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restructuring

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This commit is contained in:
Edward Emelianov
2022-03-10 11:04:14 +03:00
parent 29560b7c0c
commit 733dbd75d2
1758 changed files with 14 additions and 26855 deletions
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F0:F030,F042,F072/TM1637/hardware.c Normal file
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/*
* This file is part of the TM1637 project.
* Copyright 2019 Edward Emelianov <eddy@sao.ru>.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "hardware.h"
#include "usart.h"
/**
* @brief gpio_setup - setup GPIOs for external IO
* GPIO pinout:
* PC13 - open drain - onboard LED (blinks when board works)
*/
static inline void gpio_setup(){
// Enable clocks to the GPIO subsystems
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN | RCC_AHBENR_GPIOCEN;
GPIOC->MODER = GPIO_MODER_MODER13_O;
GPIOC->OTYPER = GPIO_OTYPER_OT_13;
/*
// PA6/7 - AF; PB1 - AF
GPIOA->MODER = GPIO_MODER_MODER4_O | GPIO_MODER_MODER6_AF | GPIO_MODER_MODER7_AF;
GPIOA->OTYPER = GPIO_OTYPER_OT_4;
// alternate functions:
// PA6 - TIM3_CH1, PA7 - TIM3_CH2
GPIOA->AFR[0] = (GPIOA->AFR[0] &~ (GPIO_AFRL_AFRL6 | GPIO_AFRL_AFRL7)) \
| (1 << (6 * 4)) | (1 << (7 * 4));
*/
}
static inline void i2c_setup(){
I2C1->CR1 = 0;
/*
* GPIO Resources: I2C1_SCL - PB6 (AF1), I2C1_SDA - PB7 (AF1)
*/
GPIOB->MODER |= GPIO_MODER_MODER6_AF | GPIO_MODER_MODER7_AF; // alternate function
GPIOB->AFR[0] = (GPIOB->AFR[0] &~ (GPIO_AFRL_AFRL6 | GPIO_AFRL_AFRL7)) \
| (1 << (6 * 4)) | (1 << (7 * 4));
// GPIOB->OTYPER |= GPIO_OTYPER_OT_6 | GPIO_OTYPER_OT_7; // opendrain
// I2C
RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; // timing
RCC->CFGR3 |= RCC_CFGR3_I2C1SW; // use sysclock for timing
// 100kHz
// Clock = 6MHz, 0.16(6)us, need 5us (*30)
// PRESC=4 (f/5), SCLDEL=0 (t_SU=5/6us), SDADEL=0 (t_HD=5/6us), SCLL,SCLH=14 (2.(3)us)
I2C1->TIMINGR = (0xB<<28) | (4<<20) | (2<<16) | (0x12<<8) | (0x11);
I2C1->CR1 = I2C_CR1_PE; // Enable I2C
}
void hw_setup(){
sysreset();
gpio_setup();
i2c_setup();
USART1_config();
}