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mikroSDK Library

PWM 2 click

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Author: MikroElektronika Team

Last Updated: 2018-07-05

Category: Motor Control

Downloaded: 244 times

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PWM 2 click offers 48 independently controlled PWM channels, available over the onboard headers, perfectly suited for driving LEDs.

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mikroSDK Library Blog

PWM 2 click

PWM 2 click

Native view of the PWM 2 click board.

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PWM 2 click

PWM 2 click

Front and back view of the PWM 2 click board.

View full image

Library Description

The library carries all necessary functions for complete control over PWM 2 click.

Key functions:

  • void pwm2_togglePhaseShift() - Functions for toggle phase shift
  • uint8_t pwm2_setChannel(uint8_t nChannel, uint16_t width,uint8_t correction) - Function for set channel
  • void pwm2_Inits() - Function for initialization of the chip

Example description

The application is composed of three sections:

  • System Initialization -  PWM, SPI and CS pin are initialized PWM is used as a PWMCK signal for the PWM2 click board. SPI is used as a serial data in. CS pin is used as a LDIBLANK signal.
  • Application Initialization -PWMCK signal is set to 15mhz and to give a 50% duty cycle. The PWM2 click channels are initialized to 75% duty cycle, and the phase shift is toggled on.
  • Application Task - (code snippet) - the first 10 PWM2 click channels are switched back and forth from 25% duty cycle to 100% duty cycle every second.
void applicationInit()
{
 uint8_t i;

 pwm2_spiDriverInit( (T_PWM2_P)&_MIKROBUS1_GPIO, (T_PWM2_P)&_MIKROBUS1_SPI );
 Delay_ms( 100 );

 //PWMCK setup:
 period_PWM = PWM_TIM2_Init(_PWM2_CLOCK_15_MHZ);
 PWM_TIM2_Set_Duty(period_PWM/2,_PWM_NON_INVERTED,_PWM_CHANNEL1);
 PWM_TIM2_Start(_PWM_CHANNEL1, &_GPIO_MODULE_TIM2_CH1_PA0);
 //end of PWMCK setup
 dutyMode = 1;

 pwm2_Inits();
 //setting all 48 PWM2 channels on the PWM2 click to 75% duty
 for(i = 1; i < 49; i++)
 {
 pwm2_setChannel(i,_PWM2_50_PERCENT_DUTY,_PWM2_NO_CORRECTION);
 }
 pwm2_togglePhaseShift();
}


Other MikroElektronika libraries used in the example:

  • PWM

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB 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.

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