET_LOG_DATA = 0x07, CMD_GET_LIVE_SPL = 0x08, }; @@ -81,11 +85,13 @@ struct dev_context { /* Operational state */ int state; + gboolean config_dirty; uint64_t num_samples; + uint64_t stored_samples; void *cb_data; int usbfd[10]; struct libusb_transfer *xfer; - unsigned char buf[16]; + unsigned char buf[128]; /* Temporary state across callbacks */ gint64 last_live_request; @@ -100,5 +106,7 @@ SR_PRIV int kecheng_kc_330b_recording_get(const struct sr_dev_inst *sdi, gboolean *tmp); SR_PRIV int kecheng_kc_330b_status_get(const struct sr_dev_inst *sdi, int *status); +SR_PRIV int kecheng_kc_330b_log_info_get(const struct sr_dev_inst *sdi, + unsigned char *buf); #endif