pca_pwm_10bit_2ch.c File Reference

#include "fw_hal.h"

Go to the source code of this file.

Functions
void	main (void)

Variables
__BIT	dir = SET
uint16_t	dc = 0

Function Documentation

main()

void main

(

void

)

Definition at line 20 of file pca_pwm_10bit_2ch.c.

{
    SYS_SetClock();
    // UART1, baud 115200, baud source Timer1, 1T mode, no interrupt
    UART1_Config8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
 
    // Set GPIO pin mode
    GPIO_P3_SetMode(GPIO_Pin_2|GPIO_Pin_3, GPIO_Mode_Output_PP);
 
    // Stop PCA/PWM 
    PCA_SetCounterState(HAL_State_OFF);
    // Stop counter in idle mode
    PCA_SetStopCounterInIdle(HAL_State_ON);
    // Use SYSCLK as clock source
    PCA_SetClockSource(PCA_ClockSource_SysClkDiv12);
    // Turn off overflow interrupt
    PCA_EnableCounterOverflowInterrupt(HAL_State_OFF);
 
    // Set PCA0 and PCA1 to PWM mode
    PCA_PCA0_SetWorkMode(PCA_WorkMode_PWM_NonInterrupt);
    PCA_PCA1_SetWorkMode(PCA_WorkMode_PWM_NonInterrupt);
    // Set both to 8-bit PWM
    PCA_PWM0_SetBitWidth(PCA_PWM_BitWidth_10);
    PCA_PWM1_SetBitWidth(PCA_PWM_BitWidth_10);
    // Set initial duty cycle
    PCA_PCA0_SetCompareValue10bit(dc);
    PCA_PCA1_SetCompareValue10bit(~dc & 0x3FF);
    // Set output port for STC8G1K08A, PWM0:P32, PWM1:P33
    PCA_SetPort(PCA_AlterPort_G1K08A_P55_P32_P33_P54);
    // Start PWM
    PCA_SetCounterState(HAL_State_ON);
 
    while(1)
    {
        PCA_PCA0_ChangeCompareValue10bit(dc);
        PCA_PCA1_ChangeCompareValue10bit(~dc & 0x3FF);
        UART1_TxHex(dc >> 8);
        UART1_TxHex(dc & 0xFF);
        if (dir)
        {
            dc++;
            if (dc == 0x03FF) dir = !dir;
        }
        else
        {
            dc--;
            if (dc == 0) dir = !dir;
        }
        UART1_TxString("\r\n");
        SYS_Delay(10);
    }
}

Variable Documentation

dc

uint16_t dc = 0

Definition at line 18 of file pca_pwm_10bit_2ch.c.

dir

__BIT dir = SET

Definition at line 17 of file pca_pwm_10bit_2ch.c.