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Support for custom CC1101 presets.
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antirez committed Jan 4, 2023
1 parent d373b5d commit 1d8ca65
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Showing 3 changed files with 64 additions and 8 deletions.
1 change: 1 addition & 0 deletions app.h
Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@ typedef enum {
typedef struct {
const char *name;
FuriHalSubGhzPreset preset;
uint8_t *custom;
} ProtoViewModulation;

extern ProtoViewModulation ProtoViewModulations[]; /* In app_subghz.c */
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25 changes: 17 additions & 8 deletions app_subghz.c
Original file line number Diff line number Diff line change
Expand Up @@ -2,17 +2,19 @@
* See the LICENSE file for information about the license. */

#include "app.h"
#include "custom_presets.h"

#include <flipper_format/flipper_format_i.h>

ProtoViewModulation ProtoViewModulations[] = {
{"OOK 650Khz", FuriHalSubGhzPresetOok650Async},
{"OOK 270Khz", FuriHalSubGhzPresetOok270Async},
{"2FSK 2.38Khz", FuriHalSubGhzPreset2FSKDev238Async},
{"2FSK 47.6Khz", FuriHalSubGhzPreset2FSKDev476Async},
{"MSK", FuriHalSubGhzPresetMSK99_97KbAsync},
{"GFSK", FuriHalSubGhzPresetGFSK9_99KbAsync},
{NULL, 0} /* End of list sentinel. */
{"OOK 650Khz", FuriHalSubGhzPresetOok650Async, NULL},
{"OOK 270Khz", FuriHalSubGhzPresetOok270Async, NULL},
{"2FSK 2.38Khz", FuriHalSubGhzPreset2FSKDev238Async, NULL},
{"2FSK 47.6Khz", FuriHalSubGhzPreset2FSKDev476Async, NULL},
{"MSK", FuriHalSubGhzPresetMSK99_97KbAsync, NULL},
{"GFSK", FuriHalSubGhzPresetGFSK9_99KbAsync, NULL},
{"FSK for TPMS", 0, (uint8_t*)protoview_subghz_tpms_async_regs},
{NULL, 0, NULL} /* End of list sentinel. */
};

/* Called after the application initialization in order to setup the
Expand All @@ -23,7 +25,14 @@ void radio_begin(ProtoViewApp* app) {
furi_assert(app);
furi_hal_subghz_reset();
furi_hal_subghz_idle();
furi_hal_subghz_load_preset(ProtoViewModulations[app->modulation].preset);

/* The CC1101 preset can be either one of the standard presets, if
* the modulation "custom" field is NULL, or a custom preset we
* defined in custom_presets.h. */
if (ProtoViewModulations[app->modulation].custom == NULL)
furi_hal_subghz_load_preset(ProtoViewModulations[app->modulation].preset);
else
furi_hal_subghz_load_custom_preset(ProtoViewModulations[app->modulation].custom);
furi_hal_gpio_init(&gpio_cc1101_g0, GpioModeInput, GpioPullNo, GpioSpeedLow);
app->txrx->txrx_state = TxRxStateIDLE;
}
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46 changes: 46 additions & 0 deletions custom_presets.h
Original file line number Diff line number Diff line change
@@ -0,0 +1,46 @@
#include <cc1101.h>

static uint8_t protoview_subghz_tpms_async_regs[][2] = {
/* GPIO GD0 */
{CC1101_IOCFG0, 0x0D}, // GD0 as async serial data output/input

/* Frequency Synthesizer Control */
{CC1101_FSCTRL1, 0x06}, // IF = (26*10^6) / (2^10) * 0x06 = 152343.75Hz

/* Packet engine */
{CC1101_PKTCTRL0, 0x32}, // Async, continious, no whitening
{CC1101_PKTCTRL1, 0x04},

// // Modem Configuration
{CC1101_MDMCFG0, 0x00},
{CC1101_MDMCFG1, 0x02},
{CC1101_MDMCFG2, 0x04}, // Format 2-FSK/FM, No preamble/sync, Disable (current optimized)
{CC1101_MDMCFG3, 0x93}, // Data rate is 20kBaud
{CC1101_MDMCFG4, 0x59}, // Rx bandwidth filter is 325 kHz
{CC1101_DEVIATN, 0x41}, // Deviation 28.56 kHz

/* Main Radio Control State Machine */
{CC1101_MCSM0, 0x18}, // Autocalibrate on idle-to-rx/tx, PO_TIMEOUT is 64 cycles(149-155us)

/* Frequency Offset Compensation Configuration */
{CC1101_FOCCFG,
0x16}, // no frequency offset compensation, POST_K same as PRE_K, PRE_K is 4K, GATE is off

/* Automatic Gain Control */
{CC1101_AGCCTRL0,
0x91}, //10 - Medium hysteresis, medium asymmetric dead zone, medium gain ; 01 - 16 samples agc; 00 - Normal AGC, 01 - 8dB boundary
{CC1101_AGCCTRL1,
0x00}, // 0; 0 - LNA 2 gain is decreased to minimum before decreasing LNA gain; 00 - Relative carrier sense threshold disabled; 0000 - RSSI to MAIN_TARGET
{CC1101_AGCCTRL2, 0x07}, // 00 - DVGA all; 000 - MAX LNA+LNA2; 111 - MAIN_TARGET 42 dB

/* Wake on radio and timeouts control */
{CC1101_WORCTRL, 0xFB}, // WOR_RES is 2^15 periods (0.91 - 0.94 s) 16.5 - 17.2 hours

/* Frontend configuration */
{CC1101_FREND0, 0x10}, // Adjusts current TX LO buffer
{CC1101_FREND1, 0x56},

/* End */
{0, 0},
};

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