linefollower  2.0.0.0
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Line Follower click

Line Follower Click carries an array of five QRE1113 miniature reflective object sensors. As the name implies, Line Follower click is best used for line following robots and cars.

click Product page


Click library

  • Author : Nenad Filipovic
  • Date : Dec 2019.
  • Type : GPIO type

Software Support

We provide a library for the LineFollower 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 LineFollower Click driver.

Standard key functions :

Example key functions :

Examples Description

Line Follower click carries an array of five QRE1113 miniature reflective object sensors, reading staus of AN, RST, PWM, TX and RX pins and reading tracking data.

The demo application is composed of two sections :

Application Init

Application Init performs logger and click Initialization.

void application_init ( void )
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_printf( &logger, "----------------------\r\n" );
log_printf( &logger, " - Application Init -\r\n" );
// Click initialization.
LINEFOLLOWER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
linefollower_init( &linefollower, &cfg );
log_printf( &logger, "----------------------\r\n" );
log_printf( &logger, " Line Follower Click \r\n" );
log_printf( &logger, "----------------------\r\n" );
}

Application Task

Application Task shows the functionality of the Line Follower click. Each one of the QRE1113 sensors consist of an infrared transmitter and infrared receiver. By default the sensor output a Logic Level 1, until they encounter a white surface which changes the output signal to 0.

void application_task ( void )
{
linefollower_data_track ( &linefollower, &data_track );
log_printf( &logger, " %u\t%u\t%u\t%u\t%u\r\n",
(uint16_t) data_track.u1,
(uint16_t) data_track.u2,
(uint16_t) data_track.u3,
(uint16_t) data_track.u4,
(uint16_t) data_track.u5);
Delay_ms ( 100 );
}

Note

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.LineFollower

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.


linefollower_cfg_t
Click configuration structure definition.
Definition: linefollower.h:135
linefollower_direction_t::u1
uint8_t u1
Definition: linefollower.h:164
linefollower_direction_t::u5
uint8_t u5
Definition: linefollower.h:168
linefollower_direction_t::u2
uint8_t u2
Definition: linefollower.h:165
LINEFOLLOWER_MAP_MIKROBUS
#define LINEFOLLOWER_MAP_MIKROBUS(cfg, mikrobus)
Definition: linefollower.h:50
linefollower_direction_t
Definition: linefollower.h:162
linefollower_direction_t::u3
uint8_t u3
Definition: linefollower.h:166
application_task
void application_task(void)
Definition: main.c:67
linefollower_data_track
void linefollower_data_track(linefollower_t *ctx, linefollower_direction_t *data_track)
Get status of all pin function.
linefollower_direction_t::u4
uint8_t u4
Definition: linefollower.h:167
application_init
void application_init(void)
Definition: main.c:38
linefollower_cfg_setup
void linefollower_cfg_setup(linefollower_cfg_t *cfg)
Config Object Initialization function.
linefollower_init
LINEFOLLOWER_RETVAL linefollower_init(linefollower_t *ctx, linefollower_cfg_t *cfg)
Initialization function.