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feat(uart): add collision detection test cases for RS485

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Related https://github.com/espressif/esp-idf/issues/16101
This commit is contained in:
Song Ruo Jing
2026-07-09 19:24:07 +08:00
parent 65f2cb7c05
commit b7cfe6c9a5
5 changed files with 202 additions and 45 deletions
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components/esp_driver_uart/test_apps/uart/main/test_uart.c
+9 -7
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@@ -23,6 +23,7 @@
#include "soc/clk_tree_defs.h"
#include "test_common.h"
#include "esp_timer.h"
#include "sdkconfig.h"
#define BUF_SIZE (100)
#define UART_BAUD_11520 (11520)
@@ -861,7 +862,8 @@ TEST_CASE("uart auto baud rate detection", "[uart]")
TEST_ASSERT(port_select(&port_param));
// This is indeed a standalone feature, no need to specify the uart port, call port_select() to be compatible with pytest
// And this test case no need to be tested twice on HP/LP uart ports both exist targets (also, LP UART does not support auto baud rate detection functionality)
if (port_param.port_num < SOC_UART_HP_NUM) {
uart_port_t uart_num = port_param.port_num;
if (uart_num < SOC_UART_HP_NUM) {
TaskHandle_t console_write_task = NULL;
xTaskCreate(uart_console_write_task, "uart_console_write_task", 2048, NULL, 5, &console_write_task);
vTaskDelay(20);
@@ -876,9 +878,9 @@ TEST_CASE("uart auto baud rate detection", "[uart]")
uart_bitrate_res_t res = {};
uart_get_baudrate(CONFIG_CONSOLE_UART_NUM, &actual_baudrate);
TEST_ESP_OK(uart_detect_bitrate_start(UART_NUM_1, &conf)); // acquire a new uart port
TEST_ESP_OK(uart_detect_bitrate_start(uart_num, &conf)); // acquire a new uart port
vTaskDelay(pdMS_TO_TICKS(500));
TEST_ESP_OK(uart_detect_bitrate_stop(UART_NUM_1, false, &res)); // no releasing
TEST_ESP_OK(uart_detect_bitrate_stop(uart_num, false, &res)); // no releasing
detected_baudrate = res.clk_freq_hz * 2 / res.pos_period; // assume the wave has a slow falling slew rate
TEST_ASSERT_INT32_WITHIN(actual_baudrate * 0.03, actual_baudrate, detected_baudrate); // allow 3% error
@@ -886,9 +888,9 @@ TEST_CASE("uart auto baud rate detection", "[uart]")
uart_set_baudrate(CONFIG_CONSOLE_UART_NUM, 38400);
uart_get_baudrate(CONFIG_CONSOLE_UART_NUM, &actual_baudrate);
TEST_ESP_OK(uart_detect_bitrate_start(UART_NUM_1, NULL)); // use the previously acquired uart port
TEST_ESP_OK(uart_detect_bitrate_start(uart_num, NULL)); // use the previously acquired uart port
vTaskDelay(pdMS_TO_TICKS(500));
TEST_ESP_OK(uart_detect_bitrate_stop(UART_NUM_1, true, &res)); // release the uart port
TEST_ESP_OK(uart_detect_bitrate_stop(uart_num, true, &res)); // release the uart port
detected_baudrate = res.clk_freq_hz * 2 / res.pos_period;
TEST_ASSERT_INT32_WITHIN(actual_baudrate * 0.03, actual_baudrate, detected_baudrate);
@@ -896,9 +898,9 @@ TEST_CASE("uart auto baud rate detection", "[uart]")
uart_set_baudrate(CONFIG_CONSOLE_UART_NUM, CONFIG_CONSOLE_UART_BAUDRATE);
uart_get_baudrate(CONFIG_CONSOLE_UART_NUM, &actual_baudrate);
TEST_ESP_OK(uart_detect_bitrate_start(UART_NUM_1, &conf)); // acquire a new uart port again
TEST_ESP_OK(uart_detect_bitrate_start(uart_num, &conf)); // acquire a new uart port again
vTaskDelay(pdMS_TO_TICKS(500));
TEST_ESP_OK(uart_detect_bitrate_stop(UART_NUM_1, true, &res)); // release it
TEST_ESP_OK(uart_detect_bitrate_stop(uart_num, true, &res)); // release it
detected_baudrate = res.clk_freq_hz * 2 / res.pos_period;
TEST_ASSERT_INT32_WITHIN(actual_baudrate * 0.03, actual_baudrate, detected_baudrate);