X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=hardware%2Ftondaj-sl-814%2Fprotocol.c;h=feeec69aa559c7f947eacc111952aa991cc9aa2e;hp=ef2a7b94f78064505f468cb11d2ceb355024d7ed;hb=ba7dd8bbb8168cba432a844259a3e239aa5f36d7;hpb=aa2af32432b3410421a89303ef48cc990ff39db9 diff --git a/hardware/tondaj-sl-814/protocol.c b/hardware/tondaj-sl-814/protocol.c index ef2a7b94..feeec69a 100644 --- a/hardware/tondaj-sl-814/protocol.c +++ b/hardware/tondaj-sl-814/protocol.c @@ -1,5 +1,5 @@ /* - * This file is part of the sigrok project. + * This file is part of the libsigrok project. * * Copyright (C) 2012 Uwe Hermann * @@ -18,25 +18,190 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include +#include #include #include "libsigrok.h" #include "libsigrok-internal.h" #include "protocol.h" -SR_PRIV int tondaj_sl_814_receive_data(int fd, int revents, void *cb_data) +/* States */ +enum { + SEND_INIT, + GET_INIT_REPLY, + SEND_PACKET_REQUEST, + GET_PACKET, +}; + +static void parse_packet(const uint8_t *buf, float *floatval, + struct sr_datafeed_analog *analog) +{ + gboolean is_a, is_fast; + uint16_t intval; + uint8_t level = 0, level_bits; + + /* Byte 0 [7:7]: 0 = A, 1 = C */ + is_a = ((buf[0] & (1 << 7)) == 0); + + /* Byte 0 [6:6]: Unknown/unused? */ + + /* Byte 0 [5:4]: Level (00 = 40, 01 = 60, 10 = 80, 11 = 100) */ + level_bits = (buf[0] >> 4) & 0x03; + if (level_bits == 0) + level = 40; + else if (level_bits == 1) + level = 60; + else if (level_bits == 2) + level = 80; + else if (level_bits == 3) + level = 100; + + /* Byte 0 [3:3]: 0 = fast, 1 = slow */ + is_fast = ((buf[0] & (1 << 3)) == 0); + + /* Byte 0 [2:0]: value[10..8] */ + /* Byte 1 [7:0]: value[7..0] */ + intval = (buf[0] & 0x7) << 8; + intval |= buf[1]; + + *floatval = (float)intval; + + /* The value on the display always has one digit after the comma. */ + *floatval /= 10; + + analog->mq = SR_MQ_SOUND_PRESSURE_LEVEL; + analog->unit = SR_UNIT_DECIBEL_SPL; + + if (is_a) + analog->mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A; + else + analog->mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C; + + if (is_fast) + analog->mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_F; + else + analog->mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_S; + + /* TODO: How to handle level? */ + (void)level; +} + +static void decode_packet(struct sr_dev_inst *sdi) +{ + struct sr_datafeed_packet packet; + struct sr_datafeed_analog analog; + struct dev_context *devc; + float floatval; + + devc = sdi->priv; + memset(&analog, 0, sizeof(struct sr_datafeed_analog)); + + parse_packet(devc->buf, &floatval, &analog); + + /* 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); + + devc->num_samples++; +} + +int tondaj_sl_814_receive_data(int fd, int revents, void *cb_data) { - const struct sr_dev_inst *sdi; + struct sr_dev_inst *sdi; struct dev_context *devc; + struct sr_serial_dev_inst *serial; + uint8_t buf[3]; + int ret; + + (void)fd; + (void)revents; - if (!(sdi = cb_data)) - return TRUE; + sdi = cb_data; + serial = sdi->conn; + devc = sdi->priv; - if (!(devc = sdi->priv)) - return TRUE; + /* TODO: Parts of this code need to be improved later. */ + + /* State machine. */ + if (devc->state == SEND_INIT) { + /* On the first run, send the "init" command. */ + buf[0] = 0x10; + buf[1] = 0x04; + buf[2] = 0x0d; + sr_spew("Sending init command: %02x %02x %02x.", + buf[0], buf[1], buf[2]); + if ((ret = serial_write(serial, buf, 3)) < 0) { + sr_err("Error sending init command: %d.", ret); + return FALSE; + } + devc->state = GET_INIT_REPLY; + } else if (devc->state == GET_INIT_REPLY) { + /* If we just sent the "init" command, get its reply. */ + if ((ret = serial_read(serial, buf, 2)) < 0) { + sr_err("Error reading init reply: %d.", ret); + return FALSE; + } + sr_spew("Received init reply: %02x %02x.", buf[0], buf[1]); + /* Expected reply: 0x05 0x0d */ + if (buf[0] != 0x05 || buf[1] != 0x0d) { + sr_err("Received incorrect init reply, retrying."); + devc->state = SEND_INIT; + return TRUE; + } + devc->state = SEND_PACKET_REQUEST; + } else if (devc->state == SEND_PACKET_REQUEST) { + /* Request a packet (send 0x30 ZZ 0x0d). */ + buf[0] = 0x30; + buf[1] = 0x00; /* ZZ */ + buf[2] = 0x0d; + sr_spew("Sending data request command: %02x %02x %02x.", + buf[0], buf[1], buf[2]); + if ((ret = serial_write(serial, buf, 3)) < 0) { + sr_err("Error sending request command: %d.", ret); + return FALSE; + } + devc->buflen = 0; + devc->state = GET_PACKET; + } else if (devc->state == GET_PACKET) { + /* Read a packet from the device. */ + ret = serial_read(serial, devc->buf + devc->buflen, + 4 - devc->buflen); + if (ret < 0) { + sr_err("Error reading packet: %d.", ret); + return TRUE; + } + + devc->buflen += ret; + + /* Didn't receive all 4 bytes, yet. */ + if (devc->buflen != 4) + return TRUE; + + sr_spew("Received packet: %02x %02x %02x %02x.", devc->buf[0], + devc->buf[1], devc->buf[2], devc->buf[3]); + + /* Expected reply: AA BB ZZ+1 0x0d */ + if (devc->buf[2] != 0x01 || devc->buf[3] != 0x0d) { + sr_err("Received incorrect request reply, retrying."); + devc->state = SEND_PACKET_REQUEST; + return TRUE; + } + + decode_packet(sdi); + + devc->state = SEND_PACKET_REQUEST; + } else { + sr_err("Invalid state: %d.", devc->state); + return FALSE; + } - if (revents == G_IO_IN) { - /* TODO */ + /* Stop 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); } return TRUE;