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fix(ledc): fix potential null dereference issue & add test case

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This commit is contained in:
Chen Chen
2025-12-25 15:02:16 +08:00
parent 851ffae394
commit 698cbe884b
6 changed files with 66 additions and 20 deletions
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components/esp_driver_ledc/test_apps/ledc/main/test_ledc.c
+39
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@@ -258,6 +258,45 @@ TEST_CASE("LEDC fade with step", "[ledc]")
ledc_fade_func_uninstall();
}
#if SOC_LEDC_SUPPORT_HS_MODE
TEST_CASE("LEDC fade install with low speed mode only", "[ledc]")
{
// This test verifies that ledc_fade_func_install works correctly when only
// LEDC_LOW_SPEED_MODE is initialized, without initializing LEDC_HIGH_SPEED_MODE.
// This tests the fix for NULL pointer dereference issue.
// Only initialize low speed mode, do NOT initialize high speed mode
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.speed_mode = LEDC_LOW_SPEED_MODE;
ledc_ch_config.duty = 0;
ledc_ch_config.channel = LEDC_CHANNEL_0;
ledc_ch_config.timer_sel = LEDC_TIMER_0;
ledc_timer_config_t ledc_time_config = create_default_timer_config();
ledc_time_config.speed_mode = LEDC_LOW_SPEED_MODE;
ledc_time_config.timer_num = LEDC_TIMER_0;
// Initialize only low speed mode
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(5 / portTICK_PERIOD_MS);
TEST_ESP_OK(ledc_fade_func_install(0));
// Verify that fade functionality works correctly with low speed mode
TEST_ESP_OK(ledc_set_fade_with_time(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(4000, ledc_get_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0));
// Test fade down
TEST_ESP_OK(ledc_set_fade_with_time(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 0, 200));
TEST_ESP_OK(ledc_fade_start(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(0, ledc_get_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0));
// Cleanup
ledc_fade_func_uninstall();
}
#endif // SOC_LEDC_SUPPORT_HS_MODE
TEST_CASE("LEDC fast switching duty with fade_wait_done", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;