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sdspi_host

内部関数です。通常は使いません。

利用方法

#include <driver/sdspi_host.h>

上記宣言で利用できます。

メンバー

sdspi_host_init()

Initialize SD SPI driver

esp_err_t sdspi_host_init()

戻り値

esp_err_t

sdspi_host_init_slot()

Initialize SD SPI driver for the specific SPI controller

esp_err_t sdspi_host_init_slot(int slot, const sdspi_slot_config_t *slot_config)

引数

  • int slot SPI controller to use (HSPI_HOST or VSPI_HOST)
  • sdspi_slot_config_tconst * slot_config pointer to slot configuration structure

戻り値

esp_err_t

sdspi_host_do_transaction()

Send command to the card and get response

This function returns when command is sent and response is received, or data is transferred, or timeout occurs. 

esp_err_t sdspi_host_do_transaction(int slot, sdmmc_command_t *cmdinfo)

引数

  • int slot SPI controller (HSPI_HOST or VSPI_HOST)
  • sdmmc_command_t* cmdinfo pointer to structure describing command and data to transfer

戻り値

esp_err_t

sdspi_host_set_card_clk()

Set card clock frequency

Currently only integer fractions of 40MHz clock can be used. For High Speed cards, 40MHz can be used. For Default Speed cards, 20MHz can be used. 

esp_err_t sdspi_host_set_card_clk(int slot, uint32_t freq_khz)

引数

  • int slot SPI controller (HSPI_HOST or VSPI_HOST)
  • uint32_t freq_khz card clock frequency, in kHz

戻り値

esp_err_t

sdspi_host_deinit()

Release resources allocated using sdspi_host_init

esp_err_t sdspi_host_deinit()

戻り値

esp_err_t