57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/**
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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// Obliterate the contents of flash. This is a silly thing to do if you are
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// trying to run this program from flash, so you should really load and run
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// directly from SRAM. You can enable RAM-only builds for all targets by doing:
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//
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// cmake -DPICO_NO_FLASH=1 ..
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//
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// in your build directory. We've also forced no-flash builds for this app in
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// particular by adding:
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//
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// pico_set_binary_type(flash_nuke no_flash)
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//
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// To the CMakeLists.txt app for this file. Just to be sure, we can check the
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// define:
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#if !PICO_NO_FLASH
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#error "This example must be built to run from SRAM!"
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#endif
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#include "pico/stdlib.h"
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#include "hardware/flash.h"
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#include "pico/bootrom.h"
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int main() {
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uint flash_size_bytes;
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#ifndef PICO_FLASH_SIZE_BYTES
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#warning PICO_FLASH_SIZE_BYTES not set, assuming 16M
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flash_size_bytes = 16 * 1024 * 1024;
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#else
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flash_size_bytes = PICO_FLASH_SIZE_BYTES;
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#endif
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flash_range_erase(0, flash_size_bytes);
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// Leave an eyecatcher pattern in the first page of flash so picotool can
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// more easily check the size:
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static const uint8_t eyecatcher[FLASH_PAGE_SIZE] = "NUKE";
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flash_range_program(0, eyecatcher, FLASH_PAGE_SIZE);
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#ifdef PICO_DEFAULT_LED_PIN
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// Flash LED for success
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gpio_init(PICO_DEFAULT_LED_PIN);
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gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
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for (int i = 0; i < 3; ++i) {
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gpio_put(PICO_DEFAULT_LED_PIN, 1);
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sleep_ms(100);
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gpio_put(PICO_DEFAULT_LED_PIN, 0);
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sleep_ms(100);
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}
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#endif
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// Pop back up as an MSD drive
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reset_usb_boot(0, 0);
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}
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