68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
|
#include "flipper_v2.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();
|
||
|
|
}
|