This commit adds support for the LP I2C peripheral driver to be used by
the LP core. An example is also added to demonstrate the usage of the LP
I2C peripheral from the LP core.
The commit 88e4c06028 introduced a loop timeout for all ULP RISC-V I2C
transactions to avoid getting stuck in a forever loop. The loop timeout
was set to 500 msec by default. This commit improves on the concept by
making the loop timeout configurable via a Kconfig option in terms of
CPU ticks. If the timeout is set to -1 value then the transaction loops
will never timeout, therefore restoring the driver behavior before the
timeout was introduced.
The commit also updates the I2C Fast mode timings for esp32s2 which need
to be adjusted due to bus timing constraints.
Closes https://github.com/espressif/esp-idf/issues/11154
The current ULP RISC-V RTC I2C driver got stuck in an infinite loop if
there is a I2C transaction error. This commit amends the driver flow to
abort the read/write operation if met with errors. It also adds a loop
timeout to avoid getting stuck in an infinite loop.The commit also
updates the default bus timing parameters for RTC I2C to be faster.
This commit also adds documentation help to guide users when they meet
with issues while working with the RTC I2C driver on the ULP RISC-V coprocessor.
If the ULP sent the wake-up signal before the main CPU went to sleep,
then the test case would get stuck in sleep.
Increased delay before sending the wake-up signal.
This commit adds a new API ulp_reisv_reset() to enable reseting of the
ULP core from the main core. This is particularly necessary in case the
ULP crashes due to any reason. Earlier the only way to recover the ULP
was to do a power reset. This commit also adds new test cases which
exercise this scenario.
This commit fixes a bug wherein the RTC I2C peripheral got stuck after
the main CPU performs a soft reset by using esp_restart(). This is
because the RTC domain config registers for the RTC I2C domain are not
cleared after the soft restart and hence need to be cleared manually
while initializing the RTC I2C peripheral again.
Closes https://github.com/espressif/esp-idf/issues/10468
The RTC I2C peripheral always expects a I2C slave sub register address
to be programmed. If it is not programmed then a sub register address
available in SENS_SAR_I2C_CTRL_REG[18:11] is used for I2C read/write.
This commit updates the documentation of the API
ulp_riscv_i2c_master_set_slave_reg_addr() to clarify the same.
This commit fixes an issue where in the ULP RISC-V I2C example causes
a spurious wakeup of the main CPU because of a Trap signal when the ULP
core does not meet the wakeup threshold values. This was due to the fact
that the RTC_CNTL_COCPU_DONE signal was being set before the
RTC_CNTL_COCPU_SHUT_RESET_EN signal which was causing the the ULP RISC-V
core to not reset properly on each cycle.
Closes https://github.com/espressif/esp-idf/issues/10301
This commit adds support for using the RTC I2C peripheral on the ULP
RISC-V core for esp32s2 and esp32s3. It also adds an example to demonstrate the
usage of the RTC I2C peripheral.
This commit also modifies the rtc_i2c register structure files to enable
the use of bitfields in the ULP RISC-V RTC I2C driver.
There are multiple changes in this commit:
1. Unify the RISC-V and ULP-FSM code paths in esp32ulp_mapgen.py.
It seems that these were originally introduced because `nm` output
for the RISC-V case contained symbol sizes, while for the ULP-FSM
no symbol sizes were reported. This makes sense, because the
ULP-FSM object files are produced from assembly source, symbol
sizes have to be added manually using the .size directive.
In the case of RISC-V, the object files are built from C sources
and the sizes are automatically added by the compiler.
Now 'posix' output format is used for both RISC-V and ULP-FSM.
2. Move BASE_ADDR out of esp32ulp_mapgen.py. This now has to be passed
from CMake, which should make it easier to modify if a new chip
with a different RTC RAM base address is added.
3. Add C++ guards to the generated header file.
4. Switch from optparse to argparse for similarity with other IDF
tools.
5. Add type annotations.
* "dummy loop to force pre-processed linker file generation" seems to
be unnecessary. It looks like the idea was copied from the
dependency of ULP-FSM preprocessed source files on the LD script.
* Can use add_dependencies instead of
set_target_properties(...LINK_DEPENDS...) which is more readable
* Use target_link_options instead of target_link_libraries, which is
supported starting from CMake 3.13. Unlike target_link_libraries,
it doesn't require manually quoting the pats.
