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|
menuconfig RT_USING_I2C
bool "Using I2C device drivers"
default n
help
Enable the RT-Thread I2C core so both DM aware controllers and legacy bus
drivers can register `struct rt_i2c_bus_device` objects, and client
drivers can issue transfers through the unified APIs. Select this on any
board that exposes an I2C peripheral or software bit-bang bus; disable it
only if you never interface with I2C sensors/PMICs/MCUs.
if RT_USING_I2C
config RT_I2C_DEBUG
bool "Use I2C debug message"
default n
help
Print verbose I2C transaction logs (start/stop, address, data) to the
console. Helpful while debugging board bring-up, but it slows down the
bus and should remain off in production firmware.
config RT_USING_I2C_BITOPS
bool "Use GPIO to simulate I2C"
default y
help
Build the generic bit-banging algorithm (`dev_i2c_bit_ops.c`) so
controller drivers or the software I2C backend can drive SCL/SDA pins
directly. Disable this only when every I2C controller is hardware-
assisted and you want to shave a few hundred bytes of code.
if RT_USING_I2C_BITOPS
config RT_I2C_BITOPS_DEBUG
bool "Use simulate I2C debug message"
default n
help
Emit timing-level diagnostics from the bit-bang implementation,
showing whether GPIO toggles are happening as expected. Useful to
diagnose board wiring or timing issues, but generates a lot of log
traffic and should stay disabled normally.
endif
menuconfig RT_USING_SOFT_I2C
bool "Use GPIO to soft simulate I2C"
default n
select RT_USING_PIN
select RT_USING_I2C_BITOPS
help
Instantiate one or more fully software I2C buses backed by GPIO pins.
Each enabled bus entry below lets you choose SCL/SDA pin numbers, the
exported bus name, and bit-bang timing. Use this when the SoC lacks an
available controller but you still need to connect low-speed sensors.
if RT_USING_SOFT_I2C
menuconfig RT_USING_SOFT_I2C0
bool "Enable I2C0 Bus (software simulation)"
default y
help
Create a software I2C bus named by `RT_SOFT_I2C0_BUS_NAME`
using the selected SCL/SDA pins. Disable it if the board does
not wire up a first soft I2C channel.
if RT_USING_SOFT_I2C0
config RT_SOFT_I2C0_SCL_PIN
int "SCL pin number"
range 0 32767
default 1
config RT_SOFT_I2C0_SDA_PIN
int "SDA pin number"
range 0 32767
default 2
config RT_SOFT_I2C0_BUS_NAME
string "Bus name"
default "i2c0"
config RT_SOFT_I2C0_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C0_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C1
bool "Enable I2C1 Bus (software simulation)"
default y
help
Enable the second software I2C controller and configure its
pins/name/timing below when multiple bit-bang buses are wired
out on the PCB.
if RT_USING_SOFT_I2C1
config RT_SOFT_I2C1_SCL_PIN
int "SCL pin number"
range 0 32767
default 3
config RT_SOFT_I2C1_SDA_PIN
int "SDA pin number"
range 0 32767
default 4
config RT_SOFT_I2C1_BUS_NAME
string "Bus name"
default "i2c1"
config RT_SOFT_I2C1_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C1_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C2
bool "Enable I2C2 Bus (software simulation)"
default n
help
Optional third soft I2C bus for boards that expose additional
GPIO pairs. Turn this on only if you really route the
corresponding pins.
if RT_USING_SOFT_I2C2
config RT_SOFT_I2C2_SCL_PIN
int "SCL pin number"
range 0 32767
default 5
config RT_SOFT_I2C2_SDA_PIN
int "SDA pin number"
range 0 32767
default 6
config RT_SOFT_I2C2_BUS_NAME
string "Bus name"
default "i2c2"
config RT_SOFT_I2C2_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C2_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C3
bool "Enable I2C3 Bus (software simulation)"
default n
help
Same as above but for the fourth software I2C instance.
if RT_USING_SOFT_I2C3
config RT_SOFT_I2C3_SCL_PIN
int "SCL pin number"
range 0 32767
default 7
config RT_SOFT_I2C3_SDA_PIN
int "SDA pin number"
range 0 32767
default 8
config RT_SOFT_I2C3_BUS_NAME
string "Bus name"
default "i2c3"
config RT_SOFT_I2C3_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C3_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C4
bool "Enable I2C4 Bus (software simulation)"
default n
help
Enable the fifth configurable bit-bang bus if more GPIO-based
channels are required.
if RT_USING_SOFT_I2C4
config RT_SOFT_I2C4_SCL_PIN
int "SCL pin number"
range 0 32767
default 9
config RT_SOFT_I2C4_SDA_PIN
int "SDA pin number"
range 0 32767
default 10
config RT_SOFT_I2C4_BUS_NAME
string "Bus name"
default "i2c4"
config RT_SOFT_I2C4_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C4_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C5
bool "Enable I2C5 Bus (software simulation)"
default n
help
Enable the sixth configurable bit-bang bus when the hardware
exposes yet another sensor connector.
if RT_USING_SOFT_I2C5
config RT_SOFT_I2C5_SCL_PIN
int "SCL pin number"
range 0 32767
default 11
config RT_SOFT_I2C5_SDA_PIN
int "SDA pin number"
range 0 32767
default 12
config RT_SOFT_I2C5_BUS_NAME
string "Bus name"
default "i2c5"
config RT_SOFT_I2C5_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C5_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C6
bool "Enable I2C6 Bus (software simulation)"
default n
help
Enable the seventh software bus; use only on complex boards
because each additional bus increases code/data usage.
if RT_USING_SOFT_I2C6
config RT_SOFT_I2C6_SCL_PIN
int "SCL pin number"
range 0 32767
default 13
config RT_SOFT_I2C6_SDA_PIN
int "SDA pin number"
range 0 32767
default 14
config RT_SOFT_I2C6_BUS_NAME
string "Bus name"
default "i2c6"
config RT_SOFT_I2C6_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C6_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C7
bool "Enable I2C7 Bus (software simulation)"
default n
help
Provide an eighth configurable software bus if still more GPIO
pairs are required for isolated peripherals.
if RT_USING_SOFT_I2C7
config RT_SOFT_I2C7_SCL_PIN
int "SCL pin number"
range 0 32767
default 15
config RT_SOFT_I2C7_SDA_PIN
int "SDA pin number"
range 0 32767
default 16
config RT_SOFT_I2C7_BUS_NAME
string "Bus name"
default "i2c7"
config RT_SOFT_I2C7_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C7_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
menuconfig RT_USING_SOFT_I2C8
bool "Enable I2C8 Bus (software simulation)"
default n
help
Final reserved entry for a ninth soft I2C controller. Enable
it only when the design needs that many bit-bang buses; leave
disabled otherwise to save resources.
if RT_USING_SOFT_I2C8
config RT_SOFT_I2C8_SCL_PIN
int "SCL pin number"
range 0 32767
default 17
config RT_SOFT_I2C8_SDA_PIN
int "SDA pin number"
range 0 32767
default 18
config RT_SOFT_I2C8_BUS_NAME
string "Bus name"
default "i2c8"
config RT_SOFT_I2C8_TIMING_DELAY
int "Timing delay (us)"
range 0 32767
default 10
config RT_SOFT_I2C8_TIMING_TIMEOUT
int "Timing timeout (tick)"
range 0 32767
default 10
endif
endif
endif
if RT_USING_DM && RT_USING_I2C
osource "$(SOC_DM_I2C_DIR)/Kconfig"
endif
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