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feat(rmt_tx): allow to switch gpio in tx channal

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This commit is contained in:
Chen Jichang
2025-04-09 12:03:22 +08:00
parent 486dfdeddb
commit d8058158ea
5 changed files with 140 additions and 19 deletions
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76
components/driver/test_apps/rmt/main/test_rmt_tx.c
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -10,6 +10,7 @@
#include "freertos/task.h"
#include "unity.h"
#include "driver/rmt_tx.h"
#include "driver/gpio.h"
#include "esp_timer.h"
#include "soc/soc_caps.h"
#include "test_util_rmt_encoders.h"
@@ -654,3 +655,76 @@ TEST_CASE("rmt multiple channels transaction", "[rmt]")
test_rmt_multi_channels_trans(1024, SOC_RMT_MEM_WORDS_PER_CHANNEL, true, false);
#endif
}
TEST_CASE("rmt tx gpio switch test", "[rmt]")
{
// use the GPIO to check the IO level after transaction
gpio_config_t io_conf = {
.pin_bit_mask = BIT(TEST_RMT_GPIO_NUM_B),
.mode = GPIO_MODE_INPUT,
.pull_up_en = GPIO_PULLUP_DISABLE,
.pull_down_en = GPIO_PULLDOWN_ENABLE,
.intr_type = GPIO_INTR_DISABLE,
};
TEST_ESP_OK(gpio_config(&io_conf));
rmt_tx_channel_config_t tx_channel_cfg = {
.mem_block_symbols = SOC_RMT_MEM_WORDS_PER_CHANNEL,
.clk_src = RMT_CLK_SRC_DEFAULT,
.resolution_hz = 1000000, // 1MHz, 1 tick = 1us
.trans_queue_depth = 4,
.gpio_num = TEST_RMT_GPIO_NUM_A,
.intr_priority = 3,
.flags.io_loop_back = true, // use the GPIO to check the IO level after transaction
};
printf("install tx channel\r\n");
rmt_channel_handle_t tx_channel = NULL;
TEST_ESP_OK(rmt_new_tx_channel(&tx_channel_cfg, &tx_channel));
printf("install bytes encoder\r\n");
rmt_encoder_handle_t copy_encoder = NULL;
rmt_copy_encoder_config_t copy_encoder_config = {};
TEST_ESP_OK(rmt_new_copy_encoder(&copy_encoder_config, &copy_encoder));
printf("enable tx channel\r\n");
TEST_ESP_OK(rmt_enable(tx_channel));
printf("start transaction\r\n");
rmt_transmit_config_t transmit_config = {
.loop_count = 0, // no loop
.flags.eot_level = 1,
};
rmt_symbol_word_t rmt_symbol = {
.level0 = 0,
.duration0 = 50,
.level1 = 1,
.duration1 = 100,
};
// check the IO level after transaction
TEST_ASSERT_EQUAL(0, gpio_get_level(TEST_RMT_GPIO_NUM_A));
TEST_ESP_OK(rmt_transmit(tx_channel, copy_encoder, &rmt_symbol, sizeof(rmt_symbol), &transmit_config));
TEST_ESP_OK(rmt_tx_wait_all_done(tx_channel, -1));
TEST_ASSERT_EQUAL(1, gpio_get_level(TEST_RMT_GPIO_NUM_A));
// switch the GPIO
TEST_ESP_ERR(rmt_tx_switch_gpio(tx_channel, TEST_RMT_GPIO_NUM_B, false), ESP_ERR_INVALID_STATE);
TEST_ESP_OK(rmt_disable(tx_channel));
TEST_ESP_OK(rmt_tx_switch_gpio(tx_channel, TEST_RMT_GPIO_NUM_B, false));
TEST_ESP_OK(rmt_enable(tx_channel));
// check the IO level after transaction
// note: the IO level is 1 before the transaction, because the GPIO level will be inherited from the eot_level
TEST_ASSERT_EQUAL(1, gpio_get_level(TEST_RMT_GPIO_NUM_B));
transmit_config.flags.eot_level = 0;
TEST_ESP_OK(rmt_transmit(tx_channel, copy_encoder, &rmt_symbol, sizeof(rmt_symbol), &transmit_config));
TEST_ESP_OK(rmt_tx_wait_all_done(tx_channel, -1));
TEST_ASSERT_EQUAL(0, gpio_get_level(TEST_RMT_GPIO_NUM_B));
printf("disable tx channel\r\n");
TEST_ESP_OK(rmt_disable(tx_channel));
printf("remove tx channel and encoder\r\n");
TEST_ESP_OK(rmt_del_channel(tx_channel));
TEST_ESP_OK(rmt_del_encoder(copy_encoder));
TEST_ESP_OK(gpio_reset_pin(TEST_RMT_GPIO_NUM_A));
TEST_ESP_OK(gpio_reset_pin(TEST_RMT_GPIO_NUM_B));
}