Waveform loops at 80 or 40 MS/s through the modem DAC engine, ESP32-C5 (esp_sdr_replay.h, CONFIG_ESP_SDR_REPLAY). More...

Data Structures
struct	esp_sdr_replay_cfg

Macros
#define	ESP_SDR_REPLAY_MAX 16383U

Functions
static uint32_t	esp_sdr_replay_word (int32_t i, int32_t q)
uint32_t *	esp_sdr_replay_buf (size_t *words)
	The sample buffer the engine plays from.
int	esp_sdr_replay_start (const struct esp_sdr_replay_cfg *cfg)
	Turn the transmit chain on and start the engine.
int	esp_sdr_replay_wait (uint32_t timeout_us, uint32_t *cycles)
	Wait for a finite replay to finish.
int	esp_sdr_replay_restart (void)
	Start a finished replay again, with the same settings and samples.
uint32_t	esp_sdr_replay_ctrl (void)
bool	esp_sdr_replay_active (void)
void	esp_sdr_replay_stop (void)
	Stop the engine, give the bank back and return to receive.

Detailed Description

Waveform loops at 80 or 40 MS/s through the modem DAC engine, ESP32-C5 (esp_sdr_replay.h, CONFIG_ESP_SDR_REPLAY).

Macro Definition Documentation

◆ ESP_SDR_REPLAY_MAX

#define ESP_SDR_REPLAY_MAX 16383U

Largest number of words in one pass (the engine's 14-bit count).

Function Documentation

◆ esp_sdr_replay_active()

bool esp_sdr_replay_active ( void )

Returns: Whether a replay holds the radio.

◆ esp_sdr_replay_buf()

uint32_t * esp_sdr_replay_buf ( size_t * words )

The sample buffer the engine plays from.

Parameters

words Set to its size in words.

Returns: The buffer; write it only while no replay runs.

◆ esp_sdr_replay_ctrl()

uint32_t esp_sdr_replay_ctrl ( void )

Returns: The trigger register as last read (bench use).

◆ esp_sdr_replay_restart()

int esp_sdr_replay_restart ( void )

Start a finished replay again, with the same settings and samples.

The output pauses between the done flag and the restart (see doc/hardware-quirks.md). Interrupts should be locked around wait and restart.

Returns: 0, or -EINVAL for no replay.

◆ esp_sdr_replay_start()

int esp_sdr_replay_start ( const struct esp_sdr_replay_cfg * cfg )

Turn the transmit chain on and start the engine.

Holds the radio until esp_sdr_replay_stop(), at the frequency set with esp_sdr_set_freq().

Returns: 0, -EINVAL for a bad setting, -EAGAIN before esp_sdr_init(), -EBUSY while a replay runs, -ERANGE for a frequency the chain cannot take.

◆ esp_sdr_replay_wait()

int esp_sdr_replay_wait	(	uint32_t	timeout_us,
		uint32_t *	cycles )

Wait for a finite replay to finish.