Arduino_AL.h

// This file acts as a header for the .ino file.  Since the .ino file is the hardware abstraction layer
// in Arduino world, it also contains prototypes for abstracted hardware calls in addition to prototypes
// for abstracted time functions which in other compilers would just be other .c and .h files

#ifndef __ARDUINOAL_H
#define __ARDUINOAL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>              // Find integer types like "uint8_t"  
#include <stdbool.h>             // Find type "bool"

// defines related to hardware and relevant only to the hardware abstraction layer (this and .ino files)
#define EveChipSelect_PIN     9  // PB1
#define EveAudioEnable_PIN    1  // PD1
#define EvePDN_PIN            8  // PB0
#define SDChipSelect_PIN      3  // PD3
#define SDCardDetect_PIN      4  // PD4
#define Servo_PWM_PIN         6 

// AS5048 Chip
#define AS5048_REG_ANG      0xFE   
#define I2C_Address         0x40

// The rate of reading the angle is important in order to prevent misinterpretting the direction of movement.
// Make the rate high enough that the knob cannot possibly rotate by 180 degrees between samples.
#define CheckSensorInterval 3  // in mS - The need for fast AS5048 samples and Eve refresh limits converge here

// Notes:
// In Arduino we lose access to these defines from outside the .ino, so they are redfined here.
// In order to prevent mysteries, these are defining these with hopefully unique names.
#define FILEREAD   0      
#define FILEWRITE  1 
#define FILEAPPEND 2

#define WorkBuffSz 64UL
extern char LogBuf[WorkBuffSz];         // The singular universal data array used for all things including logging

#define Log(...)  { sprintf(LogBuf,__VA_ARGS__); DebugPrint(LogBuf); } // Stuff string and parms via sprintf and output
// #define Log(...) // Liberate (a lot of) RAM by uncommenting this empty definition

void MainLoop(void);
void GlobalInit(void);

// Hardware peripheral abstraction function prototypes
uint8_t ReadPin(uint8_t);
void SetPin(uint8_t, bool);
void SD_Init(void);
void SPI_Enable(void);
void SPI_Disable(void);
void SPI_Write(uint8_t data);
void SPI_WriteByte(uint8_t data);
void SPI_WriteBuffer(uint8_t *Buffer, uint32_t Length);
void SPI_ReadBuffer(uint8_t *Buffer, uint32_t Length);

// These functions encapsulate Arduino core functions
void DebugPrint(char *str);
void MyDelay(uint32_t DLY);
void SaveTouchMatrix(void);
bool LoadTouchMatrix(void);
void Eve_Reset_HW(void);
uint16_t AS5048_GetRaw(void);    // Lazilly leaving this here instead of going to the trouble of abstracting the core I2C functions

// Function encapsulation for file operations
void FileOpen(char *filename, uint8_t mode);
void FileClose(void);
uint8_t FileReadByte(void);
void FileReadBuf(uint8_t *data, uint32_t NumBytes);
void FileWrite(uint8_t data);
uint32_t FileSize(void);
uint32_t FilePosition(void);
bool FileSeek(uint32_t offset);
bool myFileIsOpen(void);

#ifdef __cplusplus
}
#endif

#endif