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fix(uart): fix uart_write_bytes gets stuck internally if ring buffer is full

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Introduced in c062cd9a95
This commit is contained in:
Song Ruo Jing
2025-11-27 11:08:48 +08:00
parent 1f7e3ac279
commit de87969611
2 changed files with 8 additions and 6 deletions
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components/esp_driver_uart/test_apps/uart/main/test_uart.c
+2 -2
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@@ -440,7 +440,7 @@ TEST_CASE("uart tx ring buffer free space test", "[uart]")
uart_port_t uart_num = port_param.port_num;
uint8_t *rd_data = (uint8_t *)malloc(1024);
TEST_ASSERT_NOT_NULL(rd_data);
uint8_t *wr_data = (uint8_t *)malloc(256);
uint8_t *wr_data = (uint8_t *)malloc(2048);
TEST_ASSERT_NOT_NULL(wr_data);
uart_config_t uart_config = {
.baud_rate = 2000000,
@@ -475,7 +475,7 @@ TEST_CASE("uart tx ring buffer free space test", "[uart]")
TEST_ASSERT_EQUAL_INT(0, tx_buffer_free_space); // tx buffer is full
// Let CTS be low, so that transmission is unblocked
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, uart_periph_signal[uart_num].pins[SOC_UART_PERIPH_SIGNAL_CTS].signal, true);
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, uart_periph_signal[uart_num].pins[SOC_UART_PERIPH_SIGNAL_CTS].signal, false);
uart_wait_tx_done(uart_num, portMAX_DELAY);
uart_get_tx_buffer_free_size(uart_num, &tx_buffer_free_space);
TEST_ASSERT_EQUAL_INT(2020, tx_buffer_free_space); // tx buffer is back to full capacity