/* * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============ */ #include "Hal.h" #include "Em_Message.h" #include /* -------- 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_ENABLE(); /* 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) { #ifdef __GNUC__ uint8_t key = READ_SR & 0x8; __disable_interrupt(); return key; #endif #ifdef __TI_COMPILER_VERSION__ uint8_t key = _get_interrupt_state(); _disable_interrupt(); return key; #endif } 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) { #ifdef __GNUC__ __asm__("bis %0,r2" : : "ir" ((uint16_t) key)); #endif #ifdef __TI_COMPILER_VERSION__ _set_interrupt_state(key); #endif } 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; } }