64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* The "blink" example, but writing the LED from timer interrupts
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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 "esp/uart.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_frc1 = 12;
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const int freq_frc1 = 1;
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const int gpio_frc2 = 14;
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const int freq_frc2 = 10;
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static volatile uint32_t frc1_count;
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static volatile uint32_t frc2_count;
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void frc1_interrupt_handler(void)
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{
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frc1_count++;
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gpio_toggle(gpio_frc1);
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}
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void frc2_interrupt_handler(void)
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{
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/* FRC2 needs the match register updated on each timer interrupt */
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timer_set_frequency(FRC2, freq_frc2);
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frc2_count++;
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gpio_toggle(gpio_frc2);
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}
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void user_init(void)
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{
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uart_set_baud(0, 115200);
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/* configure GPIOs */
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gpio_enable(gpio_frc1, GPIO_OUTPUT);
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gpio_enable(gpio_frc2, GPIO_OUTPUT);
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gpio_write(gpio_frc1, 1);
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/* stop both timers and mask their interrupts as a precaution */
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timer_set_interrupts(FRC1, false);
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timer_set_run(FRC1, false);
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timer_set_interrupts(FRC2, false);
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timer_set_run(FRC2, false);
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/* set up ISRs */
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_xt_isr_attach(INUM_TIMER_FRC1, frc1_interrupt_handler);
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_xt_isr_attach(INUM_TIMER_FRC2, frc2_interrupt_handler);
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/* configure timer frequencies */
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timer_set_frequency(FRC1, freq_frc1);
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timer_set_frequency(FRC2, freq_frc2);
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/* unmask interrupts and start timers */
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timer_set_interrupts(FRC1, true);
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timer_set_run(FRC1, true);
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timer_set_interrupts(FRC2, true);
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timer_set_run(FRC2, true);
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gpio_write(gpio_frc1, 0);
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}
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