pwm  2.0.0.0
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PWM click

PWM click is a simple solution for controlling 16 PWM outputs through a single I2C interface. You can use it to control anything from a simple LED strip to a complex robot with a multitude of moving parts.

click Product page


Click library

Software Support

We provide a library for the Pwm 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 Pwm Click driver.

Standard key functions :

Example key functions :

Examples Description

This is an example that shows some of the functions that PWM click has.

The demo application is composed of two sections :

Application Init

Initalizes I2C driver, enables output, configures device, sets prescaling, configures output and makes an initial log.

void application_init ( void )
{
log_cfg_t log_cfg;
pwm_cfg_t cfg;
// Logger initialization.
log_cfg.level = LOG_LEVEL_DEBUG;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_printf( &logger, "---- Application Init ----\r\n" );
// Click initialization.
pwm_cfg_setup( &cfg );
PWM_MAP_MIKROBUS( cfg, MIKROBUS_1 );
pwm_init( &pwm, &cfg );
Delay_ms( 100 );
pwm_dev_config( &pwm, &config );
pwm_set_pre_scale( &pwm, 0x04 );
pwm_dev_config( &pwm, &config );
pwm_output_config( &pwm, &config1 );
Delay_ms( 100 );
log_printf( &logger, "--------------------------\r\n" );
log_printf( &logger, " PWM Click \r\n" );
log_printf( &logger, "--------------------------\r\n" );
}

Application Task

Initalizes I2C driver, enables output, configures device, sets prescaling, configures output and makes an initial log.

void application_task ( void )
{
uint16_t raw_dc;
uint8_t chann_id;
uint8_t duty_cycle;
chann_id = 0;
log_printf( &logger, "Channel 0 false state \r\n " );
pwm_channel_state( &pwm, chann_id, 0 );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 2000 );
log_printf( &logger, "Channel 0 set raw \r\n" );
for ( raw_dc = 0; raw_dc < PWM_MAX_RESOLUTION; raw_dc += 256 )
{
pwm_set_channel_raw( &pwm, chann_id, 0, raw_dc );
log_printf( &logger, " >\r\n" );
Delay_ms( 500 );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 1000 );
log_printf( &logger, "Channel 0 set \r\n" );
for ( duty_cycle = 0; duty_cycle < 100; duty_cycle += 10 )
{
pwm_set_channel_raw( &pwm, chann_id, 0, duty_cycle );
log_printf( &logger, " > \r\n" );
Delay_ms( 500 );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 1000 );
log_printf( &logger, "All Channels raw set \r\n" );
for ( raw_dc = 0; raw_dc < PWM_MAX_RESOLUTION; raw_dc += 256 )
{
pwm_set_all_raw( &pwm, raw_dc );
log_printf( &logger, " >\r\n" );
Delay_ms( 500 );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 1000 );
log_printf( &logger, "All Channels set \r\n" );
for ( duty_cycle = 0; duty_cycle < 100; duty_cycle += 10 )
{
pwm_set_all( &pwm, duty_cycle );
log_printf( &logger, " >\r\n" );
Delay_ms( 500 );
}
log_printf( &logger, "\r\n" );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 1000 );
log_printf( &logger, "All Channels false state \r\n " );
pwm_all_chann_state( &pwm, 0 );
log_printf( &logger, "--------------------------\r\n" );
Delay_ms( 2000 );
}

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:

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.