+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012-2013 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"
-
-extern struct dmm_info udmms[];
-
-/*
- * 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-D02 RS232 cable.
- *
- * This driver is meant to support all USB/HID cables, and various DMMs that
- * can be attached to a PC via these cables. Currently only the UT-D04 cable
- * (new version) is supported/tested.
- * The UT-D02 RS232 cable is handled by the 'serial-dmm' driver.
- *
- * 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)
- */
-
-static void decode_packet(struct sr_dev_inst *sdi, int dmm, const uint8_t *buf,
- void *info)
-{
- struct dev_context *devc;
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- float floatval;
- int ret;
-
- devc = sdi->priv;
- memset(&analog, 0, sizeof(struct sr_datafeed_analog));
-
- /* Parse the protocol packet. */
- ret = udmms[dmm].packet_parse(buf, &floatval, &analog, info);
- if (ret != SR_OK) {
- sr_dbg("Invalid DMM packet, ignoring.");
- return;
- }
-
- /* If this DMM needs additional handling, call the resp. function. */
- if (udmms[dmm].dmm_details)
- udmms[dmm].dmm_details(&analog, info);
-
- /* Send a sample packet with one analog value. */
- analog.channels = sdi->channels;
- 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 sr_dev_inst *sdi, uint16_t baudrate)
-{
- int ret;
- uint8_t buf[5];
- struct sr_usb_dev_inst *usb;
-
- usb = sdi->conn;
-
- /* Detach kernel drivers which grabbed this device (if any). */
- if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
- ret = libusb_detach_kernel_driver(usb->devhdl, 0);
- if (ret < 0) {
- sr_err("Failed to detach kernel driver: %s.",
- libusb_error_name(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(usb->devhdl, 0)) < 0) {
- sr_err("Failed to claim interface 0: %s.",
- libusb_error_name(ret));
- return SR_ERR;
- }
- sr_dbg("Successfully claimed interface 0.");
-
- /* Set data for the HID feature report (e.g. baudrate). */
- 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(
- 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: %s.", libusb_error_name(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]);
-}
-
-static int get_and_handle_data(struct sr_dev_inst *sdi, int dmm, void *info)
-{
- struct dev_context *devc;
- uint8_t buf[CHUNK_SIZE], *pbuf;
- int i, ret, len, num_databytes_in_chunk;
- struct sr_usb_dev_inst *usb;
-
- devc = sdi->priv;
- usb = sdi->conn;
- pbuf = devc->protocol_buf;
-
- /* On the first run, we need to init the HID chip. */
- if (devc->first_run) {
- if ((ret = hid_chip_init(sdi, udmms[dmm].baudrate)) != SR_OK) {
- sr_err("HID chip init failed: %d.", ret);
- return SR_ERR;
- }
- memset(pbuf, 0x00, DMM_BUFSIZE);
- devc->first_run = FALSE;
- }
-
- memset(&buf, 0x00, CHUNK_SIZE);
-
- /* Get data from EP2 using an interrupt transfer. */
- ret = libusb_interrupt_transfer(
- 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: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
-
- if (len != CHUNK_SIZE) {
- sr_err("Short packet: received %d/%d bytes.", len, CHUNK_SIZE);
- /* TODO: Print the bytes? */
- return SR_ERR;
- }
-
- log_8byte_chunk((const uint8_t *)&buf);
-
- /* If there are no data bytes just return (without error). */
- if (buf[0] == 0xf0)
- return SR_OK;
-
- devc->bufoffset = 0;
-
- /*
- * Append the 1-7 data bytes of this chunk to pbuf.
- *
- * Special case:
- * DMMs with Cyrustek ES51922 chip need serial settings of
- * 19230/7o1. The WCH CH9325 UART to USB/HID chip used in (some
- * versions of) the UNI-T UT-D04 cable however, will also send
- * the parity bit to the host in the 8-byte data chunks. This bit
- * is encoded in bit 7 of each of the 1-7 data bytes and must thus
- * be removed in order for the actual ES51922 protocol parser to
- * work properly.
- */
- num_databytes_in_chunk = buf[0] & 0x0f;
- for (i = 0; i < num_databytes_in_chunk; i++, devc->buflen++) {
- pbuf[devc->buflen] = buf[1 + i];
- if (udmms[dmm].packet_parse == sr_es519xx_19200_14b_parse)
- pbuf[devc->buflen] &= ~(1 << 7);
- }
-
- /* Now look for packets in that data. */
- while ((devc->buflen - devc->bufoffset) >= udmms[dmm].packet_size) {
- if (udmms[dmm].packet_valid(pbuf + devc->bufoffset)) {
- log_dmm_packet(pbuf + devc->bufoffset);
- decode_packet(sdi, dmm, pbuf + devc->bufoffset, info);
- devc->bufoffset += udmms[dmm].packet_size;
- } else {
- devc->bufoffset++;
- }
- }
-
- /* Move remaining bytes to beginning of buffer. */
- for (i = 0; i < devc->buflen - devc->bufoffset; i++)
- pbuf[i] = pbuf[devc->bufoffset + i];
- devc->buflen -= devc->bufoffset;
-
- return SR_OK;
-}
-
-static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
-{
- int ret;
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- int64_t time_ms;
-
- (void)fd;
- (void)revents;
-
- sdi = cb_data;
- devc = sdi->priv;
-
- if ((ret = get_and_handle_data(sdi, dmm, info)) != SR_OK)
- return FALSE;
-
- /* Abort acquisition if we acquired enough samples. */
- if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
- sr_info("Requested number of samples reached.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- }
-
- if (devc->limit_msec) {
- time_ms = (g_get_monotonic_time() - devc->starttime) / 1000;
- if (time_ms > (int64_t)devc->limit_msec) {
- sr_info("Requested time limit reached.");
- sdi->driver->dev_acquisition_stop(sdi, cb_data);
- return TRUE;
- }
- }
-
- return TRUE;
-}
-
-#define RECEIVE_DATA(ID_UPPER, DMM_DRIVER) \
-SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
- struct DMM_DRIVER##_info info; \
- return receive_data(fd, revents, ID_UPPER, &info, cb_data); }
-
-/* Driver-specific receive_data() wrappers */
-RECEIVE_DATA(TECPEL_DMM_8061, fs9721)
-RECEIVE_DATA(UNI_T_UT60A, fs9721)
-RECEIVE_DATA(UNI_T_UT60E, fs9721)
-RECEIVE_DATA(UNI_T_UT60G, es519xx)
-RECEIVE_DATA(UNI_T_UT61B, fs9922)
-RECEIVE_DATA(UNI_T_UT61C, fs9922)
-RECEIVE_DATA(UNI_T_UT61D, fs9922)
-RECEIVE_DATA(UNI_T_UT61E, es519xx)
-RECEIVE_DATA(VOLTCRAFT_VC820, fs9721)
-RECEIVE_DATA(VOLTCRAFT_VC830, fs9922)
-RECEIVE_DATA(VOLTCRAFT_VC840, fs9721)
-RECEIVE_DATA(TENMA_72_7745, es519xx)
-RECEIVE_DATA(TENMA_72_7750, es519xx)
projects / libsigrok.git / blobdiff