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stm32samples/F0-nolib/inc/F0/stm32f0.h

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/*
* stm32f0.h
*
* Copyright 2017 Edward V. Emelianoff <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#pragma once
#ifndef __STM32F0_H__
#define __STM32F0_H__
#include <stdint.h>
#include "stm32f0xx.h"
#ifndef TRUE_INLINE
#define TRUE_INLINE __attribute__((always_inline)) static inline
#endif
#ifndef NULL
#define NULL (0)
#endif
// some good things from CMSIS
#define nop() __NOP()
/************************* RCC *************************/
// reset clocking registers
TRUE_INLINE void sysreset(void){
/* Reset the RCC clock configuration to the default reset state ------------*/
/* Set HSION bit */
RCC->CR |= (uint32_t)0x00000001;
#if defined (STM32F051x8) || defined (STM32F058x8)
/* Reset SW[1:0], HPRE[3:0], PPRE[2:0], ADCPRE and MCOSEL[2:0] bits */
RCC->CFGR &= (uint32_t)0xF8FFB80C;
#else
/* Reset SW[1:0], HPRE[3:0], PPRE[2:0], ADCPRE, MCOSEL[2:0], MCOPRE[2:0] and PLLNODIV bits */
RCC->CFGR &= (uint32_t)0x08FFB80C;
#endif /* STM32F051x8 or STM32F058x8 */
/* Reset HSEON, CSSON and PLLON bits */
RCC->CR &= (uint32_t)0xFEF6FFFF;
/* Reset HSEBYP bit */
RCC->CR &= (uint32_t)0xFFFBFFFF;
/* Reset PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */
RCC->CFGR &= (uint32_t)0xFFC0FFFF;
/* Reset PREDIV[3:0] bits */
RCC->CFGR2 &= (uint32_t)0xFFFFFFF0;
#if defined (STM32F072xB) || defined (STM32F078xB)
/* Reset USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW, USBSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFCFE2C;
#elif defined (STM32F071xB)
/* Reset USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFFCEAC;
#elif defined (STM32F091xC) || defined (STM32F098xx)
/* Reset USART3SW[1:0], USART2SW[1:0], USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFF0FEAC;
#elif defined (STM32F030x4) || defined (STM32F030x6) || defined (STM32F030x8) || defined (STM32F031x6) || defined (STM32F038xx) || defined (STM32F030xC)
/* Reset USART1SW[1:0], I2C1SW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFFFEEC;
#elif defined (STM32F051x8) || defined (STM32F058xx)
/* Reset USART1SW[1:0], I2C1SW, CECSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFFFEAC;
#elif defined (STM32F042x6) || defined (STM32F048xx)
/* Reset USART1SW[1:0], I2C1SW, CECSW, USBSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFFFE2C;
#elif defined (STM32F070x6) || defined (STM32F070xB)
/* Reset USART1SW[1:0], I2C1SW, USBSW and ADCSW bits */
RCC->CFGR3 &= (uint32_t)0xFFFFFE6C;
/* Set default USB clock to PLLCLK, since there is no HSI48 */
RCC->CFGR3 |= (uint32_t)0x00000080;
#else
#error "No target selected"
#endif
/* Disable all interrupts */
RCC->CIR = 0x00000000;
/* Reset HSI14 bit */
RCC->CR2 &= (uint32_t)0xFFFFFFFE;
// Enable Prefetch Buffer and set Flash Latency
FLASH->ACR = FLASH_ACR_PRFTBE | FLASH_ACR_LATENCY;
/* HCLK = SYSCLK */
RCC->CFGR |= RCC_CFGR_HPRE_DIV1;
/* PCLK = HCLK */
RCC->CFGR |= RCC_CFGR_PPRE_DIV1;
/* PLL configuration = (HSI/2) * 12 = ~48 MHz */
RCC->CFGR &= ~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLMUL);
RCC->CFGR |= RCC_CFGR_PLLMUL12;
/* Enable PLL */
RCC->CR |= RCC_CR_PLLON;
/* Wait till PLL is ready */
while((RCC->CR & RCC_CR_PLLRDY) == 0){}
/* Select PLL as system clock source */
RCC->CFGR &= ~RCC_CFGR_SW;
RCC->CFGR |= RCC_CFGR_SW_PLL;
/* Wait till PLL is used as system clock source */
while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_PLL){}
}
/* wrong
TRUE_INLINE void StartHSE(){
// disable PLL
RCC->CR &= ~RCC_CR_PLLON;
RCC->CR |= RCC_CR_HSEON;
while ((RCC->CIR & RCC_CIR_HSERDYF) == 0);
RCC->CIR |= RCC_CIR_HSERDYC; // clear rdy flag
// PLL configuration = (HSE) * 12 = ~48 MHz
RCC->CFGR &= ~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLMUL);
RCC->CFGR |= RCC_CFGR_PLLSRC_HSE_PREDIV | RCC_CFGR_PLLMUL12;
RCC->CR |= RCC_CR_PLLON;
while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_PLL){}
} */
#if defined (STM32F042x6) || defined (STM32F072xb)
TRUE_INLINE void StartHSI48(){
RCC->APB1ENR |= RCC_APB1ENR_CRSEN | RCC_APB1ENR_USBEN; // enable CRS (hsi48 sync) & USB
RCC->CFGR3 &= ~RCC_CFGR3_USBSW; // reset USB
RCC->CR2 |= RCC_CR2_HSI48ON; // turn ON HSI48
uint32_t tmout = 16000000;
while(!(RCC->CR2 & RCC_CR2_HSI48RDY)){if(--tmout == 0) break;}
FLASH->ACR = FLASH_ACR_PRFTBE | FLASH_ACR_LATENCY;
CRS->CFGR &= ~CRS_CFGR_SYNCSRC;
CRS->CFGR |= CRS_CFGR_SYNCSRC_1; // USB SOF selected as sync source
CRS->CR |= CRS_CR_AUTOTRIMEN; // enable auto trim
CRS->CR |= CRS_CR_CEN; // enable freq counter & block CRS->CFGR as read-only
RCC->CFGR |= RCC_CFGR_SW;
}
#endif
/************************* GPIO *************************/
/******************* Bit definition for GPIO_MODER register *****************/
// _AI - analog inpt, _O - general output, _AF - alternate function
#define GPIO_MODER_MODER0_AI ((uint32_t)0x00000003)
#define GPIO_MODER_MODER0_O ((uint32_t)0x00000001)
#define GPIO_MODER_MODER0_AF ((uint32_t)0x00000002)
#define GPIO_MODER_MODER1_AI ((uint32_t)0x0000000C)
#define GPIO_MODER_MODER1_O ((uint32_t)0x00000004)
#define GPIO_MODER_MODER1_AF ((uint32_t)0x00000008)
#define GPIO_MODER_MODER2_AI ((uint32_t)0x00000030)
#define GPIO_MODER_MODER2_O ((uint32_t)0x00000010)
#define GPIO_MODER_MODER2_AF ((uint32_t)0x00000020)
#define GPIO_MODER_MODER3_AI ((uint32_t)0x000000C0)
#define GPIO_MODER_MODER3_O ((uint32_t)0x00000040)
#define GPIO_MODER_MODER3_AF ((uint32_t)0x00000080)
#define GPIO_MODER_MODER4_AI ((uint32_t)0x00000300)
#define GPIO_MODER_MODER4_O ((uint32_t)0x00000100)
#define GPIO_MODER_MODER4_AF ((uint32_t)0x00000200)
#define GPIO_MODER_MODER5_AI ((uint32_t)0x00000C00)
#define GPIO_MODER_MODER5_O ((uint32_t)0x00000400)
#define GPIO_MODER_MODER5_AF ((uint32_t)0x00000800)
#define GPIO_MODER_MODER6_AI ((uint32_t)0x00003000)
#define GPIO_MODER_MODER6_O ((uint32_t)0x00001000)
#define GPIO_MODER_MODER6_AF ((uint32_t)0x00002000)
#define GPIO_MODER_MODER7_AI ((uint32_t)0x0000C000)
#define GPIO_MODER_MODER7_O ((uint32_t)0x00004000)
#define GPIO_MODER_MODER7_AF ((uint32_t)0x00008000)
#define GPIO_MODER_MODER8_AI ((uint32_t)0x00030000)
#define GPIO_MODER_MODER8_O ((uint32_t)0x00010000)
#define GPIO_MODER_MODER8_AF ((uint32_t)0x00020000)
#define GPIO_MODER_MODER9_AI ((uint32_t)0x000C0000)
#define GPIO_MODER_MODER9_O ((uint32_t)0x00040000)
#define GPIO_MODER_MODER9_AF ((uint32_t)0x00080000)
#define GPIO_MODER_MODER10_AI ((uint32_t)0x00300000)
#define GPIO_MODER_MODER10_O ((uint32_t)0x00100000)
#define GPIO_MODER_MODER10_AF ((uint32_t)0x00200000)
#define GPIO_MODER_MODER11_AI ((uint32_t)0x00C00000)
#define GPIO_MODER_MODER11_O ((uint32_t)0x00400000)
#define GPIO_MODER_MODER11_AF ((uint32_t)0x00800000)
#define GPIO_MODER_MODER12_AI ((uint32_t)0x03000000)
#define GPIO_MODER_MODER12_O ((uint32_t)0x01000000)
#define GPIO_MODER_MODER12_AF ((uint32_t)0x02000000)
#define GPIO_MODER_MODER13_AI ((uint32_t)0x0C000000)
#define GPIO_MODER_MODER13_O ((uint32_t)0x04000000)
#define GPIO_MODER_MODER13_AF ((uint32_t)0x08000000)
#define GPIO_MODER_MODER14_AI ((uint32_t)0x30000000)
#define GPIO_MODER_MODER14_O ((uint32_t)0x10000000)
#define GPIO_MODER_MODER14_AF ((uint32_t)0x20000000)
#define GPIO_MODER_MODER15_AI ((uint32_t)0xC0000000)
#define GPIO_MODER_MODER15_O ((uint32_t)0x40000000)
#define GPIO_MODER_MODER15_AF ((uint32_t)0x80000000)
#define pin_toggle(gpioport, gpios) do{ \
register uint32_t __port = gpioport->ODR; \
gpioport->BSRR = ((__port & gpios) << 16) | (~__port & gpios);}while(0)
#define pin_set(gpioport, gpios) do{gpioport->BSRR = gpios;}while(0)
#define pin_clear(gpioport, gpios) do{gpioport->BRR = gpios;}while(0)
#define pin_read(gpioport, gpios) ((gpioport->IDR & gpios) ? 1 : 0)
#define pin_write(gpioport, gpios) do{gpioport->ODR = gpios;}while(0)
/************************* ADC *************************/
/* inner termometer calibration values
* Temp = (V30 - Vsense)/Avg_Slope + 30
* Avg_Slope = (V30 - V110) / (110 - 30)
*/
#define TEMP110_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FFFF7C2))
#define TEMP30_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FFFF7B8))
// VDDA_Actual = 3.3V * VREFINT_CAL / average vref value
#define VREFINT_CAL_ADDR ((uint16_t*) ((uint32_t) 0x1FFFF7BA))
#define VDD_CALIB ((uint16_t) (330))
#define VDD_APPLI ((uint16_t) (300))
/************************* USART *************************/
#define USART_CR2_ADD_SHIFT 24
// set address/character match value
#define USART_CR2_ADD_VAL(x) ((x) << USART_CR2_ADD_SHIFT)
/************************* IWDG *************************/
#define IWDG_REFRESH (uint32_t)(0x0000AAAA)
#define IWDG_WRITE_ACCESS (uint32_t)(0x00005555)
#define IWDG_START (uint32_t)(0x0000CCCC)
//#define do{}while(0)
#endif // __STM32F0_H__
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