// Copyright 2021 The Pigweed Authors // // Licensed under the Apache License, Version 2.0 (the "License"); you may not // use this file except in compliance with the License. You may obtain a copy of // the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the // License for the specific language governing permissions and limitations under // the License. #include "pw_boot/boot.h" #include #include "FreeRTOS.h" #include "pw_assert/check.h" #include "pw_boot_cortex_m/boot.h" #include "pw_malloc/malloc.h" #include "pw_preprocessor/compiler.h" #include "pw_string/util.h" #include "pw_sys_io_stm32cube/init.h" #include "pw_system/init.h" #include "stm32f4xx.h" #include "task.h" // Initializes clock to its max, 180Mhz. Note that this naming follows CubeMX's // naming out of convention. It's not required that this target provides a // symbol named SystemClock_Config. This function shares the same purpose as // the symbol of the same name that is generated by CubeMX. extern "C" void SystemClock_Config() { RCC_OscInitTypeDef RCC_OscInitStruct = {}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {}; __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 4; RCC_OscInitStruct.PLL.PLLN = 180; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 8; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { pw_boot_PostMain(); } // OverDrive required for operation > 168Mhz if (HAL_PWREx_EnableOverDrive() != HAL_OK) { pw_boot_PostMain(); } RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK) { pw_boot_PostMain(); } } // Functions needed when configGENERATE_RUN_TIME_STATS is on. extern "C" void configureTimerForRunTimeStats(void) {} extern "C" unsigned long getRunTimeCounterValue(void) { return uwTick; } extern "C" void pw_boot_PreStaticMemoryInit() {} extern "C" void pw_boot_PreStaticConstructorInit() { // Provided by STMicroelectronics SDK. Can be configured to be provided // elsewhere by changing pw_third_party_stm32cube_CMSIS_INIT. SystemInit(); // Provided by the STMicroelectronics SDK. HAL_Init(); // Typically provided by CubeMX codegen, SystemClock_Config() is instead // provided as part of this target. SystemClock_Config(); #if PW_MALLOC_ACTIVE pw_MallocInit(&pw_boot_heap_low_addr, &pw_boot_heap_high_addr); #endif // PW_MALLOC_ACTIVE pw_sys_io_Init(); } // TODO(amontanez): pw_boot_PreMainInit() should get renamed to // pw_boot_FinalizeBoot or similar when main() is removed. extern "C" void pw_boot_PreMainInit() { pw::system::Init(); vTaskStartScheduler(); PW_UNREACHABLE; } // This `main()` stub prevents another main function from being linked since // this target deliberately doesn't run `main()`. int main() {} extern "C" PW_NO_RETURN void pw_boot_PostMain() { // In case main() returns, just sit here until the device is reset. while (true) { } PW_UNREACHABLE; }