periph_cpu.h

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/*
 * Copyright (C) 2017 Ken Rabold
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */
 
#pragma once

 
#include <inttypes.h>
 
#include "periph_cpu_common.h"
#include "cpu.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef DOXYGEN
#define HAVE_GPIO_T
typedef uint8_t gpio_t;
#endif

#define CPUID_LEN           (12U)

#define GPIO_UNDEF          (0xff)

#define GPIO_PIN(x, y)      (x | y)

#define GPIO_INTR_PRIORITY  (3)

typedef struct {
    uint32_t addr;              
    gpio_t rx;                  
    gpio_t tx;                  
    irqn_t isr_num;             
} uart_conf_t;

#define UART_ISR_PRIO       (2)

#define PERIPH_SPI_NEEDS_TRANSFER_BYTE  1
#define PERIPH_SPI_NEEDS_TRANSFER_REG   1
#define PERIPH_SPI_NEEDS_TRANSFER_REGS  1

typedef struct {
    uint32_t addr;          
    gpio_t mosi;            
    gpio_t miso;            
    gpio_t sclk;            
} spi_conf_t;

#define PERIPH_TIMER_PROVIDES_SET

#define PERIPH_I2C_NEED_READ_REG
#define PERIPH_I2C_NEED_WRITE_REG
#define PERIPH_I2C_NEED_READ_REGS
#define PERIPH_I2C_NEED_WRITE_REGS
 
#ifndef DOXYGEN
#define HAVE_I2C_SPEED_T
typedef enum {
    I2C_SPEED_NORMAL,       
    I2C_SPEED_FAST,         
} i2c_speed_t;
#endif /* ndef DOXYGEN */

typedef struct {
    uint32_t addr;              
    gpio_t scl;                 
    gpio_t sda;                 
    i2c_speed_t speed;          
} i2c_conf_t;

#define NWDT_TIME_LOWER_LIMIT           (1)
/* Ensure the internal "count" variable stays within the uint32 bounds.
   This variable corresponds to max_time * RTC_FREQ / MS_PER_SEC. On fe310,
   RTC_FREQ is 32768Hz. The 15 right shift is equivalent to a division by RTC_FREQ.
 */
#define NWDT_TIME_UPPER_LIMIT           ((UINT32_MAX >> 15)  * MS_PER_SEC + 1)

#define WDT_INTR_PRIORITY               (PLIC_NUM_PRIORITIES)

#define WDT_HAS_STOP                    (1)

#define RTT_INTR_PRIORITY   (2)
 
#define RTT_MAX_VALUE       (0xffffffff)
#define RTT_CLOCK_FREQUENCY (32768U)                /* in Hz */
#define RTT_MAX_FREQUENCY   (RTT_CLOCK_FREQUENCY)   /* in Hz */
#define RTT_MIN_FREQUENCY   (1U)                    /* in Hz */
 
#ifndef RTT_FREQUENCY
#define RTT_FREQUENCY       (RTT_MAX_FREQUENCY)     /* in Hz */
#endif

void fe310_clock_init(void);

 
#ifdef __cplusplus
}
#endif