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添加智能灯固件代码
This commit is contained in:
kerwincui
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idf_component_register(SRCS "ulp_adc_example_main.c"
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INCLUDE_DIRS ""
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REQUIRES soc nvs_flash ulp driver)
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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_${COMPONENT_NAME})
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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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set(ulp_s_sources "ulp/adc.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, ${ulp_app_name}.h:
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set(ulp_exp_dep_srcs "ulp_adc_example_main.c")
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#
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# 4. Call function to build ULP binary and embed in project using the argument
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# values above.
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ulp_embed_binary(${ulp_app_name} "${ulp_s_sources}" "${ulp_exp_dep_srcs}")
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#
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# ULP support additions to component makefile.
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#
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# 1. ULP_APP_NAME must be unique (if multiple components use ULP)
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# Default value, override if necessary:
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ULP_APP_NAME ?= ulp_$(COMPONENT_NAME)
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#
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# 2. Specify all assembly source files here.
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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_SRCDIRS.
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ULP_S_SOURCES = $(addprefix $(COMPONENT_PATH)/ulp/, \
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adc.S \
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)
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#
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# 3. List all the component object files which include automatically
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# generated ULP export file, $(ULP_APP_NAME).h:
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ULP_EXP_DEP_OBJECTS := ulp_adc_example_main.o
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#
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# 4. Include build rules for ULP program
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include $(IDF_PATH)/components/ulp/component_ulp_common.mk
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#
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# End of ULP support additions to component makefile.
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#
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/* ULP Example: using ADC in deep sleep
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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
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measures input voltage on the given ADC channel 'adc_oversampling_factor'
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times. Measurements are accumulated and average value is calculated.
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Average value is compared to the two thresholds: 'low_thr' and 'high_thr'.
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If the value is less than 'low_thr' or more than 'high_thr', ULP wakes up
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the chip 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 "soc/rtc_cntl_reg.h"
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#include "soc/soc_ulp.h"
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/* ADC1 channel 6, GPIO34 */
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.set adc_channel, 6
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/* Configure the number of ADC samples to average on each measurement.
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For convenience, make it a power of 2. */
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.set adc_oversampling_factor_log, 2
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.set adc_oversampling_factor, (1 << adc_oversampling_factor_log)
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/* Define variables, which go into .bss section (zero-initialized data) */
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.bss
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/* Low threshold of ADC reading.
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Set by the main program. */
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.global low_thr
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low_thr:
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.long 0
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/* High threshold of ADC reading.
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Set by the main program. */
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.global high_thr
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high_thr:
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.long 0
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/* Counter of measurements done */
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.global sample_counter
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sample_counter:
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.long 0
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.global last_result
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last_result:
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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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/* increment sample counter */
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move r3, sample_counter
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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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/* do measurements using ADC */
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/* r0 will be used as accumulator */
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move r0, 0
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/* initialize the loop counter */
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stage_rst
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measure:
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/* measure and add value to accumulator */
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adc r1, 0, adc_channel + 1
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add r0, r0, r1
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/* increment loop counter and check exit condition */
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stage_inc 1
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jumps measure, adc_oversampling_factor, lt
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/* divide accumulator by adc_oversampling_factor.
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Since it is chosen as a power of two, use right shift */
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rsh r0, r0, adc_oversampling_factor_log
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/* averaged value is now in r0; store it into last_result */
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move r3, last_result
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st r0, r3, 0
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/* compare with low_thr; wake up if value < low_thr */
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move r3, low_thr
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ld r3, r3, 0
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sub r3, r0, r3
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jump wake_up, ov
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/* compare with high_thr; wake up if value > high_thr */
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move r3, high_thr
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ld r3, r3, 0
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sub r3, r3, r0
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jump wake_up, ov
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/* value within range, end the program */
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.global exit
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exit:
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halt
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.global wake_up
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wake_up:
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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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and r0, r0, 1
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jump exit, eq
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/* Wake up the SoC, end program */
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wake
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WRITE_RTC_FIELD(RTC_CNTL_STATE0_REG, RTC_CNTL_ULP_CP_SLP_TIMER_EN, 0)
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halt
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@@ -0,0 +1,100 @@
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/* ULP Example
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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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*/
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#include <stdio.h>
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#include <string.h>
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#include "esp_sleep.h"
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#include "nvs.h"
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#include "nvs_flash.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/sens_reg.h"
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#include "driver/gpio.h"
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#include "driver/rtc_io.h"
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#include "driver/adc.h"
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#include "driver/dac.h"
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#include "esp32/ulp.h"
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#include "ulp_main.h"
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extern const uint8_t ulp_main_bin_start[] asm("_binary_ulp_main_bin_start");
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extern const uint8_t ulp_main_bin_end[] asm("_binary_ulp_main_bin_end");
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/* This function is called once after power-on reset, to load ULP program into
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* RTC memory and configure the ADC.
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*/
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static void init_ulp_program(void);
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/* This function is called every time before going into deep sleep.
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* It starts the ULP program and resets measurement counter.
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*/
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static void start_ulp_program(void);
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void app_main(void)
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{
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esp_sleep_wakeup_cause_t cause = esp_sleep_get_wakeup_cause();
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if (cause != ESP_SLEEP_WAKEUP_ULP) {
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printf("Not ULP wakeup\n");
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init_ulp_program();
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} else {
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printf("Deep sleep wakeup\n");
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printf("ULP did %d measurements since last reset\n", ulp_sample_counter & UINT16_MAX);
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printf("Thresholds: low=%d high=%d\n", ulp_low_thr, ulp_high_thr);
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ulp_last_result &= UINT16_MAX;
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printf("Value=%d was %s threshold\n", ulp_last_result,
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ulp_last_result < ulp_low_thr ? "below" : "above");
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}
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printf("Entering deep sleep\n\n");
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start_ulp_program();
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ESP_ERROR_CHECK( esp_sleep_enable_ulp_wakeup() );
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esp_deep_sleep_start();
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}
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static void init_ulp_program(void)
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{
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esp_err_t err = ulp_load_binary(0, ulp_main_bin_start,
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(ulp_main_bin_end - ulp_main_bin_start) / sizeof(uint32_t));
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ESP_ERROR_CHECK(err);
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/* Configure ADC channel */
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/* Note: when changing channel here, also change 'adc_channel' constant
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in adc.S */
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adc1_config_channel_atten(ADC1_CHANNEL_6, ADC_ATTEN_DB_11);
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#if CONFIG_IDF_TARGET_ESP32
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adc1_config_width(ADC_WIDTH_BIT_12);
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#elif CONFIG_IDF_TARGET_ESP32S2
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adc1_config_width(ADC_WIDTH_BIT_13);
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#endif
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adc1_ulp_enable();
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/* Set low and high thresholds, approx. 1.35V - 1.75V*/
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ulp_low_thr = 1500;
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ulp_high_thr = 2000;
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/* Set ULP wake up period to 20ms */
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ulp_set_wakeup_period(0, 20000);
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/* Disconnect GPIO12 and GPIO15 to remove current drain through
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* pullup/pulldown resistors.
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* GPIO12 may be pulled high to select flash voltage.
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*/
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rtc_gpio_isolate(GPIO_NUM_12);
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rtc_gpio_isolate(GPIO_NUM_15);
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#if CONFIG_IDF_TARGET_ESP32
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esp_deep_sleep_disable_rom_logging(); // suppress boot messages
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#endif
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}
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static void start_ulp_program(void)
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{
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/* Reset sample counter */
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ulp_sample_counter = 0;
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/* Start the program */
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esp_err_t err = ulp_run(&ulp_entry - RTC_SLOW_MEM);
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ESP_ERROR_CHECK(err);
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}
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