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#ifndef _PSXSIO_H
#define _PSXSIO_H
/** Bitrate reload factors */
enum sio_reload_factors
{
/** STOP */
SIO_REL_STOP = 0,
/** MUL1 */
SIO_REL_MUL1 = 1,
/** MUL16 */
SIO_REL_MUL16 = 2,
/** MUL64 */
SIO_REL_MUL64 = 3
};
/** Character (data) length settings */
enum sio_data_len
{
/** Data Length = 5 bits */
SIO_DATA_LEN_5 = 0,
/** Data Length = 6 bits */
SIO_DATA_LEN_6 = 1,
/** Data Length = 7 bits */
SIO_DATA_LEN_7 = 2,
/** Data Length = 8 bits */
SIO_DATA_LEN_8 = 3
};
/** Stop bit length settings */
enum sio_stop_bit
{
/** Length = 1 bit */
SIO_STOP_BIT_1 = 1,
/** Length = 1.5 bits */
SIO_STOP_BIT_1_5 = 2,
/** Length = 2 bits */
SIO_STOP_BIT_2 = 3
};
/** Parity settings */
enum sio_parity
{
/** No parity */
SIO_PARITY_NONE = 0,
/** Odd parity */
SIO_PARITY_ODD = 1,
/** Even parity */
SIO_PARITY_EVEN = 3
};
/** SIO FIFO Buffer (TX/RX) Register [Read/Write] */
#define SIO_TX_RX *((volatile unsigned char*)0x1F801050)
/** SIO Status Register [Read Only] */
#define SIO_STAT *((volatile unsigned short*)0x1F801054)
/** SIO Mode Register [Read/Write] */
#define SIO_MODE *((volatile unsigned short*)0x1F801058)
/** SIO Control Register [Read/Write] */
#define SIO_CTRL *((volatile unsigned short*)0x1F80105A)
/** SIO Baud Rate Register [Read/Write] */
#define SIO_BPSV *((volatile unsigned short*)0x1F80105E)
/**
* Initialize SIO communication at the specified bitrate (baud rate).
* Mode is 8N1. (Data Length = 8 bit, No parity, Stop bit Length = 1 bit)
* @param bitrate Bitrate (baud rate)
*/
void SIOStart(int bitrate);
/**
* Same as SIOStart() but with more control.
* IMPORTANT: Must use defined macros.
* For example setting datalength to 5 should be done with "SIO_DATA_LEN_5"
* and not by simply passing 5 as an argument.
*
* @param bitrate Bit rate (baud rate)
* @param datalength Character (data) length
* @param parity Parity
* @param stopbit Stop bit length
*/
void SIOStartEx(int bitrate, int datalength, int parity, int stopbit);
/**
* Shuts down SIO communication.
*/
void SIOStop(void);
/**
* Read a single byte from the input buffer.
* @return Data byte from input buffer
*/
unsigned char SIOReadByte(void);
/**
* Send a single byte to the output buffer.
* @param data Byte to send
*/
void SIOSendByte(unsigned char data);
/**
* Check if any data is waiting in the input buffer.
* Must be used when fetching data otherwise incorrect data could be read (usually 0x00).
* @return Non-zero if there is data waiting in the input buffer, zero otherwise.
*/
int SIOCheckInBuffer(void);
/**
* Check if port is ready to send data (previous operation finished).
* Must be used when sending data as the output buffer is only 2 bytes long.
* @return Non-zero if port is ready to send data, zero otherwise.
*/
int SIOCheckOutBuffer(void);
#endif
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