2014-12-28 06:29:08 -08:00
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/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2010 Perry Hung.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @brief Generic board initialization routines.
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*
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* By default, we bring up all Maple boards to 72MHz, clocked off the
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* PLL, driven by the 8MHz external crystal. AHB and APB2 are clocked
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* at 72MHz. APB1 is clocked at 36MHz.
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*/
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#include "boards.h"
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#include "flash.h"
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#include "rcc.h"
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#include "nvic.h"
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#include "systick.h"
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#include "gpio.h"
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#include "adc.h"
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#include "timer.h"
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#include "usb.h"
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#ifdef STM32F2
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//#include "usbF4.h"
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#endif
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static void setupFlash(void);
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static void setupClocks(void);
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static void setupNVIC(void);
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static void setupADC(void);
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static void setupTimers(void);
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void init(void) {
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setupFlash();
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setupClocks();
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setupNVIC();
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systick_init(SYSTICK_RELOAD_VAL);
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gpio_init_all();
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#ifdef STM32F2
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rcc_clk_enable(RCC_SYSCFG);
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#else
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afio_init();
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#endif
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boardInit();
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setupADC();
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setupTimers();
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//setupUSB();
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}
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/* You could farm this out to the files in boards/ if e.g. it takes
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* too long to test on Maple Native (all those FSMC pins...). */
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bool boardUsesPin(uint8 pin) {
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for (int i = 0; i < BOARD_NR_USED_PINS; i++) {
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if (pin == boardUsedPins[i]) {
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return true;
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}
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}
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return false;
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}
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static void setupFlash(void) {
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#ifndef STM32F2
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// for F2 and F4 CPUs this is done in SetupClock...(), e.g. in SetupClock168MHz()
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flash_enable_prefetch();
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flash_set_latency(FLASH_WAIT_STATE_2);
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#endif
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}
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/*
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* Clock setup. Note that some of this only takes effect if we're
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* running bare metal and the bootloader hasn't done it for us
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* already.
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*
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* If you change this function, you MUST change the file-level Doxygen
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* comment above.
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*/
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static void setupClocks() {
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rcc_clk_init(RCC_CLKSRC_PLL, RCC_PLLSRC_HSE, RCC_PLLMUL_9);
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rcc_set_prescaler(RCC_PRESCALER_AHB, RCC_AHB_SYSCLK_DIV_1);
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rcc_set_prescaler(RCC_PRESCALER_APB1, RCC_APB1_HCLK_DIV_2);
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rcc_set_prescaler(RCC_PRESCALER_APB2, RCC_APB2_HCLK_DIV_1);
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}
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static void setupNVIC() {
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#ifdef VECT_TAB_FLASH
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nvic_init(USER_ADDR_ROM, 0);
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#elif defined VECT_TAB_RAM
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nvic_init(USER_ADDR_RAM, 0);
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#elif defined VECT_TAB_BASE
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nvic_init((uint32)0x08000000, 0);
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#else
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#error "You must select a base address for the vector table."
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#endif
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}
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static void adcDefaultConfig(const adc_dev* dev);
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static void setupADC() {
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#ifdef STM32F2
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setupADC_F2();
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#else
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rcc_set_prescaler(RCC_PRESCALER_ADC, RCC_ADCPRE_PCLK_DIV_6);
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#endif
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adc_foreach(adcDefaultConfig);
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}
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static void timerDefaultConfig(timer_dev*);
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static void setupTimers() {
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timer_foreach(timerDefaultConfig);
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}
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static void adcDefaultConfig(const adc_dev *dev) {
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adc_init(dev);
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adc_set_extsel(dev, ADC_SWSTART);
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adc_set_exttrig(dev, true);
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adc_enable(dev);
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adc_calibrate(dev);
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adc_set_sample_rate(dev, ADC_SMPR_55_5);
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}
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static void timerDefaultConfig(timer_dev *dev) {
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timer_adv_reg_map *regs = (dev->regs).adv;
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const uint16 full_overflow = 0xFFFF;
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const uint16 half_duty = 0x8FFF;
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timer_init(dev);
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timer_pause(dev);
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regs->CR1 = TIMER_CR1_ARPE;
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regs->PSC = 1;
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regs->SR = 0;
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regs->DIER = 0;
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switch (dev->type) {
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case TIMER_ADVANCED:
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regs->BDTR = TIMER_BDTR_MOE | TIMER_BDTR_LOCK_OFF;
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// fall-through
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case TIMER_GENERAL:
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timer_set_reload(dev, full_overflow);
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for (int channel = 1; channel <= 4; channel++) {
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timer_set_compare(dev, channel, half_duty);
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timer_oc_set_mode(dev, channel, TIMER_OC_MODE_PWM_1, TIMER_OC_PE);
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}
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// fall-through
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case TIMER_BASIC:
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break;
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}
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2016-06-07 18:34:36 -07:00
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regs->EGR = TIMER_EGR_UG;
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2014-12-28 06:29:08 -08:00
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timer_resume(dev);
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}
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