#include "utils.h"

#ifndef _PICINTERFACE_H
#define _PICINTERFACE_H

/* Port API */

BIT_AT(PORTB_ADDR,0) PIN_B0;
BIT_AT(PORTB_ADDR,1) PIN_B1;
BIT_AT(PORTB_ADDR,2) PIN_B2;
BIT_AT(PORTB_ADDR,3) PIN_B3;
BIT_AT(PORTB_ADDR,4) PIN_B4;
BIT_AT(PORTB_ADDR,5) PIN_B5;
BIT_AT(PORTB_ADDR,6) PIN_B6;
BIT_AT(PORTB_ADDR,7) PIN_B7;

BIT_AT(PORTC_ADDR,0) PIN_C0;
BIT_AT(PORTC_ADDR,1) PIN_C1;
BIT_AT(PORTC_ADDR,2) PIN_C2;
BIT_AT(PORTC_ADDR,3) PIN_C3;
BIT_AT(PORTC_ADDR,4) PIN_C4;
BIT_AT(PORTC_ADDR,5) PIN_C5;
BIT_AT(PORTC_ADDR,6) PIN_C6;
BIT_AT(PORTC_ADDR,7) PIN_C7;

BIT_AT(PORTD_ADDR,0) PIN_D0;
BIT_AT(PORTD_ADDR,1) PIN_D1;
BIT_AT(PORTD_ADDR,2) PIN_D2;
BIT_AT(PORTD_ADDR,3) PIN_D3;
BIT_AT(PORTD_ADDR,4) PIN_D4;
BIT_AT(PORTD_ADDR,5) PIN_D5;
BIT_AT(PORTD_ADDR,6) PIN_D6;
BIT_AT(PORTD_ADDR,7) PIN_D7;

BIT_AT(PORTE_ADDR,0) PIN_E0;
BIT_AT(PORTE_ADDR,1) PIN_E1;
BIT_AT(PORTE_ADDR,2) PIN_E2;

#define input(p) p

#define output_high(p) p = 1

#define output_low(p) p = 0

#define output_bit(p, bit) p = bit

#define SET_TRIS_A(tris) TRISA = tris
#define SET_TRIS_B(tris) TRISB = tris
#define SET_TRIS_C(tris) TRISC = tris
#define SET_TRIS_D(tris) TRISD = tris
#define SET_TRIS_E(tris) TRISE = tris

/* Interrupt handling API */

#define INT_EXT     0
#define INT_RTCC    1
#define INT_TIMER1  2
#define INT_TIMER2  3
#define INT_TIMER3  4
#define GLOBAL      5

#define H_TO_L 0
#define L_TO_H 0

#ifdef _PIC18F
#define EXT_INT_EDGE(edge) INTEDG0 = edge
#else
#define EXT_INT_EDGE(edge) INTEDG = edge
#endif

void enable_interrupts(int int_source);
void disable_interrupts(int int_source);

/* EEPROM API */

#define read_eeprom(address) 0
#define write_eeprom(address, val) 

/* ADC API */

/* Definitions used for SETUP_ADC_PORTS */
#define ALL_ANALOG       0x80
#define ANALOG_RA3_REF   0x81
#define A_ANALOG         0x82
#define A_ANALOG_RA3_REF 0x83
#define NO_ANALOGS       0x86

/* Definitions used for SETUP_ADC */
#define ADC_OFF            0
#define ADC_CLOCK_DIV_2    1
#define ADC_CLOCK_DIV_8    0x41
#define ADC_CLOCK_DIV_32   0x81
#define ADC_CLOCK_INTERNAL 0xc1
#define ADC_CLOCK_DIV_4    0x101
#define ADC_CLOCK_DIV_16   0x141
#define ADC_CLOCK_DIV_64   0x181

#define SETUP_ADC(settings) \
  ADCON0 = settings & 0xff; ADCON1 |= settings >> 2
#define SETUP_ADC_PORTS(ports) ADCON1 = ports
#define SET_ADC_CHANNEL(channel) ADCON0 &= 0xc7; ADCON0 |= channel << 3

#define READ_ADC ADG0 = 1; for ( ; ADG0; ) ; (ADRESH << 8) | ADRESL

/* Timer API */

#define RTCC_INTERNAL 0

enum {
  RTCC_DIV_2,
  RTCC_DIV_4,
  RTCC_DIV_8,
  RTCC_DIV_16,
  RTCC_DIV_32,
  RTCC_DIV_64,
  RTCC_DIV_128,
  RTCC_DIV_256
};

#define setup_counters(settings, prescale) T0CON = settings | prescale

#define T1_DISABLED       0

#define T1_INTERNAL       0x85
#define T1_EXTERNAL       0x87
#define T1_EXTERNAL_SYNC  0x83

#define T1_DIV_BY_1       0
#define T1_DIV_BY_2       0x10
#define T1_DIV_BY_4       0x20
#define T1_DIV_BY_8       0x30

#define setup_timer_1(settings) T1CON = settings

#define set_timer1(t) TMR1H = t >> 8; TMR1L = t & 0xff

#define get_timer1() TMR1H << 8 | TMR1L

enum {
  T2_DISABLED = 0
  T2_DIV_BY_1 = 4,
  T2_DIV_BY_4,
  T2_DIV_BY_16
};

#define setup_timer_2(settings, duty, postscale) \
  T2CON = settings | (postscale << 3); PR2 = duty

/* PWM definitions */

#define CCP_PWM 0xc0

#define setup_ccp1(mode) CCP1CON = mode
#define setup_ccp2(mode) CCP2CON = mode

#define set_pwm1_duty(duty) CCPR1L = duty
#define set_pwm2_duty(duty) CCPR2L = duty

/* SPI API */

#define SPI_MASTER       0x20
#define SPI_SLAVE        0x24
#define SPI_SS_DISABLED  1

#define SPI_H_TO_L  0x40
#define SPI_L_TO_H  0

#define SPI_CLK_DIV_4   0
#define SPI_CLK_DIV_16  1
#define SPI_CLK_DIV_64  2
#define SPI_CLK_T2      3

#define setup_spi(conf) SSPSTAT |= conf & 0x40; \ // Set SSPSTAT: Set SMP to 0 and set CKE
  SSPCON = 0x10 | (conf & 0x3f); // Set SSPCON: Enable SSPEN, set CKP to 1, set SSPM0-SSPM3

int spi_read(void);

#define spi_write(data) SSPBUF = data; for ( ; !STAT_BF; ) ; SSPBUF;

#endif // _PICINTERFACE_H