--- /dev/null
+/*
+ * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============
+ */
+
+#include "Hal.h"
+#include "Em_Message.h"
+
+#include <msp430.h>
+
+
+/* -------- INTERNAL FEATURES -------- */
+
+#define LED_CONFIG() (P1DIR |= BIT6)
+#define LED_ON() (P1OUT |= BIT6)
+#define LED_OFF() (P1OUT &= ~BIT6)
+#define LED_READ() (P1OUT & BIT6)
+#define LED_TOGGLE() (P1OUT ^= BIT6)
+
+#define CONNECTED_LED_CONFIG() (P1DIR |= BIT0)
+#define CONNECTED_LED_ON() (P1OUT |= BIT0)
+#define CONNECTED_LED_OFF() (P1OUT &= ~BIT0)
+
+#define BUTTON_CONFIG() (P1DIR &= ~BIT3, P1REN |= BIT3, P1OUT |= BIT3, P1IES |= BIT3);
+#define BUTTON_ENABLE() (P1IFG &= ~BIT3, P1IE |= BIT3)
+#define BUTTON_PRESSED() (!(P1IN & BIT3))
+#define BUTTON_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 12000L
+#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 3
+
+#define BUTTON_HANDLER_ID 0
+#define TICK_HANDLER_ID 1
+#define DISPATCH_HANDLER_ID 2
+
+static void buttonHandler(void);
+static void postEvent(uint8_t handlerId);
+
+static Hal_Handler appButtonHandler;
+static volatile uint16_t handlerEvents = 0;
+static uint16_t clockTick = 0;
+static Hal_Handler handlerTab[NUM_HANDLERS];
+
+
+/* -------- APP-HAL INTERFACE -------- */
+
+void Hal_buttonEnable(Hal_Handler handler) {
+ handlerTab[BUTTON_HANDLER_ID] = buttonHandler;
+ appButtonHandler = handler;
+ BUTTON_CONFIG();
+ Hal_delay(100);
+ BUTTON_ENABLE();
+}
+
+void Hal_connected(void) {
+ CONNECTED_LED_ON();
+}
+
+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) {
+ CONNECTED_LED_OFF();
+}
+
+void Hal_init(void) {
+
+ /* setup clocks */
+
+ WDTCTL = WDTPW + WDTHOLD;
+ BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0;
+ if (CALBC1_1MHZ != 0xFF) {
+ DCOCTL = 0x00;
+ BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */
+ DCOCTL = CALDCO_1MHZ;
+ }
+ BCSCTL1 |= XT2OFF + DIVA_0;
+ BCSCTL3 = XT2S_0 + LFXT1S_2 + XCAP_1;
+
+ /* setup LEDs */
+
+ LED_CONFIG();
+ LED_OFF();
+ CONNECTED_LED_CONFIG();
+ CONNECTED_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]();
+ }
+ }
+ }
+ else { // await more events
+ SLEEP();
+ }
+ }
+}
+
+void Hal_ledOn(void) {
+ LED_ON();
+}
+
+void Hal_ledOff(void) {
+ LED_OFF();
+}
+
+bool Hal_ledRead(void) {
+ return LED_READ();
+}
+
+void Hal_ledToggle(void) {
+ 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
+}
+
+
+/* -------- 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 buttonHandler(void) {
+ Hal_delay(100);
+ if (BUTTON_PRESSED() && appButtonHandler) {
+ appButtonHandler();
+ }
+}
+
+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 buttonIsr(void) {
+ postEvent(BUTTON_HANDLER_ID);
+ BUTTON_ENABLE();
+ 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;
+ }
+}
--- /dev/null
+/**
+ * Hal.h -- HAL Interface Definitions
+ *
+ * This example HAL is intentionally simple. The implementation is limited to:
+ *
+ * BUTTON -- a single button that when pressed will cause an interrupt.
+ * CONNECTED_LED -- an LED that is controlled inside the HAL to indicate connection to a central.
+ * DEBUG -- two debug GPIOs that are available as outputs from the EAP and under user control.
+ * DELAY -- a delay routine that can delay by n milliseconds.
+ * INIT -- set the hardware up to its initial state
+ * LED -- a user LED that is available for application control.
+ * TICK -- a timer that can be set to interrupt every n milliseconds
+ * IDLE LOOP -- an event driven idle loop for controlling the EAP
+ *
+ * For information on Hal implementations for specific target hardware platforms,
+ * visit the http://wiki.em-hub.com/display/ED.
+ *
+ **/
+
+#ifndef Hal__H
+#define Hal__H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*Hal_Handler)(void);
+
+/**
+ * --------- Hal_buttonEnable ---------
+ *
+ * Enable the button interrupt and connect it to the user's buttonHandler
+ *
+ * When the button is pressed, it will cause an interrupt that will cause BUTTON event
+ * to be entered into the event list. Once dispatched by the idle loop, the user's
+ * buttonHandler will be called.
+ *
+ * Inputs:
+ * buttonHandler - pointer to the user's handler to be called after interrupt
+ *
+ * Returns:
+ * None
+ *
+ * Side effects:
+ * BUTTON interrupt enabled
+ *
+ **/
+extern void Hal_buttonEnable(Hal_Handler handler);
+/**
+ * --------- Hal_connected ---------
+ *
+ * Called whenever the MCM peripheral connects to a central.
+ *
+ * Turns on the CONNECTED_LED to show connectivity to the central
+ * Could do other things associated with connection to the central.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * CONNECTED_LED on.
+ *
+ **/
+extern void Hal_connected(void);
+/**
+ * --------- Hal_debugOff ---------
+ *
+ * Turns the selected DEBUG line off.
+ *
+ * The two DEBUG lines are output GPIOs that are available to the user for
+ * debug purposes.
+ *
+ * Inputs:
+ * line - the index value of the debug line to turn off
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * DEBUG line off.
+ *
+ **/
+extern void Hal_debugOff(uint8_t line);
+/**
+ * --------- Hal_debugOn ---------
+ *
+ * Turns the selected DEBUG line on.
+ *
+ * The two DEBUG lines are output GPIOs that are available to the user for
+ * debug purposes.
+ *
+ * Inputs:
+ * line - the index value of the debug line to turn on
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * DEBUG line on.
+ *
+ **/
+extern void Hal_debugOn(uint8_t line);
+/**
+ * --------- Hal_debugPulse ---------
+ *
+ * Emits a pulse on the selected DEBUG line.
+ *
+ * The two DEBUG lines are output GPIOs that are available to the user for
+ * debug purposes.
+ *
+ * Inputs:
+ * line - the index value of the debug line to emit a pulse
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * DEBUG line turns on then off.
+ *
+ **/
+extern void Hal_debugPulse(uint8_t line);
+/**
+ * --------- Hal_delay ---------
+ *
+ * Delays for the specified number of milliseconds.
+ *
+ * In this example, delay is done with CPU spinning for simplicity's sake.
+ * This could easily use a timer interrupt for more power savings.
+ *
+ * Inputs:
+ * msecs - the number of milliseconds to delay
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * None
+ *
+ **/
+extern void Hal_delay(uint16_t msecs);
+/**
+ * --------- Hal_disconnected ---------
+ *
+ * Called whenever the MCM peripheral disconnects from a central.
+ *
+ * Turns off the CONNECTED_LED to show lack of connectivity to the central
+ * Could do other things associated with connection to the central.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * CONNECTED_LED off.
+ *
+ **/
+extern void Hal_disconnected(void);
+/**
+ * --------- Hal_idleLoop ---------
+ *
+ * The idle loop that controls EAP operations.
+ *
+ * The hal implements an event driven "idle loop" scheduler.
+ * When there are no events pending, the idle loop sleeps.
+ * When an event happens, the idle loop wakes up, and dispatches
+ * to the appropriate event handler.
+ *
+ * The dispatching is done through a handlerTab that has one entry for each type of event.
+ * Each handlerTab entry should be a handler of type hal_handler *.
+ * There are currently three types of events, i.e. entries in the handlerTab:
+ * BUTTON_HANDLER_ID: handler to call upon a button press
+ * TICK_HANDLER_ID: handler to call upon a timer interrupt
+ * DISPATCH_HANDLER_ID: handler to call upon a received message from the MCM
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * dispatches events as they come in
+ *
+ **/
+extern void Hal_idleLoop(void);
+/**
+ * --------- Hal_init ---------
+ *
+ * Initialize the hardware
+ *
+ * Initializes the EAP and MCM into their reset state. Should be called first.
+ * Sets up the clock, ports, watchdog timer, etc.
+ *
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * EAP and MCM in their initial state.
+ *
+ **/
+extern void Hal_init(void);
+/**
+ * --------- Hal_ledOff ---------
+ *
+ * Turns the user LED off.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * User LED off.
+ *
+ **/
+extern void Hal_ledOff(void);
+/**
+ * --------- Hal_ledOn ---------
+ *
+ * Turns the user LED on.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * User LED on.
+ *
+ **/
+extern void Hal_ledOn(void);
+/**
+ * --------- Hal_ledRead ---------
+ *
+ * Returns the user LED state.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * Bool - (true = user LED is on, false = user LED is off)
+ *
+ * Side Effects:
+ * None
+ *
+ **/
+extern bool Hal_ledRead(void);
+/**
+ * --------- Hal_ledToggle ---------
+ *
+ * Toggles the user LED.
+ *
+ * Inputs:
+ * None
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * User LED toggles state.
+ *
+ **/
+extern void Hal_ledToggle(void);
+/**
+ * --------- Hal_tickStart ---------
+ *
+ * Sets up the timer to interrupt every msecs milliseconds and the user's tickHandler
+ * that will be called upon interrupt.
+ *
+ * Enable a timer interrupt every msecs ms. The interrupt will cause a TICK event
+ * to be entered into the event list. Once dispatched by the idle loop, the user's
+ * tickHandler will be called.
+ *
+ * Inputs:
+ * msecs - the number of milliseconds between tick interrupts
+ * tickHandler - the address of the user's tick handler that will be called
+ *
+ * Returns:
+ * None
+ *
+ * Side Effects:
+ * tickhandler called by the idle loop
+ *
+ **/
+extern void Hal_tickStart(uint16_t msecs, Hal_Handler Handler);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Hal__H */
projects / pulsecounter.git / commitdiff