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[FL-3168] Add one_wire lib to f18, separate ibutton (#2509)

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* Separate ibutton to its own module, add one_wire to f18
* Move onewire cli to a separate app

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
This commit is contained in:
Georgii Surkov
2023-03-20 19:23:17 +03:00
committed by GitHub
parent 1d91a572cc
commit 0917494a80
55 changed files with 156 additions and 72 deletions
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261
lib/ibutton/protocols/dallas/dallas_common.c Normal file
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#include "dallas_common.h"
#include <core/common_defines.h>
#include <one_wire/maxim_crc.h>
#define BITS_IN_BYTE 8U
#define DALLAS_COMMON_ROM_DATA_KEY_V1 "Data"
#define DALLAS_COMMON_ROM_DATA_KEY_V2 "Rom Data"
#define DALLAS_COMMON_COPY_SCRATCH_MIN_TIMEOUT_US 5U
#define DALLAS_COMMON_COPY_SCRATCH_POLL_COUNT 20U
#define DALLAS_COMMON_END_ADDRESS_MASK 0x01F
#define DALLAS_COMMON_STATUS_FLAG_PF (1U << 5)
#define DALLAS_COMMON_STATUS_FLAG_OF (1U << 6)
#define DALLAS_COMMON_STATUS_FLAG_AA (1U << 7)
#define DALLAS_COMMON_BRIEF_HEAD_COUNT 4U
#define DALLAS_COMMON_BRIEF_TAIL_COUNT 3U
#define BITS_IN_BYTE 8U
#define BITS_IN_KBIT 1024U
#define BITS_IN_MBIT (BITS_IN_KBIT * 1024U)
bool dallas_common_skip_rom(OneWireHost* host) {
onewire_host_write(host, DALLAS_COMMON_CMD_SKIP_ROM);
return true;
}
bool dallas_common_read_rom(OneWireHost* host, DallasCommonRomData* rom_data) {
onewire_host_write(host, DALLAS_COMMON_CMD_READ_ROM);
onewire_host_read_bytes(host, rom_data->bytes, sizeof(DallasCommonRomData));
return dallas_common_is_valid_crc(rom_data);
}
bool dallas_common_write_scratchpad(
OneWireHost* host,
uint16_t address,
const uint8_t* data,
size_t data_size) {
onewire_host_write(host, DALLAS_COMMON_CMD_WRITE_SCRATCH);
onewire_host_write(host, (uint8_t)address);
onewire_host_write(host, (uint8_t)(address >> BITS_IN_BYTE));
onewire_host_write_bytes(host, data, data_size);
return true;
}
bool dallas_common_read_scratchpad(
OneWireHost* host,
DallasCommonAddressRegs* regs,
uint8_t* data,
size_t data_size) {
onewire_host_write(host, DALLAS_COMMON_CMD_READ_SCRATCH);
onewire_host_read_bytes(host, regs->bytes, sizeof(DallasCommonAddressRegs));
onewire_host_read_bytes(host, data, data_size);
return true;
}
bool dallas_common_copy_scratchpad(
OneWireHost* host,
const DallasCommonAddressRegs* regs,
uint32_t timeout_us) {
onewire_host_write(host, DALLAS_COMMON_CMD_COPY_SCRATCH);
onewire_host_write_bytes(host, regs->bytes, sizeof(DallasCommonAddressRegs));
const uint32_t poll_delay =
MAX(timeout_us / DALLAS_COMMON_COPY_SCRATCH_POLL_COUNT,
DALLAS_COMMON_COPY_SCRATCH_MIN_TIMEOUT_US);
uint32_t time_elapsed;
for(time_elapsed = 0; time_elapsed < timeout_us; time_elapsed += poll_delay) {
if(!onewire_host_read_bit(host)) break;
furi_delay_us(poll_delay);
}
return time_elapsed < timeout_us;
}
bool dallas_common_read_mem(OneWireHost* host, uint16_t address, uint8_t* data, size_t data_size) {
onewire_host_write(host, DALLAS_COMMON_CMD_READ_MEM);
onewire_host_write(host, (uint8_t)address);
onewire_host_write(host, (uint8_t)(address >> BITS_IN_BYTE));
onewire_host_read_bytes(host, data, (uint16_t)data_size);
return true;
}
bool dallas_common_write_mem(
OneWireHost* host,
uint32_t timeout_us,
size_t page_size,
const uint8_t* data,
size_t data_size) {
// Data size must be a multiple of page size
furi_check(data_size % page_size == 0);
DallasCommonAddressRegs regs;
uint8_t* scratch = malloc(page_size);
size_t i;
for(i = 0; i < data_size; i += page_size) {
const uint8_t* data_ptr = data + i;
// Write scratchpad with the next page value
if(!onewire_host_reset(host)) break;
if(!dallas_common_skip_rom(host)) break;
if(!dallas_common_write_scratchpad(host, i, data_ptr, page_size)) break;
// Read back the scratchpad contents and address registers
if(!onewire_host_reset(host)) break;
if(!dallas_common_skip_rom(host)) break;
if(!dallas_common_read_scratchpad(host, &regs, scratch, page_size)) break;
// Verify scratchpad contents
if(memcmp(data_ptr, scratch, page_size) != 0) break;
// Write scratchpad to internal memory
if(!onewire_host_reset(host)) break;
if(!dallas_common_skip_rom(host)) break;
if(!dallas_common_copy_scratchpad(host, &regs, timeout_us)) break;
// Read back the address registers again
if(!onewire_host_reset(host)) break;
if(!dallas_common_skip_rom(host)) break;
if(!dallas_common_read_scratchpad(host, &regs, scratch, 0)) break;
// Check if AA flag is set
if(!(regs.fields.status & DALLAS_COMMON_STATUS_FLAG_AA)) break;
}
free(scratch);
return i == data_size;
}
bool dallas_common_emulate_search_rom(OneWireSlave* bus, const DallasCommonRomData* rom_data) {
for(size_t i = 0; i < sizeof(DallasCommonRomData); i++) {
for(size_t j = 0; j < BITS_IN_BYTE; j++) {
bool bit = (rom_data->bytes[i] >> j) & 0x01;
if(!onewire_slave_send_bit(bus, bit)) return false;
if(!onewire_slave_send_bit(bus, !bit)) return false;
onewire_slave_receive_bit(bus);
// TODO: check for errors and return if any
}
}
return true;
}
bool dallas_common_emulate_read_rom(OneWireSlave* bus, const DallasCommonRomData* rom_data) {
return onewire_slave_send(bus, rom_data->bytes, sizeof(DallasCommonRomData));
}
bool dallas_common_emulate_read_mem(OneWireSlave* bus, const uint8_t* data, size_t data_size) {
bool success = false;
union {
uint8_t bytes[sizeof(uint16_t)];
uint16_t word;
} address;
do {
if(!onewire_slave_receive(bus, address.bytes, sizeof(address))) break;
if(address.word >= data_size) break;
if(!onewire_slave_send(bus, data + address.word, data_size - address.word)) break;
success = true;
} while(false);
return success;
}
bool dallas_common_save_rom_data(FlipperFormat* ff, const DallasCommonRomData* rom_data) {
return flipper_format_write_hex(
ff, DALLAS_COMMON_ROM_DATA_KEY_V2, rom_data->bytes, sizeof(DallasCommonRomData));
}
bool dallas_common_load_rom_data(
FlipperFormat* ff,
uint32_t format_version,
DallasCommonRomData* rom_data) {
switch(format_version) {
case 1:
return flipper_format_read_hex(
ff, DALLAS_COMMON_ROM_DATA_KEY_V1, rom_data->bytes, sizeof(DallasCommonRomData));
case 2:
return flipper_format_read_hex(
ff, DALLAS_COMMON_ROM_DATA_KEY_V2, rom_data->bytes, sizeof(DallasCommonRomData));
default:
return false;
}
}
bool dallas_common_is_valid_crc(const DallasCommonRomData* rom_data) {
const uint8_t crc_calculated =
maxim_crc8(rom_data->bytes, sizeof(DallasCommonRomData) - 1, MAXIM_CRC8_INIT);
const uint8_t crc_received = rom_data->fields.checksum;
return crc_calculated == crc_received;
}
void dallas_common_render_brief_data(
FuriString* result,
const DallasCommonRomData* rom_data,
const uint8_t* mem_data,
size_t mem_size,
const char* mem_name) {
for(size_t i = 0; i < sizeof(rom_data->bytes); ++i) {
furi_string_cat_printf(result, "%02X ", rom_data->bytes[i]);
}
const char* size_prefix = "";
size_t mem_size_bits = mem_size * BITS_IN_BYTE;
if(mem_size_bits >= BITS_IN_MBIT) {
size_prefix = "M";
mem_size_bits /= BITS_IN_MBIT;
} else if(mem_size_bits >= BITS_IN_KBIT) {
size_prefix = "K";
mem_size_bits /= BITS_IN_KBIT;
}
furi_string_cat_printf(
result, "\nInternal %s: %zu %sbit\n", mem_name, mem_size_bits, size_prefix);
for(size_t i = 0; i < DALLAS_COMMON_BRIEF_HEAD_COUNT; ++i) {
furi_string_cat_printf(result, "%02X ", mem_data[i]);
}
furi_string_cat_printf(result, "[ . . . ]");
for(size_t i = mem_size - DALLAS_COMMON_BRIEF_TAIL_COUNT; i < mem_size; ++i) {
furi_string_cat_printf(result, " %02X", mem_data[i]);
}
}
void dallas_common_render_crc_error(FuriString* result, const DallasCommonRomData* rom_data) {
furi_string_set(result, "CRC Error\n");
const size_t data_size = sizeof(DallasCommonRomData);
for(size_t i = 0; i < data_size; ++i) {
furi_string_cat_printf(result, (i < data_size - 1) ? "%02X " : "%02X", rom_data->bytes[i]);
}
}
void dallas_common_apply_edits(DallasCommonRomData* rom_data, uint8_t family_code) {
rom_data->fields.family_code = family_code;
const uint8_t crc =
maxim_crc8(rom_data->bytes, sizeof(DallasCommonRomData) - 1, MAXIM_CRC8_INIT);
rom_data->fields.checksum = crc;
}