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pce-322a: Adding support for reading memory from PCE-322A SPL

This commit is contained in:
Matthieu Guillaumin 2016-12-03 20:33:32 +01:00 committed by Uwe Hermann
parent f5066b2b61
commit ae87e02fad
3 changed files with 254 additions and 9 deletions
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26
src/hardware/pce-322a/api.c
View File

@ -2,6 +2,7 @@
* This file is part of the libsigrok project.
*
* Copyright (C) 2016 George Hopkins <george-hopkins@null.net>
* Copyright (C) 2016 Matthieu Guillaumin <matthieu@guillaum.in>
*
* 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
@ -38,6 +39,7 @@ static const uint32_t devopts[] = {
SR_CONF_SPL_WEIGHT_TIME | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_SPL_MEASUREMENT_RANGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_POWER_OFF | SR_CONF_GET | SR_CONF_SET,
SR_CONF_DATA_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};
static const char *weight_freq[] = {
@ -57,6 +59,11 @@ static const uint64_t meas_ranges[][2] = {
{ 80, 130 },
};
static const char *data_sources[] = {
"Live",
"Memory",
};
static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
struct dev_context *devc;
@ -149,6 +156,12 @@ static int config_get(uint32_t key, GVariant **data,
case SR_CONF_POWER_OFF:
*data = g_variant_new_boolean(FALSE);
break;
case SR_CONF_DATA_SOURCE:
if (devc->cur_data_source == DATA_SOURCE_LIVE)
*data = g_variant_new_string("Live");
else
*data = g_variant_new_string("Memory");
break;
default:
return SR_ERR_NA;
}
@ -215,6 +228,15 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
if (g_variant_get_boolean(data))
ret = pce_322a_power_off(sdi);
break;
case SR_CONF_DATA_SOURCE:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "Live"))
devc->cur_data_source = DATA_SOURCE_LIVE;
else if (!strcmp(tmp_str, "Memory"))
devc->cur_data_source = DATA_SOURCE_MEMORY;
else
return SR_ERR;
break;
default:
ret = SR_ERR_NA;
}
@ -268,6 +290,9 @@ static int config_list(uint32_t key, GVariant **data,
}
*data = g_variant_builder_end(&gvb);
break;
case SR_CONF_DATA_SOURCE:
*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
break;
default:
return SR_ERR_NA;
}
@ -308,6 +333,7 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
devc = sdi->priv;
devc->buffer_len = 0;
devc->memory_state = MEM_STATE_REQUEST_MEMORY_USAGE;
std_session_send_df_header(sdi);

208
src/hardware/pce-322a/protocol.c
View File

@ -2,6 +2,7 @@
* This file is part of the libsigrok project.
*
* Copyright (C) 2016 George Hopkins <george-hopkins@null.net>
* Copyright (C) 2016 Matthieu Guillaumin <matthieu@guillaum.in>
*
* 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
@ -37,6 +38,25 @@ static int send_command(const struct sr_dev_inst *sdi, uint16_t command)
return SR_OK;
}
static int send_long_command(const struct sr_dev_inst *sdi, uint32_t command)
{
struct sr_serial_dev_inst *serial;
uint8_t buffer[4];
buffer[0] = command >> 24;
buffer[1] = command >> 16;
buffer[2] = command >> 8;
buffer[3] = command;
if (!(serial = sdi->conn))
return SR_ERR;
if (serial_write_nonblocking(serial, (const void *)buffer, 4) != 4)
return SR_ERR;
return SR_OK;
}
static void send_data(const struct sr_dev_inst *sdi, float sample)
{
struct dev_context *devc;
@ -60,7 +80,8 @@ static void send_data(const struct sr_dev_inst *sdi, float sample)
sr_session_send(sdi, &packet);
devc->num_samples++;
if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
/* Limiting number of samples is only supported for live data. */
if (devc->cur_data_source == DATA_SOURCE_LIVE && devc->limit_samples && devc->num_samples >= devc->limit_samples)
sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi);
}
@ -104,6 +125,18 @@ static void process_measurement(const struct sr_dev_inst *sdi)
send_data(sdi, value / 10.0);
}
static void process_memory_measurement(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
uint16_t value;
devc = sdi->priv;
value = devc->buffer[devc->buffer_len - 1] << 8;
value |= devc->buffer[devc->buffer_len - 2];
send_data(sdi, value / 10.0);
}
static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
{
struct dev_context *devc;
@ -117,10 +150,99 @@ static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c)
for (i = 1; i < BUFFER_SIZE; i++)
devc->buffer[i - 1] = devc->buffer[i];
devc->buffer[BUFFER_SIZE - 1] = c;
if (devc->buffer[0] == 0x7f && devc->buffer[BUFFER_SIZE - 1] == 0x00) {
process_measurement(sdi);
devc->buffer_len = 0;
}
if (devc->buffer_len == BUFFER_SIZE && devc->buffer[0] == 0x7f
&& devc->buffer[BUFFER_SIZE - 1] == 0x00) {
process_measurement(sdi);
devc->buffer_len = 0;
}
}
static void process_usage_byte(const struct sr_dev_inst *sdi, uint8_t c)
{
struct dev_context *devc;
unsigned int i;
devc = sdi->priv;
if (devc->buffer_len < MEM_USAGE_BUFFER_SIZE) {
devc->buffer[devc->buffer_len++] = c;
} else {
for (i = 1; i < MEM_USAGE_BUFFER_SIZE; i++)
devc->buffer[i - 1] = devc->buffer[i];
devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] = c;
}
if (devc->buffer_len == MEM_USAGE_BUFFER_SIZE && devc->buffer[0] == 0xd1
&& devc->buffer[1] == 0x05 && devc->buffer[2] == 0x00
&& devc->buffer[3] == 0x01 && devc->buffer[4] == 0xd2
&& devc->buffer[MEM_USAGE_BUFFER_SIZE - 1] == 0x20) {
devc->memory_block_usage = devc->buffer[5] << 8 | devc->buffer[6];
devc->memory_last_block_usage = devc->buffer[7];
sr_warn("Memory usage: %d blocks of 256 bytes, 1 block of %d bytes",
devc->memory_block_usage - 1, devc->memory_last_block_usage);
devc->buffer_len = 0;
devc->buffer_skip = 1;
devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
devc->memory_block_cursor = 0;
devc->memory_block_counter = 0;
}
}
static void process_memory_byte(const struct sr_dev_inst *sdi, uint8_t c)
{
struct dev_context *devc;
unsigned int i;
devc = sdi->priv;
if (devc->buffer_len < MEM_DATA_BUFFER_SIZE) {
devc->buffer[devc->buffer_len++] = c;
} else {
for (i = 1; i < MEM_DATA_BUFFER_SIZE; i++)
devc->buffer[i - 1] = devc->buffer[i];
devc->buffer[MEM_DATA_BUFFER_SIZE - 1] = c;
}
if (devc->buffer_skip == 0 \
&& (devc->buffer[devc->buffer_len-2] & 0x7f) == 0x7f
&& (devc->buffer[devc->buffer_len-1] & 0xf7) == 0xf7) {
/* Recording session header bytes found, load next 7 bytes. */
devc->buffer_skip = MEM_DATA_BUFFER_SIZE - 2;
}
if (devc->buffer_skip == 0 && devc->buffer_len == MEM_DATA_BUFFER_SIZE
&& (devc->buffer[0] & 0x7f) == 0x7f && (devc->buffer[1] & 0xf7) == 0xf7
&& devc->buffer[2] == 0x01 && devc->buffer[3] == 0x00) {
/* Print information about recording. */
sr_err("Recording dB(%X) %02x/%02x/%02x %02x:%02x:%02x ",
devc->buffer[4], devc->buffer[5], devc->buffer[6], devc->buffer[7],
devc->buffer[8] & 0x3f, devc->buffer[9], devc->buffer[10]);
/* Set dBA/dBC flag for recording. */
if (devc->buffer[4] == 0x0c) {
devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
} else {
devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
}
send_data(sdi, -1.0); /* Signal switch of recording. */
devc->buffer_skip = 2;
}
if (devc->buffer_skip == 0) {
process_memory_measurement(sdi);
devc->buffer_skip = 1;
} else {
devc->buffer_skip -= 1;
}
devc->memory_block_cursor++; /* uint8_t goes back to 0 after 255. */
if (devc->memory_block_cursor == 0) {
/* Current block is completed. */
devc->memory_block_counter++;
devc->memory_state = MEM_STATE_REQUEST_MEMORY_BLOCK;
}
}
@ -142,10 +264,62 @@ SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data)
if (!(serial = sdi->conn))
return TRUE;
if (revents == G_IO_IN) {
if (serial_read_nonblocking(serial, &c, 1) != 1)
return TRUE;
process_byte(sdi, c);
if (devc->cur_data_source == DATA_SOURCE_MEMORY) {
switch (devc->memory_state) {
case MEM_STATE_REQUEST_MEMORY_USAGE:
/* At init, disconnect and request the memory status. */
sr_warn("Requesting memory usage.");
pce_322a_disconnect(sdi);
devc->memory_state = MEM_STATE_GET_MEMORY_USAGE;
devc->memory_block_usage = 0;
devc->memory_last_block_usage = 0;
devc->memory_block_counter = 0;
devc->memory_block_cursor = 0;
pce_322a_memory_status(sdi);
break;
case MEM_STATE_GET_MEMORY_USAGE:
/* Listen for memory usage answer. */
if (revents == G_IO_IN) {
if (serial_read_nonblocking(serial, &c, 1) != 1)
return TRUE;
process_usage_byte(sdi, c);
}
break;
case MEM_STATE_REQUEST_MEMORY_BLOCK:
/* When cursor is 0, request next memory block. */
if (devc->memory_block_counter <= devc->memory_block_usage) {
sr_warn("Requesting memory block %d.", devc->memory_block_counter);
pce_322a_memory_block(sdi, devc->memory_block_counter);
devc->memory_state = MEM_STATE_GET_MEMORY_BLOCK;
} else {
sr_warn("Exhausted memory blocks.");
return FALSE;
}
break;
case MEM_STATE_GET_MEMORY_BLOCK:
/* Stop after reading last byte of last block. */
if (devc->memory_block_counter >= devc->memory_block_usage
&& devc->memory_block_cursor >= devc->memory_last_block_usage) {
sr_warn("Done reading memory (%d bytes).",
256 * (devc->memory_block_counter - 1)
+ devc->memory_block_cursor);
return FALSE;
}
/* Listen for memory data. */
if (revents == G_IO_IN) {
if (serial_read_nonblocking(serial, &c, 1) != 1)
return TRUE;
process_memory_byte(sdi, c);
}
break;
}
} else {
/* Listen for live data. */
if (revents == G_IO_IN) {
if (serial_read_nonblocking(serial, &c, 1) != 1)
return TRUE;
process_byte(sdi, c);
}
}
return TRUE;
@ -161,6 +335,24 @@ SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi)
return send_command(sdi, CMD_DISCONNECT);
}
SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi)
{
return send_command(sdi, CMD_MEMORY_STATUS);
}
SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi)
{
return send_command(sdi, CMD_MEMORY_CLEAR);
}
SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk)
{
uint8_t buf0 = memblk;
uint8_t buf1 = memblk >> 8;
uint32_t command = CMD_MEMORY_TRANSFER << 16 | buf0 << 8 | buf1;
return send_long_command(sdi, command);
}
SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi)
{
struct dev_context *devc;

29
src/hardware/pce-322a/protocol.h
View File

@ -2,6 +2,7 @@
* This file is part of the libsigrok project.
*
* Copyright (C) 2016 George Hopkins <george-hopkins@null.net>
* Copyright (C) 2016 Matthieu Guillaumin <matthieu@guillaum.in>
*
* 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
@ -28,6 +29,8 @@
#define LOG_PREFIX "pce-322a"
#define BUFFER_SIZE 13
#define MEM_USAGE_BUFFER_SIZE 9
#define MEM_DATA_BUFFER_SIZE 11
enum {
CMD_CONNECT = 0xacff,
@ -53,6 +56,18 @@ enum {
MEAS_RANGE_80_130 = 3,
};
enum {
DATA_SOURCE_LIVE,
DATA_SOURCE_MEMORY,
};
enum {
MEM_STATE_REQUEST_MEMORY_USAGE,
MEM_STATE_GET_MEMORY_USAGE,
MEM_STATE_REQUEST_MEMORY_BLOCK,
MEM_STATE_GET_MEMORY_BLOCK,
};
/** Private, per-device-instance driver context. */
struct dev_context {
/* Model-specific information */
@ -60,18 +75,30 @@ struct dev_context {
uint8_t cur_meas_range;
/* Acquisition settings */
uint8_t cur_data_source;
uint64_t limit_samples;
/* Operational state */
uint64_t num_samples;
/* Temporary state across callbacks */
/* Memory reading state */
uint8_t memory_state; /* State for requesting memory usage before memory blocks. */
uint16_t memory_block_usage; /* Store number of memory blocks used. */
uint8_t memory_last_block_usage; /* Store size of last memory block. */
uint16_t memory_block_counter; /* Number of memory blocks retrieved so far. */
uint8_t memory_block_cursor; /* Number of bytes retrieved in current memory block. */
/* Temporary state across callbacks. */
uint8_t buffer[BUFFER_SIZE];
int buffer_len;
int buffer_skip; /* Number of bytes to skip in memory mode. */
};
SR_PRIV int pce_322a_connect(const struct sr_dev_inst *sdi);
SR_PRIV int pce_322a_disconnect(const struct sr_dev_inst *sdi);
SR_PRIV int pce_322a_memory_status(const struct sr_dev_inst *sdi);
SR_PRIV int pce_322a_memory_clear(const struct sr_dev_inst *sdi);
SR_PRIV int pce_322a_memory_block(const struct sr_dev_inst *sdi, uint16_t memblk);
SR_PRIV int pce_322a_receive_data(int fd, int revents, void *cb_data);
SR_PRIV uint64_t pce_322a_weight_freq_get(const struct sr_dev_inst *sdi);
SR_PRIV int pce_322a_weight_freq_set(const struct sr_dev_inst *sdi, uint64_t freqw);