kopia lustrzana https://github.com/espressif/esp-idf
179 wiersze
6.0 KiB
C
179 wiersze
6.0 KiB
C
/*
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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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#include <stdio.h>
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#include "sdkconfig.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/semphr.h"
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#include "unity.h"
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#include "driver/gpio_filter.h"
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#include "driver/dedic_gpio.h"
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#include "soc/soc_caps.h"
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#if SOC_GPIO_SUPPORT_PIN_GLITCH_FILTER
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TEST_CASE("GPIO pin glitch filter life cycle", "[gpio_filter]")
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{
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gpio_glitch_filter_handle_t filter = NULL;
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gpio_pin_glitch_filter_config_t config = {
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.clk_src = GLITCH_FILTER_CLK_SRC_DEFAULT,
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};
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TEST_ESP_OK(gpio_new_pin_glitch_filter(&config, &filter));
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TEST_ESP_OK(gpio_glitch_filter_enable(filter));
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// can't delete filter if it's not disabled
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TEST_ESP_ERR(ESP_ERR_INVALID_STATE, gpio_del_glitch_filter(filter));
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TEST_ESP_OK(gpio_glitch_filter_disable(filter));
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TEST_ESP_OK(gpio_del_glitch_filter(filter));
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}
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#endif // SOC_GPIO_SUPPORT_PIN_GLITCH_FILTER
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#if SOC_GPIO_FLEX_GLITCH_FILTER_NUM > 0
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TEST_CASE("GPIO flex glitch filter life cycle", "[gpio_filter]")
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{
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gpio_glitch_filter_handle_t filters[SOC_GPIO_FLEX_GLITCH_FILTER_NUM];
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gpio_flex_glitch_filter_config_t config = {
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.clk_src = GLITCH_FILTER_CLK_SRC_DEFAULT,
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};
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// install filter with wrong parameters
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TEST_ESP_ERR(ESP_ERR_INVALID_ARG, gpio_new_flex_glitch_filter(&config, &filters[0]));
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config.window_thres_ns = 75;
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config.window_width_ns = 100;
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for (int i = 0; i < SOC_GPIO_FLEX_GLITCH_FILTER_NUM; i++) {
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TEST_ESP_OK((gpio_new_flex_glitch_filter(&config, &filters[i])));
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}
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// no more hardware resource
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TEST_ESP_ERR(ESP_ERR_NOT_FOUND, gpio_new_flex_glitch_filter(&config, &filters[0]));
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TEST_ESP_OK(gpio_glitch_filter_enable(filters[0]));
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// can't delete filter if it's not disabled
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TEST_ESP_ERR(ESP_ERR_INVALID_STATE, gpio_del_glitch_filter(filters[0]));
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TEST_ESP_OK(gpio_glitch_filter_disable(filters[0]));
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for (int i = 0; i < SOC_GPIO_FLEX_GLITCH_FILTER_NUM; i++) {
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TEST_ESP_OK(gpio_del_glitch_filter(filters[i]));
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}
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}
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/**
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* @brief In order to generate the short glitch pulse, we use CPU CSR register to control the GPIO level,
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* which is also called the Fast GPIO or Dedicated GPIO.
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* @note Because the CPU instruction / CSR register is not compatible in all ESP chips,
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* at the moment, this test only works for Espressif's RISC-V core (e.g. ESP32C6)
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*/
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#if SOC_DEDICATED_GPIO_SUPPORTED
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#include "hal/dedic_gpio_cpu_ll.h"
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static void test_gpio_intr_callback(void *args)
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{
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SemaphoreHandle_t sem = (SemaphoreHandle_t)args;
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BaseType_t high_task_wakeup = pdFALSE;
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esp_rom_printf("event fired\r\n");
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xSemaphoreGiveFromISR(sem, &high_task_wakeup);
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if (high_task_wakeup) {
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esp_rom_printf("high priority task wake up\r\n");
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}
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}
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// put the simulation code in the IRAM to avoid cache miss
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NOINLINE_ATTR IRAM_ATTR static void test_gpio_simulate_glitch_pulse(void)
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{
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static portMUX_TYPE s_lock = portMUX_INITIALIZER_UNLOCKED;
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// the following code is used to generate a short glitch pulse
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// around 20ns @CPU160MHz, 40ns @CPU96MHz
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// pull high for 4 CPU cycles, to ensure the short pulse can be sampled by GPIO
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// we don't want any preemption to happen during the glitch signal generation
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portENTER_CRITICAL(&s_lock);
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asm volatile(
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"csrrsi zero, %0, 0x1\n"
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"csrrsi zero, %0, 0x1\n"
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"csrrsi zero, %0, 0x1\n"
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"csrrsi zero, %0, 0x1\n"
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"csrrci zero, %0, 0x1"
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:: "i"(CSR_GPIO_OUT_USER)
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);
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portEXIT_CRITICAL(&s_lock);
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}
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TEST_CASE("GPIO flex glitch filter enable/disable", "[gpio_filter]")
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{
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const gpio_num_t test_gpio = 2;
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printf("initialize GPIO for input and out\r\n");
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gpio_config_t gpio_cfg = {
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.mode = GPIO_MODE_INPUT_OUTPUT,
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.pin_bit_mask = BIT64(test_gpio),
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.intr_type = GPIO_INTR_POSEDGE,
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.pull_down_en = GPIO_PULLDOWN_ENABLE,
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};
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TEST_ESP_OK(gpio_config(&gpio_cfg));
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printf("install fast gpio to generate the glitch signal\r\n");
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dedic_gpio_bundle_handle_t bundle = NULL;
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dedic_gpio_bundle_config_t bundle_cfg = {
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.gpio_array = (int[]){test_gpio},
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.array_size = 1,
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.flags.out_en = true,
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};
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TEST_ESP_OK(dedic_gpio_new_bundle(&bundle_cfg, &bundle));
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// initial output value to zero
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asm volatile("csrrci zero, %0, 0x1" :: "i"(CSR_GPIO_OUT_USER));
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printf("apply glitch filter to the GPIO\r\n");
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gpio_glitch_filter_handle_t filter;
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gpio_flex_glitch_filter_config_t filter_cfg = {
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.clk_src = GLITCH_FILTER_CLK_SRC_DEFAULT,
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.gpio_num = test_gpio,
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.window_thres_ns = 500,
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.window_width_ns = 500,
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};
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TEST_ESP_OK((gpio_new_flex_glitch_filter(&filter_cfg, &filter)));
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printf("install gpio interrupt\r\n");
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gpio_install_isr_service(0);
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SemaphoreHandle_t sem = xSemaphoreCreateBinary();
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TEST_ESP_OK(gpio_isr_handler_add(test_gpio, test_gpio_intr_callback, sem));
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printf("enable the glitch filter\r\n");
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TEST_ESP_OK(gpio_glitch_filter_enable(filter));
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printf("generate rising edge glitch signal\r\n");
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for (int i = 0; i < 10; i++) {
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test_gpio_simulate_glitch_pulse();
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}
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// should timeout, because the glitch is filtered out
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TEST_ASSERT_EQUAL(pdFALSE, xSemaphoreTake(sem, pdMS_TO_TICKS(1000)));
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printf("disable the glitch filter\r\n");
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TEST_ESP_OK(gpio_glitch_filter_disable(filter));
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printf("generate rising edge glitch signal again\r\n");
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test_gpio_simulate_glitch_pulse();
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// this time we should see the GPIO interrupt fired up
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TEST_ASSERT_EQUAL(pdTRUE, xSemaphoreTake(sem, pdMS_TO_TICKS(1000)));
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TEST_ESP_OK(gpio_isr_handler_remove(test_gpio));
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gpio_uninstall_isr_service();
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printf("disable gpio glitch filter\r\n");
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TEST_ESP_OK(gpio_del_glitch_filter(filter));
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TEST_ESP_OK(dedic_gpio_del_bundle(bundle));
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vSemaphoreDelete(sem);
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}
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#endif // SOC_DEDICATED_GPIO_SUPPORTED
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#endif // SOC_GPIO_FLEX_GLITCH_FILTER_NUM > 0
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