spi_if.c File Reference

this file contains the SPI functions and the CRC calculation More...

#include "msp430.h"
#include "main.h"
#include "spi_if.h"

Go to the source code of this file.

Functions
unsigned char	calculate_crc (unsigned char *buffer, unsigned char buffer_lenght)
	Local functions .
void	init_spi (void)
	Global functions .
short	spi_write_reg (unsigned char dev_addr, unsigned char reg_addr, unsigned char data)
	Function Name: spi_write_reg .
short	spi_read_reg (unsigned char dev_addr, unsigned char reg_addr, short elem_num, unsigned char discard_crc, unsigned char *pData)
	Function Name: spi_read_reg.
Variables
const unsigned char	spi_regs_rw_mask []
	constants .
const unsigned char	CrcTable []

---

Detailed Description

this file contains the SPI functions and the CRC calculation

Author:

Texas Instruments, Inc

Date:

November 2010

Version:

1.0 Initial version

Note:

Built with IAR for MSP430 Version: 5.10

Definition in file spi_if.c.

---

Function Documentation

unsigned char calculate_crc	(	unsigned char *	buffer,
		unsigned char	buffer_lenght
	)

Local functions .

Function Name: calculate_crc . Description : calculates CRC coming/going to the 'PL536 device.

Parameters:

parameters

: buffer, buffer size

Returns:

Value : crc

Definition at line 327 of file spi_if.c.

void init_spi

(

void

)

Global functions .

Function Name: init_spi . Description : Initializes the SPI module and the SPI pins .

Parameters:

parameters

: none

Returns:

Value : none

Definition at line 134 of file spi_if.c.

short spi_read_reg	(	unsigned char	dev_addr,
		unsigned char	reg_addr,
		short	elem_num,
		unsigned char	discard_crc,
		unsigned char *	pData
	)

Function Name: spi_read_reg.

External functions declaration .

Description : Read elem_num bytes from SPI reg of the attached device, read data is returned in pData, returns number of received bytes (including CRC as last pData byte if required) .

Parameters:

parameters

: device address, register address, num of bytes, CRC enable/disable, receiver buffer .

Returns:

Value : number of bytes received

Definition at line 224 of file spi_if.c.

short spi_write_reg	(	unsigned char	dev_addr,
		unsigned char	reg_addr,
		unsigned char	data
	)

Function Name: spi_write_reg .

Description : Writes just 1 byte into the specified bq pack register.

Parameters:

parameters

: device address, register address, data

Returns:

Value : return the number of bytes sent

Definition at line 163 of file spi_if.c.

---

Variable Documentation

const unsigned char spi_regs_rw_mask[]

Initial value:

 
{
  0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,
  0x1,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
  0x3,0x3,0x1,0x1,0x1,0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
  0x3,0x3,0x3,0x3,0x3,0x0,0x0,0x0,0x0,0x0,0x3,0x3,0x2,0x3,0x0,0x3,
  0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x1,0x1,0x1,0x1,0x0,0x0,0x0,0x0
}

constants .

Definition at line 79 of file spi_if.c.