由 黎明将至! 贡献，Ai-Thinker 进行整理
Ai-WB2-32S uart rx超时中断（接收空闲中断）
前言
本期文档介绍一下uart接收中断的使用，在Linux Ubuntu下烧录的过程可以点击链接查看 芯片参考手册uart部分链接**测试完记着要把bl_uart.c和bl_uart.h文件还原，要不然别的demo就无法编译了！
一、具体流程
第1步 进入目录~/Ai-Thinker-WB2/applications/peripherals/uart/uart
cd ~/Ai-Thinker-WB2/applications/peripherals/uart/uart
第2步 输入ls查看目录下的文件
ls
第3步 编写main.c文件
gedit main.c
将代码改为下面代码
📜 点击展开完整代码
c
/*
* @Author: [email]xuhongv@yeah.net[/email]
* @Date: 2022-10-03 15:02:19
* @LastEditors: [email]xuhongv@yeah.net[/email] [email]xuhongv@yeah.net[/email]
* @LastEditTime: 2022-10-20 17:42:45
* @FilePath: \bl_iot_sdk_for_aithinker\applications\get-started\helloworld\helloworld\main.c
* @Description: Uart
*/
#
include
<stdio.h>
#
include
<string.h>
#
include
<FreeRTOS.h>
#
include
<task.h>
#
include
<blog.h>
#
include
"bl_sys.h"
#
include
<stdio.h>
#
include
<cli.h>
#
include
<hosal_uart.h>
#
include
<blog.h>
#
include
"bl_uart.h"
//create a serial port structure variable.
hosal_uart_dev_t
uart_dev_log = {
.config = {
.uart_id =
1
,
.tx_pin =
16
,
// TXD GPIO
.rx_pin =
7
,
// RXD GPIO
.cts_pin =
255
,
.rts_pin =
255
,
.baud_rate =
115200
,
.data_width = HOSAL_DATA_WIDTH_8BIT,
.parity = HOSAL_NO_PARITY,
.stop_bits = HOSAL_STOP_BITS_1,
.mode = HOSAL_UART_MODE_INT,
},
};
//functions used to create tasks.
void
TaskUart
(
void
*param)
{
/* Uart init device */
hosal_uart_init(&uart_dev_log);
blog_info(
"Uart Demo Start"
);
while
(
1
)
{
// hosal_uart_send(&uart_dev_log, "test\r\n", 6); //test whether to exit the interrupt.
if
(my_uart_data.uart_rx_flag >
0
)
//if data is received, execute the following program.
{
my_uart_data.uart_rx_flag =
0
;
//clear receiving flag.
memset
(my_uart_data.uart_tx_data,
0
,
sizeof
(my_uart_data.uart_tx_data));
//process the received data and write it to the send buffer.
sprintf
((
char
*)(my_uart_data.uart_tx_data),
"receive: %s\r\n"
, my_uart_data.uart_rx_data);
//send processed data
hosal_uart_send(&uart_dev_log, my_uart_data.uart_tx_data,
sizeof
(my_uart_data.uart_tx_data));
memset
(my_uart_data.uart_rx_data,
0
,
sizeof
(my_uart_data.uart_rx_data));
}
//delay of 500ms.
vTaskDelay(
500
);
}
}
/**
* @brief main
*
*/
void
main
(
void
)
{
//create task
xTaskCreate(TaskUart,
"TaskUart"
,
1024
,
NULL
,
15
,
NULL
);
}第4步 进入~/Ai-Thinker-WB2/components/platform/hosal/bl602_hal目录
cd ~/Ai-Thinker-WB2/components/platform/hosal/bl602_hal/
第5步 修改bl_uart.c文件
gedit bl_uart.c
📜 点击展开完整代码
c
#
include
<hosal_uart.h>
📜 点击展开完整代码
c
extern
hosal_uart_dev_t
uart_dev_log;修改中断服务函数
📜 点击展开完整代码
c
void
UART1_IRQHandler
(
void
)
{
cb_uart_notify_t
cb;
void
*arg;
uint32_t
tmpVal =
0
;
uint32_t
maskVal =
0
;
uint32_t
UARTx = uartAddr[
1
];
tmpVal = BL_RD_REG(UARTx,UART_INT_STS);
maskVal = BL_RD_REG(UARTx,UART_INT_MASK);
if
(BL_IS_REG_BIT_SET(tmpVal,UART_URX_RTO_INT) && !BL_IS_REG_BIT_SET(maskVal,UART_CR_URX_RTO_MASK)){
BL_WR_REG(UARTx,UART_INT_CLEAR,
0x12
);
// *((uint32_t *)0x4000A128) = 0x12;
/*Receive Data ready*/
cb = g_uart_notify_arg[
1
].rx_cb;
arg = g_uart_notify_arg[
1
].rx_cb_arg;
if
(cb) {
/*notify up layer*/
cb(arg);
my_uart_data.uart_rx_flag = hosal_uart_receive(&uart_dev_log,
my_uart_data.uart_rx_data,
sizeof
(my_uart_data.uart_rx_data));
}
}
}第6步 修改bl_uart.c文件
gedit bl_uart.h
📜 点击展开完整代码
c
#
define
DATALINE 64
typedef
struct
{
uint8_t
uart_rx_data[DATALINE];
uint8_t
uart_rx_flag;
uint8_t
uart_tx_data[DATALINE];
}MY_UART_DATA;
MY_UART_DATA my_uart_data;第7步 编译
进入目录~/Ai-Thinker-WB2/applications/peripherals/uart cd ~/Ai-Thinker-WB2/applications/peripherals/uart
编译 make -j8（博主的电脑内核是8核的，因此就是用了8核编译，这里的内核数最大写自己电脑的内核数）
第8步 烧录到模组（此时需要模组连接到虚拟机，具体过程可以点击此链接）
执行 make flash p=/dev/ttyUSB0 b=115200
根据提示按下模组的复位键
第9步 通过调试助手向模组发送数据（这里要将模组连接到主机，具体过程可以点击次连接进行参考）
将模组连接到主机之后，打开串口调试助手，选择对应的串口、波特率等，打开串口，按下复位键
二、使用注意
清除接收中断标志位，既要清除urx_end_int，也要清除urx_rto_int；否则就会无法出中断；
原链接：<https://blog.csdn.net/qq_54193285/article/details/135933164?spm=1001.2014.3001.5501>
**测试完记着要把bl_uart.c和bl_uart.h文件还原，要不然别的demo就无法编译了！