2 * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============
6 #include "Em_Message.h"
11 /* -------- INTERNAL FEATURES -------- */
13 #define LED_CONFIG() (P1DIR |= BIT6)
14 #define LED_ON() (P1OUT |= BIT6)
15 #define LED_OFF() (P1OUT &= ~BIT6)
16 #define LED_READ() (P1OUT & BIT6)
17 #define LED_TOGGLE() (P1OUT ^= BIT6)
19 #define CONNECTED_LED_CONFIG() (P1DIR |= BIT0)
20 #define CONNECTED_LED_ON() (P1OUT |= BIT0)
21 #define CONNECTED_LED_OFF() (P1OUT &= ~BIT0)
23 #define BUTTON_CONFIG() (P1DIR &= ~BIT3, P1REN |= BIT3, P1OUT |= BIT3, P1IES |= BIT3);
24 #define BUTTON_ENABLE() (P1IFG &= ~BIT3, P1IE |= BIT3)
25 #define BUTTON_PRESSED() (!(P1IN & BIT3))
26 #define BUTTON_DEBOUNCE_MSECS 100
28 #define DEBUG1_CONFIG() (P2DIR |= BIT3)
29 #define DEBUG1_ON() (P2OUT |= BIT3)
30 #define DEBUG1_OFF() (P2OUT &= ~BIT3)
32 #define DEBUG2_CONFIG() (P2DIR |= BIT4)
33 #define DEBUG2_ON() (P2OUT |= BIT4)
34 #define DEBUG2_OFF() (P2OUT &= ~BIT4)
36 #define EAP_RX_BUF UCA0RXBUF
37 #define EAP_TX_BUF UCA0TXBUF
39 #define EAP_RX_VECTOR USCIAB0RX_VECTOR
40 #define EAP_TX_VECTOR USCIAB0TX_VECTOR
41 #define EAP_TX_ACK_VECTOR PORT2_VECTOR
43 #define EAP_RX_ENABLE() (P1SEL |= BIT1, P1SEL2 |= BIT1)
44 #define EAP_RX_DISABLE() (P1SEL &= ~BIT1, P1SEL2 &= ~BIT1)
45 #define EAP_TX_ENABLE() (P1SEL |= BIT2, P1SEL2 |= BIT2)
46 #define EAP_TX_DISABLE() (P1SEL &= ~BIT2, P1SEL2 &= ~BIT2)
48 #define EAP_RX_ACK_CONFIG() (P2DIR |= BIT0)
49 #define EAP_RX_ACK_SET() (P2OUT |= BIT0)
50 #define EAP_RX_ACK_CLR() (P2OUT &= ~BIT0)
52 #define EAP_TX_ACK_CONFIG() (P2DIR &= ~BIT1, P2IES |= BIT1, P2IFG &= ~BIT1, P2IE |= BIT1)
53 #define EAP_TX_ACK_TST() (P2IFG & BIT1)
54 #define EAP_TX_ACK_CLR() (P2IFG &= ~BIT1)
56 #define EAP_RX_INT_CLR() (IFG2 &= ~UCA0RXIFG)
57 #define EAP_RX_INT_ENABLE() (IE2 |= UCA0RXIE)
58 #define EAP_TX_INT_CLR() (IFG2 &= ~UCA0TXIFG)
59 #define EAP_TX_INT_DISABLE() (IE2 &= ~UCA0TXIE)
60 #define EAP_TX_INT_ENABLE() (IE2 |= UCA0TXIE)
62 #define MCLK_TICKS_PER_MS 1000L
63 #define ACLK_TICKS_PER_SECOND 12000L
64 #define UART_WATCHDOG_PERIOD (ACLK_TICKS_PER_SECOND * 250) / 1000
66 #define UART_WATCH_DISABLE() (TA1CCTL1 = 0) // Turn off CCR1 Interrupt
67 #define UART_WATCH_ENABLE() (TA1CCR1 = TA1R + UART_WATCHDOG_PERIOD, TA1CCTL1 = CCIE) // Set CCR1, and Enable CCR1 Interrupt
70 #define DINT() __disable_interrupt()
71 #define EINT() __enable_interrupt()
73 #define SLEEP() _BIS_SR(LPM3_bits + GIE)
74 #define WAKEUP() _BIC_SR_IRQ(LPM3_bits)
77 #ifdef __TI_COMPILER_VERSION__
78 #define DINT() (_disable_interrupt())
79 #define EINT() (_enable_interrupt())
80 #define INTERRUPT interrupt
81 #define SLEEP() (__bis_SR_register(LPM3_bits + GIE))
82 #define WAKEUP() (__bic_SR_register_on_exit(LPM3_bits))
85 #define NUM_HANDLERS 3
87 #define BUTTON_HANDLER_ID 0
88 #define TICK_HANDLER_ID 1
89 #define DISPATCH_HANDLER_ID 2
91 static void buttonHandler(void);
92 static void postEvent(uint8_t handlerId);
94 static Hal_Handler appButtonHandler;
95 static volatile uint16_t handlerEvents = 0;
96 static uint16_t clockTick = 0;
97 static Hal_Handler handlerTab[NUM_HANDLERS];
100 /* -------- APP-HAL INTERFACE -------- */
102 void Hal_buttonEnable(Hal_Handler handler) {
103 handlerTab[BUTTON_HANDLER_ID] = buttonHandler;
104 appButtonHandler = handler;
110 void Hal_connected(void) {
114 void Hal_debugOn(uint8_t line) {
124 void Hal_debugOff(uint8_t line) {
134 void Hal_debugPulse(uint8_t line) {
146 void Hal_delay(uint16_t msecs) {
148 __delay_cycles(MCLK_TICKS_PER_MS);
152 void Hal_disconnected(void) {
156 void Hal_init(void) {
160 WDTCTL = WDTPW + WDTHOLD;
161 BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0;
162 if (CALBC1_1MHZ != 0xFF) {
164 BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */
165 DCOCTL = CALDCO_1MHZ;
167 BCSCTL1 |= XT2OFF + DIVA_0;
168 BCSCTL3 = XT2S_0 + LFXT1S_2 + XCAP_1;
174 CONNECTED_LED_CONFIG();
177 /* setup debug pins */
179 DEBUG1_CONFIG(); DEBUG1_OFF();
180 DEBUG2_CONFIG(); DEBUG2_OFF();
182 DEBUG1_ON(); DEBUG1_OFF();
185 TA1CTL = TASSEL_1 + MC_2; // ACLK, Continuous mode
186 UART_WATCH_DISABLE();
203 UCA0CTL1 = UCSSEL_2 + UCSWRST;
204 UCA0MCTL = UCBRF_0 + UCBRS_6;
206 UCA0CTL1 &= ~UCSWRST;
208 handlerTab[DISPATCH_HANDLER_ID] = Em_Message_dispatch;
211 void Hal_idleLoop(void) {
216 // atomically read/clear all handlerEvents
218 uint16_t events = handlerEvents;
221 if (events) { // dispatch all current events
225 for (id = 0, mask = 0x1; id < NUM_HANDLERS; id++, mask <<= 1) {
226 if ((events & mask) && handlerTab[id]) {
231 else { // await more events
237 void Hal_ledOn(void) {
241 void Hal_ledOff(void) {
245 bool Hal_ledRead(void) {
249 void Hal_ledToggle(void) {
253 void Hal_tickStart(uint16_t msecs, Hal_Handler handler) {
254 handlerTab[TICK_HANDLER_ID] = handler;
255 clockTick = (ACLK_TICKS_PER_SECOND * msecs) / 1000;
256 TA1CCR0 = TA1R + clockTick; // Set the CCR0 interrupt for msecs from now.
257 TA1CCTL0 = CCIE; // Enable the CCR0 interrupt
261 /* -------- SRT-HAL INTERFACE -------- */
263 uint8_t Em_Hal_lock(void) {
264 uint8_t key = _get_interrupt_state();
266 __disable_interrupt();
268 #ifdef __TI_COMPILER_VERSION__
269 _disable_interrupt();
274 void Em_Hal_reset(void) {
275 uint8_t key = Em_Hal_lock();
276 EAP_RX_ACK_CLR(); // suspend the MCM
278 EAP_RX_ACK_SET(); // reset the MCM
287 void Em_Hal_startSend() {
288 EAP_TX_BUF = Em_Message_startTx();
291 void Em_Hal_unlock(uint8_t key) {
292 _set_interrupt_state(key);
295 void Em_Hal_watchOff(void) {
296 UART_WATCH_DISABLE();
299 void Em_Hal_watchOn(void) {
304 /* -------- INTERNAL FUNCTIONS -------- */
306 static void buttonHandler(void) {
308 if (BUTTON_PRESSED() && appButtonHandler) {
313 static void postEvent(uint8_t handlerId) {
314 uint8_t key = Em_Hal_lock();
315 handlerEvents |= 1 << handlerId;
319 /* -------- INTERRUPT SERVICE ROUTINES -------- */
322 __attribute__((interrupt(PORT1_VECTOR)))
324 #ifdef __TI_COMPILER_VERSION__
325 #pragma vector=PORT1_VECTOR
327 INTERRUPT void buttonIsr(void) {
328 postEvent(BUTTON_HANDLER_ID);
334 __attribute__((interrupt(EAP_RX_VECTOR)))
336 #ifdef __TI_COMPILER_VERSION__
337 #pragma vector=EAP_RX_VECTOR
339 INTERRUPT void rxIsr(void) {
340 uint8_t b = EAP_RX_BUF;
341 Em_Message_startRx();
344 if (Em_Message_addByte(b)) {
345 postEvent(DISPATCH_HANDLER_ID);
351 __attribute__((interrupt(TIMER1_A0_VECTOR)))
353 #ifdef __TI_COMPILER_VERSION__
354 #pragma vector=TIMER1_A0_VECTOR
356 INTERRUPT void timerIsr(void) {
357 TA1CCR0 += clockTick;
358 postEvent(TICK_HANDLER_ID);
363 __attribute__((interrupt(EAP_TX_ACK_VECTOR)))
365 #ifdef __TI_COMPILER_VERSION__
366 #pragma vector=EAP_TX_ACK_VECTOR
368 INTERRUPT void txAckIsr(void) {
369 if (EAP_TX_ACK_TST()) {
371 if (Em_Message_getByte(&b)) {
380 __attribute__((interrupt(TIMER1_A1_VECTOR)))
382 #ifdef __TI_COMPILER_VERSION__
383 #pragma vector=TIMER1_A1_VECTOR
385 INTERRUPT void uartWatchdogIsr(void) {
388 UART_WATCH_DISABLE();
389 Em_Message_restart();