RT-Thread / RT-Thread/rt-thread
[Bug] [HPM] [uart_v2] 驱动判断 TX 中断时混用了“中断 ID”和“中断使能掩码”
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- C
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Description
RT-Thread Version
master
Affected area
Board Support Package (BSP)
Hardware/BSP vendor
HPMicro
Architecture
RISC-V
Board and hardware details
hpm6364
Develop Toolchain
GCC
Describe the bug
错误代码位于 libraries/drivers/drv_uart_v2.c:763：
if ((irq_id & uart_intr_tx_slot_avail) &&
(stat & uart_stat_tx_slot_avail)) {
irq_id 应与 uart_intr_id_tx_slot_avail 比较：
if ((irq_id == uart_intr_id_tx_slot_avail) &&
(stat & uart_stat_tx_slot_avail)) {
当前 UART6 配置为 TX_BUFSIZE=0，RT-Thread 会采用轮询发送，不创建 serial_tx。当 UART 接收线出现状态中断时：
- uart_intr_id_rx_line_stat = 0x6
- uart_intr_tx_slot_avail 掩码值包含 0x2
- 0x6 & 0x2 != 0
于是 RX line status 被误判为 TX 中断，随后在 libraries/drivers/drv_uart_v2.c:767 对空的 serial_tx 触发断言。
Other additional context
@helloeagleyang 是佬在负责这块吗
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Research direction
Inspect libraries/drivers/drv_uart_v2.c around lines 763-767 and trace how UART interrupt IDs and status masks are handled for hpm6364. Reproduce the UART6 configuration with TX_BUFSIZE=0; done when an RX line-status interrupt is no longer treated as a TX interrupt or causes an assertion on an absent serial_tx.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- embedded-iot, operating-systems
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Quiet
- Clarity
- Clearly specified
- Newbie friendliness
- 72/100