esp-idf/components/driver/Kconfig
Michael (XIAO Xufeng) 8cddfa35b8 spi: fix the crash when callbacks are not in the IRAM
Introduced in 9c23b8e5 and 4f87a62f. To get higher speed, menuconfig
options are added to put ISR and other functions into the IRAM.  The
interrupt flag ESP_INTR_FLAG_IRAM is also mistakenly set when the ISR is
put into the IRAM. However callbacks, which are wrote by the user, are
called in the master and slave ISR. The user may not be aware of that
these callbacks are not disabled during flash operations. Any cache miss
during flash operation will cause panic.

Essentially IRAM functions and intrrupt flag ESP_INTR_FLAG_IRAM are
different, the latter means not disabling the ISR during flash
operations.  New bus_config flag intr_flags is offered to help set the
interrupt attribute, including priority level, SHARED, IRAM (not
disabled during flash operations).  It introduced a small BREAK to
IDFv3.1 (but the same as IDFv3.0) that the user has to manually set IRAM
flag now (therefore he's aware of the IRAM thing) to void the ISR being
disabled during flash operations.
2018-11-20 13:07:13 +08:00

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menu "Driver configurations"
menu "ADC configuration"
config ADC_FORCE_XPD_FSM
bool "Use the FSM to control ADC power"
default n
help
ADC power can be controlled by the FSM instead of software. This allows the ADC to
be shut off when it is not working leading to lower power consumption. However
using the FSM control ADC power will increase the noise of ADC.
config ADC2_DISABLE_DAC
bool "Disable DAC when ADC2 is used on GPIO 25 and 26"
default y
help
If this is set, the ADC2 driver will disables the output of the DAC corresponding to the specified channel. This is the default value.
For testing, disable this option so that we can measure the output of DAC by internal ADC.
endmenu # ADC Configuration
menu "SPI configuration"
config SPI_MASTER_IN_IRAM
bool "Place transmitting functions of SPI master into IRAM"
default n
select SPI_MASTER_ISR_IN_IRAM
help
Normally only the ISR of SPI master is placed in the IRAM, so that it
can work without the flash when interrupt is triggered.
For other functions, there's some possibility that the flash cache
miss when running inside and out of SPI functions, which may increase
the interval of SPI transactions.
Enable this to put ``queue_trans``, ``get_trans_result`` and
``transmit`` functions into the IRAM to avoid possible cache miss.
During unit test, this is enabled to measure the ideal case of api.
config SPI_MASTER_ISR_IN_IRAM
bool "Place SPI master ISR function into IRAM"
default y
help
Place the SPI master ISR in to IRAM to avoid possible cache miss.
Also you can forbid the ISR being disabled during flash writing
access, by add ESP_INTR_FLAG_IRAM when initializing the driver.
config SPI_SLAVE_IN_IRAM
bool "Place transmitting functions of SPI slave into IRAM"
default n
select SPI_SLAVE_ISR_IN_IRAM
help
Normally only the ISR of SPI slave is placed in the IRAM, so that it
can work without the flash when interrupt is triggered.
For other functions, there's some possibility that the flash cache
miss when running inside and out of SPI functions, which may increase
the interval of SPI transactions.
Enable this to put ``queue_trans``, ``get_trans_result`` and
``transmit`` functions into the IRAM to avoid possible cache miss.
config SPI_SLAVE_ISR_IN_IRAM
bool "Place SPI slave ISR function into IRAM"
default y
help
Place the SPI slave ISR in to IRAM to avoid possible cache miss.
Also you can forbid the ISR being disabled during flash writing
access, by add ESP_INTR_FLAG_IRAM when initializing the driver.
endmenu # SPI Configuration
endmenu # Driver configurations