48 lines
1 KiB
C
48 lines
1 KiB
C
/*
|
|
* Example of using PCA9685 PWM driver
|
|
*
|
|
* Part of esp-open-rtos
|
|
* Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
|
|
* Public domain
|
|
*/
|
|
#include <esp/uart.h>
|
|
#include <espressif/esp_common.h>
|
|
#include <i2c/i2c.h>
|
|
#include <pca9685/pca9685.h>
|
|
#include <stdio.h>
|
|
|
|
#define ADDR PCA9685_ADDR_BASE
|
|
|
|
#define I2C_BUS 0
|
|
#define SCL_PIN 5
|
|
#define SDA_PIN 4
|
|
|
|
#define PWM_FREQ 500
|
|
|
|
void user_init(void)
|
|
{
|
|
uart_set_baud(0, 115200);
|
|
printf("SDK version:%s\n", sdk_system_get_sdk_version());
|
|
|
|
i2c_init(I2C_BUS, SCL_PIN, SDA_PIN, I2C_FREQ_100K);
|
|
i2c_dev_t dev = {
|
|
.addr = ADDR,
|
|
.bus = I2C_BUS,
|
|
};
|
|
|
|
pca9685_init(&dev);
|
|
|
|
pca9685_set_pwm_frequency(&dev, 1000);
|
|
printf("Freq 1000Hz, real %d\n", pca9685_get_pwm_frequency(&dev));
|
|
|
|
uint16_t val = 0;
|
|
while (true)
|
|
{
|
|
printf("Set ch0 to %d, ch4 to %d\n", val, 4096 - val);
|
|
pca9685_set_pwm_value(&dev, 0, val);
|
|
pca9685_set_pwm_value(&dev, 4, 4096 - val);
|
|
|
|
if (val++ == 4096)
|
|
val = 0;
|
|
}
|
|
}
|