I2C_LINK_RECOMMENDED_SIZE macro

The following macro is used to determine the recommended size of the buffer to pass to `i2c_cmd_link_create_static()` function. It requires one parameter, `TRANSACTIONS`, describing the number of transactions intended to be performed on the I2C port. For example, if one wants to perform a read on an I2C device register, `TRANSACTIONS` must be at least 2, because the commands required are the following: - write device register - read register content Signals such as "(repeated) start", "stop", "nack", "ack" shall not be counted.

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Declaration

from i2c.h:52

#define I2C_LINK_RECOMMENDED_SIZE(TRANSACTIONS) (2 * I2C_INTERNAL_STRUCT_SIZE + I2C_INTERNAL_STRUCT_SIZE * \ (5 * TRANSACTIONS))

Arguments

Argument

TRANSACTIONS

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Location

#define I2C_LINK_RECOMMENDED_SIZE(TRANSACTIONS) (2 * I2C_INTERNAL_STRUCT_SIZE + I2C_INTERNAL_STRUCT_SIZE * \

i2c.h:52

#define CMD_HANDLER_BUFFER_SIZE I2C_LINK_RECOMMENDED_SIZE(2) // only 2 operations will be queued in the handler ATTOW

esp_lcd_panel_io_i2c_v1.c:26

I2C_LINK_RECOMMENDED_SIZE macro

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