Merge branch 'master' of https://github.com/mbedmicro/mbed

libraries/mbed/targets/cmsis/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32ZG_STK3200/TOOLCHAIN_ARM_MICRO/startup_efm32zg.s

@@ -29,7 +29,7 @@
 ;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
 ; </h>
 
-Stack_Size      EQU     0x00000400
+Stack_Size      EQU     0x00000200
 
                 AREA    STACK, NOINIT, READWRITE, ALIGN=3
 Stack_Mem       SPACE   Stack_Size

libraries/mbed/targets/cmsis/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32ZG_STK3200/TOOLCHAIN_GCC_ARM/startup_efm32zg.S

@@ -37,7 +37,7 @@
 #ifdef __STACK_SIZE
     .equ    Stack_Size, __STACK_SIZE
 #else
-    .equ    Stack_Size, 0x400
+    .equ    Stack_Size, 0x200
 #endif
     .globl    __StackTop
     .globl    __StackLimit

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/device.h

@@ -64,6 +64,8 @@
 
 #define DEVICE_ERROR_PATTERN    1
 
+#define DEVICE_LOWPOWERTIMER    1
+
 #define DEVICE_CAN              0
 #define DEVICE_ETHERNET         0
 

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/rtc_api.c

@@ -32,56 +32,51 @@
  */
 
 #include "rtc_api.h"
+#include "lp_ticker_api.h"
 #include "cmsis.h"
 #include "rtc_regs.h"
 #include "pwrseq_regs.h"
 #include "clkman_regs.h"
 
+#define PRESCALE_VAL    MXC_E_RTC_PRESCALE_DIV_2_0    // Set the divider for the 4kHz clock
+#define SHIFT_AMT       (MXC_E_RTC_PRESCALE_DIV_2_12 - PRESCALE_VAL)
+
 static int rtc_inited = 0;
 static volatile uint32_t overflow_cnt = 0;
-static uint32_t overflow_alarm = 0;
+
+static uint64_t rtc_read64(void);
 
 //******************************************************************************
 static void overflow_handler(void)
 {
-    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
+    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_OVERFLOW;
     overflow_cnt++;
-
-    if (overflow_cnt == overflow_alarm) {
-        // Enable the comparator interrupt for the alarm
-        MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
-    }
-}
-
-//******************************************************************************
-static void alarm_handler(void)
-{
-    MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
-    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
 }
 
 //******************************************************************************
 void rtc_init(void)
 {
-    if(rtc_inited) {
+    if (rtc_inited) {
         return;
     }
     rtc_inited = 1;
 
+    overflow_cnt = 0;
+
     // Enable the clock to the synchronizer
     MXC_CLKMAN->clk_ctrl_13_rtc_int_sync = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
 
     // Enable the clock to the RTC
     MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN;
 
-    // Set the divider from the 4kHz clock
+    // Set the clock divider
-    MXC_RTCTMR->prescale = MXC_E_RTC_PRESCALE_DIV_2_0;
+    MXC_RTCTMR->prescale = PRESCALE_VAL;
 
     // Enable the overflow interrupt
     MXC_RTCTMR->inten |= MXC_F_RTC_FLAGS_OVERFLOW;
 
     // Prepare interrupt handlers
-    NVIC_SetVector(RTC0_IRQn, (uint32_t)alarm_handler);
+    NVIC_SetVector(RTC0_IRQn, (uint32_t)lp_ticker_irq_handler);
     NVIC_EnableIRQ(RTC0_IRQn);
     NVIC_SetVector(RTC3_IRQn, (uint32_t)overflow_handler);
     NVIC_EnableIRQ(RTC3_IRQn);
@@ -90,6 +85,12 @@ void rtc_init(void)
     MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;
 }
 
+//******************************************************************************
+void lp_ticker_init(void)
+{
+    rtc_init();
+}
+
 //******************************************************************************
 void rtc_free(void)
 {
@@ -118,73 +119,104 @@ int rtc_isenabled(void)
 //******************************************************************************
 time_t rtc_read(void)
 {
-    unsigned int shift_amt;
     uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
-
+    uint32_t ovf1, ovf2;
-    // Account for a change in the default prescaler
-    shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Ensure coherency between overflow_cnt and timer
     do {
         ovf_cnt_1 = overflow_cnt;
+        ovf1 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         timer_cnt = MXC_RTCTMR->timer;
+        ovf2 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         ovf_cnt_2 = overflow_cnt;
-    } while (ovf_cnt_1 != ovf_cnt_2);
+    } while ((ovf_cnt_1 != ovf_cnt_2) || (ovf1 != ovf2));
 
-    return (timer_cnt >> shift_amt) + (ovf_cnt_1 << (32 - shift_amt));
+    // Account for an unserviced interrupt
+    if (ovf1) {
+        ovf_cnt_1++;
+    }
+
+    return (timer_cnt >> SHIFT_AMT) + (ovf_cnt_1 << (32 - SHIFT_AMT));
 }
 
 //******************************************************************************
-uint64_t rtc_read_us(void)
+static uint64_t rtc_read64(void)
 {
-    unsigned int shift_amt;
     uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
-    uint64_t currentUs;
+    uint32_t ovf1, ovf2;
-
+    uint64_t current_us;
-    // Account for a change in the default prescaler
-    shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Ensure coherency between overflow_cnt and timer
     do {
         ovf_cnt_1 = overflow_cnt;
+        ovf1 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         timer_cnt = MXC_RTCTMR->timer;
+        ovf2 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         ovf_cnt_2 = overflow_cnt;
-    } while (ovf_cnt_1 != ovf_cnt_2);
+    } while ((ovf_cnt_1 != ovf_cnt_2) || (ovf1 != ovf2));
 
-    currentUs = (((uint64_t)timer_cnt * 1000000) >> shift_amt) + (((uint64_t)ovf_cnt_1 * 1000000) << (32 - shift_amt));
+    // Account for an unserviced interrupt
+    if (ovf1) {
+        ovf_cnt_1++;
+    }
 
-    return currentUs;
+    current_us = (((uint64_t)timer_cnt * 1000000) >> SHIFT_AMT) + (((uint64_t)ovf_cnt_1 * 1000000) << (32 - SHIFT_AMT));
+
+    return current_us;
 }
 
 //******************************************************************************
 void rtc_write(time_t t)
 {
-    // Account for a change in the default prescaler
-    unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
-
     MXC_RTCTMR->ctrl &= ~MXC_F_RTC_CTRL_ENABLE; // disable the timer while updating
-    MXC_RTCTMR->timer = t << shift_amt;
+    MXC_RTCTMR->timer = t << SHIFT_AMT;
-    overflow_cnt = t >> (32 - shift_amt);
+    overflow_cnt = t >> (32 - SHIFT_AMT);
     MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;  // enable the timer while updating
 }
 
 //******************************************************************************
-void rtc_set_wakeup(uint64_t wakeupUs)
+void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
-    // Account for a change in the default prescaler
+    // Note: interrupts are disabled before this function is called.
-    unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Disable the alarm while it is prepared
     MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
     MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_COMP0;      // clear interrupt
 
-    overflow_alarm = (wakeupUs >> (32 - shift_amt)) / 1000000;
+    uint64_t curr_ts64 = rtc_read64();
-
+    uint64_t ts64 = (uint64_t)timestamp | (curr_ts64 & 0xFFFFFFFF00000000ULL);
-    if (overflow_alarm == overflow_cnt) {
+    if (ts64 < curr_ts64) {
-        MXC_RTCTMR->comp[0] = (wakeupUs << shift_amt) / 1000000;
+        if (ts64 < (curr_ts64 - 1000)) {
-        MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+            ts64 += 0x100000000ULL;
+        } else {
+            // This event has already occurred. Set the alarm to expire immediately.
+            MXC_RTCTMR->comp[0] = MXC_RTCTMR->timer + 2;
+            MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+            return;
+        }
     }
 
+    MXC_RTCTMR->comp[0] = (ts64 << SHIFT_AMT) / 1000000;
+    MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+
     // Enable wakeup from RTC
     MXC_PWRSEQ->msk_flags &= ~(MXC_F_PWRSEQ_MSK_FLAGS_RTC_ROLLOVER | MXC_F_PWRSEQ_MSK_FLAGS_RTC_CMPR0);
 }
+
+//******************************************************************************
+inline void lp_ticker_disable_interrupt(void)
+{
+    MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
+}
+
+//******************************************************************************
+inline void lp_ticker_clear_interrupt(void)
+{
+    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
+}
+
+//******************************************************************************
+inline uint32_t lp_ticker_read(void)
+{
+    return rtc_read64();
+}

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/sleep.c

@@ -32,20 +32,12 @@
  */
 
 #include "sleep_api.h"
-#include "us_ticker_api.h"
 #include "cmsis.h"
 #include "pwrman_regs.h"
 #include "pwrseq_regs.h"
 #include "ioman_regs.h"
 #include "rtc_regs.h"
 
-#define MIN_DEEP_SLEEP_US       500
-
-uint64_t rtc_read_us(void);
-void rtc_set_wakeup(uint64_t wakeupUs);
-void us_ticker_deinit(void);
-void us_ticker_set(timestamp_t timestamp);
-
 static mxc_uart_regs_t *stdio_uart = (mxc_uart_regs_t*)STDIO_UART;
 
 // Normal wait mode
@@ -80,38 +72,11 @@ static void clearAllGPIOWUD(void)
 // Low-power stop mode
 void deepsleep(void)
 {
-    uint64_t sleepStartRtcUs;
-    uint32_t sleepStartTickerUs;
-    int32_t sleepDurationUs;
-    uint64_t sleepEndRtcUs;
-    uint64_t elapsedUs;
-
     __disable_irq();
 
     // Wait for all STDIO characters to be sent. The UART clock will stop.
     while (stdio_uart->status & MXC_F_UART_STATUS_TX_BUSY);
 
-    // Record the current times
-    sleepStartRtcUs = rtc_read_us();
-    sleepStartTickerUs = us_ticker_read();
-
-    // Get the next mbed timer expiration
-    timestamp_t next_event = 0;
-    us_ticker_get_next_timestamp(&next_event);
-    sleepDurationUs = next_event - sleepStartTickerUs;
-
-    if (sleepDurationUs < MIN_DEEP_SLEEP_US) {
-        /* The next wakeup is too soon. */
-        __enable_irq();
-        return;
-    }
-
-    // Disable the us_ticker. It won't be clocked in DeepSleep
-    us_ticker_deinit();
-
-    // Prepare to wakeup from the RTC
-    rtc_set_wakeup(sleepStartRtcUs + sleepDurationUs);
-
     // Prepare for LP1
     uint32_t reg0 = MXC_PWRSEQ->reg0;
     reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM3EN_SLP;  // disable VDD3 SVM during sleep mode
@@ -151,19 +116,8 @@ void deepsleep(void)
     // Woke up from LP1
 
     // The RTC timer does not update until the next tick
-    uint64_t tempUs = rtc_read_us();
+    uint32_t temp = MXC_RTCTMR->timer;
-    do {
+    while (MXC_RTCTMR->timer == temp);
-        sleepEndRtcUs = rtc_read_us();
-    } while(sleepEndRtcUs == tempUs);
-
-    // Get the elapsed time from the RTC. Wakeup could have been from some other event.
-    elapsedUs = sleepEndRtcUs - sleepStartRtcUs;
-
-    // Update the us_ticker. It was not clocked during DeepSleep
-    us_ticker_init();
-    us_ticker_set(sleepStartTickerUs + elapsedUs);
-    us_ticker_get_next_timestamp(&next_event);
-    us_ticker_set_interrupt(next_event);
 
     __enable_irq();
 }

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/us_ticker.c

@@ -53,7 +53,7 @@ static inline void inc_current_cnt(uint32_t inc) {
 
     // Overflow the ticker when the us ticker overflows
     current_cnt += inc;
-    if(current_cnt > MAX_TICK_VAL) {
+    if (current_cnt > MAX_TICK_VAL) {
         current_cnt -= (MAX_TICK_VAL + 1);
     }
 }
@@ -64,7 +64,7 @@ static inline int event_passed(uint64_t current, uint64_t event) {
     // Determine if the event has already happened.
     // If the event is behind the current ticker, within a window,
     // then the event has already happened.
-    if(((current < tick_win) && ((event < current) || 
+    if (((current < tick_win) && ((event < current) || 
         (event > (MAX_TICK_VAL - (tick_win - current))))) || 
         ((event < current) && (event > (current - tick_win)))) {
         return 1;
@@ -169,7 +169,7 @@ uint32_t us_ticker_read(void)
 {
     uint64_t current_cnt1, current_cnt2;
     uint32_t term_cnt, tmr_cnt;
-    int intfl1, intfl2;
+    uint32_t intfl1, intfl2;
 
     if (!us_ticker_inited)
         us_ticker_init();
@@ -184,6 +184,7 @@ uint32_t us_ticker_read(void)
         current_cnt2 = current_cnt;
     } while ((current_cnt1 != current_cnt2) || (intfl1 != intfl2));
 
+    // Account for an unserviced interrupt
     if (intfl1) {
         current_cnt1 += term_cnt;
     }
@@ -197,6 +198,7 @@ uint32_t us_ticker_read(void)
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
     // Note: interrupts are disabled before this function is called.
+
     US_TIMER->ctrl &= ~MXC_F_TMR_CTRL_ENABLE0;  // disable timer
 
     if (US_TIMER->intfl) {

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32610/device.h

@@ -64,6 +64,8 @@
 
 #define DEVICE_ERROR_PATTERN    1
 
+#define DEVICE_LOWPOWERTIMER    1
+
 #define DEVICE_CAN              0
 #define DEVICE_ETHERNET         0
 

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32610/rtc_api.c

@@ -32,56 +32,51 @@
  */
 
 #include "rtc_api.h"
+#include "lp_ticker_api.h"
 #include "cmsis.h"
 #include "rtc_regs.h"
 #include "pwrseq_regs.h"
 #include "clkman_regs.h"
 
+#define PRESCALE_VAL    MXC_E_RTC_PRESCALE_DIV_2_0    // Set the divider for the 4kHz clock
+#define SHIFT_AMT       (MXC_E_RTC_PRESCALE_DIV_2_12 - PRESCALE_VAL)
+
 static int rtc_inited = 0;
 static volatile uint32_t overflow_cnt = 0;
-static uint32_t overflow_alarm = 0;
+
+static uint64_t rtc_read64(void);
 
 //******************************************************************************
 static void overflow_handler(void)
 {
-    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
+    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_OVERFLOW;
     overflow_cnt++;
-
-    if (overflow_cnt == overflow_alarm) {
-        // Enable the comparator interrupt for the alarm
-        MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
-    }
-}
-
-//******************************************************************************
-static void alarm_handler(void)
-{
-    MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
-    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
 }
 
 //******************************************************************************
 void rtc_init(void)
 {
-    if(rtc_inited) {
+    if (rtc_inited) {
         return;
     }
     rtc_inited = 1;
 
+    overflow_cnt = 0;
+
     // Enable the clock to the synchronizer
     MXC_CLKMAN->clk_ctrl_13_rtc_int_sync = MXC_E_CLKMAN_CLK_SCALE_ENABLED;
 
     // Enable the clock to the RTC
     MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_RTCEN_RUN;
 
-    // Set the divider from the 4kHz clock
+    // Set the clock divider
-    MXC_RTCTMR->prescale = MXC_E_RTC_PRESCALE_DIV_2_0;
+    MXC_RTCTMR->prescale = PRESCALE_VAL;
 
     // Enable the overflow interrupt
     MXC_RTCTMR->inten |= MXC_F_RTC_FLAGS_OVERFLOW;
 
     // Prepare interrupt handlers
-    NVIC_SetVector(RTC0_IRQn, (uint32_t)alarm_handler);
+    NVIC_SetVector(RTC0_IRQn, (uint32_t)lp_ticker_irq_handler);
     NVIC_EnableIRQ(RTC0_IRQn);
     NVIC_SetVector(RTC3_IRQn, (uint32_t)overflow_handler);
     NVIC_EnableIRQ(RTC3_IRQn);
@@ -90,6 +85,12 @@ void rtc_init(void)
     MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;
 }
 
+//******************************************************************************
+void lp_ticker_init(void)
+{
+    rtc_init();
+}
+
 //******************************************************************************
 void rtc_free(void)
 {
@@ -118,73 +119,104 @@ int rtc_isenabled(void)
 //******************************************************************************
 time_t rtc_read(void)
 {
-    unsigned int shift_amt;
     uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
-
+    uint32_t ovf1, ovf2;
-    // Account for a change in the default prescaler
-    shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Ensure coherency between overflow_cnt and timer
     do {
         ovf_cnt_1 = overflow_cnt;
+        ovf1 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         timer_cnt = MXC_RTCTMR->timer;
+        ovf2 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         ovf_cnt_2 = overflow_cnt;
-    } while (ovf_cnt_1 != ovf_cnt_2);
+    } while ((ovf_cnt_1 != ovf_cnt_2) || (ovf1 != ovf2));
 
-    return (timer_cnt >> shift_amt) + (ovf_cnt_1 << (32 - shift_amt));
+    // Account for an unserviced interrupt
+    if (ovf1) {
+        ovf_cnt_1++;
+    }
+
+    return (timer_cnt >> SHIFT_AMT) + (ovf_cnt_1 << (32 - SHIFT_AMT));
 }
 
 //******************************************************************************
-uint64_t rtc_read_us(void)
+static uint64_t rtc_read64(void)
 {
-    unsigned int shift_amt;
     uint32_t ovf_cnt_1, ovf_cnt_2, timer_cnt;
-    uint64_t currentUs;
+    uint32_t ovf1, ovf2;
-
+    uint64_t current_us;
-    // Account for a change in the default prescaler
-    shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Ensure coherency between overflow_cnt and timer
     do {
         ovf_cnt_1 = overflow_cnt;
+        ovf1 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         timer_cnt = MXC_RTCTMR->timer;
+        ovf2 = MXC_RTCTMR->flags & MXC_F_RTC_FLAGS_OVERFLOW;
         ovf_cnt_2 = overflow_cnt;
-    } while (ovf_cnt_1 != ovf_cnt_2);
+    } while ((ovf_cnt_1 != ovf_cnt_2) || (ovf1 != ovf2));
 
-    currentUs = (((uint64_t)timer_cnt * 1000000) >> shift_amt) + (((uint64_t)ovf_cnt_1 * 1000000) << (32 - shift_amt));
+    // Account for an unserviced interrupt
+    if (ovf1) {
+        ovf_cnt_1++;
+    }
 
-    return currentUs;
+    current_us = (((uint64_t)timer_cnt * 1000000) >> SHIFT_AMT) + (((uint64_t)ovf_cnt_1 * 1000000) << (32 - SHIFT_AMT));
+
+    return current_us;
 }
 
 //******************************************************************************
 void rtc_write(time_t t)
 {
-    // Account for a change in the default prescaler
-    unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
-
     MXC_RTCTMR->ctrl &= ~MXC_F_RTC_CTRL_ENABLE; // disable the timer while updating
-    MXC_RTCTMR->timer = t << shift_amt;
+    MXC_RTCTMR->timer = t << SHIFT_AMT;
-    overflow_cnt = t >> (32 - shift_amt);
+    overflow_cnt = t >> (32 - SHIFT_AMT);
     MXC_RTCTMR->ctrl |= MXC_F_RTC_CTRL_ENABLE;  // enable the timer while updating
 }
 
 //******************************************************************************
-void rtc_set_wakeup(uint64_t wakeupUs)
+void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
-    // Account for a change in the default prescaler
+    // Note: interrupts are disabled before this function is called.
-    unsigned int shift_amt = MXC_E_RTC_PRESCALE_DIV_2_12 - MXC_RTCTMR->prescale;
 
     // Disable the alarm while it is prepared
     MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
     MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_COMP0;      // clear interrupt
 
-    overflow_alarm = (wakeupUs >> (32 - shift_amt)) / 1000000;
+    uint64_t curr_ts64 = rtc_read64();
-
+    uint64_t ts64 = (uint64_t)timestamp | (curr_ts64 & 0xFFFFFFFF00000000ULL);
-    if (overflow_alarm == overflow_cnt) {
+    if (ts64 < curr_ts64) {
-        MXC_RTCTMR->comp[0] = (wakeupUs << shift_amt) / 1000000;
+        if (ts64 < (curr_ts64 - 1000)) {
-        MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+            ts64 += 0x100000000ULL;
+        } else {
+            // This event has already occurred. Set the alarm to expire immediately.
+            MXC_RTCTMR->comp[0] = MXC_RTCTMR->timer + 2;
+            MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+            return;
+        }
     }
 
+    MXC_RTCTMR->comp[0] = (ts64 << SHIFT_AMT) / 1000000;
+    MXC_RTCTMR->inten |= MXC_F_RTC_INTEN_COMP0;
+
     // Enable wakeup from RTC
     MXC_PWRSEQ->msk_flags &= ~(MXC_F_PWRSEQ_MSK_FLAGS_RTC_ROLLOVER | MXC_F_PWRSEQ_MSK_FLAGS_RTC_CMPR0);
 }
+
+//******************************************************************************
+inline void lp_ticker_disable_interrupt(void)
+{
+    MXC_RTCTMR->inten &= ~MXC_F_RTC_INTEN_COMP0;
+}
+
+//******************************************************************************
+inline void lp_ticker_clear_interrupt(void)
+{
+    MXC_RTCTMR->flags = MXC_F_RTC_FLAGS_ASYNC_CLR_FLAGS;
+}
+
+//******************************************************************************
+inline uint32_t lp_ticker_read(void)
+{
+    return rtc_read64();
+}

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32610/sleep.c

@@ -32,20 +32,12 @@
  */
 
 #include "sleep_api.h"
-#include "us_ticker_api.h"
 #include "cmsis.h"
 #include "pwrman_regs.h"
 #include "pwrseq_regs.h"
 #include "ioman_regs.h"
 #include "rtc_regs.h"
 
-#define MIN_DEEP_SLEEP_US       500
-
-uint64_t rtc_read_us(void);
-void rtc_set_wakeup(uint64_t wakeupUs);
-void us_ticker_deinit(void);
-void us_ticker_set(timestamp_t timestamp);
-
 static mxc_uart_regs_t *stdio_uart = (mxc_uart_regs_t*)STDIO_UART;
 
 // Normal wait mode
@@ -80,38 +72,11 @@ static void clearAllGPIOWUD(void)
 // Low-power stop mode
 void deepsleep(void)
 {
-    uint64_t sleepStartRtcUs;
-    uint32_t sleepStartTickerUs;
-    int32_t sleepDurationUs;
-    uint64_t sleepEndRtcUs;
-    uint64_t elapsedUs;
-
     __disable_irq();
 
     // Wait for all STDIO characters to be sent. The UART clock will stop.
     while (stdio_uart->status & MXC_F_UART_STATUS_TX_BUSY);
 
-    // Record the current times
-    sleepStartRtcUs = rtc_read_us();
-    sleepStartTickerUs = us_ticker_read();
-
-    // Get the next mbed timer expiration
-    timestamp_t next_event = 0;
-    us_ticker_get_next_timestamp(&next_event);
-    sleepDurationUs = next_event - sleepStartTickerUs;
-
-    if (sleepDurationUs < MIN_DEEP_SLEEP_US) {
-        /* The next wakeup is too soon. */
-        __enable_irq();
-        return;
-    }
-
-    // Disable the us_ticker. It won't be clocked in DeepSleep
-    us_ticker_deinit();
-
-    // Prepare to wakeup from the RTC
-    rtc_set_wakeup(sleepStartRtcUs + sleepDurationUs);
-
     // Prepare for LP1
     uint32_t reg0 = MXC_PWRSEQ->reg0;
     reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_SVM3EN_SLP;  // disable VDD3 SVM during sleep mode
@@ -151,19 +116,8 @@ void deepsleep(void)
     // Woke up from LP1
 
     // The RTC timer does not update until the next tick
-    uint64_t tempUs = rtc_read_us();
+    uint32_t temp = MXC_RTCTMR->timer;
-    do {
+    while (MXC_RTCTMR->timer == temp);
-        sleepEndRtcUs = rtc_read_us();
-    } while(sleepEndRtcUs == tempUs);
-
-    // Get the elapsed time from the RTC. Wakeup could have been from some other event.
-    elapsedUs = sleepEndRtcUs - sleepStartRtcUs;
-
-    // Update the us_ticker. It was not clocked during DeepSleep
-    us_ticker_init();
-    us_ticker_set(sleepStartTickerUs + elapsedUs);
-    us_ticker_get_next_timestamp(&next_event);
-    us_ticker_set_interrupt(next_event);
 
     __enable_irq();
 }

libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32610/us_ticker.c

@@ -53,7 +53,7 @@ static inline void inc_current_cnt(uint32_t inc) {
 
     // Overflow the ticker when the us ticker overflows
     current_cnt += inc;
-    if(current_cnt > MAX_TICK_VAL) {
+    if (current_cnt > MAX_TICK_VAL) {
         current_cnt -= (MAX_TICK_VAL + 1);
     }
 }
@@ -64,7 +64,7 @@ static inline int event_passed(uint64_t current, uint64_t event) {
     // Determine if the event has already happened.
     // If the event is behind the current ticker, within a window,
     // then the event has already happened.
-    if(((current < tick_win) && ((event < current) || 
+    if (((current < tick_win) && ((event < current) || 
         (event > (MAX_TICK_VAL - (tick_win - current))))) || 
         ((event < current) && (event > (current - tick_win)))) {
         return 1;
@@ -169,7 +169,7 @@ uint32_t us_ticker_read(void)
 {
     uint64_t current_cnt1, current_cnt2;
     uint32_t term_cnt, tmr_cnt;
-    int intfl1, intfl2;
+    uint32_t intfl1, intfl2;
 
     if (!us_ticker_inited)
         us_ticker_init();
@@ -184,6 +184,7 @@ uint32_t us_ticker_read(void)
         current_cnt2 = current_cnt;
     } while ((current_cnt1 != current_cnt2) || (intfl1 != intfl2));
 
+    // Account for an unserviced interrupt
     if (intfl1) {
         current_cnt1 += term_cnt;
     }
@@ -197,6 +198,7 @@ uint32_t us_ticker_read(void)
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
     // Note: interrupts are disabled before this function is called.
+
     US_TIMER->ctrl &= ~MXC_F_TMR_CTRL_ENABLE0;  // disable timer
 
     if (US_TIMER->intfl) {

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F1/pinmap.c

@@ -177,12 +177,21 @@ void pin_mode(PinName pin, PinMode mode)
             if (pin_index < 8) {
                 if ((gpio->CRL & (0x03 << (pin_index * 4))) == 0) { // MODE bits = Input mode
                     gpio->CRL |= (0x08 << (pin_index * 4)); // Set pull-up / pull-down
+                    gpio->CRL &= ~(0x08 << ((pin_index * 4)-1)); // ENSURES GPIOx_CRL.CNFx.bit0 = 0
                 }
             } else {
                 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) == 0) { // MODE bits = Input mode
                     gpio->CRH |= (0x08 << ((pin_index % 8) * 4)); // Set pull-up / pull-down
+                    gpio->CRH &= ~(0x08 << (((pin_index % 8) * 4)-1)); // ENSURES GPIOx_CRH.CNFx.bit0 = 0
                 }
             }
+            // Now it's time to setup properly if pullup or pulldown. This is done in ODR register:
+            // set pull-up => bit=1, set pull-down => bit = 0
+            if (mode == PullUp) {
+                gpio->ODR |= (0x01 << (pin_index)); // Set pull-up
+            } else{
+                gpio->ODR &= ~(0x01 << (pin_index)); // Set pull-down
+            }
             break;
         case OpenDrain:
             // Set open-drain for Output mode (General Purpose or Alternate Function)

libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32HG_STK3400/device.h

@@ -50,6 +50,11 @@
 
 #define DEVICE_LOWPOWERTIMER    1
 
+// Redefine OPEN_MAX from sys_limits.h to save on RAM.
+// Effect: maximum amount of file handlers = OPEN_MAX
+// This is not going to have an impact, since this is a RAM-limited part anyway.
+#define OPEN_MAX                24
+
 #include "objects.h"
 #include "Modules.h"
 #include "device_peripherals.h"

libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/TARGET_EFM32ZG_STK3200/device.h

@@ -50,6 +50,11 @@
 
 #define DEVICE_LOWPOWERTIMER    1
 
+// Redefine OPEN_MAX from sys_limits.h to save on RAM.
+// Effect: maximum amount of file handlers = OPEN_MAX
+// This is not going to have an impact, since this is a RAM-limited part anyway.
+#define OPEN_MAX                8
+
 #include "objects.h"
 #include "Modules.h"
 #include "device_peripherals.h"

workspace_tools/export/gcc_arm_efm32gg_stk3700.tmpl

@@ -23,7 +23,7 @@ OBJDUMP = $(GCC_BIN)arm-none-eabi-objdump
 SIZE 	= $(GCC_BIN)arm-none-eabi-size
 
 CPU = -mcpu=cortex-m3 -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
+CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections -fno-common -fomit-frame-pointer
 CC_FLAGS += -MMD -MP
 
 ifeq ($(DEBUG), 1)
@@ -53,7 +53,7 @@ clean:
 	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu99   $(INCLUDE_PATHS) -o $@ $<
 
 .cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
+	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -fno-rtti -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
 
 
 $(OBJ_FOLDER)$(PROJECT).axf: $(OBJECTS) $(SYS_OBJECTS)

workspace_tools/export/gcc_arm_efm32hg_stk3400.tmpl

@@ -23,7 +23,7 @@ OBJDUMP = $(GCC_BIN)arm-none-eabi-objdump
 SIZE 	= $(GCC_BIN)arm-none-eabi-size
 
 CPU = -mcpu=cortex-m0plus -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
+CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections -fno-common -fomit-frame-pointer
 CC_FLAGS += -MMD -MP
 
 ifeq ($(DEBUG), 1)
@@ -53,7 +53,7 @@ clean:
 	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu99   $(INCLUDE_PATHS) -o $@ $<
 
 .cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
+	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -fno-rtti -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
 
 
 $(OBJ_FOLDER)$(PROJECT).axf: $(OBJECTS) $(SYS_OBJECTS)

workspace_tools/export/gcc_arm_efm32lg_stk3600.tmpl

@@ -23,7 +23,7 @@ OBJDUMP = $(GCC_BIN)arm-none-eabi-objdump
 SIZE 	= $(GCC_BIN)arm-none-eabi-size
 
 CPU = -mcpu=cortex-m3 -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
+CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections -fno-common -fomit-frame-pointer
 CC_FLAGS += -MMD -MP
 
 ifeq ($(DEBUG), 1)
@@ -53,7 +53,7 @@ clean:
 	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu99   $(INCLUDE_PATHS) -o $@ $<
 
 .cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
+	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -fno-rtti -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
 
 
 $(OBJ_FOLDER)$(PROJECT).axf: $(OBJECTS) $(SYS_OBJECTS)

workspace_tools/export/gcc_arm_efm32wg_stk3800.tmpl

@@ -23,7 +23,7 @@ OBJDUMP = $(GCC_BIN)arm-none-eabi-objdump
 SIZE 	= $(GCC_BIN)arm-none-eabi-size
 
 CPU = -mcpu=cortex-m3 -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
+CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections -fno-common -fomit-frame-pointer
 CC_FLAGS += -MMD -MP
 
 ifeq ($(DEBUG), 1)
@@ -53,7 +53,7 @@ clean:
 	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu99   $(INCLUDE_PATHS) -o $@ $<
 
 .cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
+	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -fno-rtti -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
 
 
 $(OBJ_FOLDER)$(PROJECT).axf: $(OBJECTS) $(SYS_OBJECTS)

workspace_tools/export/gcc_arm_efm32zg_stk3200.tmpl

@@ -23,7 +23,7 @@ OBJDUMP = $(GCC_BIN)arm-none-eabi-objdump
 SIZE 	= $(GCC_BIN)arm-none-eabi-size
 
 CPU = -mcpu=cortex-m0plus -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
+CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections -fno-common -fomit-frame-pointer
 CC_FLAGS += -MMD -MP
 
 ifeq ($(DEBUG), 1)
@@ -53,7 +53,7 @@ clean:
 	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu99   $(INCLUDE_PATHS) -o $@ $<
 
 .cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
+	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) -fno-rtti -std=gnu++98 $(INCLUDE_PATHS) -o $@ $<
 
 
 $(OBJ_FOLDER)$(PROJECT).axf: $(OBJECTS) $(SYS_OBJECTS)

workspace_tools/export/simplicityv3_slsproj.tmpl

@@ -62,8 +62,10 @@
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.linker.base" optionId="gnu.c.link.option.ldflags" value="-Wl,--wrap=main"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.linker.base" optionId="gnu.cpp.link.option.flags" value="-Wl,--wrap=main"/>
 {# For debug build, don't apply optimizations #}
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base" optionId="gnu.c.compiler.option.optimization.level" value="gnu.c.optimization.level.none"/>
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base" optionId="gnu.c.compiler.option.misc.other" value="-c -fmessage-length=0 -fno-rtti -fno-exceptions -fno-common -fomit-frame-pointer"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.optimization.level" value="gnu.cpp.compiler.optimization.level.none"/>
-    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 "/>
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 -fno-rtti -fno-exceptions -fno-common -fomit-frame-pointer"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.misc.dialect" value="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.misc.dialect.default"/>
   </configuration>
   <configuration name="com.silabs.ide.si32.gcc.release#com.silabs.ide.si32.gcc:4.8.3.20131129" label="GNU ARM v4.8.3 - Release" stockConfigCompatibility="com.silabs.ide.toolchain.core.release">
@@ -105,8 +107,10 @@
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.linker.base" optionId="gnu.c.link.option.ldflags" value="-Wl,--wrap=main"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.linker.base" optionId="gnu.cpp.link.option.flags" value="-Wl,--wrap=main"/>
 {# Use optimize for size on release build #}
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base" optionId="gnu.c.compiler.option.optimization.level" value="gnu.c.optimization.level.size"/>
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.c.compiler.base" optionId="gnu.c.compiler.option.misc.other" value="-c -fmessage-length=0 -fno-rtti -fno-exceptions -fno-common -fomit-frame-pointer"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.optimization.level" value="gnu.cpp.compiler.optimization.level.size"/>
-    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 "/>
+    <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="gnu.cpp.compiler.option.other.other" value="-c -fmessage-length=0 -fno-rtti -fno-exceptions -fno-common -fomit-frame-pointer"/>
     <toolOption toolId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.base" optionId="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.misc.dialect" value="com.silabs.ide.si32.gcc.cdt.managedbuild.tool.gnu.cpp.compiler.misc.dialect.default"/>
   </configuration>
 </project>