LPCOpen Platform
LPCOpen Platform for NXP LPC Microcontrollers
Main Page
Related Pages
Modules
Data Structures
Files
File List
Globals
All
Data Structures
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
blinky.c
Go to the documentation of this file.
1
/*
2
* @brief Blinky example using a timer and interrupt
3
*
4
* @note
5
* Copyright(C) NXP Semiconductors, 2012
6
* All rights reserved.
7
*
8
* @par
9
* Software that is described herein is for illustrative purposes only
10
* which provides customers with programming information regarding the
11
* LPC products. This software is supplied "AS IS" without any warranties of
12
* any kind, and NXP Semiconductors and its licensor disclaim any and
13
* all warranties, express or implied, including all implied warranties of
14
* merchantability, fitness for a particular purpose and non-infringement of
15
* intellectual property rights. NXP Semiconductors assumes no responsibility
16
* or liability for the use of the software, conveys no license or rights under any
17
* patent, copyright, mask work right, or any other intellectual property rights in
18
* or to any products. NXP Semiconductors reserves the right to make changes
19
* in the software without notification. NXP Semiconductors also makes no
20
* representation or warranty that such application will be suitable for the
21
* specified use without further testing or modification.
22
*
23
* @par
24
* Permission to use, copy, modify, and distribute this software and its
25
* documentation is hereby granted, under NXP Semiconductors' and its
26
* licensor's relevant copyrights in the software, without fee, provided that it
27
* is used in conjunction with NXP Semiconductors microcontrollers. This
28
* copyright, permission, and disclaimer notice must appear in all copies of
29
* this code.
30
*/
31
32
#include "board.h"
33
#include <stdio.h>
34
55
/*****************************************************************************
56
* Private types/enumerations/variables
57
****************************************************************************/
58
59
#define TICKRATE_HZ 10
60
61
/*****************************************************************************
62
* Public types/enumerations/variables
63
****************************************************************************/
64
65
/*****************************************************************************
66
* Private functions
67
****************************************************************************/
68
69
/*****************************************************************************
70
* Public functions
71
****************************************************************************/
72
77
void
TIMER1_IRQHandler
(
void
)
78
{
79
static
bool
On
=
false
;
80
81
if
(
Chip_TIMER_MatchPending
(
LPC_TIMER1
, 1)) {
82
Chip_TIMER_ClearMatch
(
LPC_TIMER1
, 1);
83
On = (bool) !On;
84
Board_LED_Set
(0, On);
85
}
86
}
87
92
int
main
(
void
)
93
{
94
uint32_t
timerFreq;
95
96
Board_Init
();
97
Board_LED_Init
();
98
99
/* Enable timer 1 clock and reset it */
100
Chip_Clock_EnableOpts
(
CLK_MX_TIMER1
,
true
,
true
, 1);
101
Chip_RGU_TriggerReset
(
RGU_TIMER1_RST
);
102
while
(
Chip_RGU_InReset
(
RGU_TIMER1_RST
)) {}
103
104
/* Get timer 1 peripheral clock rate */
105
timerFreq =
Chip_Clock_GetRate
(
CLK_MX_TIMER1
);
106
107
/* Timer setup for match and interrupt at TICKRATE_HZ */
108
Chip_TIMER_Reset
(
LPC_TIMER1
);
109
Chip_TIMER_MatchEnableInt
(
LPC_TIMER1
, 1);
110
Chip_TIMER_SetMatch
(
LPC_TIMER1
, 1, (timerFreq /
TICKRATE_HZ
));
111
Chip_TIMER_ResetOnMatchEnable
(
LPC_TIMER1
, 1);
112
Chip_TIMER_Enable
(
LPC_TIMER1
);
113
114
/* Enable timer interrupt */
115
NVIC_EnableIRQ(TIMER1_IRQn);
116
NVIC_ClearPendingIRQ(TIMER1_IRQn);
117
118
DEBUGSTR
(
"Blinky example using timer 1!\r\n"
);
119
DEBUGOUT
(
"Timer 1 clock = %d Hz\r\n"
, timerFreq);
120
DEBUGOUT
(
"Timer 1 tick rate = %d Hz\r\n"
,
TICKRATE_HZ
);
121
122
while
(1) {
123
__WFI();
124
}
125
}
126
applications
lpc18xx_43xx
examples
periph
periph_blinky
blinky.c
Generated on Fri Nov 16 2012 13:36:38 for LPCOpen Platform by
1.8.2