mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
synced 2025-10-10 08:42:32 +02:00
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#include "tm2004.h"
|
|
|
|
#include <core/kernel.h>
|
|
|
|
#define TM2004_CMD_READ_STATUS 0xAA
|
|
#define TM2004_CMD_READ_MEMORY 0xF0
|
|
#define TM2004_CMD_WRITE_ROM 0x3C
|
|
#define TM2004_CMD_FINALIZATION 0x35
|
|
#define TM2004_ANSWER_READ_MEMORY 0xF5
|
|
|
|
bool tm2004_write(OneWireHost* host, const uint8_t* data, size_t data_size) {
|
|
onewire_host_set_timings_default(host);
|
|
|
|
onewire_host_reset(host);
|
|
onewire_host_write(host, TM2004_CMD_WRITE_ROM);
|
|
// Starting writing from address 0x0000
|
|
onewire_host_write(host, 0x00);
|
|
onewire_host_write(host, 0x00);
|
|
|
|
size_t i;
|
|
for(i = 0; i < data_size; ++i) {
|
|
uint8_t answer;
|
|
|
|
onewire_host_write(host, data[i]);
|
|
answer = onewire_host_read(host);
|
|
// TODO FL-3529: check answer CRC
|
|
|
|
// pulse indicating that data is correct
|
|
furi_delay_us(600);
|
|
onewire_host_write_bit(host, true);
|
|
furi_delay_us(50000);
|
|
|
|
// read written key byte
|
|
answer = onewire_host_read(host); //-V519
|
|
|
|
// check that written and read are same
|
|
if(data[i] != answer) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// TODO FL-3529: Better error handling
|
|
return i == data_size;
|
|
}
|