1 /*
2 * Copyright (c) 2020 Nanjing Xiaoxiongpai Intelligent Technology Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <stdio.h>
17 #include <string.h>
18 #include <unistd.h>
19
20 #include "cmsis_os2.h"
21 #include "iot_errno.h"
22 #include "iot_uart.h"
23 #include "ohos_init.h"
24
25 #define UART_TASK_STACK_SIZE (1024 * 8)
26 #define UART_TASK_PRIO 25
27 #define UART_BUFF_SIZE 1000
28 #define WIFI_IOT_UART_IDX_1 1
29 #define TASK_DELAY_1S 1000000
30
31 static const char *data = "Hello, BearPi!\r\n";
32
33 /**
34 * @brief uart task send data through uart1 and receive data through uart1
35 *
36 */
UartTask(void)37 static void UartTask(void)
38 {
39 uint8_t uart_buff[UART_BUFF_SIZE] = { 0 };
40 uint8_t *uart_buff_ptr = uart_buff;
41 uint8_t ret;
42
43 IotUartAttribute uart_attr = {
44
45 // baud_rate: 9600
46 .baudRate = 9600,
47
48 // data_bits: 8bits
49 .dataBits = 8,
50 .stopBits = 1,
51 .parity = 0,
52 };
53
54 // Initialize uart driver
55 ret = IoTUartInit(WIFI_IOT_UART_IDX_1, &uart_attr);
56 if (ret != IOT_SUCCESS) {
57 printf("Failed to init uart! Err code = %d\n", ret);
58 return;
59 }
60
61 while (1) {
62 printf("=======================================\r\n");
63 printf("*************UART_example**************\r\n");
64 printf("=======================================\r\n");
65
66 // send data through uart1
67 IoTUartWrite(WIFI_IOT_UART_IDX_1, (unsigned char *)data, strlen(data));
68
69 // receive data through uart1
70 IoTUartRead(WIFI_IOT_UART_IDX_1, uart_buff_ptr, UART_BUFF_SIZE);
71
72 printf("Uart1 read data:%s\n", uart_buff_ptr);
73 usleep(TASK_DELAY_1S);
74 }
75 }
76
77 /**
78 * @brief Main Entry of the UART Example
79 *
80 */
UartExampleEntry(void)81 static void UartExampleEntry(void)
82 {
83 osThreadAttr_t attr;
84
85 attr.name = "UartTask";
86 attr.attr_bits = 0U;
87 attr.cb_mem = NULL;
88 attr.cb_size = 0U;
89 attr.stack_mem = NULL;
90 attr.stack_size = UART_TASK_STACK_SIZE;
91 attr.priority = UART_TASK_PRIO;
92
93 if (osThreadNew((osThreadFunc_t)UartTask, NULL, &attr) == NULL) {
94 printf("Failed to create UartTask!\n");
95 }
96 }
97
98 APP_FEATURE_INIT(UartExampleEntry);