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add pcf8591 lib + example

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This commit is contained in:
thanhpn 2017-04-25 23:57:40 +07:00
parent b982a132ae
commit dbcb707c1c
3 changed files with 50 additions and 39 deletions
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51
examples/pcf8591/main.c
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@ -1,43 +1,36 @@
/*
* 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
#include "espressif/esp_common.h"
#include "esp/uart.h"
#include "FreeRTOS.h"
#include "task.h"
#include "i2c/i2c.h"
#include "pcf8591/pcf8591.h"
#define SCL_PIN 5
#define SDA_PIN 4
#define PWM_FREQ 500
static void measure(void *pvParameters)
{
while (1)
{
vTaskDelay(1000 / portTICK_PERIOD_MS);
printf("Value: %d\n", pcf8591_read(PCF8591_DEFAULT_ADDRESS, 0x03));
}
}
void user_init(void)
{
uart_set_baud(0, 115200);
printf("SDK version:%s\n", sdk_system_get_sdk_version());
// Just some information
printf("\n");
printf("SDK version : %s\n", sdk_system_get_sdk_version());
printf("GIT version : %s\n", GITSHORTREV);
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;
}
xTaskCreate(measure, "measure_task", 256, NULL, 2, NULL);
}