pwm

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PWM Click

PWM Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : MikroE Team
• Date : Jan 2020.
• Type : I2C type

Software Support

Example Description

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

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Pwm

Example Key Functions

• pwm_cfg_setup Config Object Initialization function.

void pwm_cfg_setup ( pwm_cfg_t *cfg );

• pwm_init Initialization function.

err_t pwm_init ( pwm_t *ctx, pwm_cfg_t *cfg );

• pwm_dev_config Device configuration function.

void pwm_dev_config ( pwm_t *ctx, uint8_t chann_id, uint8_t state );

• pwm_set_channel_raw Set channel raw function.

void pwm_set_channel_raw ( pwm_t *ctx, uint8_t chann_id, uint16_t raw_off_set, uint16_t raw_dc );

• pwm_set_all_raw Set all channels raw function.

void pwm_set_all_raw ( pwm_t *ctx, uint16_t raw_dc );

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.
     * 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.

    pwm_cfg_setup( &cfg );
    PWM_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    pwm_init( &pwm, &cfg );
    Delay_ms ( 100 );
    
    pwm_set_output( &pwm, PWM_ENABLE );
    pwm_dev_config( &pwm, &config0 );
    pwm_set_pre_scale( &pwm, 0x04 );
    pwm_dev_config( &pwm, &config1 );
    pwm_output_config( &pwm,  &config2 );
    Delay_ms ( 100 );
    
    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, " PWM  Click \r\n" );
    log_printf( &logger, "--------------------------\r\n" );
}

Application Task

Changes the duty cycle of all channels every 10 seconds. All data are being logged on USB UART where you can track their changes.

void application_task ( void )
{
    uint8_t chann_id;
    
    pwm_set_all_raw( &pwm, PWM_MAX_RESOLUTION / 2 );
    log_printf( &logger, "All Channels set to 50%% duty cycle \r\n" );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    for ( chann_id = 0; chann_id < 8; chann_id++ )
    {
        pwm_set_channel_raw( &pwm, chann_id, 0, PWM_MAX_RESOLUTION / 4 );
    }
    log_printf( &logger, "Channels 0-7 set to 25%% duty cycle \r\n" );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    for ( chann_id = 0; chann_id < 8; chann_id++ )
    {
        pwm_set_channel_raw( &pwm, chann_id, 0, ( PWM_MAX_RESOLUTION / 4 ) * 3 );
    }
    log_printf( &logger, "Channels 0-7 set to 75%% duty cycle \r\n" );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    pwm_all_chann_state( &pwm, 0 );
    log_printf( &logger, "All Channels disabled \r\n " );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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