diff options
| author | Z8MAN8 <[email protected]> | 2024-08-23 22:23:42 +0800 |
|---|---|---|
| committer | Meco Man <[email protected]> | 2024-09-03 20:50:50 -0400 |
| commit | cea7670e7f19ee2fdf6b3fd3273024e38d97c062 (patch) | |
| tree | ce88c74056b38b41506458eeb4743c65dec93840 | |
| parent | 3174fcd77b8826ebd057c489e8b843736c1c60eb (diff) | |
bsp: cvitek: fix cvitek uart driver can not repeat configure
After first called from uart open, the dw8250_uart_configure
API cannot be called again. Otherwise, this will mess up the
device, and uart will not act properly to interrupt again.
Analysis: Configure uart device will close recive interrupte,
causing uart device to malfunction.
Solution: After configure uart device, enable the device's
recive interrupte.
Signed-off-by: Shicheng Chu <[email protected]>
Reviewed-by: Chen Wang <[email protected]>
| -rw-r--r-- | bsp/cvitek/drivers/drv_uart.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/bsp/cvitek/drivers/drv_uart.c b/bsp/cvitek/drivers/drv_uart.c index d540117b3f..fb896b1635 100644 --- a/bsp/cvitek/drivers/drv_uart.c +++ b/bsp/cvitek/drivers/drv_uart.c @@ -115,6 +115,7 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se rt_base_t base; struct hw_uart_device *uart; int clock_divisor; + int last_ier_state; RT_ASSERT(serial != RT_NULL); uart = (struct hw_uart_device *)serial->parent.user_data; @@ -122,6 +123,7 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se while (!(dw8250_read32(base, UART_LSR) & UART_LSR_TEMT)); + last_ier_state = dw8250_read32(base, UART_IER); dw8250_write32(base, UART_IER, 0); dw8250_write32(base, UART_MCR, UART_MCRVAL); dw8250_write32(base, UART_FCR, UART_FCR_DEFVAL); @@ -132,6 +134,8 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se clock_divisor = DIV_ROUND_CLOSEST(UART_INPUT_CLK, 16 * serial->config.baud_rate); dw8250_uart_setbrg(base, clock_divisor); + dw8250_write32(base, UART_IER, last_ier_state); + return RT_EOK; } |