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I2C bus upgrade (#432)

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Zaltora 2017-09-01 06:29:32 -03:00 • committed by Ruslan V. Uss
parent d100f42b1f
commit b83c2629b9
56 changed files with 909 additions and 804 deletions
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8
extras/pcf8591/pcf8591.c
View file

@ -1,22 +1,20 @@
#include <stddef.h>
#include <stdint.h>
#include <i2c/i2c.h>
#include "pcf8591.h"
/**
* CAUTION: PLEASE SET I2C_FREQUENCY_400K IS 'false' IN 'i2c.h' FILE
* CAUTION: PLEASE SET LOW FREQUENCY
*/
#define PCF8591_CTRL_REG_READ 0x03
uint8_t
pcf8591_read(uint8_t addr, uint8_t analog_pin)
uint8_t pcf8591_read(i2c_dev_t* dev, uint8_t analog_pin)
{
uint8_t res = 0;
uint8_t control_reg = PCF8591_CTRL_REG_READ & analog_pin;
i2c_slave_read(addr, &control_reg, &res, 1);
i2c_slave_read(dev->bus, dev->addr, &control_reg, &res, 1);
return res;
}

6
extras/pcf8591/pcf8591.h
View file

@ -9,6 +9,8 @@
#ifndef _EXTRAS_PCF8591_H_
#define _EXTRAS_PCF8591_H_
#include <i2c/i2c.h>
#ifdef __cplusplus
extern "C"
{
@ -20,7 +22,7 @@ extern "C"
#define PCF8591_DEFAULT_ADDRESS 0x48
void pcf8591_init(void);
void pcf8591_init(void); //FIXME : library incomplete ?
/**
* Read input value of an analog pin.
@ -32,7 +34,7 @@ void pcf8591_init(void);
* 3 - AIN3
* @return analog value
*/
uint8_t pcf8591_read(uint8_t addr, uint8_t analog_pin);
uint8_t pcf8591_read(i2c_dev_t* dev, uint8_t analog_pin);
#ifdef __cplusplus