59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/* The classic "blink" example
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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 "esp8266.h"
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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 (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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gpio_enable(gpio, GPIO_OUTPUT);
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while(1) {
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gpio_write(gpio, 1);
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vTaskDelay(1000 / portTICK_RATE_MS);
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gpio_write(gpio, 0);
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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}
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/* This task uses all raw register operations to set the pins.
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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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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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void blinkenRegisterTask(void *pvParameters)
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{
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GPIO_DIR_SET = BIT(gpio);
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IOMUX_SET(GP14,GPIO,IOMUX_OE); /* change this line if you change 'gpio' */
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while(1) {
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GPIO_OUT_SET = BIT(gpio);
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vTaskDelay(1000 / portTICK_RATE_MS);
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GPIO_OUT_CLEAR = BIT(gpio);
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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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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xTaskCreate(blinkenTask, (signed char *)"blinkenTask", 256, NULL, 2, NULL);
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//xTaskCreate(blinkenRegisterTask, (signed char *)"blinkenRegisterTask", 256, NULL, 2, NULL);
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}
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