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/******************************************************************************
* The MIT License
*
* Copyright (c) 2012 LeafLabs, LLC.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file wirish/stm32f1/boards_setup.cpp
* @author Marti Bolivar <mbolivar@leaflabs.com>
* @brief STM32F1 chip setup.
*
* This file controls how init() behaves on the STM32F1. Be very
* careful when changing anything here. Many of these values depend
* upon each other.
*/
#include "boards_private.h"
#include <libmaple/gpio.h>
#include <libmaple/timer.h>
#include <libmaple/usb_cdcacm.h>
#include <board/board.h>
// Allow boards to provide a PLL multiplier. This is useful for
// e.g. STM32F100 value line MCUs, which use slower multipliers.
// (We're leaving the default to RCC_PLLMUL_9 for now, since that
// works for F103 performance line MCUs, which is all that LeafLabs
// currently officially supports).
#ifndef BOARD_RCC_PLLMUL
#define BOARD_RCC_PLLMUL RCC_PLLMUL_9
#endif
/* FIXME: Reintroduce all "#if 0"'ed blocks once libmaple provides
* these definitions again. */
namespace wirish {
namespace priv {
static stm32f1_rcc_pll_data pll_data = {BOARD_RCC_PLLMUL};
rcc_pll_cfg w_board_pll_cfg = {RCC_PLLSRC_HSE, &pll_data};
adc_prescaler w_adc_pre = ADC_PRE_PCLK2_DIV_6;
adc_smp_rate w_adc_smp = ADC_SMPR_55_5;
static void config_timer(timer_dev*);
void board_reset_pll(void) {
// TODO
}
void board_setup_clock_prescalers(void) {
rcc_set_prescaler(RCC_PRESCALER_AHB, RCC_AHB_SYSCLK_DIV_1);
rcc_set_prescaler(RCC_PRESCALER_APB1, RCC_APB1_HCLK_DIV_2);
rcc_set_prescaler(RCC_PRESCALER_APB2, RCC_APB2_HCLK_DIV_1);
}
void board_setup_gpio(void) {
gpio_init_all();
// Initialize AFIO here, too, so peripheral remaps and external
// interrupts work out of the box.
afio_init();
}
void board_setup_timers(void) {
timer_foreach(config_timer);
}
void board_setup_usb(void) {
#if 0
# if STM32_HAVE_USB
usb_cdcacm_enable(BOARD_USB_DISC_DEV, BOARD_USB_DISC_BIT);
# endif
#endif
}
/*
* Auxiliary routines
*/
static void config_timer(timer_dev *dev) {
#if 0
timer_adv_reg_map *regs = (dev->regs).adv;
const uint16 full_overflow = 0xFFFF;
const uint16 half_duty = 0x8FFF;
timer_init(dev);
timer_pause(dev);
regs->CR1 = TIMER_CR1_ARPE;
regs->PSC = 1;
regs->SR = 0;
regs->DIER = 0;
regs->EGR = TIMER_EGR_UG;
switch (dev->type) {
case TIMER_ADVANCED:
regs->BDTR = TIMER_BDTR_MOE | TIMER_BDTR_LOCK_OFF;
// fall-through
case TIMER_GENERAL:
timer_set_reload(dev, full_overflow);
for (int channel = 1; channel <= 4; channel++) {
timer_set_compare(dev, channel, half_duty);
timer_oc_set_mode(dev, channel, TIMER_OC_MODE_PWM_1, TIMER_OC_PE);
}
// fall-through
case TIMER_BASIC:
break;
}
timer_resume(dev);
#endif
}
}
}
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