diff options
author | David A. Mellis <d.mellis@arduino.cc> | 2012-09-13 10:41:16 -0400 |
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committer | David A. Mellis <d.mellis@arduino.cc> | 2012-09-13 10:41:16 -0400 |
commit | 0d9a111face4f3629bcae8e52af843792af3b453 (patch) | |
tree | 7cc1b8c1b0c1acb7c90a75f258ce036dac494b17 /firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c |
Moving into firmwares directory.
Diffstat (limited to 'firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c')
-rw-r--r-- | firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c b/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c new file mode 100644 index 0000000..b6b83c7 --- /dev/null +++ b/firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/GPIO/gpio.c @@ -0,0 +1,458 @@ +/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */ + +/*This file has been prepared for Doxygen automatic documentation generation.*/ +/*! \file ********************************************************************* + * + * \brief GPIO driver for AVR32 UC3. + * + * This file defines a useful set of functions for the GPIO. + * + * - Compiler: IAR EWAVR32 and GNU GCC for AVR32 + * - Supported devices: All AVR32 devices with a GPIO module can be used. + * - AppNote: + * + * \author Atmel Corporation: http://www.atmel.com \n + * Support and FAQ: http://support.atmel.no/ + * + *****************************************************************************/ + +/* Copyright (c) 2009 Atmel Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The name of Atmel may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * 4. This software may only be redistributed and used in connection with an Atmel + * AVR product. + * + * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE + * + */ + +#include "gpio.h" + +//! GPIO module instance. +#define GPIO AVR32_GPIO + + +/*! \name Peripheral Bus Interface + */ +//! @{ + + +int gpio_enable_module(const gpio_map_t gpiomap, unsigned int size) +{ + int status = GPIO_SUCCESS; + unsigned int i; + + for (i = 0; i < size; i++) + { + status |= gpio_enable_module_pin(gpiomap->pin, gpiomap->function); + gpiomap++; + } + + return status; +} + + +int gpio_enable_module_pin(unsigned int pin, unsigned int function) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + // Enable the correct function. + switch (function) + { + case 0: // A function. + gpio_port->pmr0c = 1 << (pin & 0x1F); + gpio_port->pmr1c = 1 << (pin & 0x1F); +#if defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + gpio_port->pmr2c = 1 << (pin & 0x1F); +#endif + break; + + case 1: // B function. + gpio_port->pmr0s = 1 << (pin & 0x1F); + gpio_port->pmr1c = 1 << (pin & 0x1F); +#if defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + gpio_port->pmr2c = 1 << (pin & 0x1F); +#endif + break; + + case 2: // C function. + gpio_port->pmr0c = 1 << (pin & 0x1F); + gpio_port->pmr1s = 1 << (pin & 0x1F); +#if defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + gpio_port->pmr2c = 1 << (pin & 0x1F); +#endif + break; + + case 3: // D function. + gpio_port->pmr0s = 1 << (pin & 0x1F); + gpio_port->pmr1s = 1 << (pin & 0x1F); +#if defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + gpio_port->pmr2c = 1 << (pin & 0x1F); +#endif + break; + +#if defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + case 4: // E function. + gpio_port->pmr0c = 1 << (pin & 0x1F); + gpio_port->pmr1c = 1 << (pin & 0x1F); + gpio_port->pmr2s = 1 << (pin & 0x1F); + break; + + case 5: // F function. + gpio_port->pmr0s = 1 << (pin & 0x1F); + gpio_port->pmr1c = 1 << (pin & 0x1F); + gpio_port->pmr2s = 1 << (pin & 0x1F); + break; + + case 6: // G function. + gpio_port->pmr0c = 1 << (pin & 0x1F); + gpio_port->pmr1s = 1 << (pin & 0x1F); + gpio_port->pmr2s = 1 << (pin & 0x1F); + break; + + case 7: // H function. + gpio_port->pmr0s = 1 << (pin & 0x1F); + gpio_port->pmr1s = 1 << (pin & 0x1F); + gpio_port->pmr2s = 1 << (pin & 0x1F); + break; +#endif + + default: + return GPIO_INVALID_ARGUMENT; + } + + // Disable GPIO control. + gpio_port->gperc = 1 << (pin & 0x1F); + + return GPIO_SUCCESS; +} + + +void gpio_enable_gpio(const gpio_map_t gpiomap, unsigned int size) +{ + unsigned int i; + + for (i = 0; i < size; i++) + { + gpio_enable_gpio_pin(gpiomap->pin); + gpiomap++; + } +} + + +void gpio_enable_gpio_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->oderc = 1 << (pin & 0x1F); + gpio_port->gpers = 1 << (pin & 0x1F); +} + + +// The open-drain mode is not synthesized on the current AVR32 products. +// If one day some AVR32 products have this feature, the corresponding part +// numbers should be listed in the #if below. +// Note that other functions are available in this driver to use pins with open +// drain in GPIO mode. The advantage of the open-drain mode functions over these +// other functions is that they can be used not only in GPIO mode but also in +// module mode. +#if 0 + + +void gpio_enable_pin_open_drain(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->odmers = 1 << (pin & 0x1F); +} + + +void gpio_disable_pin_open_drain(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->odmerc = 1 << (pin & 0x1F); +} + + +#endif + + +void gpio_enable_pin_pull_up(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->puers = 1 << (pin & 0x1F); +#if defined(AVR32_GPIO_200_H_INCLUDED) || defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) + gpio_port->pderc = 1 << (pin & 0x1F); +#endif +} + + +void gpio_disable_pin_pull_up(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->puerc = 1 << (pin & 0x1F); +} + +#if defined(AVR32_GPIO_200_H_INCLUDED) || defined(AVR32_GPIO_210_H_INCLUDED) || defined(AVR32_GPIO_211_H_INCLUDED) +// Added support of Pull-up Resistor, Pull-down Resistor and Buskeeper Control. + +/*! \brief Enables the pull-down resistor of a pin. + * + * \param pin The pin number. + */ +void gpio_enable_pin_pull_down(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->puerc = 1 << (pin & 0x1F); + gpio_port->pders = 1 << (pin & 0x1F); +} + +/*! \brief Disables the pull-down resistor of a pin. + * + * \param pin The pin number. + */ +void gpio_disable_pin_pull_down(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->pderc = 1 << (pin & 0x1F); +} + +/*! \brief Enables the buskeeper functionality on a pin. + * + * \param pin The pin number. + */ +void gpio_enable_pin_buskeeper(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->puers = 1 << (pin & 0x1F); + gpio_port->pders = 1 << (pin & 0x1F); +} + +/*! \brief Disables the buskeeper functionality on a pin. + * + * \param pin The pin number. + */ +void gpio_disable_pin_buskeeper(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->puerc = 1 << (pin & 0x1F); + gpio_port->pderc = 1 << (pin & 0x1F); +} + +#endif + +int gpio_get_pin_value(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + return (gpio_port->pvr >> (pin & 0x1F)) & 1; +} + + +int gpio_get_gpio_pin_output_value(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + return (gpio_port->ovr >> (pin & 0x1F)) & 1; +} + + +int gpio_get_gpio_open_drain_pin_output_value(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + return ((gpio_port->oder >> (pin & 0x1F)) & 1) ^ 1; +} + + +void gpio_set_gpio_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->ovrs = 1 << (pin & 0x1F); // Value to be driven on the I/O line: 1. + gpio_port->oders = 1 << (pin & 0x1F); // The GPIO output driver is enabled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_clr_gpio_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->ovrc = 1 << (pin & 0x1F); // Value to be driven on the I/O line: 0. + gpio_port->oders = 1 << (pin & 0x1F); // The GPIO output driver is enabled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_tgl_gpio_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->ovrt = 1 << (pin & 0x1F); // Toggle the I/O line. + gpio_port->oders = 1 << (pin & 0x1F); // The GPIO output driver is enabled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_set_gpio_open_drain_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->oderc = 1 << (pin & 0x1F); // The GPIO output driver is disabled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_clr_gpio_open_drain_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->ovrc = 1 << (pin & 0x1F); // Value to be driven on the I/O line: 0. + gpio_port->oders = 1 << (pin & 0x1F); // The GPIO output driver is enabled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_tgl_gpio_open_drain_pin(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + gpio_port->ovrc = 1 << (pin & 0x1F); // Value to be driven on the I/O line if the GPIO output driver is enabled: 0. + gpio_port->odert = 1 << (pin & 0x1F); // The GPIO output driver is toggled for that pin. + gpio_port->gpers = 1 << (pin & 0x1F); // The GPIO module controls that pin. +} + + +void gpio_enable_pin_glitch_filter(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->gfers = 1 << (pin & 0x1F); +} + + +void gpio_disable_pin_glitch_filter(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->gferc = 1 << (pin & 0x1F); +} + +/*! \brief Configure the edge detector of an input pin + * + * \param pin The pin number. + * \param mode The edge detection mode (\ref GPIO_PIN_CHANGE, \ref GPIO_RISING_EDGE + * or \ref GPIO_FALLING_EDGE). + * + * \return \ref GPIO_SUCCESS or \ref GPIO_INVALID_ARGUMENT. + */ +static int gpio_configure_edge_detector(unsigned int pin, unsigned int mode) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + // Configure the edge detector. + switch (mode) + { + case GPIO_PIN_CHANGE: + gpio_port->imr0c = 1 << (pin & 0x1F); + gpio_port->imr1c = 1 << (pin & 0x1F); + break; + + case GPIO_RISING_EDGE: + gpio_port->imr0s = 1 << (pin & 0x1F); + gpio_port->imr1c = 1 << (pin & 0x1F); + break; + + case GPIO_FALLING_EDGE: + gpio_port->imr0c = 1 << (pin & 0x1F); + gpio_port->imr1s = 1 << (pin & 0x1F); + break; + + default: + return GPIO_INVALID_ARGUMENT; + } + + return GPIO_SUCCESS; +} + + +int gpio_enable_pin_interrupt(unsigned int pin, unsigned int mode) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + // Enable the glitch filter. + gpio_port->gfers = 1 << (pin & 0x1F); + + // Configure the edge detector. + if(GPIO_INVALID_ARGUMENT == gpio_configure_edge_detector(pin, mode)) + return(GPIO_INVALID_ARGUMENT); + + // Enable interrupt. + gpio_port->iers = 1 << (pin & 0x1F); + + return GPIO_SUCCESS; +} + + +void gpio_disable_pin_interrupt(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->ierc = 1 << (pin & 0x1F); +} + + +int gpio_get_pin_interrupt_flag(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + return (gpio_port->ifr >> (pin & 0x1F)) & 1; +} + + +void gpio_clear_pin_interrupt_flag(unsigned int pin) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + gpio_port->ifrc = 1 << (pin & 0x1F); +} + + +//# +//# Peripheral Event System Support. +//# +#if UC3L +int gpio_configure_pin_periph_event_mode(unsigned int pin, unsigned int mode, unsigned int use_igf) +{ + volatile avr32_gpio_port_t *gpio_port = &GPIO.port[pin >> 5]; + + if(TRUE == use_igf) + { + // Enable the glitch filter. + gpio_port->gfers = 1 << (pin & 0x1F); + } + else + { + // Disable the glitch filter. + gpio_port->gferc = 1 << (pin & 0x1F); + } + + // Configure the edge detector. + return(gpio_configure_edge_detector(pin, mode)); +} + +#endif + +//! @} |