+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <string.h>
-#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-/*
- * Driver for various UNI-T multimeters (and rebranded ones).
- *
- * Most UNI-T DMMs can be used with two (three) different PC interface cables:
- * - The UT-D04 USB/HID cable, old version with Hoitek HE2325U chip.
- * - The UT-D04 USB/HID cable, new version with WCH CH9325 chip.
- * - The UT-D01 RS232 cable.
- *
- * This driver is meant to support all three cables, and various DMMs that
- * can be attached to a PC via these cables. Currently only the UT-D04 cable
- * (new version) is supported.
- *
- * The data for one DMM packet (e.g. 14 bytes if the respective DMM uses a
- * Fortune Semiconductor FS9922-DMM4 chip) is spread across multiple
- * 8-byte chunks.
- *
- * An 8-byte chunk looks like this:
- * - Byte 0: 0xfz, where z is the number of actual data bytes in this chunk.
- * - Bytes 1-7: z data bytes, the rest of the bytes should be ignored.
- *
- * Example:
- * f0 00 00 00 00 00 00 00 (no data bytes)
- * f2 55 77 00 00 00 00 00 (2 data bytes, 0x55 and 0x77)
- * f1 d1 00 00 00 00 00 00 (1 data byte, 0xd1)
- *
- * Chips and serial settings used in UNI-T DMMs (and rebranded ones):
- * - UNI-T UT108: ?
- * - UNI-T UT109: ?
- * - UNI-T UT30A: ?
- * - UNI-T UT30E: ?
- * - UNI-T UT60E: Fortune Semiconductor FS9721_LP3
- * - UNI-T UT60G: ?
- * - UNI-T UT61B: ?
- * - UNI-T UT61C: ?
- * - UNI-T UT61D: Fortune Semiconductor FS9922-DMM4
- * - UNI-T UT61E: Cyrustek ES51922
- * - UNI-T UT70B: ?
- * - Voltcraft VC-820: Fortune Semiconductor FS9721_LP3
- * - Voltcraft VC-840: Fortune Semiconductor FS9721_LP3
- * - ...
- */
-
-static void decode_packet(struct dev_context *devc, const uint8_t *buf)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- float floatval;
- int ret;
-
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
-
- /* Parse the protocol packet. */
- if ((ret = sr_dmm_parse_fs9922(buf, &floatval, &analog)) != SR_OK) {
- // if ((ret = sr_dmm_parse_fs9721(buf, &floatval, &analog)) != SR_OK) {
- sr_err("Invalid DMM packet, ignoring.");
- return;
- }
-
- /* Send a sample packet with one analog value. */
- analog.num_samples = 1;
- analog.data = &floatval;
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(devc->cb_data, &packet);
-
- /* Increase sample count. */
- devc->num_samples++;
-}
-
-static int hid_chip_init(struct dev_context *devc, uint16_t baudrate)
-{
- int ret;
- uint8_t buf[5];
-
- /* Detach kernel drivers which grabbed this device (if any). */
- if (libusb_kernel_driver_active(devc->usb->devhdl, 0) == 1) {
- ret = libusb_detach_kernel_driver(devc->usb->devhdl, 0);
- if (ret < 0) {
- sr_err("Failed to detach kernel driver: %d.", ret);
- return SR_ERR;
- }
- sr_dbg("Successfully detached kernel driver.");
- } else {
- sr_dbg("No need to detach a kernel driver.");
- }
-
- /* Claim interface 0. */
- if ((ret = libusb_claim_interface(devc->usb->devhdl, 0)) < 0) {
- sr_err("Failed to claim interface 0: %d.", ret);
- return SR_ERR;
- }
- sr_dbg("Successfully claimed interface 0.");
-
- /* Baudrate example: 19230 baud -> HEX(19230) == 0x4b1e */
- buf[0] = baudrate & 0xff; /* Baudrate, LSB */
- buf[1] = (baudrate >> 8) & 0xff; /* Baudrate, MSB */
- buf[2] = 0x00; /* Unknown/unused (?) */
- buf[3] = 0x00; /* Unknown/unused (?) */
- buf[4] = 0x03; /* Unknown, always 0x03. */
-
- /* Send HID feature report to setup the baudrate/chip. */
- sr_dbg("Sending initial HID feature report.");
- sr_spew("HID init = 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x (%d baud)",
- buf[0], buf[1], buf[2], buf[3], buf[4], baudrate);
- ret = libusb_control_transfer(
- devc->usb->devhdl, /* libusb device handle */
- LIBUSB_REQUEST_TYPE_CLASS |
- LIBUSB_RECIPIENT_INTERFACE |
- LIBUSB_ENDPOINT_OUT,
- 9, /* bRequest: HID set_report */
- 0x300, /* wValue: HID feature, report number 0 */
- 0, /* wIndex: interface 0 */
- (unsigned char *)&buf, /* payload buffer */
- 5, /* wLength: 5 bytes payload */
- 1000 /* timeout (ms) */);
-
- if (ret < 0) {
- sr_err("HID feature report error: %d.", ret);
- return SR_ERR;
- }
-
- if (ret != 5) {
- /* TODO: Handle better by also sending the remaining bytes. */
- sr_err("Short packet: sent %d/5 bytes.", ret);
- return SR_ERR;
- }
-
- sr_dbg("Successfully sent initial HID feature report.");
-
- return SR_OK;
-}
-
-static void log_8byte_chunk(const uint8_t *buf)
-{
- sr_spew("8-byte chunk: %02x %02x %02x %02x %02x %02x %02x %02x "
- "(%d data bytes)", buf[0], buf[1], buf[2], buf[3],
- buf[4], buf[5], buf[6], buf[7], (buf[0] & 0x0f));
-}
-
-static void log_dmm_packet(const uint8_t *buf)
-{
- sr_dbg("DMM packet: %02x %02x %02x %02x %02x %02x %02x"
- " %02x %02x %02x %02x %02x %02x %02x",
- buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
- buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
-}
-
-SR_PRIV int uni_t_dmm_receive_data(int fd, int revents, void *cb_data)
-{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- int i, ret, len, num_databytes_in_chunk;
- uint8_t buf[CHUNK_SIZE];
- uint8_t *pbuf;
- static gboolean first_run = TRUE, synced_on_first_packet = FALSE;
- static uint64_t data_byte_counter = 0;
-
- (void)fd;
- (void)revents;
-
- sdi = cb_data;
- devc = sdi->priv;
-
- pbuf = devc->protocol_buf;
-
- /* On the first run, we need to init the HID chip. */
- if (first_run) {
- /* TODO: The baudrate is DMM-specific (UT61D: 19230). */
- if ((ret = hid_chip_init(devc, 19230)) != SR_OK) {
- sr_err("HID chip init failed: %d.", ret);
- return FALSE;
- }
- memset(pbuf, 0x00, NUM_DATA_BYTES);
- first_run = FALSE;
- }
-
- memset(&buf, 0x00, CHUNK_SIZE);
-
- /* Get data from EP2 using an interrupt transfer. */
- ret = libusb_interrupt_transfer(
- devc->usb->devhdl, /* libusb device handle */
- LIBUSB_ENDPOINT_IN | 2, /* EP2, IN */
- (unsigned char *)&buf, /* receive buffer */
- CHUNK_SIZE, /* wLength */
- &len, /* actually received byte count */
- 1000 /* timeout (ms) */);
-
- if (ret < 0) {
- sr_err("USB receive error: %d.", ret);
- return FALSE;
- }
-
- if (len != CHUNK_SIZE) {
- sr_err("Short packet: received %d/%d bytes.", len, CHUNK_SIZE);
- /* TODO: Print the bytes? */
- return FALSE;
- }
-
- log_8byte_chunk((const uint8_t *)&buf);
-
- if (buf[0] != 0xf0) {
- /* First time: Synchronize to the start of a packet. */
- if (!synced_on_first_packet) {
- /* Valid packets start with '+' or '-'. */
- if ((buf[1] != '+') && buf[1] != '-')
- // if ((buf[1] & 0xf0) != 0x10)
- return TRUE;
- synced_on_first_packet = TRUE;
- sr_spew("Successfully synchronized on first packet.");
- }
-
- num_databytes_in_chunk = buf[0] & 0x0f;
- for (i = 0; i < num_databytes_in_chunk; i++)
- pbuf[data_byte_counter++] = buf[1 + i];
-
- /* TODO: Handle > 14 bytes in pbuf? Can this happen? */
- if (data_byte_counter == NUM_DATA_BYTES) {
- log_dmm_packet(pbuf);
- data_byte_counter = 0;
- decode_packet(devc, pbuf);
- memset(pbuf, 0x00, NUM_DATA_BYTES);
- }
- }
-
- /* Abort acquisition if we acquired enough samples. */
- if (devc->num_samples >= devc->limit_samples && devc->limit_samples > 0) {
- sr_info("Requested number of samples reached.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- }
-
- return TRUE;
-}