dotmatrixr  2.0.0.0
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Dot-Matrix R click

Dot Matrix R Click is a display device Click boardâ„¢ based on a four-digit dot matrix display module, labeled as HCMS-3906 from a company Avago (Broadcom Inc).

click Product page


Click library

  • Author : MikroE Team
  • Date : Jul 2020.
  • Type : SPI type

Software Support

We provide a library for the DotMatrixR 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for DotMatrixR Click driver.

Standard key functions :

Example key functions :

  • Sets BL pin to high or low state

    void dotmatrixr_set_bl_pin_state ( dotmatrixr_t *ctx, uint8_t state );

  • Restart device

    void dotmatrixr_restart ( dotmatrixr_t *ctx );

  • Sets display to written value

    void dotmatrixr_write_ascii ( dotmatrixr_t *ctx, char *ascii_data );

Examples Description

This demo application show data on display.

The demo application is composed of two sections :

Application Init

Configuration device

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
DOTMATRIXR_MAP_MIKROBUS( cfg, MIKROBUS_1 );
dotmatrixr_init( &dotmatrixr, &cfg );
Delay_ms( 100 );
dotmatrixr_restart( &dotmatrixr );
Delay_ms( 500 );
dotmatrixr_set_bl_pin_state( &dotmatrixr, 0 );
dotmatrixr_set_rs_pin_state( &dotmatrixr, 0 );
}

Application Task

Display shows 3 different data in span of 1 second

void application_task ( void )
{
dotmatrixr_write_ascii( &dotmatrixr, &demo_t1[ 0 ] );
Delay_ms( 1000 );
dotmatrixr_write_ascii( &dotmatrixr, &demo_t2[ 0 ] );
Delay_ms( 1000 );
dotmatrixr_write_ascii( &dotmatrixr, &demo_t3[ 0 ] );
Delay_ms( 1000 );
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.DotMatrixR

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.


dotmatrixr_write_ascii
void dotmatrixr_write_ascii(dotmatrixr_t *ctx, char *ascii_data)
Sets display to written value.
application_task
void application_task(void)
Definition: main.c:74
demo_t3
char demo_t3[6]
Definition: main.c:32
DOTMATRIXR_CTRL_BYTE_0_MODE_NORMAL
#define DOTMATRIXR_CTRL_BYTE_0_MODE_NORMAL
Definition: dotmatrixr.h:98
DOTMATRIXR_MAP_MIKROBUS
#define DOTMATRIXR_MAP_MIKROBUS(cfg, mikrobus)
Definition: dotmatrixr.h:53
DOTMATRIXR_CTRL_BYTE_0_PIXEL_PEAK_CURRENT_9p3mA
#define DOTMATRIXR_CTRL_BYTE_0_PIXEL_PEAK_CURRENT_9p3mA
Definition: dotmatrixr.h:95
dotmatrixr_init
DOTMATRIXR_RETVAL dotmatrixr_init(dotmatrixr_t *ctx, dotmatrixr_cfg_t *cfg)
Initialization function.
demo_t2
char demo_t2[6]
Definition: main.c:31
dotmatrixr_ctrl_1
void dotmatrixr_ctrl_1(dotmatrixr_t *ctx, uint8_t ctrl_byte)
Function for writing control word 1.
dotmatrixr_set_rs_pin_state
void dotmatrixr_set_rs_pin_state(dotmatrixr_t *ctx, uint8_t state)
Sets RS pin to high or low state.
DOTMATRIXR_CTRL_BYTE_1_DOUT_DIN
#define DOTMATRIXR_CTRL_BYTE_1_DOUT_DIN
Definition: dotmatrixr.h:108
dotmatrixr_cfg_setup
void dotmatrixr_cfg_setup(dotmatrixr_cfg_t *cfg)
Config Object Initialization function.
dotmatrixr_restart
void dotmatrixr_restart(dotmatrixr_t *ctx)
Restart device.
dotmatrixr_set_bl_pin_state
void dotmatrixr_set_bl_pin_state(dotmatrixr_t *ctx, uint8_t state)
Sets BL pin to high or low state.
demo_t1
char demo_t1[6]
Definition: main.c:30
DOTMATRIXR_CTRL_BYTE_1_OSC_PRESCALER_1
#define DOTMATRIXR_CTRL_BYTE_1_OSC_PRESCALER_1
Definition: dotmatrixr.h:105
application_init
void application_init(void)
Definition: main.c:36
dotmatrixr_cfg_t
Click configuration structure definition.
Definition: dotmatrixr.h:141
dotmatrixr_ctrl_0
void dotmatrixr_ctrl_0(dotmatrixr_t *ctx, uint8_t ctrl_byte)
Function for writing control word 0.
DOTMATRIXR_CTRL_BYTE_0_BRIGHTNESS_30
#define DOTMATRIXR_CTRL_BYTE_0_BRIGHTNESS_30
Definition: dotmatrixr.h:87