spi.c File Reference

SPI implementation. More...

#include <msp430.h>
#include "spi.h"
#include "cc2480ai.h"
#include "uart.h"
#include "im.h"

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Macros
#define	SPI_SRDYBIT   BIT6
	SRDY bit.
#define	SPI_SETSRDYDETECTUP   P2IES &= ~SPI_SRDYBIT
	Trigger interrupt when SRDY goes up.
#define	SPI_SETSRDYDETECTDOWN   P2IES |= SPI_SRDYBIT
	Trigger interrupt when SRDY goes down.
#define	SPI_SSBIT   0x01
	SS bit mask.
#define	SPI_MRDYBIT   BIT6
	MRDY bit mask.
#define	SPI_CLRMRDY   P3OUT &= ~(SPI_MRDYBIT | SPI_SSBIT)
	Clear SS and MRDY bits.
#define	SPI_SETMRDY   P3OUT |= SPI_MRDYBIT | SPI_SSBIT
	Set SS and MRDY bits.
#define	SPI_FRAMEHDRSIZE   3
	Size of Header of a frame: Length, cmd0 and cmd1.

Typedefs
typedef enum spi_state	spi_state
	States for SPI.

Enumerations
enum	spi_state {   SPI_INIT, SPI_IDLE, SPI_AREQ_START, SPI_AREQ_SENDING,   SPI_AREQ_SENT, SPI_SREQ_START, SPI_SREQ_SENDING, SPI_SREQ_SENT,   SPI_SREQ_RECEIVING_START, SPI_SREQ_RECEIVING, SPI_SREQ_RECEIVING_OVER, SPI_SREQ_RECEIVED,   SPI_POLL_START, SPI_POLL_RECEIVING_START, SPI_POLL_RECEIVING, SPI_POLL_RECEIVING_OVER,   SPI_POOL_RECEIVED }
	States for SPI.

Functions
void	spi_snd ()
	SPI send. More...
void	spi_setPollCmd ()
	Set poll command. More...
void	spi_process_message ()
	Process SPI message. More...
void	spi_init ()
	SPI initialization. More...
UInt16	spi_proccess ()
	SPI proccess. More...
UInt8	spi_reqBegin (UInt8 len, UInt8 cmd0, UInt8 cmd1)
	Request begin. More...
UInt8	spi_reqData (UInt8 len, void *pBuf)
	Request data. More...
void	spi_reqEnd (UInt8 forwardToSerial)
	Request end. More...
UInt8	spi_busy ()
	SPI busy. More...
void	SPI_SRDYISR ()
	ISR SRDY. More...
void	SPI_USCIB0RX_ISR ()
	USCIB0 RX. More...

Variables
char	spi_buf [SPI_BUFSIZE]
	SPI buffer, used to send and receive data.
spi_state	spi_currentState
	Current state of SPI. More...
char *	spi_pBuf
	Pointer to the position being transfered of buffer.
UInt16	spi_bytesLeft
	Amount of data queued to TX/RX.
UInt8	spi_receiveOverFlow
	Data to receive that exceeds SPI_BUFSIZE.
UInt8	spi_currentFreeBytes
	Free bytes on current packet.
UInt8	spi_freezeDetect

Detailed Description

SPI implementation.

Definition in file spi.c.

Function Documentation

void spi_process_message

(

)

Process SPI message.

This function calls the external function to process incoming data

Definition at line 273 of file spi.c.

References ccai_process_message(), spi_buf, and uart_forwardCmd().

Referenced by spi_snd().

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void spi_setPollCmd

(

)

Set poll command.

This function setups a Poll command on the buffer start and points to it.

Definition at line 554 of file spi.c.

References spi_buf, spi_bytesLeft, SPI_FRAMEHDRSIZE, and spi_pBuf.

Referenced by SPI_SRDYISR().

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void spi_snd

(

)

SPI send.

This function sends and receives a byte, if there is no bytes to send or receive, chooses next action.

Definition at line 455 of file spi.c.

References spi_buf, SPI_BUFSIZE, spi_bytesLeft, spi_currentState, SPI_FRAMEHDRSIZE, spi_pBuf, spi_process_message(), spi_receiveOverFlow, and SPI_SETMRDY.

Referenced by SPI_SRDYISR(), and SPI_USCIB0RX_ISR().

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Variable Documentation

spi_state spi_currentState

Current state of SPI.

Definition at line 228 of file spi.c.

Referenced by spi_busy(), spi_init(), spi_proccess(), spi_reqBegin(), spi_reqEnd(), spi_snd(), SPI_SRDYISR(), and SPI_USCIB0RX_ISR().