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Author: MIKROE
Last Updated: 2024-10-31
Package Version: 2.1.0.4
mikroSDK Library: 2.0.0.0
Category: LED segment
Downloaded: 82 times
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License: MIT license
7-SEG 2 Click is a compact add-on board that represents an easy solution for adding a numeric or hexadecimal display to your application. This board features the LDT-M2804RI, a three-digit seven-segment display from Lumex. The display has a 0.28” height, red LED segments, gray faces, and white diffused segments. All three digits come with a following dot point that can be used as a decimal point in displaying the number values.
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7-SEG 2 Click is a compact add-on board that represents an easy solution for adding a numeric or hexadecimal display to your application. This board features the LDT-M2804RI, a three-digit seven-segment display from Lumex. The display has a 0.28” height, red LED segments, gray faces, and white diffused segments. All three digits come with a following dot point that can be used as a decimal point in displaying the number values.
We provide a library for the 7-SEG 2 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for 7-SEG 2 Click driver.
c7seg2_cfg_setup
Config Object Initialization function.
void c7seg2_cfg_setup ( c7seg2_cfg_t *cfg );
c7seg2_init
Initialization function.
err_t c7seg2_init ( c7seg2_t *ctx, c7seg2_cfg_t *cfg );
c7seg2_default_cfg
Click Default Configuration function.
err_t c7seg2_default_cfg ( c7seg2_t *ctx );
c7seg2_set_segments_current
This function is used to set the current value of the segment's leds.
err_t c7seg2_set_segments_current ( c7seg2_t *ctx, float current_val );
c7seg2_write_segment
This function is used to write a number [0..9] to a selected segment [0..2] with or w/o a decimal pointer.
err_t c7seg2_write_segment ( c7seg2_t *ctx, uint8_t segment, uint8_t number, uint8_t dpt );
c7seg2_write_number
This function is used to write a number [0..999] to a selected segment [0..2] with or w/o a decimal pointer.
err_t c7seg2_write_number ( c7seg2_t *ctx, uint16_t number, uint8_t dpt );
The example demonstrates the use of the 7-SEG 2 Click board by displaying a counter number [0.00-9.99] which is incremented by 0.01 at a desired rate.
The demo application is composed of two sections :
Initializes the driver and performs default configuration, sets the device in output enabled mode and checks communication by reading device ID.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
c7seg2_cfg_t c7seg2_pnp_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
c7seg2_cfg_setup( &c7seg2_pnp_cfg );
C7SEG2_MAP_MIKROBUS( c7seg2_pnp_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == c7seg2_init( &c7seg2, &c7seg2_pnp_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
uint8_t device_id = 0;
c7seg2_read_reg( &c7seg2, C7SEG2_REG_DEVICE_ID, &device_id );
if ( C7SEG2_DEVICE_ID != device_id )
{
log_error( &logger, " Communication error." );
for ( ; ; );
}
if ( C7SEG2_ERROR == c7seg2_default_cfg ( &c7seg2 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Writes a counter number [0.00-9.99] to the display as frequently as possible. The displayed counter value is incremented by 0.01 at a rate defined with the C7SEG2_NUM_COUNTER_RATE macro.
void application_task ( void )
{
static uint16_t counter = 0;
static uint16_t time = 0;
c7seg2_write_number( &c7seg2, counter, C7SEG2_DP_AT_SEGMENT_2 );
if ( ++time >= C7SEG2_NUM_COUNTER_RATE )
{
if ( ++counter > C7SEG2_MAX_NUMBER )
{
counter = 0;
}
time = 0;
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
Additional notes and informations
Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.