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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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.
ChibiOS/RT 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/>.
*/
#include "ch.h"
#include "hal.h"
/*
* Internal loopback mode, 500KBaud, automatic wakeup, automatic recover
* from abort mode.
* See section 22.7.7 on the STM32 reference manual.
*/
static const CANConfig cancfg = {
CAN_MCR_ABOM | CAN_MCR_AWUM | CAN_MCR_TXFP,
CAN_BTR_LBKM | CAN_BTR_SJW(0) | CAN_BTR_TS2(1) |
CAN_BTR_TS1(8) | CAN_BTR_BRP(6),
0,
NULL
};
/*
* Receiver thread.
*/
static WORKING_AREA(can_rx_wa, 256);
static msg_t can_rx(void *p) {
EventListener el;
CANRxFrame rxmsg;
(void)p;
chRegSetThreadName("receiver");
chEvtRegister(&CAND1.rxfull_event, &el, 0);
while(!chThdShouldTerminate()) {
if (chEvtWaitAnyTimeout(ALL_EVENTS, MS2ST(100)) == 0)
continue;
while (canReceive(&CAND1, &rxmsg, TIME_IMMEDIATE) == RDY_OK) {
/* Process message.*/
palTogglePad(IOPORT3, GPIOC_LED);
}
}
chEvtUnregister(&CAND1.rxfull_event, &el);
return 0;
}
/*
* Transmitter thread.
*/
static WORKING_AREA(can_tx_wa, 256);
static msg_t can_tx(void * p) {
CANTxFrame txmsg;
(void)p;
chRegSetThreadName("transmitter");
txmsg.IDE = CAN_IDE_EXT;
txmsg.EID = 0x01234567;
txmsg.RTR = CAN_RTR_DATA;
txmsg.DLC = 8;
txmsg.data32[0] = 0x55AA55AA;
txmsg.data32[1] = 0x00FF00FF;
while (!chThdShouldTerminate()) {
canTransmit(&CAND1, &txmsg, MS2ST(100));
chThdSleepMilliseconds(500);
}
return 0;
}
/*
* Application entry point.
*/
int main(void) {
/*
* System initializations.
* - HAL initialization, this also initializes the configured device drivers
* and performs the board-specific initializations.
* - Kernel initialization, the main() function becomes a thread and the
* RTOS is active.
*/
halInit();
chSysInit();
/*
* Activates the CAN driver 1.
*/
canStart(&CAND1, &cancfg);
/*
* Starting the transmitter and receiver threads.
*/
chThdCreateStatic(can_rx_wa, sizeof(can_rx_wa), NORMALPRIO + 7, can_rx, NULL);
chThdCreateStatic(can_tx_wa, sizeof(can_tx_wa), NORMALPRIO + 7, can_tx, NULL);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (TRUE) {
chThdSleepMilliseconds(500);
}
return 0;
}
|
