55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/* Very basic example to test the pwm library
|
|
* Hook up an LED to pin14 and you should see the intensity change
|
|
*
|
|
* Part of esp-open-rtos
|
|
* Copyright (C) 2015 Javier Cardona (https://github.com/jcard0na)
|
|
* BSD Licensed as described in the file LICENSE
|
|
*/
|
|
#include "espressif/esp_common.h"
|
|
#include "esp/uart.h"
|
|
#include "FreeRTOS.h"
|
|
#include "task.h"
|
|
#include "new_pwm.h"
|
|
|
|
#define PWM_CHANNELS 3
|
|
const uint32_t period = 5000; // * 200ns ^= 1 kHz
|
|
|
|
// PWM setup
|
|
uint32_t io_info[PWM_CHANNELS][3] = {
|
|
{0, 0, 12},
|
|
{0, 0, 13},
|
|
{0, 0, 15},
|
|
};
|
|
|
|
// Initial duty: all off
|
|
uint32_t pwm_duty_init[PWM_CHANNELS] = {0};
|
|
|
|
void pwm_task(void *pvParameters)
|
|
{
|
|
uint32_t counts[PWM_CHANNELS] = {0, 1000, 3000};
|
|
while(1) {
|
|
vTaskDelay(10);
|
|
for (uint8_t ii=0; ii<PWM_CHANNELS; ii++) {
|
|
pwm_set_duty(counts[ii], ii);
|
|
counts[ii] += period/32;
|
|
if (counts[ii] > period)
|
|
counts[ii] = 0;
|
|
}
|
|
pwm_start();
|
|
}
|
|
}
|
|
|
|
void user_init(void)
|
|
{
|
|
uart_set_baud(0, 115200);
|
|
|
|
printf("SDK version:%s\n", sdk_system_get_sdk_version());
|
|
|
|
printf("pwm_init()\n");
|
|
pwm_init(period, pwm_duty_init, PWM_CHANNELS, io_info);
|
|
|
|
printf("pwm_start()\n");
|
|
pwm_start();
|
|
|
|
xTaskCreate(pwm_task, "new_pwm", 256, NULL, 2, NULL);
|
|
}
|