From 938ebee0e08d23d4e7e14dd5842410ee518021ee Mon Sep 17 00:00:00 2001 From: rehius <128579193+rehius@users.noreply.github.com> Date: Thu, 18 May 2023 09:20:54 +0000 Subject: [PATCH] Add files via upload --- CMakeLists.txt | 37 +++++++++++++++ crc.c | 54 +++++++++++++++++++++ firmware.h | 11 +++++ main.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 228 insertions(+) create mode 100644 CMakeLists.txt create mode 100644 crc.c create mode 100644 firmware.h create mode 100644 main.c diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..98b5cdd --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,37 @@ +# Generated Cmake Pico project file + +cmake_minimum_required(VERSION 3.13) + +set(CMAKE_C_STANDARD 11) +set(CMAKE_CXX_STANDARD 17) + +# Pull in Raspberry Pi Pico SDK (must be before project) +include(pico_sdk_import.cmake) + +project(busk C CXX ASM) + +# Initialise the Raspberry Pi Pico SDK +pico_sdk_init() + +pico_define_boot_stage2(slower_boot2 ${PICO_DEFAULT_BOOT_STAGE2_FILE}) +target_compile_definitions(slower_boot2 PRIVATE PICO_FLASH_SPI_CLKDIV=4) + +add_executable(busk main.c crc.c) + +target_compile_definitions(busk PRIVATE PICO_NO_BINARY_INFO) + +pico_set_program_name(busk "busk") +pico_set_program_version(busk "2.7") + +pico_set_binary_type(busk default) + +pico_enable_stdio_uart(busk 0) +pico_enable_stdio_usb(busk 0) + +# Add the standard library to the build +target_link_libraries(busk pico_stdlib) + +pico_set_boot_stage2(busk slower_boot2) + +pico_add_extra_outputs(busk) + diff --git a/crc.c b/crc.c new file mode 100644 index 0000000..185e79f --- /dev/null +++ b/crc.c @@ -0,0 +1,54 @@ +static const unsigned int crc32_table[] = { + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, + 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, + 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, + 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, + 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, + 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, + 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, + 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, + 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, + 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, + 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, + 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, + 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, + 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, + 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, + 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, + 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, + 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d +}; + +unsigned int crc32 (const unsigned char *buf, int len) + { + const unsigned char *p = buf; + unsigned int crc = ~0U; + while (len--) + crc = crc32_table[(crc ^ *p++) & 0xFF] ^ (crc >> 8); + return crc ^ ~0U; + } \ No newline at end of file diff --git a/firmware.h b/firmware.h new file mode 100644 index 0000000..0ba1d4a --- /dev/null +++ b/firmware.h @@ -0,0 +1,11 @@ +#include "stdint.h" + +struct fw_header { + uint32_t size; + uint32_t crc; + uint8_t data[]; +}; + +typedef void nopar(); + +unsigned int crc32 (const unsigned char *buf, int len); \ No newline at end of file diff --git a/main.c b/main.c new file mode 100644 index 0000000..87268e3 --- /dev/null +++ b/main.c @@ -0,0 +1,126 @@ +#include +#include +#include + +#include "hardware/vreg.h" +#include "hardware/clocks.h" +#include "pico/stdlib.h" +#include "hardware/watchdog.h" + +#include "pins.h" + +#include "firmware.h" + +void pins_setup(void) +{ + // avoid mosfet enable no matter what + gpio_pull_down(PIN_GLI_WS); + gpio_pull_down(PIN_GLI_XIAO); + gpio_pull_down(PIN_GLI_PICO); + gpio_pull_down(PIN_GLI_ITSY); + *(uint32_t*)(0x4001c000 + 4 + PIN_RST*4 + 0x2000) = 0x81; +} + +// overclock setup +void oc_setup(void) +{ + vreg_set_voltage(VREG_VOLTAGE_1_30); + set_sys_clock_khz(200000, true); +} + +void zzz() { + *(uint32_t*)(0x4000803C + 0x3000) = 1; // go to 12 MHz + uint32_t * vreg = (uint32_t*)0x40064000; + vreg[1] &= ~1; // disable brownout + *(uint32_t*)0x40060000 = 0x00d1e000; // disable rosc + *(uint32_t*)0x40004018 = 0xFF; // disable SRAMs + vreg[0] = 1; // lowest possible power + *(uint32_t*)0x40024000 = 0x00d1e000; // disable xosc + while(1); +} + +void halt() { + // disable all pins except glitch + for(int pin = 0; pin <= 29; pin += 1) { + uint32_t pad_reg = 0x4001c000 + 4 + pin*4; + // glitch pin pulldown, just in case + if (pin == PIN_GLI_PICO || pin == PIN_GLI_XIAO || pin == PIN_GLI_WS || pin == PIN_GLI_ITSY) + *(uint32_t*)pad_reg = 0x85; //pulldown + else + *(uint32_t*)pad_reg = 0x81; + } + zzz(); +} + +#define fw_slot_0 ((struct fw_header *) (XIP_BASE + 0x10000)) +#define fw_slot_1 ((struct fw_header *) (XIP_BASE + 0x48000)) +#define RAM ((uint8_t *) 0x20000000) + +#define FUSE_OFF 0xF000 + +#define fuses ((const uint8_t *) (XIP_BASE + FUSE_OFF)) + +int count_fuses() +{ + int weight = 0; + uint32_t * buf = (uint32_t*)fuses; + for (int i = 0; i < 64; i++) { + if(buf[i] == 0) + weight += 32; + else { + weight += __builtin_ctz(buf[i]); + break; + } + } + return weight; +} + +void perform_reboot() +{ + watchdog_enable(0, false); + while(1); +} + +void startup_from_slot(int slot) +{ + struct fw_header * fw = slot ? fw_slot_1 : fw_slot_0; + watchdog_enable(100, false); + // set the slot where we have started from + watchdog_hw->scratch[1] = slot; + // check the size + if (fw->size > 0x38000 || fw->size == 0) { + perform_reboot(); + } + // copy data into the RAM + memcpy(RAM, fw->data, fw->size); + uint32_t real_crc = crc32(RAM, fw->size); + if (real_crc != fw->crc) + { + perform_reboot(); + } + // jump to the unpacked firmware + ((nopar*)0x20000001)(); +} + +int main(void) +{ + pins_setup(); + oc_setup(); + int boot_slot = (count_fuses() & 1); + if (!watchdog_enable_caused_reboot() || !watchdog_caused_reboot()) // first boot attempt + { + watchdog_hw->scratch[0] = 0; + startup_from_slot(boot_slot & 1); + } + else if (watchdog_caused_reboot()) // next boot attempt + { + int boot_try = watchdog_hw->scratch[0]; + if (boot_try == 3) // 1 -> update or failed boot, 2->rollback after update, 3- total fail + { + halt(); + } + watchdog_hw->scratch[0] = boot_try + 1; + startup_from_slot((boot_slot ^ boot_try ^ 1) & 1); + } + return 0; +} \ No newline at end of file