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发表于 2012-5-8 09:34:05
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给你一个闪LED灯的，在launchpad上跑的。用户手册，数据手册到TI网站上下载吧，我就不浪费网站资源了。PS,别说你不读英文的文档
/******************************************************************************
* MSP-EXP430G2-LaunchPad User Experience Application
*
* 1. Device starts up in LPM3 + blinking LED to indicate device is alive
* + Upon first button press, device transitions to application mode
* 2. Application Mode
* + Continuously sample ADC Temp Sensor channel, compare result against
* initial value
* + Set PWM based on measured ADC offset: Red LED for positive offset, Green
* LED for negative offset
* + Transmit temperature value via TimerA UART to PC
* + Button Press --> Calibrate using current temperature
* Send character '? via UART, notifying PC
******************************************************************************/
#include "msp430x20x2.h"
#define LED0 BIT0
#define LED1 BIT6
#define LED_DIR P1DIR
#define LED_OUT P1OUT
#define BUTTON BIT3
#define BUTTON_OUT P1OUT
#define BUTTON_DIR P1DIR
#define BUTTON_IN P1IN
#define BUTTON_IE P1IE
#define BUTTON_IES P1IES
#define BUTTON_IFG P1IFG
#define BUTTON_REN P1REN
#define TXD BIT1 // TXD on P1.1
#define RXD BIT2 // RXD on P1.2
#define APP_STANDBY_MODE 0
#define APP_APPLICATION_MODE 1
#define TIMER_PWM_MODE 0
#define TIMER_UART_MODE 1
#define TIMER_PWM_PERIOD 10
#define TIMER_PWM_OFFSET 20
#define TEMP_SAME 0
#define TEMP_HOT 1
#define TEMP_COLD 2
#define TEMP_THRESHOLD 5
// Conditions for 9600/4=2400 Baud SW UART, SMCLK = 1MHz
#define Bitime_5 0x05*4 // ~ 0.5 bit length + small adjustment
#define Bitime 13*4//0x0D
#define UART_UPDATE_INTERVAL 1000
unsigned char BitCnt;
unsigned char applicationMode = APP_STANDBY_MODE;
unsigned char timerMode = TIMER_PWM_MODE;
unsigned char tempMode;
unsigned char calibrateUpdate = 0;
unsigned char tempPolarity = TEMP_SAME;
unsigned int TXByte;
/* Using an 8-value moving average filter on sampled ADC values */
long tempMeasured[8];
unsigned char tempMeasuredPosition=0;
long tempAverage;
long tempCalibrated, tempDifference;
void InitializeLeds(void);
void InitializeButton(void);
void PreApplicationMode(void); // Blinks LED, waits for button press
void ConfigureAdcTempSensor(void);
void ConfigureTimerPwm(void);
void ConfigureTimerUart(void);
void Transmit(void);
void InitializeClocks(void);
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
InitializeClocks();
InitializeButton();
InitializeLeds();
PreApplicationMode(); // Blinks LEDs, waits for button press
/* Application Mode begins */
applicationMode = APP_APPLICATION_MODE;
ConfigureTimerPwm();
__enable_interrupt(); // Enable interrupts.
/* Main Application Loop */
while(1)
{
}
}
void PreApplicationMode(void)
{
LED_DIR |= LED0 + LED1;
LED_OUT |= LED0; // To enable the LED toggling effect
LED_OUT &= ~LED1;
BCSCTL1 |= DIVA_1; // ACLK/2
BCSCTL3 |= LFXT1S_2; // ACLK = VLO
TACCR0 = 1200; //
TACTL = TASSEL_1 | MC_1; // TACLK = SMCLK, Up mode.
TACCTL1 = CCIE + OUTMOD_3; // TACCTL1 Capture Compare
TACCR1 = 600;
__bis_SR_register(LPM3_bits + GIE); // LPM0 with interrupts enabled
}
void ConfigureTimerPwm(void)
{
timerMode = TIMER_PWM_MODE;
TACCR0 = TIMER_PWM_PERIOD; //
TACTL = TASSEL_2 | MC_1; // TACLK = SMCLK, Up mode.
TACCTL0 = CCIE;
TACCTL1 = CCIE + OUTMOD_3; // TACCTL1 Capture Compare
TACCR1 = 1;
}
// Timer A0 interrupt service routine
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A (void)
{
{
if (tempPolarity == TEMP_HOT)
LED_OUT |= LED1;
if (tempPolarity == TEMP_COLD)
LED_OUT |= LED0;
TACCTL0 &= ~CCIFG;
}
}
#pragma vector=TIMERA1_VECTOR
__interrupt void ta1_isr(void)
{
TACCTL1 &= ~CCIFG;
LED_OUT ^= (LED0 + LED1);
}
void InitializeClocks(void)
{
BCSCTL1 = CALBC1_1MHZ; // Set range
DCOCTL = CALDCO_1MHZ;
BCSCTL2 &= ~(DIVS_3); // SMCLK = DCO / 8 = 1MHz
}
void InitializeButton(void) // Configure Push Button
{
BUTTON_DIR &= ~BUTTON;
BUTTON_OUT |= BUTTON;
BUTTON_REN |= BUTTON;
BUTTON_IES |= BUTTON;
BUTTON_IFG &= ~BUTTON;
BUTTON_IE |= BUTTON;
}
void InitializeLeds(void)
{
LED_DIR |= LED0 + LED1;
LED_OUT &= ~(LED0 + LED1);
}
/* *************************************************************
* Port Interrupt for Button Press
* 1. During standby mode: to exit and enter application mode
* 2. During application mode: to recalibrate temp sensor
* *********************************************************** */
#pragma vector=PORT1_VECTOR
__interrupt void PORT1_ISR(void)
{
BUTTON_IFG = 0;
BUTTON_IE &= ~BUTTON; /* Debounce */
WDTCTL = WDT_ADLY_250;
IFG1 &= ~WDTIFG; /* clear interrupt flag */
IE1 |= WDTIE;
if (applicationMode == APP_APPLICATION_MODE)
{
tempCalibrated = tempAverage;
calibrateUpdate = 1;
}
else
{
applicationMode = APP_APPLICATION_MODE; // Switch from STANDBY to APPLICATION MODE
__bic_SR_register_on_exit(LPM3_bits);
}
}
#pragma vector=WDT_VECTOR
__interrupt void WDT_ISR(void)
{
IE1 &= ~WDTIE; /* disable interrupt */
IFG1 &= ~WDTIFG; /* clear interrupt flag */
WDTCTL = WDTPW + WDTHOLD; /* put WDT back in hold state */
BUTTON_IE |= BUTTON; /* Debouncing complete */
}
// ADC10 interrupt service routine
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR (void)
{
__bic_SR_register_on_exit(CPUOFF); // Return to active mode
}
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