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fix(uart): fix uart sw flow ctrl XOFF char write to wrong reg on ESP32C6

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Add software flow control test case

Introduced in e6ef4d1791

Closes https://github.com/espressif/esp-idf/issues/18779
This commit is contained in:
Song Ruo Jing
2026-07-10 11:37:14 +08:00
parent 28b43f2e8d
commit dedb603390
6 changed files with 260 additions and 8 deletions
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components/hal/esp32c6/include/hal/uart_ll.h
+1 -1
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@@ -820,7 +820,7 @@ FORCE_INLINE_ATTR void uart_ll_set_sw_flow_ctrl(uart_dev_t *hw, uart_sw_flowctrl
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->swfc_conf1, xon_threshold, (flow_ctrl->xon_thrd) << UART_LL_REG_FIELD_BIT_SHIFT(hw));
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->swfc_conf1, xoff_threshold, (flow_ctrl->xoff_thrd) << UART_LL_REG_FIELD_BIT_SHIFT(hw));
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->swfc_conf0_sync, xon_character, flow_ctrl->xon_char);
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->swfc_conf0_sync, xon_character, flow_ctrl->xoff_char);
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->swfc_conf0_sync, xoff_character, flow_ctrl->xoff_char);
} else {
hw->swfc_conf0_sync.sw_flow_con_en = 0;
hw->swfc_conf0_sync.xonoff_del = 0;