diff options
Diffstat (limited to 'platform/drivers/src/gpio_vf6xx.c')
| -rw-r--r-- | platform/drivers/src/gpio_vf6xx.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/platform/drivers/src/gpio_vf6xx.c b/platform/drivers/src/gpio_vf6xx.c new file mode 100644 index 0000000..28d8cd1 --- /dev/null +++ b/platform/drivers/src/gpio_vf6xx.c @@ -0,0 +1,97 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * Copyright (c) 2016, Toradex AG + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * o Redistributions of source code must retain the above copyright notice, this list + * of conditions and the following disclaimer. + * + * o 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. + * + * o Neither the name of Freescale Semiconductor, Inc. nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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_vf6xx.h" + +/******************************************************************************* + * Code + ******************************************************************************/ + +/******************************************************************************* + * GPIO Initialization and Configuration functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : GPIO_Init + * Description : Initializes the GPIO module according to the specified + * parameters in the initStruct. + * + *END**************************************************************************/ +void GPIO_Init(GPIO_Type* base, gpio_init_t* initStruct) +{ + uint32_t dir; + uint32_t iomux_addr; + + /* + * Only on Vybrid the input/output buffer enable flags + * are part of the shared mux/conf register. + */ + iomux_addr = iomux_gpio_pad_addr[initStruct->pin]; + dir = *((volatile uint32_t *)((uint32_t)iomux_addr)); + + dir &= ~(0x3); + if (initStruct->direction == gpioDigitalOutput) { + dir |= 0x2U; + } else if (initStruct->direction == gpioDigitalInput) { + dir |= 0x1U; + } + + *((volatile uint32_t *)((uint32_t)iomux_addr)) = dir; +} + +/******************************************************************************* + * GPIO Read and Write Functions + ******************************************************************************/ +/*FUNCTION********************************************************************** + * + * Function Name : GPIO_WritePinOutput + * Description : Sets the output level of the individual GPIO pin. + * + *END**************************************************************************/ +void GPIO_WritePinOutput(GPIO_Type* base, uint32_t pin, gpio_pin_action_t pinVal) +{ + if (pinVal == gpioPinSet) + GPIO_PSOR_REG(base) |= GPIO_OFFSET(pin); /* Set pin output to high level.*/ + else + GPIO_PSOR_REG(base) &= ~(GPIO_OFFSET(pin)); /* Set pin output to low level.*/ +} + +void GPIO_TogglePinOutput(GPIO_Type* base, uint32_t pin, gpio_pin_action_t pinVal) +{ + if (pinVal == gpioPinSet) + GPIO_PTOR_REG(base) |= GPIO_OFFSET(pin); /* Set pin output to high level.*/ + else + GPIO_PTOR_REG(base) &= ~(GPIO_OFFSET(pin)); /* Set pin output to low level.*/ +} + +/******************************************************************************* + * EOF + ******************************************************************************/ |