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feat: add RTL-SDR, R820t drivers, radio APIs, and sdr demo tool

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This commit is contained in:
Daniel Hammer
2026-06-22 11:49:16 +02:00
parent c8d8ed6ebe
commit 5363ca5265
20 changed files with 2213 additions and 12 deletions
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template/sysroot/include/Api/Syscall.hpp
+41
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@@ -182,6 +182,29 @@ namespace montauk::abi {
// Paginated directory read (path, names, max, startIndex)
static constexpr uint64_t SYS_READDIR_AT = 136;
/* Sdr.hpp -- software-defined radio receive API */
static constexpr uint64_t SYS_SDR_COUNT = 140; // number of receivers
static constexpr uint64_t SYS_SDR_INFO = 141; // (index, SdrDeviceInfo*)
static constexpr uint64_t SYS_SDR_OPEN = 142; // (index) -> handle
static constexpr uint64_t SYS_SDR_CLOSE = 143; // (handle)
static constexpr uint64_t SYS_SDR_START = 144; // (handle) begin streaming
static constexpr uint64_t SYS_SDR_STOP = 145; // (handle) stop streaming
static constexpr uint64_t SYS_SDR_READ = 146; // (handle, buf, len) -> bytes
static constexpr uint64_t SYS_SDR_SETPARAM = 147; // (handle, param, value)
static constexpr uint64_t SYS_SDR_GETPARAM = 148; // (handle, param) -> value
// Tunable parameters (for SYS_SDR_SETPARAM / SYS_SDR_GETPARAM).
static constexpr int SDR_PARAM_FREQ = 0; // center frequency, Hz
static constexpr int SDR_PARAM_SAMPLE_RATE = 1; // sample rate, Hz
static constexpr int SDR_PARAM_GAIN_MODE = 2; // 0 = auto/AGC, 1 = manual
static constexpr int SDR_PARAM_GAIN = 3; // tuner gain, tenths of dB
static constexpr int SDR_PARAM_FREQ_CORR = 4; // frequency correction, ppm
static constexpr int SDR_PARAM_AGC = 5; // demod digital AGC, 0/1
static constexpr int SDR_PARAM_DIRECT_SAMP = 6; // direct sampling: 0=off,1=I,2=Q
// Sample formats reported in SdrDeviceInfo.sampleFormat.
static constexpr uint8_t SDR_FORMAT_CU8 = 0; // 8-bit unsigned interleaved I/Q
// Graceful power-off request actions (SYS_POWER_REQUEST). The desktop posts
// a pending action and exits; login.elf reads it, runs the shutdown stages,
// then issues the matching SYS_SHUTDOWN / SYS_RESET.
@@ -433,6 +456,24 @@ namespace montauk::abi {
char name[64];
};
// Software-defined radio receiver description (returned by SYS_SDR_INFO).
struct SdrDeviceInfo {
char name[64]; // e.g. "Realtek RTL2832U"
char tuner[32]; // e.g. "Rafael Micro R820T2"
char serial[32]; // device serial / bus location
uint64_t freqMin; // minimum tunable center frequency, Hz
uint64_t freqMax; // maximum tunable center frequency, Hz
uint32_t sampleRateMin; // minimum sample rate, Hz
uint32_t sampleRateMax; // maximum sample rate, Hz
uint32_t numGains; // number of discrete tuner gain steps
int32_t gains[32]; // available gains, tenths of dB
uint8_t sampleFormat; // SDR_FORMAT_*
uint8_t present; // 1 if the underlying hardware is connected
uint8_t streaming; // 1 if currently delivering samples
uint8_t _pad;
uint32_t _pad2;
};
struct ThermalInfo {
char name[32]; // short zone name (e.g. "THRM", "TZ00")
int32_t temperature; // tenths of degrees Celsius, or -1 if unavailable