1 /*-----------------------------------------------------------------------------
2 * Name: stdout_USART.c
3 * Purpose: STDOUT USART Template
4 * Rev.: 1.0.0
5 *-----------------------------------------------------------------------------*/
6
7 /* Copyright (c) 2013 - 2023 ARM LIMITED
8
9 All rights reserved.
10 Redistribution and use in source and binary forms, with or without
11 modification, are permitted provided that the following conditions are met:
12 - Redistributions of source code must retain the above copyright
13 notice, this list of conditions and the following disclaimer.
14 - Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
17 - Neither the name of ARM nor the names of its contributors may be used
18 to endorse or promote products derived from this software without
19 specific prior written permission.
20 *
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
25 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 POSSIBILITY OF SUCH DAMAGE.
32 ---------------------------------------------------------------------------*/
33
34 #include "Driver_USART.h"
35
36 //-------- <<< Use Configuration Wizard in Context Menu >>> --------------------
37
38 // <h>STDOUT USART Interface
39
40 // <o>Connect to hardware via Driver_USART# <0-255>
41 // <i>Select driver control block for USART interface
42 #define USART_DRV_NUM 0
43
44 // <o>Baudrate
45 #define USART_BAUDRATE 115200
46
47 // </h>
48
49
50 #define _USART_Driver_(n) Driver_USART##n
51 #define USART_Driver_(n) _USART_Driver_(n)
52
53 extern ARM_DRIVER_USART USART_Driver_(USART_DRV_NUM);
54 #define ptrUSART (&USART_Driver_(USART_DRV_NUM))
55
56
57 /**
58 Initialize stdout
59
60 \return 0 on success, or -1 on error.
61 */
stdout_init(void)62 int stdout_init (void) {
63 int32_t status;
64
65 status = ptrUSART->Initialize(NULL);
66 if (status != ARM_DRIVER_OK) return (-1);
67
68 status = ptrUSART->PowerControl(ARM_POWER_FULL);
69 if (status != ARM_DRIVER_OK) return (-1);
70
71 status = ptrUSART->Control(ARM_USART_MODE_ASYNCHRONOUS |
72 ARM_USART_DATA_BITS_8 |
73 ARM_USART_PARITY_NONE |
74 ARM_USART_STOP_BITS_1 |
75 ARM_USART_FLOW_CONTROL_NONE,
76 USART_BAUDRATE);
77 if (status != ARM_DRIVER_OK) return (-1);
78
79 status = ptrUSART->Control(ARM_USART_CONTROL_TX, 1);
80 if (status != ARM_DRIVER_OK) return (-1);
81
82 return (0);
83 }
84
85
86 /**
87 Put a character to the stdout
88
89 \param[in] ch Character to output
90 \return The character written, or -1 on write error.
91 */
stdout_putchar(int ch)92 int stdout_putchar (int ch) {
93 uint8_t buf[1];
94
95 buf[0] = ch;
96 if (ptrUSART->Send(buf, 1) != ARM_DRIVER_OK) {
97 return (-1);
98 }
99 while (ptrUSART->GetTxCount() != 1);
100 return (ch);
101 }
102
