Symbols

Files

Summary Syntax Arguments References Call Tree Data Use

SourceVuESP-IDF Framework and Exampleshost sampleessl_spi_wrbuf()

essl_spi_wrbuf() function

Write the shared buffer of the slave in ISR way

Syntax

Show:

Summary

Declaration

Definition

from essl_spi.h:193

esp_err_t essl_spi_wrbuf(spi_device_handle_t spi, const uint8_t *data, int addr, int len, uint32_t flags);

Implemented in essl_spi.c:131

Arguments

Argument

Description

spi

SPI device handle representing the slave

data

Buffer for data to send, strongly suggested to be in the DRAM

addr

Address of the slave shared buffer,

len

Length to write

flags

`SPI_TRANS_*` flags to control the transaction mode of the transaction to send.

Return value

- ESP_OK: success - or other return value from :cpp:func:`spi_device_transmit`.

Notes

``out_data`` should be prepared in words and in the DRAM. The buffer may be written in words by the DMA. When a byte is written, the remaining bytes in the same word will also be overwritten, even the ``len`` is shorter than a word.

References

Code

Location

Referrer

esp_err_t essl_spi_wrbuf(spi_device_handle_t spi, const uint8_t *data, int addr, int len, uint32_t flags)

essl_spi.c:131

esp_err_t essl_spi_wrbuf(spi_device_handle_t spi, const uint8_t *data, int addr, int len, uint32_t flags);

essl_spi.h:193

return essl_spi_wrbuf(ctx->spi, &value, addr, sizeof(uint8_t), 0);

essl_spi.c:415

essl_spi_write_reg()

Call Tree

essl_spi_wrbuf() is called by 1 function and calls 3 functions:

essl_spi_write_reg()

essl_spi_wrbuf()

spi_device_transmit()

get_hd_dummy_bits()

get_hd_command()

Data Use

essl_spi_wrbuf() reads 1 variable:

spi_command_t::SPI_CMD_HD_WRBUF

essl_spi_wrbuf()

Class Tree

All items filtered out

Override Tree

All items filtered out

Implementations

All items filtered out

Instances

Lifecycle

All items filtered out