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Driver for PCA9685 + example

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UncleRus 2016-12-19 05:53:07 +05:00
parent 7432c019f7
commit e96fb4242e
5 changed files with 409 additions and 0 deletions
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3
examples/pca9685_pwm/Makefile Normal file
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PROGRAM = pca9685_pwm
EXTRA_COMPONENTS = extras/i2c extras/pca9685
include ../../common.mk

43
examples/pca9685_pwm/main.c Normal file
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/*
* 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 0x40
#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(SCL_PIN, SDA_PIN);
pca9685_init(ADDR);
pca9685_set_pwm_frequency(ADDR, 1000);
printf("Freq 1000Hz, real %d\n", pca9685_get_pwm_frequency(ADDR));
uint16_t val = 0;
while (true)
{
printf("Set ch0 to %d, ch4 to %d\n", val, 4096 - val);
pca9685_set_pwm_value(ADDR, 0, val);
pca9685_set_pwm_value(ADDR, 4, 4096 - val);
if (val++ == 4096)
val = 0;
}
}