Contiki-NG
gpio.c
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1 /*
2  * Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  *
14  * 3. Neither the name of the copyright holder nor the names of its
15  * contributors may be used to endorse or promote products derived
16  * from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29  * OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 /**
32  * \addtogroup cc2538-gpio
33  * @{
34  *
35  * \file
36  * Implementation of the cc2538 GPIO controller
37  */
38 #include "contiki.h"
39 #include "dev/leds.h"
40 #include "dev/gpio-hal.h"
41 #include "dev/gpio.h"
42 #include "dev/nvic.h"
43 #include "reg.h"
44 #include "lpm.h"
45 
46 #include <string.h>
47 /*---------------------------------------------------------------------------*/
48 /** \brief Interrupt service routine for Port \a port
49  * \param port Number between 0 and 3. Port A: 0, Port B: 1, etc.
50  */
51 static void
52 gpio_port_isr(uint8_t port)
53 {
54  uint32_t base;
55  uint8_t int_status, power_up_int_status;
56 
57  lpm_exit();
58 
59  base = GPIO_PORT_TO_BASE(port);
60  int_status = GPIO_GET_MASKED_INT_STATUS(base);
61  power_up_int_status = GPIO_GET_POWER_UP_INT_STATUS(port);
62 
63  gpio_hal_event_handler((int_status | power_up_int_status) << (port << 3));
64 
65  GPIO_CLEAR_INTERRUPT(base, int_status);
66  GPIO_CLEAR_POWER_UP_INTERRUPT(port, power_up_int_status);
67 }
68 /*---------------------------------------------------------------------------*/
69 #define GPIO_PORT_ISR(lowercase_port, uppercase_port) \
70 void \
71 gpio_port_##lowercase_port##_isr(void) \
72 { \
73  gpio_port_isr(GPIO_##uppercase_port##_NUM); \
74 }
75 GPIO_PORT_ISR(a, A)
76 GPIO_PORT_ISR(b, B)
77 GPIO_PORT_ISR(c, C)
78 GPIO_PORT_ISR(d, D)
79 /*---------------------------------------------------------------------------*/
80 /** @} */
Header file for the ARM Nested Vectored Interrupt Controller.
#define GPIO_CLEAR_POWER_UP_INTERRUPT(PORT, PIN_MASK)
Clear power-up interrupt triggering for pins with PIN_MASK of port PORT.
Definition: gpio.h:310
Header file with register and macro declarations for the cc2538 GPIO module.
Header file with register manipulation macro definitions.
#define GPIO_GET_POWER_UP_INT_STATUS(PORT)
Get power-up interrupt status of port PORT.
Definition: gpio.h:302
static uint8_t int_status(void)
Check whether a data or wake on motion interrupt has occurred.
static void gpio_port_isr(uint8_t port)
Interrupt service routine for Port port.
Definition: gpio.c:52
Header file for the GPIO HAL.
void gpio_hal_event_handler(gpio_hal_port_t port, gpio_hal_pin_mask_t pins)
The platform-independent GPIO event handler.
#define GPIO_PORT_TO_BASE(PORT)
Converts a port number to the port base address.
Definition: gpio.h:328
Header file for the LED HAL.
#define GPIO_CLEAR_INTERRUPT(PORT_BASE, PIN_MASK)
Clear interrupt triggering for pins with PIN_MASK of port with PORT_BASE.
Definition: gpio.h:242
#define GPIO_GET_MASKED_INT_STATUS(PORT_BASE)
Get masked interrupt status of port with PORT_BASE.
Definition: gpio.h:234