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// 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 <array>
#include "FreeRTOS.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"
namespace {
std::array<StackType_t, configMINIMAL_STACK_SIZE> freertos_idle_stack;
StaticTask_t freertos_idle_tcb;
std::array<StackType_t, configTIMER_TASK_STACK_DEPTH> freertos_timer_stack;
StaticTask_t freertos_timer_tcb;
std::array<char, configMAX_TASK_NAME_LEN> temp_thread_name_buffer;
} // namespace
// 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; }
// Required for configCHECK_FOR_STACK_OVERFLOW.
extern "C" void vApplicationStackOverflowHook(TaskHandle_t, char* pcTaskName) {
pw::string::Copy(pcTaskName, temp_thread_name_buffer);
PW_CRASH("Stack OVF for task %s", temp_thread_name_buffer.data());
}
// Required for configUSE_TIMERS.
extern "C" void vApplicationGetTimerTaskMemory(
StaticTask_t** ppxTimerTaskTCBBuffer,
StackType_t** ppxTimerTaskStackBuffer,
uint32_t* pulTimerTaskStackSize) {
*ppxTimerTaskTCBBuffer = &freertos_timer_tcb;
*ppxTimerTaskStackBuffer = freertos_timer_stack.data();
*pulTimerTaskStackSize = freertos_timer_stack.size();
}
extern "C" void vApplicationGetIdleTaskMemory(
StaticTask_t** ppxIdleTaskTCBBuffer,
StackType_t** ppxIdleTaskStackBuffer,
uint32_t* pulIdleTaskStackSize) {
*ppxIdleTaskTCBBuffer = &freertos_idle_tcb;
*ppxIdleTaskStackBuffer = freertos_idle_stack.data();
*pulIdleTaskStackSize = freertos_idle_stack.size();
}
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()`.
extern "C" 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;
}
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