Add GPIO config, interrupt registers, GPIO interrupt support, 'button' example
This commit is contained in:
Angus Gratton
parent
822533fd92
commit
0078252df3
7 changed files with 377 additions and 16 deletions
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@ -13,7 +13,8 @@ const int gpio = 14;
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/* This task uses the high level GPIO API (esp_gpio.h) to blink an LED.
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*
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* Even though it reads better than the register-level version in blinkenRegisterTask,
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* they compile to the exact same instructions.
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* they compile to the exact same instructions (except gpio_enable also set the output type in
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* the GPIO control register).
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*/
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void blinkenTask(void *pvParameters)
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{
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@ -32,8 +33,9 @@ void blinkenTask(void *pvParameters)
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It's not fully parameterised, as the IOMUX_SET macro requires the pin number
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as part of the GPxx value.
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This code compiles to the exact same instructions as blinkenTask,
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so it's probably better to use the blinkenTask version.
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There is no significant performance benefit to this way over the
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blinkenTask version, so it's probably better to use the blinkenTask
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version.
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NOTE: This task isn't enabled by default, see the commented out line in user_init.
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*/
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127
examples/button/FreeRTOSConfig.h
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127
examples/button/FreeRTOSConfig.h
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@ -0,0 +1,127 @@
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/*
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FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS provides completely free yet professionally developed, *
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* robust, strictly quality controlled, supported, and cross *
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* platform software that has become a de facto standard. *
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* *
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* Help yourself get started quickly and support the FreeRTOS *
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* project by purchasing a FreeRTOS tutorial book, reference *
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* manual, or both from: http://www.FreeRTOS.org/Documentation *
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* *
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* Thank you! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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>>! NOTE: The modification to the GPL is included to allow you to distribute
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>>! a combined work that includes FreeRTOS without being obliged to provide
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>>! the source code for proprietary components outside of the FreeRTOS
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>>! kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. Full license text is available from the following
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link: http://www.freertos.org/a00114.html
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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compatible FAT file system, and our tiny thread aware UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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licenses offer ticketed support, indemnification and middleware.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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1 tab == 4 spaces!
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*/
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#ifndef FREERTOS_CONFIG_H
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#define FREERTOS_CONFIG_H
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/*-----------------------------------------------------------
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* Application specific definitions.
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*
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* These definitions should be adjusted for your particular hardware and
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* application requirements.
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*
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* THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
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* FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
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*
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* See http://www.freertos.org/a00110.html.
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*----------------------------------------------------------*/
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#define configUSE_PREEMPTION 1
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#define configUSE_IDLE_HOOK 0
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#define configUSE_TICK_HOOK 0
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#define configCPU_CLOCK_HZ ( ( unsigned long ) 80000000 )
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#define configTICK_RATE_HZ ( ( portTickType ) 100 )
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#define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 15 )
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#define configMINIMAL_STACK_SIZE ( ( unsigned short )156 )
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#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 32 * 1024 ) )
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#define configMAX_TASK_NAME_LEN ( 16 )
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#define configUSE_TRACE_FACILITY 0
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#define configUSE_STATS_FORMATTING_FUNCTIONS 0
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#define configUSE_16_BIT_TICKS 0
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#define configIDLE_SHOULD_YIELD 1
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#define INCLUDE_xTaskGetIdleTaskHandle 1
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#define INCLUDE_xTimerGetTimerDaemonTaskHandle 1
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#define configCHECK_FOR_STACK_OVERFLOW 2
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#define configUSE_MUTEXES 1
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#define configUSE_TIMERS 1
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#if configUSE_TIMERS
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#define configTIMER_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define configTIMER_QUEUE_LENGTH (10)
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#define configTIMER_TASK_STACK_DEPTH ( ( unsigned short ) 512 )
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#endif
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/* Co-routine definitions. */
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#define configUSE_CO_ROUTINES 0
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#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
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/* Set the following definitions to 1 to include the API function, or zero
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to exclude the API function. */
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#define INCLUDE_vTaskPrioritySet 1
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#define INCLUDE_uxTaskPriorityGet 1
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#define INCLUDE_vTaskDelete 1
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#define INCLUDE_vTaskCleanUpResources 0
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#define INCLUDE_vTaskSuspend 1
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#define INCLUDE_vTaskDelayUntil 1
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#define INCLUDE_vTaskDelay 1
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/*set the #define for debug info*/
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#define INCLUDE_xTaskGetCurrentTaskHandle 1
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#define INCLUDE_uxTaskGetStackHighWaterMark 1
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#endif /* FREERTOS_CONFIG_H */
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2
examples/button/Makefile
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2
examples/button/Makefile
Normal file
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@ -0,0 +1,2 @@
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TARGET=button
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include ../../common.mk
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84
examples/button/button.c
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84
examples/button/button.c
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@ -0,0 +1,84 @@
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/* Respond to a button press.
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*
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* This code combines two ways of checking for a button press -
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* busy polling (the bad way) and button interrupt (the good way).
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*
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* This sample code is in the public domain.
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*/
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#include "espressif/esp_common.h"
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#include "espressif/sdk_private.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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#include "esp8266.h"
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/* pin config */
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const int gpio = 0; /* gpio 0 usually has "PROGRAM" button attached */
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const int active = 0; /* active == 0 for active low */
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const gpio_interrupt_t int_type = INT_FALLING;
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#define GPIO_HANDLER gpio00_interrupt_handler
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/* This task polls for the button and prints the tick
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count when it's seen.
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Debounced to 200ms with a simple vTaskDelay.
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This is not a good example of how to wait for button input!
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*/
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void buttonPollTask(void *pvParameters)
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{
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printf("Polling for button press on gpio %d...\r\n", gpio);
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while(1) {
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while(gpio_read(gpio) != active)
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{
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taskYIELD();
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}
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printf("Polled for button press at %dms\r\n", xTaskGetTickCount()*portTICK_RATE_MS);
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vTaskDelay(200 / portTICK_RATE_MS);
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}
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}
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/* This task configures the GPIO interrupt and uses it to tell
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when the button is pressed.
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The interrupt handler communicates the exact button press time to
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the task via a queue.
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This is a better example of how to wait for button input!
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*/
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void buttonIntTask(void *pvParameters)
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{
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printf("Waiting for button press interrupt on gpio %d...\r\n", gpio);
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xQueueHandle *tsqueue = (xQueueHandle *)pvParameters;
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gpio_set_interrupt(gpio, int_type);
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uint32_t last = 0;
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while(1) {
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uint32_t button_ts;
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xQueueReceive(*tsqueue, &button_ts, portMAX_DELAY);
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button_ts *= portTICK_RATE_MS;
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if(last < button_ts-200) {
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printf("Button interrupt fired at %dms\r\n", button_ts);
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last = button_ts;
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}
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}
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}
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static xQueueHandle tsqueue;
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void GPIO_HANDLER(void)
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{
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uint32_t now = xTaskGetTickCountFromISR();
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xQueueSendToBackFromISR(tsqueue, &now, NULL);
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}
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void user_init(void)
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{
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sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
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gpio_enable(gpio, GPIO_INPUT);
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tsqueue = xQueueCreate(2, sizeof(uint32_t));
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xTaskCreate(buttonIntTask, (signed char *)"buttonIntTask", 256, &tsqueue, 2, NULL);
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xTaskCreate(buttonPollTask, (signed char*)"buttonPollTask", 256, NULL, 1, NULL);
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}
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