hal_spi.c File Reference

SPI configuration. More...

#include "cleon_conf.h"
#include "app_define.h"
#include "sys_define.h"
#include "hal_define.h"
#include "fs_define.h"

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Functions
void	HAL_SPI_Init (void)
	Initializing SPI.

Detailed Description

SPI configuration.

Definition in file hal_spi.c.

Function Documentation

void HAL_SPI_Init

(

void

)

Initializing SPI.

Returns

void

Parameters

void

Definition at line 21 of file hal_spi.c.

{ 
    //Initialize UCB1 for SPI Master operation
    UCB1CTL1 |= UCSWRST;                                    //Put state machine in reset
    UCB1CTL0  = UCCKPL | UCMSB | UCMST | UCMODE_0 | UCSYNC; //3-pin, 8-bit SPI master

    UCB1CTL1 = UCSWRST | UCSSEL_2;                          //Use SMCLK, keep RESET
    UCB1BR0  = 31;                                          //Initial SPI clock must be <400kHz
    UCB1BR1  = 0;                                           //f_UCxCLK = 12MHz/31 = 387kHz
    UCB1CTL1 &= ~UCSWRST;                                   //Release USCI state machine
    UCB1IFG  &= ~UCRXIFG;
}

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