--temp

2023-07-20 13:55:29 +03:00
parent 96e193a7f2
commit 8c73cea539
331 changed files with 120 additions and 455964 deletions
--- a/ARMCM0_STM32G0/timer.c
+++ b/ARMCM0_STM32G0/timer.c
@@ -0,0 +1,128 @@
+/************************************************************************************//**
+* \file         Source/ARMCM0_STM32G0/timer.c
+* \brief        Bootloader timer driver source file.
+* \ingroup      Target_ARMCM0_STM32G0
+* \internal
+*----------------------------------------------------------------------------------------
+*                          C O P Y R I G H T
+*----------------------------------------------------------------------------------------
+*   Copyright (c) 2019  by Feaser    http://www.feaser.com    All rights reserved
+*
+*----------------------------------------------------------------------------------------
+*                            L I C E N S E
+*----------------------------------------------------------------------------------------
+* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
+* modify it under the terms of the GNU General Public License as published by the Free
+* Software Foundation, either version 3 of the License, or (at your option) any later
+* version.
+*
+* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+* PURPOSE. See the GNU General Public License for more details.
+*
+* You have received a copy of the GNU General Public License along with OpenBLT. It
+* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
+*
+* \endinternal
+****************************************************************************************/
+
+/****************************************************************************************
+* Include files
+****************************************************************************************/
+#include "boot.h"                                /* bootloader generic header          */
+#include "stm32g0xx.h"                           /* STM32 CPU and HAL header           */
+
+
+/****************************************************************************************
+* Local data declarations
+****************************************************************************************/
+/** \brief Local variable for storing the number of milliseconds that have elapsed since
+ *         startup.
+ */
+static blt_int32u millisecond_counter;
+
+
+/************************************************************************************//**
+** \brief     Initializes the polling based millisecond timer driver.
+** \return    none.
+**
+****************************************************************************************/
+void TimerInit(void)
+{
+  /* Reset the timer configuration. */
+  TimerReset();
+  /* configure the systick frequency as a 1 ms event generator */
+  SysTick->LOAD = BOOT_CPU_SYSTEM_SPEED_KHZ - 1;
+  /* reset the current counter value */
+  SysTick->VAL = 0;
+  /* select core clock as source and enable the timer */
+  SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_ENABLE_Msk;
+  /* reset the millisecond counter value */
+  millisecond_counter = 0;
+} /*** end of TimerInit ***/
+
+
+/************************************************************************************//**
+** \brief     Reset the timer by placing the timer back into it's default reset
+**            configuration.
+** \return    none.
+**
+****************************************************************************************/
+void TimerReset(void)
+{
+  /* set the systick's registers back into the default reset value. */
+  SysTick->CTRL = 0;
+  SysTick->LOAD = 0;
+  SysTick->VAL = 0;
+} /* end of TimerReset */
+
+
+/************************************************************************************//**
+** \brief     Updates the millisecond timer.
+** \return    none.
+**
+****************************************************************************************/
+void TimerUpdate(void)
+{
+  /* check if the millisecond event occurred */
+  if ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) != 0)
+  {
+    /* Increment the millisecond counter. */
+    millisecond_counter++;
+  }
+} /*** end of TimerUpdate ***/
+
+
+/************************************************************************************//**
+** \brief     Obtains the counter value of the millisecond timer.
+** \return    Current value of the millisecond timer.
+**
+****************************************************************************************/
+blt_int32u TimerGet(void)
+{
+  /* Updating timer here allows this function to be called in a loop with timeout
+   * detection.
+   */
+  TimerUpdate();
+  /* Read and return the amount of milliseconds that passed since initialization. */
+  return millisecond_counter;
+} /*** end of TimerGet ***/
+
+
+/************************************************************************************//**
+** \brief     Override for the HAL driver's GetTick() functionality. This is needed
+**            because the bootloader doesn't use interrupts, but the HAL's tick
+**            functionality assumes that it does. This will cause the HAL_Delay()
+**            function to not work properly. As a result of this override, the HAL's
+**            tick functionality works in polling mode.
+** \return    Current value of the millisecond timer.
+**
+****************************************************************************************/
+uint32_t HAL_GetTick(void)
+{
+  /* Link to the bootloader's 1ms timer. */
+  return TimerGet();
+} /*** end of HAL_GetTick ***/
+
+
+/*********************************** end of timer.c ************************************/