init.c

#include <msp430.h>
#include "init.h"
#include "defines.h"
#include "global.h"
#include "spi.h"
#include "flash.h"
#include "data_proc.h"

//---------------------------------------INITIALIZATIONS---------------------------

//SYSTEM INITIALIZATION
void init_system(void){
	WDTCTL = WDTPW + WDTHOLD;			// Stop watchdog timer

	ptr_vref_h = &vref_h;
	ptr_vref_l = &vref_l;
	ptr_vref_vcc = &vref_vcc;

	init_clk();							// init. internal clocks
	init_pulse();						// init. pulse for cap_meas
	init_ADC();							// init. ADC10
	init_spi();							// init. SPI module
	init_uart();
	init_led();							// init. LED
	//init_switch();					// init. switch for calibration
	init_flash();						// init. flash for write operation
	load_cal();							// load calibration data
	__delay_cycles(128);
}

//CLOCK INITIALIZATION
void init_clk(void){
	BCSCTL1 = CALBC1_8MHZ;				//config internal clocks DCO => 100kHz
	DCOCTL = CALDCO_8MHZ;
}

//FLASH INITIALIZATION
void init_flash(void){
	while(FCTL3 & BUSY){};				// wait till timing gen is ready
	FCTL2 = FWKEY + FSSEL_2 + FN0 + FN1 + FN2 + FN4; // Clk = SMCLK/24 => 333kHz
}

//PULSE INITIALIZATION
void init_pulse(void){
	P1DIR |= BIT2;						// config P1.2 as TA0.1
	P1SEL |= BIT2;

	TA0CCR0 = PULSE_PERIOD;         	// PULSE Period
	TA0CCR1 = PULSE_WIDTH;
	TACCTL1 = OUTMOD_7;             	// Toggle Mode
	TA0CTL = TASSEL_2 + MC_1;       	// SMCLK, up mode
	TA0CTL &= ~TAIE;

	/*
	P1DIR |= BIT1;                  	// config P1.1 as TA0.1
	P1SEL |= BIT1;

	TA0CCR0 = PULSE_PERIOD;				// PULSE Period
	TA0CCR1 = PULSE_WIDTH;
	TACCTL1 = OUTMOD_7;					// Toggle Mode
	TA0CTL = TASSEL_2 + MC_1;			// SMCLK, up mode
	TA0CTL &= ~TAIE;
	*/
}

//ADC10 INITIALIZATION
void init_ADC(void){
	ADC10CTL0 &= ~ADC10IE; 				// disable interrupts on ADC10
	ADC10AE0 = BIT0 + BIT1; 			// activate analog input config
}

//SWITCH INITIALIZATION
void init_switch(){
	P1DIR &= ~CAL_SW;					// P1.0 = input
	P1REN |= CAL_SW;					// Pullup/down resistor enabled
	P1OUT |= CAL_SW;					// Pin is pulled enabled
	P1IES |= CAL_SW;					// rising edge
	P1IE |= CAL_SW;						// interrupt enable
	P1IFG &= ~CAL_SW;					// clear interrupt flag
}

//LED INITIALIZATION
void init_led(void){
	P1DIR |= LED_GR + LED_YE;			// conifg LED output pins
	P1OUT &= ~LED_GR + ~LED_YE;			// turn off LEDs
}

//SPI INITIALIZATION
void init_spi(void){
	//CS
	P4DIR |= CS1;
	P4OUT |= CS1;

	P3SEL |= BIT3 + BIT1;				// P3.3,1 USCI_B0 option select
	UCB0CTL0 |= UCMSB + UCMST + UCSYNC + UCCKPH;		// 3-pin, 8-bit SPI mstr, MSB 1st
	UCB0CTL1 |= UCSSEL_2;				// SMCLK
	UCB0BR0 = 0x02;
	UCB0BR1 = 0;
	UCB0CTL1 &= ~UCSWRST;				// **Initialize USCI state machine**

}

//UART INITIALIZATION
void init_uart(void){
	P3SEL |= 0x30;						// P3.4,5 = USCI_A0 TXD/RXD
	UCA0CTL1 |= UCSSEL_2;				// SMCLK
	UCA0BR0 = 0x41;						// 8MHz 9600
	UCA0BR1 = 0x03; 					// 8MHz 9600
	UCA0MCTL = UCBRS0;					// Modulation UCBRSx = 1
	UCA0CTL1 &= ~UCSWRST;				// **Initialize USCI state machine**
	IE2 |= UCA0RXIE;					// Enable USCI_A0 RX interrupt
}

//LOAD CALIBRATION DATA
void load_cal(void){
	unsigned char spi_volt_data;
	unsigned char *ptr_spi_volt_data;
	ptr_spi_volt_data = &spi_volt_data;

	// Set Vref+ to max to be able to use internal Vref2.5
	char maxOUT = 255;                       		// set Vref+ to Vcc
	spi_send(DAC_VREF_H, maxOUT);

	vref_l = read_flash_ref(FLASH_VREF_L);         // load calibration
	vref_h = read_flash_ref(FLASH_VREF_H);         // load calibration
	vref_vcc = read_flash_ref(FLASH_VCC);          // load calibration

}