/*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
*
* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
*
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <stdlib.h>
+#include <string.h>
#include <glib.h>
#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;
projects / libsigrok.git / blobdiff