X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Funi-t-ut32x%2Fprotocol.c;h=6e04dd9b9038731f0e26b0f1d608f1912abff3f9;hb=HEAD;hp=95323a67f8c77e9a16008c6d59188fc7213a220e;hpb=ba7dd8bbb8168cba432a844259a3e239aa5f36d7;p=libsigrok.git diff --git a/hardware/uni-t-ut32x/protocol.c b/hardware/uni-t-ut32x/protocol.c deleted file mode 100644 index 95323a67..00000000 --- a/hardware/uni-t-ut32x/protocol.c +++ /dev/null @@ -1,239 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2013 Bert Vermeulen - * - * 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 . - */ - -#include "protocol.h" - -#include -#include - -extern struct sr_dev_driver uni_t_ut32x_driver_info; -static struct sr_dev_driver *di = &uni_t_ut32x_driver_info; - -static float parse_temperature(unsigned char *buf) -{ - float temp; - int i; - gboolean negative; - - negative = FALSE; - temp = 0.0; - for (i = 0; i < 4; i++) { - if (buf[i] == 0x3a) - continue; - if (buf[i] == 0x3b) { - if (negative) { - sr_dbg("Double negative sign!"); - return NAN; - } else { - negative = TRUE; - continue; - } - } - if (buf[i] < 0x30 || buf[i] > 0x39) { - sr_dbg("Invalid digit '%.2x'!", buf[i]); - return NAN; - } - temp *= 10; - temp += (buf[i] - 0x30); - } - temp /= 10; - if (negative) - temp = -temp; - - return temp; -} - -static void process_packet(struct sr_dev_inst *sdi) -{ - struct dev_context *devc; - struct sr_datafeed_packet packet; - struct sr_datafeed_analog analog; - GString *spew; - float temp; - int i; - gboolean is_valid; - - devc = sdi->priv; - sr_dbg("Received full 19-byte packet."); - if (sr_log_loglevel_get() >= SR_LOG_SPEW) { - spew = g_string_sized_new(60); - for (i = 0; i < devc->packet_len; i++) - g_string_append_printf(spew, "%.2x ", devc->packet[i]); - sr_spew("%s", spew->str); - g_string_free(spew, TRUE); - } - - is_valid = TRUE; - if (devc->packet[1] == 0x3b && devc->packet[2] == 0x3b - && devc->packet[3] == 0x3b && devc->packet[4] == 0x3b) - /* No measurement: missing channel, empty storage location, ... */ - is_valid = FALSE; - - temp = parse_temperature(devc->packet + 1); - if (isnan(temp)) - is_valid = FALSE; - - if (is_valid) { - memset(&analog, 0, sizeof(struct sr_datafeed_analog)); - analog.mq = SR_MQ_TEMPERATURE; - analog.mqflags = 0; - switch (devc->packet[5] - 0x30) { - case 1: - analog.unit = SR_UNIT_CELSIUS; - break; - case 2: - analog.unit = SR_UNIT_FAHRENHEIT; - break; - case 3: - analog.unit = SR_UNIT_KELVIN; - break; - default: - /* We can still pass on the measurement, whatever it is. */ - sr_dbg("Unknown unit 0x%.2x.", devc->packet[5]); - } - switch (devc->packet[13] - 0x30) { - case 0: - /* Channel T1. */ - analog.channels = g_slist_append(NULL, g_slist_nth_data(sdi->channels, 0)); - break; - case 1: - /* Channel T2. */ - analog.channels = g_slist_append(NULL, g_slist_nth_data(sdi->channels, 1)); - break; - case 2: - case 3: - /* Channel T1-T2. */ - analog.channels = g_slist_append(NULL, g_slist_nth_data(sdi->channels, 2)); - analog.mqflags |= SR_MQFLAG_RELATIVE; - break; - default: - sr_err("Unknown channel 0x%.2x.", devc->packet[13]); - is_valid = FALSE; - } - if (is_valid) { - analog.num_samples = 1; - analog.data = &temp; - packet.type = SR_DF_ANALOG; - packet.payload = &analog; - sr_session_send(devc->cb_data, &packet); - g_slist_free(analog.channels); - } - } - - /* We count packets even if the temperature was invalid. This way - * a sample limit on "Memory" data source still works: unused - * memory slots come through as "----" measurements. */ - 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); - } - -} - -SR_PRIV void uni_t_ut32x_receive_transfer(struct libusb_transfer *transfer) -{ - struct dev_context *devc; - struct sr_dev_inst *sdi; - int hid_payload_len, ret; - - sdi = transfer->user_data; - devc = sdi->priv; - if (transfer->actual_length == 8) { - /* CH9325 encodes length in low nibble of first byte, with - * bytes 1-7 being the (padded) payload. */ - hid_payload_len = transfer->buffer[0] & 0x0f; - memcpy(devc->packet + devc->packet_len, transfer->buffer + 1, - hid_payload_len); - devc->packet_len += hid_payload_len; - if (devc->packet_len >= 2 - && devc->packet[devc->packet_len - 2] == 0x0d - && devc->packet[devc->packet_len - 1] == 0x0a) { - /* Got end of packet, but do we have a complete packet? */ - if (devc->packet_len == 19) - process_packet(sdi); - /* Either way, done with it. */ - devc->packet_len = 0; - } else if (devc->packet_len > 19) { - /* Guard against garbage from the device overrunning - * our packet buffer. */ - sr_dbg("Buffer overrun!"); - devc->packet_len = 0; - } - } - - /* Get the next transfer (unless we're shutting down). */ - if (sdi->status != SR_ST_STOPPING) { - if ((ret = libusb_submit_transfer(devc->xfer)) != 0) { - sr_dbg("Failed to resubmit transfer: %s", libusb_error_name(ret)); - sdi->status = SR_ST_STOPPING; - libusb_free_transfer(devc->xfer); - } - } else - libusb_free_transfer(devc->xfer); - -} - -SR_PRIV int uni_t_ut32x_handle_events(int fd, int revents, void *cb_data) -{ - struct drv_context *drvc; - struct dev_context *devc; - struct sr_dev_inst *sdi; - struct sr_datafeed_packet packet; - struct sr_usb_dev_inst *usb; - struct timeval tv; - int len, ret; - unsigned char cmd[2]; - - (void)fd; - (void)revents; - drvc = di->priv; - - if (!(sdi = cb_data)) - return TRUE; - - if (!(devc = sdi->priv)) - return TRUE; - - memset(&tv, 0, sizeof(struct timeval)); - libusb_handle_events_timeout_completed(drvc->sr_ctx->libusb_ctx, &tv, - NULL); - - if (sdi->status == SR_ST_STOPPING) { - usb_source_remove(drvc->sr_ctx); - packet.type = SR_DF_END; - sr_session_send(cb_data, &packet); - - /* Tell the device to stop sending USB packets. */ - usb = sdi->conn; - cmd[0] = 0x01; - cmd[1] = CMD_STOP; - ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5); - if (ret != 0 || len != 2) { - /* Warning only, doesn't matter. */ - sr_dbg("Failed to send stop command: %s", libusb_error_name(ret)); - } - - sdi->status = SR_ST_ACTIVE; - return TRUE; - } - - return TRUE; -} -