LP core was unable to boot when system was in deepsleep.
This was due to lp uart init in LP rom using XTAL as clk source,
which is normally powered down during sleep.
This would cause lp uart to get stuck while printing ROM output,
and the app would never boot.
Also fixed wrong wakeup cause used by HP core for ULP wake up
When using USB-serial-jtag for monitoring idf-monitor will lose connection
during deep sleep (because the peripheral powers down) and will need
some time to reconnect when we wake-up. In the ULP examples this would result in
the chip waking up->printing-> going back to sleep, before idf-monitor is even able
to connect, and users would erroneously assume the chip never woke up.
Add a 1 sec delay at the start of the examples to improve the user experience when
using jtag-serial.
This commit adds a minimal logging driver for the LP core. The logging
driver provides a printf function which is built on top of the LP UART
driver. The commit also adds an example to demonstrate how to use print
statements in an LP core program.
This commit adds a UART driver for the LP core to interact with the LP
UART. The commit also adds an example to demonstrate the usage of the LP
UART driver.
This commit adds a driver for reading the touch sensor from the ULP
RISC-V core during sleep. The commit also adds an example to demonstrate
this feature.
Closes https://github.com/espressif/esp-idf/issues/10480
The CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP option is enabled
by default for the following examples:
- system/deep_sleep,
- system/ulp,
- system/ulp_adc.
The argument to ulp_run should be expressed in 32-bit words. Both the
address of ulp_entry and RTC_SLOW_MEM already are uint32_t*, so their
difference is the difference in addresses divided by sizeof(uint32_t).
Therefore the extra division by sizeof(uint32_t) is not needed.
- call rtc_gpio_init for pins which aren't configured as RTC by default
- for RTC IOs 16 and 17, read higher part of the input register
- automatically convert GPIO number into RTC IO number
- use ulp_set_wakeup_period instead of writing to register
To increase the chances that the examples work out of the box, this
change is raising the default deep sleep wakeup delay to 1ms.
If GPIO15 is low at startup, ROM code takes less time to execute
(because no logging is performed), so more time may be needed to allow
flash chip to become ready.
