X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Funi-t-dmm%2Fprotocol.c;h=bd231160fee51633708e60bcbf64159fc296c98d;hb=HEAD;hp=a4b69403f878e5c625295a04ce08fd3d72d0d513;hpb=d4928d7102c6b2f9f7aa51a1b98669bf148fff80;p=libsigrok.git diff --git a/hardware/uni-t-dmm/protocol.c b/hardware/uni-t-dmm/protocol.c deleted file mode 100644 index a4b69403..00000000 --- a/hardware/uni-t-dmm/protocol.c +++ /dev/null @@ -1,283 +0,0 @@ -/* - * This file is part of the sigrok project. - * - * Copyright (C) 2012 Uwe Hermann - * - * 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 -#include -#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, int dmm, const uint8_t *buf) -{ - struct sr_datafeed_packet packet; - struct sr_datafeed_analog analog; - struct fs9721_info info; - float floatval; - int ret; - - memset(&analog, 0, sizeof(struct sr_datafeed_analog)); - - /* Parse the protocol packet. */ - if (dmm == UNI_T_UT61D) - ret = sr_dmm_parse_fs9922(buf, &floatval, &analog); - else if (dmm == VOLTCRAFT_VC820) - ret = sr_fs9721_parse(buf, &floatval, &analog, &info); - if (ret != 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: %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(devc->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."); - - /* 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: %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 uni_t_dmm_receive_data(int fd, int revents, int dmm, 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: %s.", libusb_error_name(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) { - if (dmm == UNI_T_UT61D) { - /* Valid packets start with '+' or '-'. */ - if ((buf[1] != '+') && buf[1] != '-') - return TRUE; - } else if (dmm == VOLTCRAFT_VC820) { - /* Valid packets have 0x1 as high nibble. */ - if (!sr_fs9721_is_packet_start(buf[1])) - 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; - if (!sr_fs9721_packet_valid(pbuf)) { - sr_err("Invalid packet."); - return TRUE; - } - decode_packet(devc, dmm, 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; -} - -SR_PRIV int uni_t_ut61d_receive_data(int fd, int revents, void *cb_data) -{ - return uni_t_dmm_receive_data(fd, revents, UNI_T_UT61D, cb_data); -} - -SR_PRIV int voltcraft_vc820_receive_data(int fd, int revents, void *cb_data) -{ - return uni_t_dmm_receive_data(fd, revents, VOLTCRAFT_VC820, cb_data); -}