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FL-549 Reading iButton "Cyfral" by HW comparator (#273)

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* new comparator-based reader
* working comparator reader
* add keys "integrity" check
* reset events queue
This commit is contained in:
DrZlo13
2020-12-23 00:44:38 +10:00
committed by GitHub
parent 8b6e7fd4ae
commit b32c5f3897
2 changed files with 322 additions and 7 deletions
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46
applications/ibutton/ibutton_mode_cyfral_read.h
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@@ -1,12 +1,12 @@
#pragma once
#include "ibutton.h"
#include "cyfral_reader.h"
#include "cyfral_reader_comp.h"
class AppiButtonModeCyfralRead : public AppTemplateMode<AppiButtonState, AppiButtonEvent> {
public:
const char* name = "cyfral read";
AppiButton* app;
CyfralReader* reader;
CyfralReaderComp* reader;
void event(AppiButtonEvent* event, AppiButtonState* state);
void render(Canvas* canvas, AppiButtonState* state);
@@ -15,16 +15,48 @@ public:
AppiButtonModeCyfralRead(AppiButton* parent_app) {
app = parent_app;
reader = new CyfralReader(ADC1, ADC_CHANNEL_14);
// TODO open record
const GpioPin* one_wire_pin_record = &ibutton_gpio;
reader = new CyfralReaderComp(one_wire_pin_record);
};
static const uint8_t key_length = 4;
static const uint8_t num_keys_to_check = 4;
uint8_t key_index = 0;
uint8_t keys[num_keys_to_check][4];
};
void AppiButtonModeCyfralRead::event(AppiButtonEvent* event, AppiButtonState* state) {
if(event->type == AppiButtonEvent::EventTypeTick) {
uint8_t data[8];
if(reader->read(data, 4)) {
memcpy(app->state.cyfral_address[app->state.cyfral_address_index], data, 4);
app->blink_green();
// if we read a key
if(reader->read(keys[key_index], key_length)) {
// read next key
key_index++;
// if we read sufficient amount of keys
if(key_index >= num_keys_to_check) {
bool result = true;
key_index = 0;
// compare all keys
for(uint8_t i = 1; i < num_keys_to_check; i++) {
if(memcmp(keys[i], keys[i - 1], key_length) != 0) {
result = false;
break;
}
}
// if all keys is same
if(result) {
// copy key to mem and blink
memcpy(
app->state.cyfral_address[app->state.cyfral_address_index],
keys[key_index],
key_length);
app->blink_green();
}
}
}
} else if(event->type == AppiButtonEvent::EventTypeKey) {
if(event->value.input.state && event->value.input.input == InputUp) {