106 lines
4.5 KiB
C
106 lines
4.5 KiB
C
#include "./princeton.h"
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#include "./tag.h"
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#include <lib/subghz/transmitter.h>
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#include <lib/subghz/devices/cc1101_int/cc1101_int_interconnect.h>
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//#include <applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h>
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#include <lib/subghz/protocols/protocol_items.h>
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#include <lib/subghz/devices/devices.h>
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static void
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set_princeton(FlipperFormat* flipper_format, uint32_t key, uint32_t te, uint32_t repeat) {
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uint32_t bits = 24;
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uint8_t data[8] = {0};
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data[5] = (uint8_t)((key >> 16) & 0xFFU);
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data[6] = (uint8_t)((key >> 8) & 0xFFU);
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data[7] = (uint8_t)(key & 0xFFU);
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flipper_format_insert_or_update_string_cstr(flipper_format, "Protocol", "Princeton");
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flipper_format_insert_or_update_uint32(flipper_format, "Bit", &bits, 1);
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flipper_format_insert_or_update_hex(flipper_format, "Key", data, COUNT_OF(data));
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flipper_format_insert_or_update_uint32(flipper_format, "TE", &te, 1);
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flipper_format_insert_or_update_uint32(flipper_format, "Repeat", &repeat, 1);
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flipper_format_rewind(flipper_format);
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}
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void send_princeton(uint32_t key, uint32_t frequency) {
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// 'TE' is the microsecond (us) duration of the smallest pulse (effectively a bit in the BIN_RAW signal).
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// NOTE: If we wanted the Princeton signal to NOT be detected by FZ we could add +300+50, but receiver might still work (values from te_short+te_delta+50 from princeton.c)
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uint32_t te = 390;
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// 'repeat' is the number of times to repeat the signal.
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uint32_t repeat = 5;
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if(!furi_hal_region_is_frequency_allowed(frequency)) {
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// TODO: Show friendly UI message if frequency is not allowed.
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FURI_LOG_E(TAG, "Frequency %lu is not allowed in this region.", frequency);
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return;
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}
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FURI_LOG_I(TAG, "Sending signal on frequency %lu", frequency);
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// Populate the CC101 device list.
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subghz_devices_init();
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// Get the internal radio device.
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const SubGhzDevice* device = subghz_devices_get_by_name(SUBGHZ_DEVICE_CC1101_INT_NAME);
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// Get the Princeton SubGhzTransmitter (for decoding our file format).
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SubGhzEnvironment* environment = subghz_environment_alloc();
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subghz_environment_set_protocol_registry(environment, (void*)&subghz_protocol_registry);
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SubGhzTransmitter* transmitter = subghz_transmitter_alloc_init(environment, "Princeton");
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// Load the payload we want to send into flipper_format.
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FlipperFormat* flipper_format = flipper_format_string_alloc();
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set_princeton(flipper_format, key, te, repeat);
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// Fill out the SubGhzProtocolDecoderPrinceton (which includes SubGhzBlockGeneric data) in our transmitter based on parsing flipper_format.
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// initance->encoder.upload[] gets filled out with duration and level information (You can think of this as the RAW data).
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SubGhzProtocolStatus status = subghz_transmitter_deserialize(transmitter, flipper_format);
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furi_assert(status == SubGhzProtocolStatusOk);
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// Currently unused for internal radio, but good idea to still invoke it.
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subghz_devices_begin(device);
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// Initializes the CC1101 SPI bus
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subghz_devices_reset(device);
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// Use one of the presets in subghz_device_cc1101_int_interconnect_load_preset. If the first argument is FuriHalSubGhzPresetCustom, then the second argument is
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// a custom register table (Reg, value, reg, value, ...,0, 0, PATable [0..7] entries).
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subghz_devices_load_preset(device, FuriHalSubGhzPresetOok650Async, NULL);
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// Set the frequency, RF switch path (band), calibrates the oscillator on the CC1101.
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frequency = subghz_devices_set_frequency(device, frequency);
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// Stop charging the battery while transmitting.
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furi_hal_power_suppress_charge_enter();
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// Start transmitting (keeps the DMA buffer filled with the encoder.upload[] data)
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if(subghz_devices_start_async_tx(device, subghz_transmitter_yield, transmitter)) {
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// Wait for the transmission to complete.
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while(!(subghz_devices_is_async_complete_tx(device))) {
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furi_delay_ms(100);
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}
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// Stop transmitting, debug log (tag="FuriHalSubGhz") the duty cycle information.
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subghz_devices_stop_async_tx(device);
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}
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// clean up and shutdown cc1101
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subghz_devices_sleep(device);
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// also does a shutdown of cc1101
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subghz_devices_end(device);
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// remove the devices from the registry
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subghz_devices_deinit();
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// Allow the battery to charge again.
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furi_hal_power_suppress_charge_exit();
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// Free resources we allocated.
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flipper_format_free(flipper_format);
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subghz_transmitter_free(transmitter);
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subghz_environment_free(environment);
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}
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