--- /dev/null
+/*
+ * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============
+ */
+
+#include "Hal.h"
+#include "Em_Message.h"
+
+#include <msp430.h>
+
+
+/* -------- INTERNAL FEATURES -------- */
+
+#define GREEN_LED_CONFIG() (P1DIR |= BIT6)
+#define GREEN_LED_ON() (P1OUT |= BIT6)
+#define GREEN_LED_OFF() (P1OUT &= ~BIT6)
+#define GREEN_LED_READ() (P1OUT & BIT6)
+#define GREEN_LED_TOGGLE() (P1OUT ^= BIT6)
+
+#define RED_LED_CONFIG() (P1DIR |= BIT0)
+#define RED_LED_ON() (P1OUT |= BIT0)
+#define RED_LED_OFF() (P1OUT &= ~BIT0)
+#define RED_LED_READ() (P1OUT & BIT0)
+#define RED_LED_TOGGLE() (P1OUT ^= BIT0)
+
+#define GPIO_CONFIG(mask) (P1DIR &= ~mask, P1REN |= mask, P1OUT |= mask, P1IES |= mask);
+#define GPIO_ENABLE(mask) (P1IFG &= ~mask, P1IE |= mask)
+#define GPIO_DISABLE(mask) (P1IE &= ~mask, P1IFG &= ~mask)
+#define GPIO_FIRED(mask) (P1IFG & mask)
+#define GPIO_LOW(mask) (!(P1IN & mask))
+#define GPIO_DEBOUNCE_MSECS 100
+
+#define DEBUG1_CONFIG() (P2DIR |= BIT3)
+#define DEBUG1_ON() (P2OUT |= BIT3)
+#define DEBUG1_OFF() (P2OUT &= ~BIT3)
+
+#define DEBUG2_CONFIG() (P2DIR |= BIT4)
+#define DEBUG2_ON() (P2OUT |= BIT4)
+#define DEBUG2_OFF() (P2OUT &= ~BIT4)
+
+#define EAP_RX_BUF UCA0RXBUF
+#define EAP_TX_BUF UCA0TXBUF
+
+#define EAP_RX_VECTOR USCIAB0RX_VECTOR
+#define EAP_TX_VECTOR USCIAB0TX_VECTOR
+#define EAP_TX_ACK_VECTOR PORT2_VECTOR
+
+#define EAP_RX_ENABLE() (P1SEL |= BIT1, P1SEL2 |= BIT1)
+#define EAP_RX_DISABLE() (P1SEL &= ~BIT1, P1SEL2 &= ~BIT1)
+#define EAP_TX_ENABLE() (P1SEL |= BIT2, P1SEL2 |= BIT2)
+#define EAP_TX_DISABLE() (P1SEL &= ~BIT2, P1SEL2 &= ~BIT2)
+
+#define EAP_RX_ACK_CONFIG() (P2DIR |= BIT0)
+#define EAP_RX_ACK_SET() (P2OUT |= BIT0)
+#define EAP_RX_ACK_CLR() (P2OUT &= ~BIT0)
+
+#define EAP_TX_ACK_CONFIG() (P2DIR &= ~BIT1, P2IES |= BIT1, P2IFG &= ~BIT1, P2IE |= BIT1)
+#define EAP_TX_ACK_TST() (P2IFG & BIT1)
+#define EAP_TX_ACK_CLR() (P2IFG &= ~BIT1)
+
+#define EAP_RX_INT_CLR() (IFG2 &= ~UCA0RXIFG)
+#define EAP_RX_INT_ENABLE() (IE2 |= UCA0RXIE)
+#define EAP_TX_INT_CLR() (IFG2 &= ~UCA0TXIFG)
+#define EAP_TX_INT_DISABLE() (IE2 &= ~UCA0TXIE)
+#define EAP_TX_INT_ENABLE() (IE2 |= UCA0TXIE)
+
+#define MCLK_TICKS_PER_MS 1000L
+#define ACLK_TICKS_PER_SECOND 1500L /* was 12000L with divider /1 */
+#define UART_WATCHDOG_PERIOD (ACLK_TICKS_PER_SECOND * 250) / 1000
+
+#define UART_WATCH_DISABLE() (TA1CCTL1 = 0) // Turn off CCR1 Interrupt
+#define UART_WATCH_ENABLE() (TA1CCR1 = TA1R + UART_WATCHDOG_PERIOD, TA1CCTL1 = CCIE) // Set CCR1, and Enable CCR1 Interrupt
+
+#ifdef __GNUC__
+#define DINT() __disable_interrupt()
+#define EINT() __enable_interrupt()
+#define INTERRUPT
+#define SLEEP() _BIS_SR(LPM3_bits + GIE)
+#define WAKEUP() _BIC_SR_IRQ(LPM3_bits)
+#endif
+
+#ifdef __TI_COMPILER_VERSION__
+#define DINT() (_disable_interrupt())
+#define EINT() (_enable_interrupt())
+#define INTERRUPT interrupt
+#define SLEEP() (__bis_SR_register(LPM3_bits + GIE))
+#define WAKEUP() (__bic_SR_register_on_exit(LPM3_bits))
+#endif
+
+#define NUM_HANDLERS 5
+
+#define EVENT3_HANDLER_ID 0
+#define EVENT4_HANDLER_ID 1
+#define EVENT5_HANDLER_ID 2
+#define TICK_HANDLER_ID 3
+#define DISPATCH_HANDLER_ID 4
+
+static void gpioHandler(uint8_t id);
+static void postEvent(uint8_t handlerId);
+
+static Hal_Handler appGpioHandler;
+static volatile uint16_t handlerEvents = 0;
+static uint16_t clockTick = 0;
+static Hal_Handler handlerTab[NUM_HANDLERS];
+
+
+/* -------- APP-HAL INTERFACE -------- */
+
+void Hal_gpioEnable(Hal_Handler handler) {
+ uint8_t id;
+ uint16_t mask;
+
+ for (id = 0, mask = BIT3; id < 3; id++, mask <<= 1) {
+ handlerTab[id] = gpioHandler;
+ appGpioHandler = handler;
+ (P1DIR &= ~mask, P1REN |= mask, P1OUT |= mask, P1IES |= mask);
+ Hal_delay(100);
+ (P1IFG &= ~mask, P1IE |= mask);
+ }
+}
+
+void Hal_connected(void) {
+}
+
+void Hal_debugOn(uint8_t line) {
+ switch (line) {
+ case 1:
+ DEBUG1_ON();
+ break;
+ case 2:
+ DEBUG2_ON();
+ }
+}
+
+void Hal_debugOff(uint8_t line) {
+ switch (line) {
+ case 1:
+ DEBUG1_OFF();
+ break;
+ case 2:
+ DEBUG2_OFF();
+ }
+}
+
+void Hal_debugPulse(uint8_t line) {
+ switch (line) {
+ case 1:
+ DEBUG1_ON();
+ DEBUG1_OFF();
+ break;
+ case 2:
+ DEBUG2_ON();
+ DEBUG2_OFF();
+ }
+}
+
+void Hal_delay(uint16_t msecs) {
+ while (msecs--) {
+ __delay_cycles(MCLK_TICKS_PER_MS);
+ }
+}
+
+void Hal_disconnected(void) {
+}
+
+void Hal_init(void) {
+
+ /* setup clocks */
+
+ WDTCTL = WDTPW + WDTHOLD;
+ /* MCLK = DCOCLK */
+ /* MCLK divider = /1 */
+ /* SMCLK divider = /1 */
+ BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0;
+ if (CALBC1_1MHZ != 0xFF) {
+ DCOCTL = 0x00;
+ BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */
+ DCOCTL = CALDCO_1MHZ;
+ }
+ /* XT2 is off (Not used for MCLK/SMCLK) */
+ /* ACLK divider = /8 */
+ BCSCTL1 |= XT2OFF + DIVA_3;
+ /* XT2 range = 0.4 - 1 MHz */
+ /* LFXT1 range/VLO = VLOCLK (or 3-16 MHz if XTS=1) */
+ /* Capacitor 6 pF */
+ BCSCTL3 = XT2S_0 + LFXT1S_2 + XCAP_1;
+
+ /* setup LEDs */
+
+ GREEN_LED_CONFIG();
+ GREEN_LED_OFF();
+ RED_LED_CONFIG();
+ RED_LED_OFF();
+
+ /* setup debug pins */
+
+ DEBUG1_CONFIG(); DEBUG1_OFF();
+ DEBUG2_CONFIG(); DEBUG2_OFF();
+
+ DEBUG1_ON(); DEBUG1_OFF();
+
+ /* setup TimerA1 */
+ TA1CTL = TASSEL_1 + MC_2; // ACLK, Continuous mode
+ UART_WATCH_DISABLE();
+
+ /* setup UART */
+
+ UCA0CTL1 |= UCSWRST;
+
+ EAP_RX_ENABLE();
+ EAP_TX_ENABLE();
+
+ EAP_RX_ACK_CONFIG();
+ EAP_RX_ACK_SET();
+
+ EAP_TX_ACK_CONFIG();
+
+ // suspend the MCM
+ EAP_RX_ACK_CLR();
+
+ UCA0CTL1 = UCSSEL_2 + UCSWRST;
+ UCA0MCTL = UCBRF_0 + UCBRS_6;
+ UCA0BR0 = 8;
+ UCA0CTL1 &= ~UCSWRST;
+
+ handlerTab[DISPATCH_HANDLER_ID] = Em_Message_dispatch;
+}
+
+void Hal_idleLoop(void) {
+
+ EINT();
+ for (;;) {
+
+ // atomically read/clear all handlerEvents
+ DINT();
+ uint16_t events = handlerEvents;
+ handlerEvents = 0;
+
+ if (events) { // dispatch all current events
+ EINT();
+ uint16_t mask;
+ uint8_t id;
+ for (id = 0, mask = 0x1; id < NUM_HANDLERS; id++, mask <<= 1) {
+ if ((events & mask) && handlerTab[id]) {
+ handlerTab[id](id);
+ }
+ }
+ }
+ else { // await more events
+ SLEEP();
+ }
+ }
+}
+
+void Hal_greenLedOn(void) {
+ GREEN_LED_ON();
+}
+
+void Hal_greenLedOff(void) {
+ GREEN_LED_OFF();
+}
+
+bool Hal_greenLedRead(void) {
+ return GREEN_LED_READ();
+}
+
+void Hal_greenLedToggle(void) {
+ GREEN_LED_TOGGLE();
+}
+
+void Hal_redLedOn(void) {
+ RED_LED_ON();
+}
+
+void Hal_redLedOff(void) {
+ RED_LED_OFF();
+}
+
+bool Hal_redLedRead(void) {
+ return RED_LED_READ();
+}
+
+void Hal_redLedToggle(void) {
+ RED_LED_TOGGLE();
+}
+
+void Hal_tickStart(uint16_t msecs, Hal_Handler handler) {
+ handlerTab[TICK_HANDLER_ID] = handler;
+ clockTick = (ACLK_TICKS_PER_SECOND * msecs) / 1000;
+ TA1CCR0 = TA1R + clockTick; // Set the CCR0 interrupt for msecs from now.
+ TA1CCTL0 = CCIE; // Enable the CCR0 interrupt
+}
+
+void Hal_tickStop(void) {
+ handlerTab[TICK_HANDLER_ID] = 0;
+ TA1CCR0 = 0;
+ TA1CCTL0 = 0;
+}
+
+/* -------- SRT-HAL INTERFACE -------- */
+
+uint8_t Em_Hal_lock(void) {
+ uint8_t key = _get_interrupt_state();
+ #ifdef __GNUC__
+ __disable_interrupt();
+ #endif
+ #ifdef __TI_COMPILER_VERSION__
+ _disable_interrupt();
+ #endif
+ return key;
+}
+
+void Em_Hal_reset(void) {
+ uint8_t key = Em_Hal_lock();
+ EAP_RX_ACK_CLR(); // suspend the MCM
+ Hal_delay(100);
+ EAP_RX_ACK_SET(); // reset the MCM
+ Hal_delay(500);
+ EAP_RX_INT_CLR();
+ EAP_TX_INT_CLR();
+ EAP_TX_ACK_CLR();
+ EAP_RX_INT_ENABLE();
+ Em_Hal_unlock(key);
+}
+
+void Em_Hal_startSend() {
+ EAP_TX_BUF = Em_Message_startTx();
+}
+
+void Em_Hal_unlock(uint8_t key) {
+ _set_interrupt_state(key);
+}
+
+void Em_Hal_watchOff(void) {
+ UART_WATCH_DISABLE();
+}
+
+void Em_Hal_watchOn(void) {
+ UART_WATCH_ENABLE();
+}
+
+
+/* -------- INTERNAL FUNCTIONS -------- */
+
+static void gpioHandler(uint8_t id) {
+ uint16_t mask = BIT3 << id;
+
+ Hal_delay(GPIO_DEBOUNCE_MSECS);
+ if (GPIO_LOW(mask) && appGpioHandler)
+ appGpioHandler(id);
+ GPIO_ENABLE(mask);
+}
+
+static void postEvent(uint8_t handlerId) {
+ uint8_t key = Em_Hal_lock();
+ handlerEvents |= 1 << handlerId;
+ Em_Hal_unlock(key);
+}
+
+/* -------- INTERRUPT SERVICE ROUTINES -------- */
+
+#ifdef __GNUC__
+ __attribute__((interrupt(PORT1_VECTOR)))
+#endif
+#ifdef __TI_COMPILER_VERSION__
+ #pragma vector=PORT1_VECTOR
+#endif
+INTERRUPT void gpioIsr(void) {
+ uint8_t id;
+ uint16_t mask;
+
+ for (id = 0, mask = BIT3; id < 3; id++, mask <<= 1)
+ if (GPIO_FIRED(mask)) {
+ postEvent(id);
+ GPIO_DISABLE(mask);
+ }
+ WAKEUP();
+}
+
+#ifdef __GNUC__
+ __attribute__((interrupt(EAP_RX_VECTOR)))
+#endif
+#ifdef __TI_COMPILER_VERSION__
+ #pragma vector=EAP_RX_VECTOR
+#endif
+INTERRUPT void rxIsr(void) {
+ uint8_t b = EAP_RX_BUF;
+ Em_Message_startRx();
+ EAP_RX_ACK_CLR();
+ EAP_RX_ACK_SET();
+ if (Em_Message_addByte(b)) {
+ postEvent(DISPATCH_HANDLER_ID);
+ }
+ WAKEUP();
+}
+
+#ifdef __GNUC__
+ __attribute__((interrupt(TIMER1_A0_VECTOR)))
+#endif
+#ifdef __TI_COMPILER_VERSION__
+ #pragma vector=TIMER1_A0_VECTOR
+#endif
+INTERRUPT void timerIsr(void) {
+ TA1CCR0 += clockTick;
+ postEvent(TICK_HANDLER_ID);
+ WAKEUP();
+}
+
+#ifdef __GNUC__
+ __attribute__((interrupt(EAP_TX_ACK_VECTOR)))
+#endif
+#ifdef __TI_COMPILER_VERSION__
+ #pragma vector=EAP_TX_ACK_VECTOR
+#endif
+INTERRUPT void txAckIsr(void) {
+ if (EAP_TX_ACK_TST()) {
+ uint8_t b;
+ if (Em_Message_getByte(&b)) {
+ EAP_TX_BUF = b;
+ }
+ EAP_TX_ACK_CLR();
+ }
+ WAKEUP();
+}
+
+#ifdef __GNUC__
+ __attribute__((interrupt(TIMER1_A1_VECTOR)))
+#endif
+#ifdef __TI_COMPILER_VERSION__
+ #pragma vector=TIMER1_A1_VECTOR
+#endif
+INTERRUPT void uartWatchdogIsr(void) {
+ switch (TA1IV) {
+ case 2: // CCR1
+ UART_WATCH_DISABLE();
+ Em_Message_restart();
+ WAKEUP();
+ break;
+ }
+}
projects / pulsecounter.git / blobdiff