Functions
int	esp_sdr_tx_loop_begin (enum esp_sdr_rate rate)
	Take the radio and switch the front end to TX at the selected step.
uint32_t *	esp_sdr_tx_loop_buf (int bank, size_t *words)
int	esp_sdr_tx_loop_start (int bank, size_t count)
	(Re)start looping over the first `count` words of `bank`.
void	esp_sdr_tx_loop_halt (void)
	Stop playback at once; the session stays open.
void	esp_sdr_tx_loop_end (void)
	Stop playback, back to RX, release the radio.

Detailed Description

Gapless playback of prepared banks at the DAC rate: the engine replays the first count words of one bank back to back until halted. While it plays one bank, the CPUs may write the other (CONFIG_ESP_SDR_BANK1), then restart on it. A session holds the radio from esp_sdr_tx_loop_begin() to esp_sdr_tx_loop_end(), so receive calls wait meanwhile.

Function Documentation

◆ esp_sdr_tx_loop_begin()

int esp_sdr_tx_loop_begin ( enum esp_sdr_rate rate )

Take the radio and switch the front end to TX at the selected step.

Return values

0	on success.
-EINVAL	for an unsupported rate.
-EAGAIN	if esp_sdr_init() has not run.

◆ esp_sdr_tx_loop_buf()

uint32_t * esp_sdr_tx_loop_buf	(	int	bank,
		size_t *	words )

Returns: Bank bank (0 to ESP_SDR_BANKS - 1) and its size in words through words, NULL if there is no such bank. Write it with esp_sdr_tx_word() words only while the engine plays another bank or is halted.

◆ esp_sdr_tx_loop_start()

int esp_sdr_tx_loop_start	(	int	bank,
		size_t	count )

(Re)start looping over the first count words of bank.

Restarting cuts the running pass; playback of the new one starts at once.