226 lines
7.0 KiB
C++
Executable File
226 lines
7.0 KiB
C++
Executable File
/******************************************************************************
|
|
* The MIT License
|
|
*
|
|
* Copyright (c) 2010 Perry Hung.
|
|
* Copyright (c) 2011, 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/boards.cpp
|
|
* @brief init() and board routines.
|
|
*
|
|
* This file is mostly interesting for the init() function, which
|
|
* configures Flash, the core clocks, and a variety of other available
|
|
* peripherals on the board so the rest of Wirish doesn't have to turn
|
|
* things on before using them.
|
|
*
|
|
* Prior to returning, init() calls boardInit(), which allows boards
|
|
* to perform any initialization they need to. This file includes a
|
|
* weak no-op definition of boardInit(), so boards that don't need any
|
|
* special initialization don't have to define their own.
|
|
*
|
|
* How init() works is chip-specific. See the boards_setup.cpp files
|
|
* under e.g. wirish/stm32f1/, wirish/stmf32f2 for the details, but be
|
|
* advised: their contents are unstable, and can/will change without
|
|
* notice.
|
|
*/
|
|
|
|
#include <boards.h>
|
|
#include <libmaple/libmaple_types.h>
|
|
#include <libmaple/flash.h>
|
|
#include <libmaple/nvic.h>
|
|
#include <libmaple/systick.h>
|
|
#include "boards_private.h"
|
|
|
|
static void setup_flash(void);
|
|
static void setup_clocks(void);
|
|
static void setup_nvic(void);
|
|
static void setup_adcs(void);
|
|
static void setup_timers(void);
|
|
|
|
/*
|
|
* Exported functions
|
|
*/
|
|
|
|
void init(void) {
|
|
setup_flash();
|
|
setup_clocks();
|
|
setup_nvic();
|
|
systick_init(SYSTICK_RELOAD_VAL);
|
|
wirish::priv::board_setup_gpio();
|
|
setup_adcs();
|
|
setup_timers();
|
|
wirish::priv::board_setup_usb();
|
|
wirish::priv::series_init();
|
|
boardInit();
|
|
}
|
|
|
|
/* Provide a default no-op boardInit(). */
|
|
__weak void boardInit(void) {
|
|
}
|
|
|
|
/* You could farm this out to the files in boards/ if e.g. it takes
|
|
* too long to test on boards with lots of pins. */
|
|
bool boardUsesPin(uint8 pin) {
|
|
for (int i = 0; i < BOARD_NR_USED_PINS; i++) {
|
|
if (pin == boardUsedPins[i]) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Auxiliary routines
|
|
*/
|
|
|
|
static void setup_flash(void) {
|
|
// Turn on as many Flash "go faster" features as
|
|
// possible. flash_enable_features() just ignores any flags it
|
|
// can't support.
|
|
flash_enable_features(FLASH_PREFETCH | FLASH_ICACHE | FLASH_DCACHE);
|
|
// Configure the wait states, assuming we're operating at "close
|
|
// enough" to 3.3V.
|
|
flash_set_latency(FLASH_SAFE_WAIT_STATES);
|
|
}
|
|
|
|
static void setup_clocks(void) {
|
|
// Turn on HSI. We'll switch to and run off of this while we're
|
|
// setting up the main PLL.
|
|
rcc_turn_on_clk(RCC_CLK_HSI);
|
|
|
|
// Turn off and reset the clock subsystems we'll be using, as well
|
|
// as the clock security subsystem (CSS). Note that resetting CFGR
|
|
// to its default value of 0 implies a switch to HSI for SYSCLK.
|
|
RCC_BASE->CFGR = 0x00000000;
|
|
rcc_disable_css();
|
|
rcc_turn_off_clk(RCC_CLK_PLL);
|
|
rcc_turn_off_clk(RCC_CLK_HSE);
|
|
wirish::priv::board_reset_pll();
|
|
// Clear clock readiness interrupt flags and turn off clock
|
|
// readiness interrupts.
|
|
RCC_BASE->CIR = 0x00000000;
|
|
#if !USE_HSI_CLOCK
|
|
// Enable HSE, and wait until it's ready.
|
|
rcc_turn_on_clk(RCC_CLK_HSE);
|
|
while(!rcc_is_clk_ready(RCC_CLK_HSE))
|
|
;
|
|
#endif
|
|
// Configure AHBx, APBx, etc. prescalers and the main PLL.
|
|
wirish::priv::board_setup_clock_prescalers();
|
|
rcc_configure_pll(&wirish::priv::w_board_pll_cfg);
|
|
|
|
// Enable the PLL, and wait until it's ready.
|
|
rcc_turn_on_clk(RCC_CLK_PLL);
|
|
while(!rcc_is_clk_ready(RCC_CLK_PLL))
|
|
;
|
|
|
|
// Finally, switch to the now-ready PLL as the main clock source.
|
|
rcc_switch_sysclk(RCC_CLKSRC_PLL);
|
|
}
|
|
|
|
/*
|
|
* These addresses are where usercode starts when a bootloader is
|
|
* present. If no bootloader is present, the user NVIC usually starts
|
|
* at the Flash base address, 0x08000000.
|
|
*/
|
|
#if defined(BOOTLOADER_maple)
|
|
#define USER_ADDR_ROM 0x08005000
|
|
#else
|
|
#define USER_ADDR_ROM 0x08000000
|
|
#endif
|
|
#define USER_ADDR_RAM 0x20000C00
|
|
extern char __text_start__;
|
|
|
|
static void setup_nvic(void) {
|
|
|
|
nvic_init((uint32)VECT_TAB_ADDR, 0);
|
|
|
|
/* Roger Clark. We now control nvic vector table in boards.txt using the build.vect paramater
|
|
#ifdef VECT_TAB_FLASH
|
|
nvic_init(USER_ADDR_ROM, 0);
|
|
#elif defined VECT_TAB_RAM
|
|
nvic_init(USER_ADDR_RAM, 0);
|
|
#elif defined VECT_TAB_BASE
|
|
nvic_init((uint32)0x08000000, 0);
|
|
#elif defined VECT_TAB_ADDR
|
|
// A numerically supplied value
|
|
nvic_init((uint32)VECT_TAB_ADDR, 0);
|
|
#else
|
|
// Use the __text_start__ value from the linker script; this
|
|
// should be the start of the vector table.
|
|
nvic_init((uint32)&__text_start__, 0);
|
|
#endif
|
|
|
|
*/
|
|
}
|
|
|
|
static void adc_default_config(adc_dev *dev) {
|
|
adc_enable_single_swstart(dev);
|
|
adc_set_sample_rate(dev, wirish::priv::w_adc_smp);
|
|
}
|
|
|
|
static void setup_adcs(void) {
|
|
adc_set_prescaler(wirish::priv::w_adc_pre);
|
|
adc_foreach(adc_default_config);
|
|
}
|
|
|
|
static void timer_default_config(timer_dev *dev) {
|
|
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 (uint8 channel = 1; channel <= 4; channel++) {
|
|
if (timer_has_cc_channel(dev, 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_generate_update(dev);
|
|
timer_resume(dev);
|
|
}
|
|
|
|
static void setup_timers(void) {
|
|
timer_foreach(timer_default_config);
|
|
}
|