1 /*
2 * Copyright (c) 2020-2021 Huawei Device 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 "uart.h"
17 #include "arm_uart_drv.h"
18 #include "stdio.h"
19 #include "los_config.h"
20 #include "los_reg.h"
21 #include "los_interrupt.h"
22 #include "los_event.h"
23
24 #ifdef __cplusplus
25 #if __cplusplus
26 extern "C" {
27 #endif
28 #endif
29
30 static const struct arm_uart_dev_cfg_t g_uartCfg = {UART0_BASE, 115200};
31 static struct arm_uart_dev_data_t g_uartData = {0};
32 struct arm_uart_dev_t g_uartDev;
33
UartGetc(VOID)34 INT32 UartGetc(VOID)
35 {
36 UINT8 c;
37 if (arm_uart_read(&g_uartDev, &c) == ARM_UART_ERR_NOT_READY) {
38 return 0;
39 }
40
41 return c;
42 }
43
UartPutc(INT32 c,VOID * file)44 INT32 UartPutc(INT32 c, VOID *file)
45 {
46 return arm_uart_write(&g_uartDev, (UINT8)c);
47 }
48
UartReceiveHandler(VOID)49 VOID UartReceiveHandler(VOID)
50 {
51 if (arm_uart_get_interrupt_status(&g_uartDev) == ARM_UART_IRQ_RX) {
52 (void)LOS_EventWrite(&g_shellInputEvent, 0x1);
53 (void)arm_uart_clear_interrupt(&g_uartDev, ARM_UART_IRQ_RX);
54 }
55 return;
56 }
57
UartInit(VOID)58 VOID UartInit(VOID)
59 {
60 g_uartDev.cfg = &g_uartCfg;
61 g_uartDev.data = &g_uartData;
62 (void)arm_uart_init(&g_uartDev, UART0_CLK_FREQ);
63 return;
64 }
65
Uart0RxIrqRegister(VOID)66 VOID Uart0RxIrqRegister(VOID)
67 {
68 (void)arm_uart_irq_rx_enable(&g_uartDev);
69 (void)LOS_HwiCreate(Uart0_Rx_IRQn, 0, 0, (HWI_PROC_FUNC)UartReceiveHandler, 0);
70 return;
71 }
72 #ifdef __cplusplus
73 #if __cplusplus
74 }
75 #endif /* __cplusplus */
76 #endif /* __cplusplus */
77