PWM FE310

pwm_fe310.h

#ifndef INCLUDED_PWM
#define INCLUDED_PWM

#include <stdio.h>
#include <stdbool.h>
#include <metal/machine/platform.h>

// GPIO instance
#define GPIO_ADDR  METAL_SIFIVE_GPIO0_0_BASE_ADDRESS  // There is only one instance
// PWM instance 0 with 8 bits
#define PWM0_ADDR METAL_SIFIVE_PWM0_0_BASE_ADDRESS
// GPIO registers
#define GPIO_IOF_EN_ADDR(GMAX)  (int*)(GMAX + METAL_SIFIVE_GPIO0_IOF_EN)
#define GPIO_IOF_SEL_ADDR(GMAX) (int*)(GMAX + METAL_SIFIVE_GPIO0_IOF_SEL)
#define GPIO_OUT_XOR(GMAX)      (int*)(GMAX + METAL_SIFIVE_GPIO0_OUT_XOR)
// PWM registers
#define PWM_CFG_ADDR(PMAX)      (int*)(PMAX + METAL_SIFIVE_PWM0_PWMCFG)    // Config
#define PWM_COUNT_ADDR(PMAX)    (int*)(PMAX + METAL_SIFIVE_PWM0_PWMCOUNT)  // Count
#define PWMS_ADDR(PMAX)         (int*)(PMAX + METAL_SIFIVE_PWM0_PWMS)      // Scaled count
#define PWM_CMP_0_ADDR(PMAX)    (int*)(PMAX + METAL_SIFIVE_PWM0_PWMCMP0)   // Compare

// PWM config offsets
#define PWMSCALE          0     // 4 bits
#define PWMSTICKY         8     // 1 bit
#define PWMZEROCMP        9     // 1 bit
#define PWMDEGLITCH       10    // 1 bit
#define PWMENALWAYS       12    // 1 bit
#define PWMONESHOT        13    // 1 bit
#define PWM0CENTER        16    // 1 bit
#define PWMCMP0GANG       24    // 1 bit
#define PWMCMP0IP         28    // 1 bit
// Pin

int pwm_set_comp(const uint8_t comp_val);
int pwm_initialize(const uint8_t pwm_pin, const uint8_t comp_value, const bool xo);

#endif /*INCLUDED_PWM*/