diff options
Diffstat (limited to 'examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpio_ctrl.c')
| -rw-r--r-- | examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpio_ctrl.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpio_ctrl.c b/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpio_ctrl.c new file mode 100644 index 0000000..4cd0b7f --- /dev/null +++ b/examples/imx7_colibri_m4/demo_apps/blinking_imx_demo/gpio_ctrl.c @@ -0,0 +1,169 @@ +/* + * Copyright (c) 2015, Freescale Semiconductor, Inc. + * 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. + */ +/**************************************************************************** +* +* Comments: +* This file contains the functions which write and read the SPI memories +* using the ECSPI driver in interrupt mode. +* +****************************************************************************/ + +#include <stdbool.h> +#include "FreeRTOS.h" +#include "semphr.h" +#include "gpio_pins.h" +#include "board.h" +#include "gpio_ctrl.h" +#include "gpio_imx.h" +#include "rdc_semaphore.h" +#include "debug_console_imx.h" + +static SemaphoreHandle_t xSemaphore; + +static void GPIO_Ctrl_InitLedPin() +{ +#ifdef BOARD_GPIO_LED_CONFIG + gpio_init_t ledInit = { + .pin = BOARD_GPIO_LED_CONFIG->pin, + .direction = gpioDigitalOutput, + .interruptMode = gpioNoIntmode + }; + + /* Acquire RDC semaphore before access GPIO to avoid conflict, it's + * necessary when GPIO RDC is configured as Semaphore Required */ + RDC_SEMAPHORE_Lock(BOARD_GPIO_LED_RDC_PDAP); + + GPIO_Init(BOARD_GPIO_LED_CONFIG->base, &ledInit); + + RDC_SEMAPHORE_Unlock(BOARD_GPIO_LED_RDC_PDAP); +#endif +} + +static void GPIO_Ctrl_InitKeyPin() +{ +#ifdef BOARD_GPIO_KEY_CONFIG + gpio_init_t keyInit = { + .pin = BOARD_GPIO_KEY_CONFIG->pin, + .direction = gpioDigitalInput, + .interruptMode = gpioIntFallingEdge + }; + + /* Acquire RDC semaphore before access GPIO to avoid conflict, it's + * necessary when GPIO RDC is configured as Semaphore Required */ + RDC_SEMAPHORE_Lock(BOARD_GPIO_KEY_RDC_PDAP); + + GPIO_Init(BOARD_GPIO_KEY_CONFIG->base, &keyInit); + + RDC_SEMAPHORE_Unlock(BOARD_GPIO_KEY_RDC_PDAP); + + /* Set GPT interrupt priority 3 */ + NVIC_SetPriority(BOARD_GPIO_KEY_IRQ_NUM, 3); +#endif +} + +void GPIO_Ctrl_Init() +{ + xSemaphore = xSemaphoreCreateBinary(); + + GPIO_Ctrl_InitLedPin(); + GPIO_Ctrl_InitKeyPin(); +} + +void GPIO_Ctrl_ToggleLed() +{ + static bool on = false; + +#ifdef BOARD_GPIO_LED_CONFIG + RDC_SEMAPHORE_Lock(BOARD_GPIO_LED_RDC_PDAP); + + GPIO_WritePinOutput(BOARD_GPIO_LED_CONFIG->base, + BOARD_GPIO_LED_CONFIG->pin, on ? gpioPinSet : gpioPinClear); + + RDC_SEMAPHORE_Unlock(BOARD_GPIO_LED_RDC_PDAP); +#else + PRINTF("%c ", on ? '+' : '-'); +#endif + + on = !on; +} + +void GPIO_Ctrl_WaitKeyPressed() +{ + TickType_t ticks; + +#ifdef BOARD_GPIO_KEY_CONFIG + RDC_SEMAPHORE_Lock(BOARD_GPIO_KEY_RDC_PDAP); + + /* Clear the interrupt state */ + GPIO_ClearStatusFlag(BOARD_GPIO_KEY_CONFIG->base, BOARD_GPIO_KEY_CONFIG->pin); + /* Enable GPIO pin interrupt */ + GPIO_SetPinIntMode(BOARD_GPIO_KEY_CONFIG->base, BOARD_GPIO_KEY_CONFIG->pin, true); + + RDC_SEMAPHORE_Unlock(BOARD_GPIO_KEY_RDC_PDAP); + + /* Enable the IRQ. */ + NVIC_EnableIRQ(BOARD_GPIO_KEY_IRQ_NUM); + + /* We need wait user input for ever */ + ticks = portMAX_DELAY; + + PRINTF("\n\rPress the (%s) key to switch the blinking frequency:\n\r", BOARD_GPIO_KEY_CONFIG->name); +#else + /* Without key on board, we return every 5 seconds */ + ticks = configTICK_RATE_HZ * 5; + PRINTF("\n\rWait 5 seconds to switch blinking frequency:\n\r"); +#endif + xSemaphoreTake(xSemaphore, ticks); +} + +#ifdef BOARD_GPIO_KEY_CONFIG +void BOARD_GPIO_KEY_HANDLER() +{ + BaseType_t xHigherPriorityTaskWoken; + + /* When user input captured, we disable GPIO interrupt */ + NVIC_DisableIRQ(BOARD_GPIO_KEY_IRQ_NUM); + + RDC_SEMAPHORE_Lock(BOARD_GPIO_KEY_RDC_PDAP); + + /* Disable GPIO pin interrupt */ + GPIO_SetPinIntMode(BOARD_GPIO_KEY_CONFIG->base, BOARD_GPIO_KEY_CONFIG->pin, false); + /* Clear the interrupt state */ + GPIO_ClearStatusFlag(BOARD_GPIO_KEY_CONFIG->base, BOARD_GPIO_KEY_CONFIG->pin); + + RDC_SEMAPHORE_Unlock(BOARD_GPIO_KEY_RDC_PDAP); + + xSemaphoreGiveFromISR(xSemaphore, &xHigherPriorityTaskWoken); +} +#endif + +/******************************************************************************* + * EOF + ******************************************************************************/ |