C/C++ - Industrial Dual 0-20mA Bricklet 2.0

This is the description of the C/C++ API bindings for the Industrial Dual 0-20mA Bricklet 2.0. General information and technical specifications for the Industrial Dual 0-20mA Bricklet 2.0 are summarized in its hardware description.

An installation guide for the C/C++ API bindings is part of their general description.

Examples

The example code below is Public Domain (CC0 1.0).

Simple

Download (example_simple.c)

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#include <stdio.h>

#include "ip_connection.h"
#include "bricklet_industrial_dual_0_20ma_v2.h"

#define HOST "localhost"
#define PORT 4223
#define UID "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0

int main(void) {
    // Create IP connection
    IPConnection ipcon;
    ipcon_create(&ipcon);

    // Create device object
    IndustrialDual020mAV2 id020;
    industrial_dual_0_20ma_v2_create(&id020, UID, &ipcon);

    // Connect to brickd
    if(ipcon_connect(&ipcon, HOST, PORT) < 0) {
        fprintf(stderr, "Could not connect\n");
        return 1;
    }
    // Don't use device before ipcon is connected

    // Get current current from channel 0
    int32_t current;
    if(industrial_dual_0_20ma_v2_get_current(&id020, 0, &current) < 0) {
        fprintf(stderr, "Could not get current from channel 0, probably timeout\n");
        return 1;
    }

    printf("Current (Channel 0): %f mA\n", current/1000000.0);

    printf("Press key to exit\n");
    getchar();
    industrial_dual_0_20ma_v2_destroy(&id020);
    ipcon_destroy(&ipcon); // Calls ipcon_disconnect internally
    return 0;
}

Callback

Download (example_callback.c)

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#include <stdio.h>

#include "ip_connection.h"
#include "bricklet_industrial_dual_0_20ma_v2.h"

#define HOST "localhost"
#define PORT 4223
#define UID "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0

// Callback function for current callback
void cb_current(uint8_t channel, int32_t current, void *user_data) {
    (void)user_data; // avoid unused parameter warning

    printf("Channel: %u\n", channel);
    printf("Current: %f mA\n", current/1000000.0);
    printf("\n");
}

int main(void) {
    // Create IP connection
    IPConnection ipcon;
    ipcon_create(&ipcon);

    // Create device object
    IndustrialDual020mAV2 id020;
    industrial_dual_0_20ma_v2_create(&id020, UID, &ipcon);

    // Connect to brickd
    if(ipcon_connect(&ipcon, HOST, PORT) < 0) {
        fprintf(stderr, "Could not connect\n");
        return 1;
    }
    // Don't use device before ipcon is connected

    // Register current callback to function cb_current
    industrial_dual_0_20ma_v2_register_callback(&id020,
                                                INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT,
                                                (void *)cb_current,
                                                NULL);

    // Set period for current (channel 0) callback to 1s (1000ms) without a threshold
    industrial_dual_0_20ma_v2_set_current_callback_configuration(&id020, 0, 1000, false, 'x', 0, 0);

    printf("Press key to exit\n");
    getchar();
    industrial_dual_0_20ma_v2_destroy(&id020);
    ipcon_destroy(&ipcon); // Calls ipcon_disconnect internally
    return 0;
}

Threshold

Download (example_threshold.c)

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#include <stdio.h>

#include "ip_connection.h"
#include "bricklet_industrial_dual_0_20ma_v2.h"

#define HOST "localhost"
#define PORT 4223
#define UID "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0

// Callback function for current callback
void cb_current(uint8_t channel, int32_t current, void *user_data) {
    (void)user_data; // avoid unused parameter warning

    printf("Channel: %u\n", channel);
    printf("Current: %f mA\n", current/1000000.0);
    printf("\n");
}

int main(void) {
    // Create IP connection
    IPConnection ipcon;
    ipcon_create(&ipcon);

    // Create device object
    IndustrialDual020mAV2 id020;
    industrial_dual_0_20ma_v2_create(&id020, UID, &ipcon);

    // Connect to brickd
    if(ipcon_connect(&ipcon, HOST, PORT) < 0) {
        fprintf(stderr, "Could not connect\n");
        return 1;
    }
    // Don't use device before ipcon is connected

    // Register current callback to function cb_current
    industrial_dual_0_20ma_v2_register_callback(&id020,
                                                INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT,
                                                (void *)cb_current,
                                                NULL);

    // Configure threshold for current (channel 0) "greater than 10 mA"
    // with a debounce period of 10s (10000ms)
    industrial_dual_0_20ma_v2_set_current_callback_configuration(&id020, 0, 10000, false, '>', 10*1000000, 0);

    printf("Press key to exit\n");
    getchar();
    industrial_dual_0_20ma_v2_destroy(&id020);
    ipcon_destroy(&ipcon); // Calls ipcon_disconnect internally
    return 0;
}

API

Every function of the C/C++ bindings returns an integer which describes an error code. Data returned from the device, when a getter is called, is handled via call by reference. These parameters are labeled with the ret_ prefix.

Possible error codes are:

  • E_OK = 0
  • E_TIMEOUT = -1
  • E_NO_STREAM_SOCKET = -2
  • E_HOSTNAME_INVALID = -3
  • E_NO_CONNECT = -4
  • E_NO_THREAD = -5
  • E_NOT_ADDED = -6 (unused since bindings version 2.0.0)
  • E_ALREADY_CONNECTED = -7
  • E_NOT_CONNECTED = -8
  • E_INVALID_PARAMETER = -9
  • E_NOT_SUPPORTED = -10
  • E_UNKNOWN_ERROR_CODE = -11
  • E_STREAM_OUT_OF_SYNC = -12

as defined in ip_connection.h.

All functions listed below are thread-safe.

Basic Functions

void industrial_dual_0_20ma_v2_create(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, const char *uid, IPConnection *ipcon)

Creates the device object industrial_dual_0_20ma_v2 with the unique device ID uid and adds it to the IPConnection ipcon:

IndustrialDual020mAV2 industrial_dual_0_20ma_v2;
industrial_dual_0_20ma_v2_create(&industrial_dual_0_20ma_v2, "YOUR_DEVICE_UID", &ipcon);

This device object can be used after the IP connection has been connected (see examples above).

void industrial_dual_0_20ma_v2_destroy(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2)

Removes the device object industrial_dual_0_20ma_v2 from its IPConnection and destroys it. The device object cannot be used anymore afterwards.

int industrial_dual_0_20ma_v2_get_current(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, int32_t *ret_current)

Returns the current of the specified channel. The value is in nA and between 0nA and 22505322nA (22.5mA).

It is possible to detect if an IEC 60381-1 compatible sensor is connected and if it works probably.

If the returned current is below 4mA, there is likely no sensor connected or the connected sensor is defective. If the returned current is over 20mA, there might be a short circuit or the sensor is defective.

If you want to get the value periodically, it is recommended to use the INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT callback. You can set the callback configuration with industrial_dual_0_20ma_v2_set_current_callback_configuration().

int industrial_dual_0_20ma_v2_set_channel_led_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, uint8_t config)

Each channel has a corresponding LED. You can turn the LED off, on or show a heartbeat. You can also set the LED to "Channel Status". In this mode the LED can either be turned on with a pre-defined threshold or the intensity of the LED can change with the measured value.

You can configure the channel status behavior with industrial_dual_0_20ma_v2_set_channel_led_status_config().

By default all channel LEDs are configured as "Channel Status".

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_OFF = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_ON = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_SHOW_HEARTBEAT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_SHOW_CHANNEL_STATUS = 3
int industrial_dual_0_20ma_v2_get_channel_led_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, uint8_t *ret_config)

Returns the channel LED configuration as set by industrial_dual_0_20ma_v2_set_channel_led_config()

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_OFF = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_ON = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_SHOW_HEARTBEAT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_CONFIG_SHOW_CHANNEL_STATUS = 3
int industrial_dual_0_20ma_v2_set_channel_led_status_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, int32_t min, int32_t max, uint8_t config)

Sets the channel LED status config. This config is used if the channel LED is configured as "Channel Status", see industrial_dual_0_20ma_v2_set_channel_led_config().

For each channel you can choose between threshold and intensity mode.

In threshold mode you can define a positive or a negative threshold. For a positive threshold set the "min" parameter to the threshold value in nA above which the LED should turn on and set the "max" parameter to 0. Example: If you set a positive threshold of 10mA, the LED will turn on as soon as the current exceeds 10mA and turn off again if it goes below 10mA. For a negative threshold set the "max" parameter to the threshold value in nA below which the LED should turn on and set the "min" parameter to 0. Example: If you set a negative threshold of 10mA, the LED will turn on as soon as the current goes below 10mA and the LED will turn off when the current exceeds 10mA.

In intensity mode you can define a range in nA that is used to scale the brightness of the LED. Example with min=4mA and max=20mA: The LED is off at 4mA and below, on at 20mA and above and the brightness is linearly scaled between the values 4mA and 20mA. If the min value is greater than the max value, the LED brightness is scaled the other way around.

By default the channel LED status config is set to intensity with min=4mA and max=20mA.

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_STATUS_CONFIG_THRESHOLD = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_STATUS_CONFIG_INTENSITY = 1
int industrial_dual_0_20ma_v2_get_channel_led_status_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, int32_t *ret_min, int32_t *ret_max, uint8_t *ret_config)

Returns the channel LED status configuration as set by industrial_dual_0_20ma_v2_set_channel_led_status_config().

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_STATUS_CONFIG_THRESHOLD = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_CHANNEL_LED_STATUS_CONFIG_INTENSITY = 1

Advanced Functions

int industrial_dual_0_20ma_v2_set_sample_rate(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t rate)

Sets the sample rate to either 240, 60, 15 or 4 samples per second. The resolution for the rates is 12, 14, 16 and 18 bit respectively.

Value Description
0 240 samples per second, 12 bit resolution
1 60 samples per second, 14 bit resolution
2 15 samples per second, 16 bit resolution
3 4 samples per second, 18 bit resolution

The default value is 3 (4 samples per second with 18 bit resolution).

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_240_SPS = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_60_SPS = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_15_SPS = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_4_SPS = 3
int industrial_dual_0_20ma_v2_get_sample_rate(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t *ret_rate)

Returns the gain as set by industrial_dual_0_20ma_v2_set_sample_rate().

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_240_SPS = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_60_SPS = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_15_SPS = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_SAMPLE_RATE_4_SPS = 3
int industrial_dual_0_20ma_v2_set_gain(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t gain)

Sets a gain between 1x and 8x. If you want to measure a very small current, you can increase the gain to get some more resolution.

Example: If you measure 0.5mA with a gain of 8x the return value will be 4mA.

The default gain is 1x.

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_1X = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_2X = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_4X = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_8X = 3
int industrial_dual_0_20ma_v2_get_gain(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t *ret_gain)

Returns the gain as set by industrial_dual_0_20ma_v2_set_gain().

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_1X = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_2X = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_4X = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_GAIN_8X = 3
int industrial_dual_0_20ma_v2_get_api_version(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t ret_api_version[3])

Returns the version of the API definition (major, minor, revision) implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

int industrial_dual_0_20ma_v2_get_response_expected(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t function_id, bool *ret_response_expected)

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by industrial_dual_0_20ma_v2_set_response_expected(). For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

See industrial_dual_0_20ma_v2_set_response_expected() for the list of function ID defines available for this function.

int industrial_dual_0_20ma_v2_set_response_expected(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t function_id, bool response_expected)

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is send and errors are silently ignored, because they cannot be detected.

The following function ID defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_CURRENT_CALLBACK_CONFIGURATION = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_SAMPLE_RATE = 5
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_GAIN = 7
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_CHANNEL_LED_CONFIG = 9
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_CHANNEL_LED_STATUS_CONFIG = 11
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_SET_STATUS_LED_CONFIG = 239
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_RESET = 243
  • INDUSTRIAL_DUAL_0_20MA_V2_FUNCTION_WRITE_UID = 248
int industrial_dual_0_20ma_v2_set_response_expected_all(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, bool response_expected)

Changes the response expected flag for all setter and callback configuration functions of this device at once.

int industrial_dual_0_20ma_v2_get_spitfp_error_count(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint32_t *ret_error_count_ack_checksum, uint32_t *ret_error_count_message_checksum, uint32_t *ret_error_count_frame, uint32_t *ret_error_count_overflow)

Returns the error count for the communication between Brick and Bricklet.

The errors are divided into

  • ACK checksum errors,
  • message checksum errors,
  • framing errors and
  • overflow errors.

The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.

int industrial_dual_0_20ma_v2_set_bootloader_mode(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t mode, uint8_t *ret_status)

Sets the bootloader mode and returns the status after the requested mode change was instigated.

You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_BOOTLOADER = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_OK = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_INVALID_MODE = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_NO_CHANGE = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT = 3
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT = 4
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_STATUS_CRC_MISMATCH = 5
int industrial_dual_0_20ma_v2_get_bootloader_mode(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t *ret_mode)

Returns the current bootloader mode, see industrial_dual_0_20ma_v2_set_bootloader_mode().

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_BOOTLOADER = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • INDUSTRIAL_DUAL_0_20MA_V2_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
int industrial_dual_0_20ma_v2_set_write_firmware_pointer(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint32_t pointer)

Sets the firmware pointer for industrial_dual_0_20ma_v2_write_firmware(). The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256).

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

int industrial_dual_0_20ma_v2_write_firmware(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t data[64], uint8_t *ret_status)

Writes 64 Bytes of firmware at the position as written by industrial_dual_0_20ma_v2_set_write_firmware_pointer() before. The firmware is written to flash every 4 chunks.

You can only write firmware in bootloader mode.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

int industrial_dual_0_20ma_v2_set_status_led_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t config)

Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.

You can also turn the LED permanently on/off or show a heartbeat.

If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_OFF = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_ON = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_SHOW_STATUS = 3
int industrial_dual_0_20ma_v2_get_status_led_config(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t *ret_config)

Returns the configuration as set by industrial_dual_0_20ma_v2_set_status_led_config()

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_OFF = 0
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_ON = 1
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • INDUSTRIAL_DUAL_0_20MA_V2_STATUS_LED_CONFIG_SHOW_STATUS = 3
int industrial_dual_0_20ma_v2_get_chip_temperature(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, int16_t *ret_temperature)

Returns the temperature in °C as measured inside the microcontroller. The value returned is not the ambient temperature!

The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.

int industrial_dual_0_20ma_v2_reset(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2)

Calling this function will reset the Bricklet. All configurations will be lost.

After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!

int industrial_dual_0_20ma_v2_write_uid(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint32_t uid)

Writes a new UID into flash. If you want to set a new UID you have to decode the Base58 encoded UID string into an integer first.

We recommend that you use Brick Viewer to change the UID.

int industrial_dual_0_20ma_v2_read_uid(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint32_t *ret_uid)

Returns the current UID as an integer. Encode as Base58 to get the usual string version.

int industrial_dual_0_20ma_v2_get_identity(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, char ret_uid[8], char ret_connected_uid[8], char *ret_position, uint8_t ret_hardware_version[3], uint8_t ret_firmware_version[3], uint16_t *ret_device_identifier)

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c' or 'd'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions

void industrial_dual_0_20ma_v2_register_callback(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, int16_t callback_id, void *function, void *user_data)

Registers the given function with the given callback_id. The user_data will be passed as the last parameter to the function.

The available callback IDs with corresponding function signatures are listed below.

int industrial_dual_0_20ma_v2_set_current_callback_configuration(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, uint32_t period, bool value_has_to_change, char option, int32_t min, int32_t max)

The period in ms is the period with which the INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

It is furthermore possible to constrain the callback with thresholds.

The option-parameter together with min/max sets a threshold for the INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT callback.

The following options are possible:

Option Description
'x' Threshold is turned off
'o' Threshold is triggered when the value is outside the min and max values
'i' Threshold is triggered when the value is inside or equal to the min and max values
'<' Threshold is triggered when the value is smaller than the min value (max is ignored)
'>' Threshold is triggered when the value is greater than the min value (max is ignored)

If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.

The default value is (0, false, 'x', 0, 0).

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_OFF = 'x'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_OUTSIDE = 'o'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_INSIDE = 'i'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_SMALLER = '<'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_GREATER = '>'
int industrial_dual_0_20ma_v2_get_current_callback_configuration(IndustrialDual020mAV2 *industrial_dual_0_20ma_v2, uint8_t channel, uint32_t *ret_period, bool *ret_value_has_to_change, char *ret_option, int32_t *ret_min, int32_t *ret_max)

Returns the callback configuration as set by industrial_dual_0_20ma_v2_set_current_callback_configuration().

The following defines are available for this function:

  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_OFF = 'x'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_OUTSIDE = 'o'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_INSIDE = 'i'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_SMALLER = '<'
  • INDUSTRIAL_DUAL_0_20MA_V2_THRESHOLD_OPTION_GREATER = '>'

Callbacks

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done with the industrial_dual_0_20ma_v2_register_callback() function. The parameters consist of the device object, the callback ID, the callback function and optional user data:

void my_callback(int p, void *user_data) {
    printf("parameter: %d\n", p);
}

industrial_dual_0_20ma_v2_register_callback(&industrial_dual_0_20ma_v2, INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_EXAMPLE, (void *)my_callback, NULL);

The available constants with corresponding callback function signatures are described below.

Note

Using callbacks for recurring events is always preferred compared to using getters. It will use less USB bandwidth and the latency will be a lot better, since there is no round trip time.

INDUSTRIAL_DUAL_0_20MA_V2_CALLBACK_CURRENT
void callback(uint8_t channel, int32_t current, void *user_data)

This callback is triggered periodically according to the configuration set by industrial_dual_0_20ma_v2_set_current_callback_configuration().

The parameter is the same as industrial_dual_0_20ma_v2_get_current().

Constants

INDUSTRIAL_DUAL_0_20MA_V2_DEVICE_IDENTIFIER

This constant is used to identify a Industrial Dual 0-20mA Bricklet 2.0.

The industrial_dual_0_20ma_v2_get_identity() function and the IPCON_CALLBACK_ENUMERATE callback of the IP Connection have a device_identifier parameter to specify the Brick's or Bricklet's type.

INDUSTRIAL_DUAL_0_20MA_V2_DEVICE_DISPLAY_NAME

This constant represents the human readable name of a Industrial Dual 0-20mA Bricklet 2.0.