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SourceVuESP-IDF Framework and ExamplesESP-IDFi2c_slave_write_buffer()

i2c_slave_write_buffer() function

Write bytes to internal ringbuffer of the I2C slave data. When the TX fifo empty, the ISR will fill the hardware FIFO with the internal ringbuffer's data.

Syntax

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Summary

Declaration

Definition

from i2c.h:432

int i2c_slave_write_buffer(i2c_port_t i2c_num, const uint8_t *data, int size, TickType_t ticks_to_wait);

Implemented in i2c.c:1643

Arguments

Argument

Description

i2c_num

I2C port number

data

Bytes to write into internal buffer

size

Size, in bytes, of `data` buffer

ticks_to_wait

Maximum ticks to wait.

Return value

- ESP_FAIL (-1) Parameter error - Other (>=0) The number of data bytes pushed to the I2C slave buffer.

Notes

This function shall only be called in I2C slave mode.

References

Code

Location

int i2c_slave_write_buffer(i2c_port_t i2c_num, const uint8_t *data, int size, TickType_t ticks_to_wait)

i2c.c:1643

int i2c_slave_write_buffer(i2c_port_t i2c_num, const uint8_t *data, int size, TickType_t ticks_to_wait);

i2c.h:432

Call Tree

i2c_slave_write_buffer() calls 9 functions:

i2c_slave_write_buffer()

xQueueSemaphoreTake()

xRingbufferSend()

i2c_ll_slave_enable_tx_it()

Data Use

i2c_slave_write_buffer() reads 16 variables:

esp_log_level_t::ESP_LOG_ERROR

esp_log_level_t::ESP_LOG_WARN

esp_log_level_t::ESP_LOG_INFO

esp_log_level_t::ESP_LOG_DEBUG

esp_log_level_t::ESP_LOG_VERBOSE

i2c_port_t::I2C_NUM_MAX

i2c_mode_t::I2C_MODE_SLAVE

i2c_hal_context_t::dev

I2C_TAG

i2c_obj_t::mode

i2c_obj_t::slv_tx_mux

i2c_obj_t::tx_ring_buf

i2c_context_t::hal

i2c_context_t::spinlock

i2c_context

p_i2c_obj

i2c_slave_write_buffer()

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