slow down aux clock

[pulsecounter.git] / Hal / Hal.c

diff --git a/Hal/Hal.c b/Hal/Hal.c
index bb05cd4e1113913c4231649cabc5d6548dd4bbaf..0cdcc297a85b19169fad377c4cf5a2cb2575ed75 100644 (file)
--- a/Hal/Hal.c
+++ b/Hal/Hal.c
@@ -22,10 +22,12 @@
 #define RED_LED_READ()                    (P1OUT & BIT0)
 #define RED_LED_TOGGLE()                  (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 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)
@@ -62,7 +64,7 @@
 #define EAP_TX_INT_ENABLE()         (IE2 |= UCA0TXIE)
 
 #define MCLK_TICKS_PER_MS           1000L
-#define ACLK_TICKS_PER_SECOND       12000L
+#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
@@ -84,18 +86,18 @@
 #define WAKEUP()                    (__bic_SR_register_on_exit(LPM3_bits))
 #endif
 
-#define NUM_HANDLERS 3
+#define NUM_HANDLERS 5
 
-#define BUTTON_HANDLER_ID      0
-#define TICK_HANDLER_ID        1
-#define DISPATCH_HANDLER_ID    2
+#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
 
-int32_t buttonCnt = 0;
-
-static void buttonHandler(void);
+static void gpioHandler(uint8_t id);
 static void postEvent(uint8_t handlerId);
 
-static Hal_Handler appButtonHandler;
+static Hal_Handler appGpioHandler;
 static volatile uint16_t handlerEvents = 0;
 static uint16_t clockTick = 0;
 static Hal_Handler handlerTab[NUM_HANDLERS];
@@ -103,12 +105,17 @@ 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_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) {
@@ -160,13 +167,21 @@ 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;
     }
-    BCSCTL1 |= XT2OFF + DIVA_0;
+    /* 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 */
@@ -226,7 +241,7 @@ void Hal_idleLoop(void) {
             uint8_t id;
             for (id = 0, mask = 0x1; id < NUM_HANDLERS; id++, mask <<= 1) {
                 if ((events & mask) && handlerTab[id]) {
-                    handlerTab[id]();
+                    handlerTab[id](id);
                 }
             }
         }
@@ -275,6 +290,11 @@ void Hal_tickStart(uint16_t msecs, Hal_Handler handler) {
     TA1CCTL0 = CCIE;                            // Enable the CCR0 interrupt
 }
 
+void Hal_tickStop(void) {
+    handlerTab[TICK_HANDLER_ID] = 0;
+    TA1CCR0 = 0;
+    TA1CCTL0 = 0;
+}
 
 /* -------- SRT-HAL INTERFACE -------- */
 
@@ -321,11 +341,13 @@ void Em_Hal_watchOn(void) {
 
 /* -------- INTERNAL FUNCTIONS -------- */
 
-static void buttonHandler(void) {
-    Hal_delay(100);
-    if (BUTTON_PRESSED() && appButtonHandler) {
-        appButtonHandler();
-    }
+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) {
@@ -342,10 +364,15 @@ static void postEvent(uint8_t handlerId) {
 #ifdef __TI_COMPILER_VERSION__
     #pragma vector=PORT1_VECTOR
 #endif
-INTERRUPT void buttonIsr(void) {
-    buttonCnt++;
-    postEvent(BUTTON_HANDLER_ID);
-    BUTTON_ENABLE();
+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();
 }