flipperzero-firmware/applications/lf-rfid/em4100.c
DrZlo13 8f9b2513ff
[FL-140] Core api dynamic records (#296)
* SYSTEM: tickless mode with deep sleep.
* Move FreeRTOS ticks to lptim2
* API: move all sumbodules init routines to one place. Timebase: working lptim2 at tick source.
* API Timebase: lp-timer routines, timer access safe zones prediction and synchronization. FreeRTOS: adjust configuration for tickless mode.
* NFC: support for tickless mode.
* API Timebase: improve tick error handling in IRQ. Apploader: use insomnia mode to run applications.
* BLE: prevent sleep while core2 starting
* HAL: nap while in insomnia mode
* init records work
* try to implement record delete
* tests and flapp
* flapp subsystem
* new core functions to get app stat, simplify core code
* fix thread termination
* add strdup to core
* fix tests
* Refactoring: remove all unusued parts, update API usage, aggreagate API sources and headers, new record storage
* Refactoring: update furi record api usage, cleanup code
* Fix broken merge for freertos apps
* Core, Target: fix compilation warnings
* Drop firmware target local
* HAL Timebase, Power, Clock: semaphore guarded access to clock and power modes, better sleep mode.
* SD-Filesystem: wait for all deps to arrive before adding widget. Core, BLE: disable debug dump to serial.
* delete old app example-ipc
* delete old app fatfs list
* fix strobe app, add input header
* delete old display driver
* comment old app qr-code
* fix sd-card test, add forced widget update
* remove unused new core test
* increase heap to 128k
* comment and assert old core tests
* fix syntax

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
2021-01-20 19:09:26 +03:00

71 lines
1.8 KiB
C

#include <furi.h>
void prepare_data(uint32_t ID, uint32_t VENDOR, uint8_t* data) {
uint8_t value[10];
// vendor rows (4 bit in a row)
value[0] = (VENDOR >> 4) & 0xF;
value[1] = VENDOR & 0xF;
const uint8_t ROW_SIZE = 4;
const uint8_t HEADER_SIZE = 9;
// ID rows (4 bit in a row)
for(int i = 0; i < 8; i++) {
value[i + 2] = (ID >> (28 - i * ROW_SIZE)) & 0xF;
}
for(uint8_t i = 0; i < HEADER_SIZE; i++) {
data[i] = 1; // header
}
for(uint8_t i = 0; i < 10; i++) { // data
for(uint8_t j = 0; j < ROW_SIZE; j++) {
data[HEADER_SIZE + i * (ROW_SIZE + 1) + j] = (value[i] >> ((ROW_SIZE - 1) - j)) & 1;
}
// row parity
data[HEADER_SIZE + i * (ROW_SIZE + 1) + ROW_SIZE] =
(data[HEADER_SIZE + i * (ROW_SIZE + 1) + 0] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 1] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 2] +
data[HEADER_SIZE + i * (ROW_SIZE + 1) + 3]) %
2;
}
for(uint8_t i = 0; i < ROW_SIZE; i++) { //checksum
uint8_t checksum = 0;
for(uint8_t j = 0; j < 10; j++) {
checksum += data[HEADER_SIZE + i + j * (ROW_SIZE + 1)];
}
data[i + 59] = checksum % 2;
}
data[63] = 0; // stop bit
/*
printf("em data: ");
for(uint8_t i = 0; i < 64; i++) {
printf("%d ", data[i]);
}
printf("\n");
*/
}
void em4100_emulation(uint8_t* data, GpioPin* pin) {
taskENTER_CRITICAL();
gpio_write(pin, true);
for(uint8_t i = 0; i < 8; i++) {
for(uint8_t j = 0; j < 64; j++) {
delay_us(270);
gpio_write(pin, data[j]);
delay_us(270);
gpio_write(pin, !data[j]);
}
}
gpio_write(pin, false);
taskEXIT_CRITICAL();
}