Files
Upsilon/bootloader/drivers/stm32_drivers.cpp
2022-04-27 15:44:42 +02:00

72 lines
3.5 KiB
C++

#include "stm32_drivers.h"
/**
* THIS CODE COMES FROM THE STM32_HAL LIBRARY (LICENSE ABOVE) AND HAVE BEEN MODIFIED
* WE USE ONLY THE HAL_deinit, RCC_deinit and systick_deninit FUNCTIONS AND ONLY COPIED THE CODE NEEDED.
* WE NEEDED THIS CODE TO BE ABLE TO BOOT THE STM32 BOOTLOADER
*/
/*
This software component is provided to you as part of a software package and
applicable license terms are in the Package_license file. If you received this
software component outside of a package or without applicable license terms,
the terms of the BSD-3-Clause license shall apply.
You may obtain a copy of the BSD-3-Clause at:
https://opensource.org/licenses/BSD-3-Clause
*/
void STM32::rcc_deinit() {
SET_BIT(STM_32_RCC->CR, (0x1UL << (0U)));
while (READ_BIT(STM_32_RCC->CR, (0x1UL << (1U))) == 0) {}
SET_BIT(STM_32_RCC->CR, (0x10UL << (3U)));
CLEAR_REG(STM_32_RCC->CFGR);
while (READ_BIT(STM_32_RCC->CFGR, (0x3UL << (2U))) != 0) {}
CLEAR_BIT(STM_32_RCC->CR, (0x1UL << (16U)) | (0x1UL << (18U)) | (0x1UL << (19U)));
while (READ_BIT(STM_32_RCC->CR, (0x1UL << (17U))) != 0) {}
CLEAR_BIT(STM_32_RCC->CR, (0x1UL << (24U)));
while (READ_BIT(STM_32_RCC->CR, (0x1UL << (25U))) != 0) {}
CLEAR_BIT(STM_32_RCC->CR, (0x1UL << (26U)));
while (READ_BIT(STM_32_RCC->CR, (0x1UL << (27U))) != 0) {}
CLEAR_BIT(STM_32_RCC->CR, (0x1UL << (28U)));
while (READ_BIT(STM_32_RCC->CR, (0x1UL << (29U))) != 0) {}
STM_32_RCC->PLLCFGR = ((0x10UL << (0x0U)) | (0x040UL << (6U)) | (0x080UL << (6U)) | (0x4UL << (24U)) | 0x20000000U);
STM_32_RCC->PLLI2SCFGR = ((0x040UL << (6U)) | (0x080UL << (6U)) | (0x4UL << (24U)) | (0x2UL << (28U)));
STM_32_RCC->PLLSAICFGR = ((0x040UL << (6U)) | (0x080UL << (6U)) | (0x4UL << (24U)) | 0x20000000U);
CLEAR_BIT(STM_32_RCC->CIR, ((0x1UL << (8U)) | (0x1UL << (9U)) | (0x1UL << (10U)) | (0x1UL << (11U)) | (0x1UL << (12U)) | (0x1UL << (13U)) | (0x1UL << (14U))));
SET_BIT(STM_32_RCC->CIR, ((0x1UL << (16U)) | (0x1UL << (17U)) | (0x1UL << (18U)) | (0x1UL << (19U)) | (0x1UL << (20U)) | (0x1UL << (21U)) | (0x1UL << (22U)) | (0x1UL << (23U))));
CLEAR_BIT(STM_32_RCC->CSR, ((0x1UL << (0U))));
SET_BIT(STM_32_RCC->CSR, ((0x1UL << (24U))));
uint32_t sysclock = ((uint32_t)16000000U);
uint32_t a = ((sysclock / 1000U));
uint32_t b = 15U;
STM_32_SysTick->LOAD = (uint32_t)(a - 1UL);
STM_32_SCB->SHPR[(((uint32_t)(-1))&0xFUL)-4UL] = (uint8_t)((((1UL << 4U)-1UL) << (8U - 4UL)) & (uint32_t)0xFFUL);
STM_32_SysTick->VAL = 0U;
STM_32_SysTick->CTRL = (1UL << 2U) | (1UL << 1U) | (1UL);
uint32_t c = ((uint32_t)((STM_32_SCB->AIRCR & (7UL << 8U)) >> 8U));
uint32_t d = (c & (uint32_t)0x07UL);
uint32_t e;
uint32_t f;
e = ((7UL - d) > (uint32_t)(4UL)) ? (uint32_t)(4UL) : (7UL - d);
f = ((d + (uint32_t)(4UL)) < (uint32_t)(7UL)) ? (uint32_t)(0UL) : (uint32_t)((d - 7UL) + (uint32_t)(4UL));
uint32_t g = (((b & (uint32_t)((1UL << (e)) - 1UL)) << f) | ((0UL & (uint32_t)((1UL << (f)) - 1UL))));
STM_32_SCB->SHPR[(((uint32_t)(-1))&0xFUL)-4UL] = (uint8_t)((g << (8U - 4UL)) & (uint32_t)0xFFUL);
}
void STM32::hal_deinit() {
STM_32_RCC->APB1RSTR = 0xFFFFFFFFU;
STM_32_RCC->APB1RSTR = 0x00U;
STM_32_RCC->APB2RSTR = 0xFFFFFFFFU;
STM_32_RCC->APB2RSTR = 0x00U;
STM_32_RCC->AHB1RSTR = 0xFFFFFFFFU;
STM_32_RCC->AHB1RSTR = 0x00U;
STM_32_RCC->AHB2RSTR = 0xFFFFFFFFU;
STM_32_RCC->AHB2RSTR = 0x00U;
STM_32_RCC->AHB3RSTR = 0xFFFFFFFFU;
STM_32_RCC->AHB3RSTR = 0x00U;
}
void STM32::systick_deinit() {
STM_32_SysTick->CTRL = STM_32_SysTick->LOAD = STM_32_SysTick->VAL = 0;
}