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pulse_counter: Add ULP sources from Platformio example
Source: https://github.com/platformio/platform-espressif32/tree/develop/examples/espidf-ulp-pulse
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parent
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commit
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4 changed files with 227 additions and 2 deletions
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@ -1,3 +1,27 @@
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FILE(GLOB_RECURSE app_sources ${CMAKE_SOURCE_DIR}/src/*.*)
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idf_component_register(SRCS ${app_sources})
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idf_component_register(SRCS ${app_sources}
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INCLUDE_DIRS ""
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REQUIRES driver soc nvs_flash ulp)
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##
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## ULP support additions to component CMakeLists.txt.
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##
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## 1. The ULP app name must be unique (if multiple components use ULP).
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set(ulp_app_name ulp_main)
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##
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## 2. Specify all assembly source files.
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## Files should be placed into a separate directory (in this case, ulp/),
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## which should not be added to COMPONENT_SRCS.
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##TODO
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set(ulp_s_sources "../ulp/pulse_cnt.S" "../ulp/wake_up.S")
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##
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## 3. List all the component source files which include automatically
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## generated ULP export file, ${ulp_app_name}.h:
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set(ulp_exp_dep_srcs "components/pulse_counter/pulse_counter_sensor.cpp")
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##
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## 4. Call function to build ULP binary and embed in project using the argument
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## values above.
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ulp_embed_binary(${ulp_app_name} "${ulp_s_sources}" "${ulp_exp_dep_srcs}")
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#
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target_compile_options(${COMPONENT_LIB} PRIVATE "-Wno-format")
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@ -138,7 +138,16 @@ async def to_code(config):
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"src/CMakeLists.txt",
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os.path.join(os.path.dirname(__file__), "CMakeLists.txt"),
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)
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var = await sensor.new_sensor(config, config.get(CONF_USE_PCNT))
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esp32.add_extra_build_file(
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"ulp/pulse_cnt.S",
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os.path.join(os.path.dirname(__file__), "ulp/pulse_cnt.S"),
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)
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esp32.add_extra_build_file(
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"ulp/wake_up.S", os.path.join(os.path.dirname(__file__), "ulp/wake_up.S")
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)
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esp32.add_idf_sdkconfig_option("CONFIG_ULP_COPROC_ENABLED", True)
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esp32.add_idf_sdkconfig_option("CONFIG_ULP_COPROC_TYPE_FSM", True)
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esp32.add_idf_sdkconfig_option("CONFIG_ULP_COPROC_RESERVE_MEM", 1024)
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await cg.register_component(var, config)
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pin = await cg.gpio_pin_expression(config[CONF_PIN])
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161
esphome/components/pulse_counter/ulp/pulse_cnt.S
Normal file
161
esphome/components/pulse_counter/ulp/pulse_cnt.S
Normal file
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@ -0,0 +1,161 @@
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/*
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* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* ULP Example: pulse counting
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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This file contains assembly code which runs on the ULP.
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ULP wakes up to run this code at a certain period, determined by the values
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in SENS_ULP_CP_SLEEP_CYCx_REG registers. On each wake up, the program checks
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the input on GPIO0. If the value is different from the previous one, the
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program "debounces" the input: on the next debounce_max_count wake ups,
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it expects to see the same value of input.
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If this condition holds true, the program increments edge_count and starts
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waiting for input signal polarity to change again.
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When the edge counter reaches certain value (set by the main program),
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this program running triggers a wake up from deep sleep.
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*/
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/* ULP assembly files are passed through C preprocessor first, so include directives
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and C macros may be used in these files
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*/
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#include "sdkconfig.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/rtc_io_reg.h"
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#include "soc/soc_ulp.h"
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#include "soc/sens_reg.h"
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/* Define variables, which go into .bss section (zero-initialized data) */
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.bss
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/* Next input signal edge expected: 0 (negative) or 1 (positive) */
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.global next_edge
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next_edge:
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.long 0
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/* Counter started when signal value changes.
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Edge is "debounced" when the counter reaches zero. */
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.global debounce_counter
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debounce_counter:
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.long 0
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/* Value to which debounce_counter gets reset.
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Set by the main program. */
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.global debounce_max_count
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debounce_max_count:
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.long 0
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/* Total number of signal edges acquired */
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.global edge_count
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edge_count:
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.long 0
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/* Number of edges to acquire before waking up the SoC.
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Set by the main program. */
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.global edge_count_to_wake_up
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edge_count_to_wake_up:
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.long 0
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/* RTC IO number used to sample the input signal.
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Set by main program. */
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.global io_number
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io_number:
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.long 0
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/* Code goes into .text section */
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.text
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.global entry
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entry:
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/* Load io_number */
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move r3, io_number
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ld r3, r3, 0
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#if CONFIG_IDF_TARGET_ESP32S2
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/* ESP32S2 powers down RTC periph when entering deep sleep and thus by association SENS_SAR_IO_MUX_CONF_REG */
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WRITE_RTC_FIELD(SENS_SAR_IO_MUX_CONF_REG, SENS_IOMUX_CLK_GATE_EN, 1)
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#elif CONFIG_IDF_TARGET_ESP32S3
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/* ESP32S3 powers down RTC periph when entering deep sleep and thus by association SENS_SAR_PERI_CLK_GATE_CONF_REG */
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WRITE_RTC_FIELD(SENS_SAR_PERI_CLK_GATE_CONF_REG, SENS_IOMUX_CLK_EN, 1);
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#endif
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/* Lower 16 IOs and higher need to be handled separately,
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* because r0-r3 registers are 16 bit wide.
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* Check which IO this is.
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*/
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move r0, r3
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jumpr read_io_high, 16, ge
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/* Read the value of lower 16 RTC IOs into R0 */
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READ_RTC_REG(RTC_GPIO_IN_REG, RTC_GPIO_IN_NEXT_S, 16)
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rsh r0, r0, r3
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jump read_done
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/* Read the value of RTC IOs 16-17, into R0 */
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read_io_high:
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READ_RTC_REG(RTC_GPIO_IN_REG, RTC_GPIO_IN_NEXT_S + 16, 2)
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sub r3, r3, 16
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rsh r0, r0, r3
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read_done:
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and r0, r0, 1
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/* State of input changed? */
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move r3, next_edge
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ld r3, r3, 0
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add r3, r0, r3
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and r3, r3, 1
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jump changed, eq
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/* Not changed */
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/* Reset debounce_counter to debounce_max_count */
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move r3, debounce_max_count
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move r2, debounce_counter
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ld r3, r3, 0
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st r3, r2, 0
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/* End program */
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halt
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.global changed
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changed:
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/* Input state changed */
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/* Has debounce_counter reached zero? */
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move r3, debounce_counter
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ld r2, r3, 0
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add r2, r2, 0 /* dummy ADD to use "jump if ALU result is zero" */
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jump edge_detected, eq
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/* Not yet. Decrement debounce_counter */
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sub r2, r2, 1
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st r2, r3, 0
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/* End program */
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halt
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.global edge_detected
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edge_detected:
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/* Reset debounce_counter to debounce_max_count */
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move r3, debounce_max_count
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move r2, debounce_counter
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ld r3, r3, 0
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st r3, r2, 0
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/* Flip next_edge */
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move r3, next_edge
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ld r2, r3, 0
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add r2, r2, 1
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and r2, r2, 1
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st r2, r3, 0
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/* Increment edge_count */
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move r3, edge_count
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ld r2, r3, 0
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add r2, r2, 1
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st r2, r3, 0
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/* Compare edge_count to edge_count_to_wake_up */
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move r3, edge_count_to_wake_up
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ld r3, r3, 0
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sub r3, r3, r2
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jump wake_up, eq
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/* Not yet. End program */
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halt
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31
esphome/components/pulse_counter/ulp/wake_up.S
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31
esphome/components/pulse_counter/ulp/wake_up.S
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@ -0,0 +1,31 @@
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/*
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* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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/* ULP assembly files are passed through C preprocessor first, so include directives
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and C macros may be used in these files
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*/
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#include "soc/rtc_cntl_reg.h"
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#include "soc/soc_ulp.h"
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#include "sdkconfig.h"
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.global wake_up
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wake_up:
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/* Check if the system is in sleep mode */
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#if CONFIG_IDF_TARGET_ESP32
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READ_RTC_REG(RTC_CNTL_LOW_POWER_ST_REG, 27, 1)
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#else
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READ_RTC_FIELD(RTC_CNTL_LOW_POWER_ST_REG, RTC_CNTL_MAIN_STATE_IN_IDLE)
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#endif
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move r1, r0
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/* Check if the system can be woken up */
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READ_RTC_FIELD(RTC_CNTL_LOW_POWER_ST_REG, RTC_CNTL_RDY_FOR_WAKEUP)
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/* If the system is in normal mode or if the system is in sleep mode with ready for wakeup set, we can signal the main CPU to wakeup */
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or r0, r0, r1
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jump wake_up, eq
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/* Wake up the SoC, end program */
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wake
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halt
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