Diff: targets/hal/TARGET_STM/TARGET_STM32F0/us_ticker.c

Revision:

638:e94dc43c7733

Parent:

636:cdb71f051ab2

--- a/targets/hal/TARGET_STM/TARGET_STM32F0/us_ticker.c	Thu Apr 14 06:45:56 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,291 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2014, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#include <stddef.h>
-#include "us_ticker_api.h"
-#include "PeripheralNames.h"
-
-
-#if defined(TARGET_STM32F030R8) || defined(TARGET_STM32F070RB)
-
-// Timer selection
-#define TIM_MST TIM1
-
-static TIM_HandleTypeDef TimMasterHandle;
-static int us_ticker_inited = 0;
-
-volatile uint32_t SlaveCounter = 0;
-volatile uint32_t oc_int_part = 0;
-volatile uint16_t oc_rem_part = 0;
-
-void set_compare(uint16_t count) {
-    TimMasterHandle.Instance = TIM_MST;
-    // Set new output compare value
-    __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, count);
-    // Enable IT
-    __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-void us_ticker_init(void) {
-    if (us_ticker_inited) return;
-    us_ticker_inited = 1;
-
-    HAL_InitTick(0); // The passed value is not used
-}
-
-uint32_t us_ticker_read() {
-    uint32_t counter, counter2;
-    if (!us_ticker_inited) us_ticker_init();
-    // A situation might appear when Master overflows right after Slave is read and before the
-    // new (overflowed) value of Master is read. Which would make the code below consider the
-    // previous (incorrect) value of Slave and the new value of Master, which would return a
-    // value in the past. Avoid this by computing consecutive values of the timer until they
-    // are properly ordered.
-    counter = (uint32_t)(SlaveCounter << 16);
-    counter += TIM_MST->CNT;
-    while (1) {
-        counter2 = (uint32_t)(SlaveCounter << 16);
-        counter2 += TIM_MST->CNT;
-        if (counter2 > counter) {
-            break;
-        }
-        counter = counter2;
-    }
-    return counter2;
-}
-
-void us_ticker_set_interrupt(timestamp_t timestamp) {
-    int delta = (int)((uint32_t)timestamp - us_ticker_read());
-    uint16_t cval = TIM_MST->CNT;
-
-    if (delta <= 0) { // This event was in the past
-        us_ticker_irq_handler();
-    } else {
-        oc_int_part = (uint32_t)(delta >> 16);
-        oc_rem_part = (uint16_t)(delta & 0xFFFF);
-        if (oc_rem_part <= (0xFFFF - cval)) {
-            set_compare(cval + oc_rem_part);
-            oc_rem_part = 0;
-        } else {
-            set_compare(0xFFFF);
-            oc_rem_part = oc_rem_part - (0xFFFF - cval);
-        }
-    }
-}
-
-void us_ticker_disable_interrupt(void) {
-    TimMasterHandle.Instance = TIM_MST;
-    __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-void us_ticker_clear_interrupt(void) {
-    TimMasterHandle.Instance = TIM_MST;
-    if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
-        __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
-    }
-}
-
-#elif defined (TARGET_STM32F051R8)
-
-// Timer selection:
-#define TIM_MST      TIM1
-#define TIM_MST_UP_IRQ     TIM1_BRK_UP_TRG_COM_IRQn
-#define TIM_MST_OC_IRQ     TIM1_CC_IRQn
-#define TIM_MST_RCC  __TIM1_CLK_ENABLE()
-
-static TIM_HandleTypeDef TimMasterHandle;
-
-
-static int us_ticker_inited = 0;
-static volatile uint32_t SlaveCounter = 0;
-static volatile uint32_t oc_int_part = 0;
-static volatile uint16_t oc_rem_part = 0;
-
-void set_compare(uint16_t count) {
-    TimMasterHandle.Instance = TIM_MST;
-
-    // Set new output compare value
-    __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, count);
-    // Enable IT
-    __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-// Used to increment the slave counter
-static void tim_update_irq_handler(void) {
-    TimMasterHandle.Instance = TIM_MST;
-
-    // Clear Update interrupt flag
-    if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
-        __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE);
-        SlaveCounter++;
-    }
-}
-
-// Used by interrupt system
-static void tim_oc_irq_handler(void) {
-    uint16_t cval = TIM_MST->CNT;
-    TimMasterHandle.Instance = TIM_MST;
-
-    // Clear CC1 interrupt flag
-    if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
-        __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
-    }
-    if (oc_rem_part > 0) {
-        set_compare(oc_rem_part); // Finish the remaining time left
-        oc_rem_part = 0;
-    } else {
-        if (oc_int_part > 0) {
-            set_compare(0xFFFF);
-            oc_rem_part = cval; // To finish the counter loop the next time
-            oc_int_part--;
-        } else {
-            us_ticker_irq_handler();
-        }
-    }
-
-}
-
-void us_ticker_init(void) {
-
-    if (us_ticker_inited) return;
-    us_ticker_inited = 1;
-
-    // Enable timer clock
-    TIM_MST_RCC;
-
-    // Configure time base
-    TimMasterHandle.Instance = TIM_MST;
-    TimMasterHandle.Init.Period        = 0xFFFF;
-    TimMasterHandle.Init.Prescaler         = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 �s tick
-    TimMasterHandle.Init.ClockDivision     = 0;
-    TimMasterHandle.Init.CounterMode       = TIM_COUNTERMODE_UP;
-    HAL_TIM_Base_Init(&TimMasterHandle);
-
-    // Configure interrupts
-    __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE);
-
-    // Update interrupt used for 32-bit counter
-    NVIC_SetVector(TIM_MST_UP_IRQ, (uint32_t)tim_update_irq_handler);
-    NVIC_EnableIRQ(TIM_MST_UP_IRQ);
-
-    // Output compare interrupt used for timeout feature
-    NVIC_SetVector(TIM_MST_OC_IRQ, (uint32_t)tim_oc_irq_handler);
-    NVIC_EnableIRQ(TIM_MST_OC_IRQ);
-
-    // Enable timer
-    HAL_TIM_Base_Start(&TimMasterHandle);
-}
-
-uint32_t us_ticker_read() {
-    uint32_t counter, counter2;
-    if (!us_ticker_inited) us_ticker_init();
-    // A situation might appear when Master overflows right after Slave is read and before the
-    // new (overflowed) value of Master is read. Which would make the code below consider the
-    // previous (incorrect) value of Slave and the new value of Master, which would return a
-    // value in the past. Avoid this by computing consecutive values of the timer until they
-    // are properly ordered.
-    counter = (uint32_t)(SlaveCounter << 16);
-    counter += TIM_MST->CNT;
-    while (1) {
-        counter2 = (uint32_t)(SlaveCounter << 16);
-        counter2 += TIM_MST->CNT;
-        if (counter2 > counter) {
-            break;
-        }
-        counter = counter2;
-    }
-    return counter2;
-}
-
-void us_ticker_set_interrupt(timestamp_t timestamp) {
-    int delta = (int)((uint32_t)timestamp - us_ticker_read());
-    uint16_t cval = TIM_MST->CNT;
-
-    if (delta <= 0) { // This event was in the past
-        us_ticker_irq_handler();
-    } else {
-        oc_int_part = (uint32_t)(delta >> 16);
-        oc_rem_part = (uint16_t)(delta & 0xFFFF);
-        if (oc_rem_part <= (0xFFFF - cval)) {
-            set_compare(cval + oc_rem_part);
-            oc_rem_part = 0;
-        } else {
-            set_compare(0xFFFF);
-            oc_rem_part = oc_rem_part - (0xFFFF - cval);
-        }
-    }
-}
-
-void us_ticker_disable_interrupt(void) {
-    TimMasterHandle.Instance = TIM_MST;
-    __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-void us_ticker_clear_interrupt(void) {
-    TimMasterHandle.Instance = TIM_MST;
-    if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
-        __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
-    }
-}
-
-#else
-
-// 32-bit timer selection
-#define TIM_MST TIM2
-
-static TIM_HandleTypeDef TimMasterHandle;
-static int us_ticker_inited = 0;
-
-void us_ticker_init(void) {
-    if (us_ticker_inited) return;
-    us_ticker_inited = 1;
-
-    TimMasterHandle.Instance = TIM_MST;
-
-    HAL_InitTick(0); // The passed value is not used
-}
-
-uint32_t us_ticker_read() {
-    if (!us_ticker_inited) us_ticker_init();
-    return TIM_MST->CNT;
-}
-
-void us_ticker_set_interrupt(timestamp_t timestamp) {
-    // Set new output compare value
-    __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
-    // Enable IT
-    __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-void us_ticker_disable_interrupt(void) {
-    __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-
-void us_ticker_clear_interrupt(void) {
-    __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
-}
-#endif