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SourceVuESP-IDF Framework and ExamplesESP-IDFsdmmc_host_set_bus_width()

sdmmc_host_set_bus_width() function

Select bus width to be used for data transfer SD/MMC card must be initialized prior to this command, and a command to set bus width has to be sent to the card (e.g. SD_APP_SET_BUS_WIDTH)

Syntax

Show:

Summary

Declaration

Definition

from sdmmc_host.h:115

esp_err_t sdmmc_host_set_bus_width(int slot, size_t width);

Implemented in sdmmc_host.c:943

Arguments

Argument

Description

slot

slot number (SDMMC_HOST_SLOT_0 or SDMMC_HOST_SLOT_1)

width

bus width (1, 4, or 8 for slot 0; 1 or 4 for slot 1)

Return value

- ESP_OK on success - ESP_ERR_INVALID_ARG if slot number or width is not valid

Notes

This function is not thread safe

Examples

sdmmc_host_set_bus_width() is referenced by 7 libraries and example projects:

simple_sniffer sample

emmc sample

perf_benchmark sample

References

from 0/7 examples

Code

Location

Referrer

esp_err_t sdmmc_host_set_bus_width(int slot, size_t width)

sdmmc_host.c:943

esp_err_t sdmmc_host_set_bus_width(int slot, size_t width);

sdmmc_host.h:115

ret = sdmmc_host_set_bus_width(slot, 1);

sdmmc_host.c:806

sdmmc_host_init_slot()

Call Tree

from 0/7 examples

sdmmc_host_set_bus_width() is called by 1 function and calls 4 functions:

sdmmc_host_init_slot()

sdmmc_host_set_bus_width()

esp_log_timestamp()

esp_log_write()

sdmmc_ll_set_card_width()

configure_pin()

Data Use

from 0/7 examples

sdmmc_host_set_bus_width() reads 20 variables:

Class Tree

from 0/7 examples

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Override Tree

from 0/7 examples

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Implementations

from 0/7 examples

sdmmc_host_set_bus_width() is implemented by 1 functions:

sdmmc_host_set_bus_width()

sdmmc_host_t::set_bus_width

Instances

from 0/7 examples

Lifecycle

from 0/7 examples

All items filtered out