1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* *****************************************************************************
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Created: 12/19/09 05:15:24 EST
* Copyright (c) 2009 Perry L. Hung. All rights reserved.
*
* ****************************************************************************/
/**
* @file HardwareSerial.cpp
*
* @brief Wiring-like serial api
*/
#include "wiring.h"
#include "HardwareSerial.h"
#include "usart.h"
#include "gpio.h"
#include "timers.h"
#define USART1_TX_PORT GPIOA_BASE
#define USART1_TX_PIN 9
#define USART1_RX_PORT GPIOA_BASE
#define USART1_RX_PIN 10
#define USART2_TX_PORT GPIOA_BASE
#define USART2_TX_PIN 2
#define USART2_RX_PORT GPIOA_BASE
#define USART2_RX_PIN 3
#define USART3_TX_PORT GPIOB_BASE
#define USART3_TX_PIN 10
#define USART3_RX_PORT GPIOB_BASE
#define USART3_RX_PIN 11
HardwareSerial::HardwareSerial(uint8_t usartNum) {
ASSERT(usartNum == 1 ||
usartNum == 2 ||
usartNum == 3);
this->usartNum = usartNum;
}
uint8_t HardwareSerial::read(void) {
return usart_getc(usartNum);
}
uint32 HardwareSerial::available(void) {
return usart_data_available(usartNum);
}
void HardwareSerial::write(unsigned char ch) {
usart_putc(usartNum, ch);
}
void HardwareSerial::begin(uint32_t baud) {
ASSERT(!(baud > USART_MAX_BAUD));
/* Set appropriate pin modes */
switch (usartNum) {
case 1:
gpio_set_mode(USART1_TX_PORT, USART1_TX_PIN, GPIO_MODE_AF_OUTPUT_PP);
gpio_set_mode(USART1_RX_PORT, USART1_RX_PIN, GPIO_MODE_INPUT_FLOATING);
/* Turn off any pwm */
timers_disable_channel(1, 2);
break;
case 2:
gpio_set_mode(USART2_TX_PORT, USART2_TX_PIN, GPIO_MODE_AF_OUTPUT_PP);
gpio_set_mode(USART2_RX_PORT, USART2_RX_PIN, GPIO_MODE_INPUT_FLOATING);
/* Turn off any pwm */
timers_disable_channel(2, 3);
break;
case 3:
gpio_set_mode(USART3_TX_PORT, USART3_TX_PIN, GPIO_MODE_AF_OUTPUT_PP);
gpio_set_mode(USART3_RX_PORT, USART3_RX_PIN, GPIO_MODE_INPUT_FLOATING);
break;
default:
ASSERT(0);
}
usart_init(usartNum, baud);
}
HardwareSerial Serial1(1);
HardwareSerial Serial2(2);
HardwareSerial Serial3(3);
|
