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fix(twai): twai legacy driver fixed zero dlc transmit

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Closes https://github.com/espressif/esp-idf/issues/17467
This commit is contained in:
wanckl
2025-08-21 16:13:29 +08:00
parent 26c3b0b83c
commit e5222e01ec
4 changed files with 78 additions and 12 deletions
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components/driver/test_apps/legacy_twai/main/test_twai_loop_back.c
+12 -10
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -68,19 +68,21 @@ TEST_CASE("twai_mode_std_no_ack_25kbps", "[twai-loop-back]")
twai_message_t tx_msg = {
.identifier = 0x123,
.data_length_code = 8,
.data = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88},
.self = true, // Transmitted message will also received by the same node
};
printf("transmit message\r\n");
TEST_ESP_OK(twai_transmit(&tx_msg, pdMS_TO_TICKS(1000)));
for (int len = 0; len <= 8; len++) {
tx_msg.data_length_code = len;
printf("TX id %lx len %d\r\n", tx_msg.identifier, tx_msg.data_length_code);
TEST_ESP_OK(twai_transmit(&tx_msg, pdMS_TO_TICKS(1000)));
printf("receive message\r\n");
twai_message_t rx_msg;
TEST_ESP_OK(twai_receive(&rx_msg, pdMS_TO_TICKS(1000)));
TEST_ASSERT_TRUE(rx_msg.data_length_code == 8);
for (int i = 0; i < 8; i++) {
TEST_ASSERT_EQUAL(tx_msg.data[i], rx_msg.data[i]);
twai_message_t rx_msg = {};
TEST_ESP_OK(twai_receive(&rx_msg, pdMS_TO_TICKS(1000)));
printf("RX id %lx len %d\r\n", rx_msg.identifier, rx_msg.data_length_code);
TEST_ASSERT_EQUAL(rx_msg.data_length_code, tx_msg.data_length_code);
for (int i = 0; i < rx_msg.data_length_code; i++) {
TEST_ASSERT_EQUAL(tx_msg.data[i], rx_msg.data[i]);
}
}
TEST_ESP_OK(twai_stop());