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d30ad28f03
Move canboot specific definitions in board/misc.h to new canboot.h header file. This makes it a little easier to identify differences between canboot code and low-level upstream klipper code. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
// Determine if the bootloader or application should start
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//
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// Copyright (C) 2021 Eric Callahan <arksine.code@gmail.com>
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include <string.h> // strlen
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#include "autoconf.h" // CONFIG_*
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#include "board/flash.h" // flash_read_block
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#include "board/gpio.h" // gpio_in_setup
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#include "board/misc.h" // set_bootup_code
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#include "bootentry.h" // bootentry_check
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#include "canboot.h" // udelay
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#include "ctr.h" // DECL_CTR
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// Generated by buildcommands.py
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DECL_CTR("DECL_BUTTON " __stringify(CONFIG_BUTTON_PIN));
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extern int32_t button_gpio, button_high, button_pullup;
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// Check for a bootloader request via double tap of reset button
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static int
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check_button_pressed(void)
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{
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if (!CONFIG_ENABLE_BUTTON)
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return 0;
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struct gpio_in button = gpio_in_setup(button_gpio, button_pullup);
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udelay(10);
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return gpio_in_read(button) == button_high;
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}
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#define DOUBLE_CLICK_MIN_US 10000
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#define DOUBLE_CLICK_MAX_US 500000
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// Check for a bootloader request via double tap of reset button
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static void
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check_double_reset(void)
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{
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if (!CONFIG_ENABLE_DOUBLE_RESET)
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return;
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// Set request signature and delay - this enters the bootloader if
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// the reset button is double clicked
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udelay(DOUBLE_CLICK_MIN_US);
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set_bootup_code(REQUEST_CANBOOT);
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udelay(DOUBLE_CLICK_MAX_US - DOUBLE_CLICK_MIN_US);
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// No reset, clear the bootup code
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set_bootup_code(0);
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}
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// Check if bootloader or application should be started
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int
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bootentry_check(void)
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{
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// Enter the bootloader in the following conditions:
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// - The request signature is set in memory (request from app)
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// - No application code is present
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uint64_t bootup_code = get_bootup_code();
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if (bootup_code == REQUEST_CANBOOT || !application_check_valid()
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|| check_button_pressed()) {
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// Start bootloader main loop
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set_bootup_code(0);
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return 1;
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}
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check_double_reset();
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// jump to app
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return 0;
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}
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