76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include "tm4c123gh6pm.h"
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#define STCTRL *((volatile long *) 0xE000E010)
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#define STRELOAD *((volatile long *) 0xE000E014)
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#define STCURRENT *((volatile long *) 0xE000E018)
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#define COUNT_FLAG (1 << 16)
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#define ENABLE (1 << 0)
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#define CLKINT (1 << 2)
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#define MASK_BITS 0x11
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void GPIOF_config(void);
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void GPIOF_int_config(void);
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void main(void)
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{
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SYSCTL_RCC_R &= ~(1 << 20);
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SYSCTL_RCGC0_R |= 0x00100000;
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SYSCTL_RCGCPWM_R = 0x3;
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SYSCTL_RCGC2_R |= 0x20;
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GPIO_PORTF_LOCK_R = 0x4C4F434B; /* unlock commit register*/
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GPIO_PORTF_CR_R = 0x1F;
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GPIO_PORTF_DEN_R= 0x1F;
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GPIO_PORTF_DIR_R= 0x0E;
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GPIO_PORTF_PUR_R = 0x11;
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GPIOF_config();
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GPIOF_Interrupt_config();
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GPIO_PORTF_AFSEL_R |= 0x02;
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GPIO_PORTF_PCTL_R |= 0x50;
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PWM1_2_CTL_R= 0x00000000; //PWM module 1, generator 2 is disabled
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PWM1_2_GENB_R |= 0x80E; //PWM module 1 , generator 2 signal B , invert on compB down count,high on load and low on zero
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PWM1_2_LOAD_R = 0xA0; //load value is 160 for 100kHz signal
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PWM1_2_CMPB_R = 0x50; //compA value is 80 for 50% duty cycle
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PWM1_2_CTL_R |=0x01; //pwm block is enabled
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PWM1_ENABLE_R |=(1<<5); //m1pwm5 signal is given to the pin
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while(1);
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}
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void GPIOF_int_config()
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{
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GPIO_PORTF_IM_R &= ~MASK_BITS;
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GPIO_PORTF_IS_R &= ~MASK_BITS;
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GPIO_PORTF_IBE_R |= MASK_BITS;
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NVIC_PRI7_R = (NVIC_PRI7_R & 0xFF1FFFFF) | (2 << 21);
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NVIC_EN0_R |= (1 << 30);
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GPIO_PORTF_ICR_R = MASK_BITS;
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GPIO_PORTF_IM_R |= MASK_BITS;
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}
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