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spi_slave_hal_get_rcv_bitlen() function
Get the length of last transaction, in bits. Should be called after ``spi_slave_hal_store_result``. Note that if last transaction is longer than configured before, the return value still the actual length.
Syntax
Implemented in ![]()
spi_slave_hal_iram.c:75
Return value
Length of the last transaction, in bits.
Related Functions
Found 13 other functions taking a ![]()
spi_slave_hal_context_t
argument:
Function
Description
Init the peripheral and the context.
Setup device-related configurations according to the settings in the context.
Rest peripheral registers to default value
Rest hw fifo in peripheral, for a CPU controlled trans
Push data needed to be transmit into hw fifo
Config transaction bit length for slave
Enable/Disable miso/mosi signals in peripheral
Trigger start a user-defined transaction.
Check whether the transaction is done (trans_done is set).
Post transaction operations, fetch data from the buffer and recorded the length.
Check whether we need to reset the DMA according to the status of last transactions. In ESP32, sometimes we may need to reset the DMA for the slave before the next transaction. Call this to check it.
Deinit the peripheral (and the context if needed).
References
Code
Location
Referrer
Call Tree
spi_slave_hal_get_rcv_bitlen() is called by 1 function:
Data Use
spi_slave_hal_get_rcv_bitlen() reads 1 variable: