Type Alias esp_idf_sys::sample_to_rmt_t

pub type sample_to_rmt_t = Option<unsafe extern "C" fn(src: *const c_void, dest: *mut rmt_item32_t, src_size: usize, wanted_num: usize, translated_size: *mut usize, item_num: *mut usize)>;

@brief User callback function to convert uint8_t type data to rmt format(rmt_item32_t).

   This function may be called from an ISR, so, the code should be short and efficient.

@param src Pointer to the buffer storing the raw data that needs to be converted to rmt format. @param[out] dest Pointer to the buffer storing the rmt format data. @param src_size The raw data size. @param wanted_num The number of rmt format data that wanted to get. @param[out] translated_size The size of the raw data that has been converted to rmt format, it should return 0 if no data is converted in user callback. @param[out] item_num The number of the rmt format data that actually converted to, it can be less than wanted_num if there is not enough raw data, but cannot exceed wanted_num. it should return 0 if no data was converted.

@note In fact, item_num should be a multiple of translated_size, e.g. : When we convert each byte of uint8_t type data to rmt format data, the relation between item_num and translated_size should be item_num = translated_size*8.

Aliased Type

enum sample_to_rmt_t {
    None,
    Some(unsafe extern "C" fn(_: *const c_void, _: *mut rmt_item32_t, _: usize, _: usize, _: *mut usize, _: *mut usize)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *const c_void, _: *mut rmt_item32_t, _: usize, _: usize, _: *mut usize, _: *mut usize))

Some value of type T.