sigmadelta¶

内部関数です。通常は使いません。

利用方法¶

#include <driver/sigmadelta.h>

上記宣言で利用できます。

メンバー¶

sigmadelta_config()¶

Configure Sigma-delta channel

esp_err_t sigmadelta_config(const sigmadelta_config_t *config)

引数

sigmadelta_config_tconst * config Pointer of Sigma-delta channel configuration struct

戻り値

esp_err_t

sigmadelta_set_duty()¶

Set Sigma-delta channel duty.

esp_err_t sigmadelta_set_duty(sigmadelta_channel_t channel, int8_t duty)

引数

sigmadelta_channel_t channel Sigma-delta channel number
int8_t duty Sigma-delta duty of one channel, the value ranges from -128 to 127, recommended range is -90 ~ 90. The waveform is more like a random one in this range.

戻り値

esp_err_t

sigmadelta_set_prescale()¶

Set Sigma-delta channel's clock pre-scale value. The source clock is APP_CLK, 80MHz. The clock frequency of the sigma-delta channel is APP_CLK / pre_scale

esp_err_t sigmadelta_set_prescale(sigmadelta_channel_t channel, uint8_t prescale)

引数

sigmadelta_channel_t channel Sigma-delta channel number
uint8_t prescale The divider of source clock, ranges from 0 to 255

戻り値

esp_err_t

sigmadelta_set_pin()¶

Set Sigma-delta signal output pin

esp_err_t sigmadelta_set_pin(sigmadelta_channel_t channel, gpio_num_t gpio_num)

引数

sigmadelta_channel_t channel Sigma-delta channel number
gpio_num_t gpio_num GPIO number of output pin.

戻り値

esp_err_t