2 * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============
6 #include "Em_Message.h"
11 /* -------- INTERNAL FEATURES -------- */
13 #define GREEN_LED_CONFIG() (P1DIR |= BIT6)
14 #define GREEN_LED_ON() (P1OUT |= BIT6)
15 #define GREEN_LED_OFF() (P1OUT &= ~BIT6)
16 #define GREEN_LED_READ() (P1OUT & BIT6)
17 #define GREEN_LED_TOGGLE() (P1OUT ^= BIT6)
19 #define RED_LED_CONFIG() (P1DIR |= BIT0)
20 #define RED_LED_ON() (P1OUT |= BIT0)
21 #define RED_LED_OFF() (P1OUT &= ~BIT0)
22 #define RED_LED_READ() (P1OUT & BIT0)
23 #define RED_LED_TOGGLE() (P1OUT ^= BIT0)
25 #define BUTTON_CONFIG() (P1DIR &= ~BIT3, P1REN |= BIT3, P1OUT |= BIT3, P1IES |= BIT3);
26 #define BUTTON_ENABLE() (P1IFG &= ~BIT3, P1IE |= BIT3)
27 #define BUTTON_PRESSED() (!(P1IN & BIT3))
28 #define BUTTON_DEBOUNCE_MSECS 100
30 #define DEBUG1_CONFIG() (P2DIR |= BIT3)
31 #define DEBUG1_ON() (P2OUT |= BIT3)
32 #define DEBUG1_OFF() (P2OUT &= ~BIT3)
34 #define DEBUG2_CONFIG() (P2DIR |= BIT4)
35 #define DEBUG2_ON() (P2OUT |= BIT4)
36 #define DEBUG2_OFF() (P2OUT &= ~BIT4)
38 #define EAP_RX_BUF UCA0RXBUF
39 #define EAP_TX_BUF UCA0TXBUF
41 #define EAP_RX_VECTOR USCIAB0RX_VECTOR
42 #define EAP_TX_VECTOR USCIAB0TX_VECTOR
43 #define EAP_TX_ACK_VECTOR PORT2_VECTOR
45 #define EAP_RX_ENABLE() (P1SEL |= BIT1, P1SEL2 |= BIT1)
46 #define EAP_RX_DISABLE() (P1SEL &= ~BIT1, P1SEL2 &= ~BIT1)
47 #define EAP_TX_ENABLE() (P1SEL |= BIT2, P1SEL2 |= BIT2)
48 #define EAP_TX_DISABLE() (P1SEL &= ~BIT2, P1SEL2 &= ~BIT2)
50 #define EAP_RX_ACK_CONFIG() (P2DIR |= BIT0)
51 #define EAP_RX_ACK_SET() (P2OUT |= BIT0)
52 #define EAP_RX_ACK_CLR() (P2OUT &= ~BIT0)
54 #define EAP_TX_ACK_CONFIG() (P2DIR &= ~BIT1, P2IES |= BIT1, P2IFG &= ~BIT1, P2IE |= BIT1)
55 #define EAP_TX_ACK_TST() (P2IFG & BIT1)
56 #define EAP_TX_ACK_CLR() (P2IFG &= ~BIT1)
58 #define EAP_RX_INT_CLR() (IFG2 &= ~UCA0RXIFG)
59 #define EAP_RX_INT_ENABLE() (IE2 |= UCA0RXIE)
60 #define EAP_TX_INT_CLR() (IFG2 &= ~UCA0TXIFG)
61 #define EAP_TX_INT_DISABLE() (IE2 &= ~UCA0TXIE)
62 #define EAP_TX_INT_ENABLE() (IE2 |= UCA0TXIE)
64 #define MCLK_TICKS_PER_MS 1000L
65 #define ACLK_TICKS_PER_SECOND 12000L
66 #define UART_WATCHDOG_PERIOD (ACLK_TICKS_PER_SECOND * 250) / 1000
68 #define UART_WATCH_DISABLE() (TA1CCTL1 = 0) // Turn off CCR1 Interrupt
69 #define UART_WATCH_ENABLE() (TA1CCR1 = TA1R + UART_WATCHDOG_PERIOD, TA1CCTL1 = CCIE) // Set CCR1, and Enable CCR1 Interrupt
72 #define DINT() __disable_interrupt()
73 #define EINT() __enable_interrupt()
75 #define SLEEP() _BIS_SR(LPM3_bits + GIE)
76 #define WAKEUP() _BIC_SR_IRQ(LPM3_bits)
79 #ifdef __TI_COMPILER_VERSION__
80 #define DINT() (_disable_interrupt())
81 #define EINT() (_enable_interrupt())
82 #define INTERRUPT interrupt
83 #define SLEEP() (__bis_SR_register(LPM3_bits + GIE))
84 #define WAKEUP() (__bic_SR_register_on_exit(LPM3_bits))
87 #define NUM_HANDLERS 3
89 #define BUTTON_HANDLER_ID 0
90 #define TICK_HANDLER_ID 1
91 #define DISPATCH_HANDLER_ID 2
93 int32_t buttonCnt = 0;
95 static void buttonHandler(void);
96 static void postEvent(uint8_t handlerId);
98 static Hal_Handler appButtonHandler;
99 static volatile uint16_t handlerEvents = 0;
100 static uint16_t clockTick = 0;
101 static Hal_Handler handlerTab[NUM_HANDLERS];
104 /* -------- APP-HAL INTERFACE -------- */
106 void Hal_buttonEnable(Hal_Handler handler) {
107 handlerTab[BUTTON_HANDLER_ID] = buttonHandler;
108 appButtonHandler = handler;
114 void Hal_connected(void) {
117 void Hal_debugOn(uint8_t line) {
127 void Hal_debugOff(uint8_t line) {
137 void Hal_debugPulse(uint8_t line) {
149 void Hal_delay(uint16_t msecs) {
151 __delay_cycles(MCLK_TICKS_PER_MS);
155 void Hal_disconnected(void) {
158 void Hal_init(void) {
162 WDTCTL = WDTPW + WDTHOLD;
163 BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0;
164 if (CALBC1_1MHZ != 0xFF) {
166 BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */
167 DCOCTL = CALDCO_1MHZ;
169 BCSCTL1 |= XT2OFF + DIVA_0;
170 BCSCTL3 = XT2S_0 + LFXT1S_2 + XCAP_1;
179 /* setup debug pins */
181 DEBUG1_CONFIG(); DEBUG1_OFF();
182 DEBUG2_CONFIG(); DEBUG2_OFF();
184 DEBUG1_ON(); DEBUG1_OFF();
187 TA1CTL = TASSEL_1 + MC_2; // ACLK, Continuous mode
188 UART_WATCH_DISABLE();
205 UCA0CTL1 = UCSSEL_2 + UCSWRST;
206 UCA0MCTL = UCBRF_0 + UCBRS_6;
208 UCA0CTL1 &= ~UCSWRST;
210 handlerTab[DISPATCH_HANDLER_ID] = Em_Message_dispatch;
213 void Hal_idleLoop(void) {
218 // atomically read/clear all handlerEvents
220 uint16_t events = handlerEvents;
223 if (events) { // dispatch all current events
227 for (id = 0, mask = 0x1; id < NUM_HANDLERS; id++, mask <<= 1) {
228 if ((events & mask) && handlerTab[id]) {
233 else { // await more events
239 void Hal_greenLedOn(void) {
243 void Hal_greenLedOff(void) {
247 bool Hal_greenLedRead(void) {
248 return GREEN_LED_READ();
251 void Hal_greenLedToggle(void) {
255 void Hal_redLedOn(void) {
259 void Hal_redLedOff(void) {
263 bool Hal_redLedRead(void) {
264 return RED_LED_READ();
267 void Hal_redLedToggle(void) {
271 void Hal_tickStart(uint16_t msecs, Hal_Handler handler) {
272 handlerTab[TICK_HANDLER_ID] = handler;
273 clockTick = (ACLK_TICKS_PER_SECOND * msecs) / 1000;
274 TA1CCR0 = TA1R + clockTick; // Set the CCR0 interrupt for msecs from now.
275 TA1CCTL0 = CCIE; // Enable the CCR0 interrupt
279 /* -------- SRT-HAL INTERFACE -------- */
281 uint8_t Em_Hal_lock(void) {
282 uint8_t key = _get_interrupt_state();
284 __disable_interrupt();
286 #ifdef __TI_COMPILER_VERSION__
287 _disable_interrupt();
292 void Em_Hal_reset(void) {
293 uint8_t key = Em_Hal_lock();
294 EAP_RX_ACK_CLR(); // suspend the MCM
296 EAP_RX_ACK_SET(); // reset the MCM
305 void Em_Hal_startSend() {
306 EAP_TX_BUF = Em_Message_startTx();
309 void Em_Hal_unlock(uint8_t key) {
310 _set_interrupt_state(key);
313 void Em_Hal_watchOff(void) {
314 UART_WATCH_DISABLE();
317 void Em_Hal_watchOn(void) {
322 /* -------- INTERNAL FUNCTIONS -------- */
324 static void buttonHandler(void) {
326 if (BUTTON_PRESSED() && appButtonHandler) {
331 static void postEvent(uint8_t handlerId) {
332 uint8_t key = Em_Hal_lock();
333 handlerEvents |= 1 << handlerId;
337 /* -------- INTERRUPT SERVICE ROUTINES -------- */
340 __attribute__((interrupt(PORT1_VECTOR)))
342 #ifdef __TI_COMPILER_VERSION__
343 #pragma vector=PORT1_VECTOR
345 INTERRUPT void buttonIsr(void) {
347 postEvent(BUTTON_HANDLER_ID);
353 __attribute__((interrupt(EAP_RX_VECTOR)))
355 #ifdef __TI_COMPILER_VERSION__
356 #pragma vector=EAP_RX_VECTOR
358 INTERRUPT void rxIsr(void) {
359 uint8_t b = EAP_RX_BUF;
360 Em_Message_startRx();
363 if (Em_Message_addByte(b)) {
364 postEvent(DISPATCH_HANDLER_ID);
370 __attribute__((interrupt(TIMER1_A0_VECTOR)))
372 #ifdef __TI_COMPILER_VERSION__
373 #pragma vector=TIMER1_A0_VECTOR
375 INTERRUPT void timerIsr(void) {
376 TA1CCR0 += clockTick;
377 postEvent(TICK_HANDLER_ID);
382 __attribute__((interrupt(EAP_TX_ACK_VECTOR)))
384 #ifdef __TI_COMPILER_VERSION__
385 #pragma vector=EAP_TX_ACK_VECTOR
387 INTERRUPT void txAckIsr(void) {
388 if (EAP_TX_ACK_TST()) {
390 if (Em_Message_getByte(&b)) {
399 __attribute__((interrupt(TIMER1_A1_VECTOR)))
401 #ifdef __TI_COMPILER_VERSION__
402 #pragma vector=TIMER1_A1_VECTOR
404 INTERRUPT void uartWatchdogIsr(void) {
407 UART_WATCH_DISABLE();
408 Em_Message_restart();