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cpu/cc2538: initialize the GPIO controller to a default state

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This commit is contained in:
Ian Martin 2015-07-27 16:37:31 -04:00
parent f7ddeb243e
commit 4936edb80f
3 changed files with 53 additions and 0 deletions
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38
cpu/cc2538/cc2538-gpio.c Normal file
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@ -0,0 +1,38 @@
/*
* Copyright (C) 2015 Loci Controls Inc.
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @addtogroup cpu_cc2538
* @{
*
* @file cc2538-gpio.c
* @brief cc2538 GPIO controller driver implementation
*
* @author Ian Martin <ian@locicontrols.com>
* @{
*/
#include "cc2538_gpio.h"
void cc2538_gpio_port_init(cc2538_gpio_t* gpio_port) {
/* Disable power-up interrupts */
gpio_port->PI_IEN = 0;
/* Disable normal interrupts */
gpio_port->IE = 0;
/* Clear any pending interrupts */
gpio_port->IC = 0xff;
}
void cc2538_gpio_init(void) {
cc2538_gpio_port_init(GPIO_A);
cc2538_gpio_port_init(GPIO_B);
cc2538_gpio_port_init(GPIO_C);
cc2538_gpio_port_init(GPIO_D);
}

2
cpu/cc2538/cpu.c
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@ -47,6 +47,8 @@ void cpu_init(void)
SYS_CTRL->I_MAP = 1;
/* initialize the clock system */
cpu_clock_init();
/* initialize the GPIO controller */
cc2538_gpio_init();
}
/**

13
cpu/cc2538/include/cc2538_gpio.h
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@ -281,6 +281,19 @@ typedef struct {
#define IOC ((cc2538_ioc_t *)0x400d4000) /**< IOC instance */
/** @} */
/**
* @brief Initialize a GPIO port.
* @details Initializes the port to a default state, disables interrupts and
* clears any pending interrupts.
* @param[in] gpio_port A pointer to the port's instance, e.g. "GPIO_A".
*/
void cc2538_gpio_port_init(cc2538_gpio_t* gpio_port);
/**
* @brief Initialize all four GPIO ports.
*/
void cc2538_gpio_init(void);
#ifdef __cplusplus
} /* end extern "C" */
#endif