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Remove i2c.c

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replaced with i2c.cpp
This commit is contained in:
Ivan Grokhotkov 2014-12-18 18:46:45 +03:00
parent 77af5da58f
commit d076e9e322
1 changed files with 0 additions and 175 deletions
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175
libraries/Wire/utility/i2c.c
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@ -1,175 +0,0 @@
#include <Arduino.h>
#include "i2c.h"
#include "ets_sys.h"
#include "osapi.h"
#include "gpio.h"
size_t ets_printf(const char*, ...);
#define DEBUGV ets_printf
static uint8_t s_sda_pin = 0;
static uint8_t s_scl_pin = 2;
static inline void i2c_set(int sda, int scl)
{
digitalWrite(s_sda_pin, sda);
digitalWrite(s_scl_pin, scl);
}
static inline void i2c_set_sda(int sda)
{
digitalWrite(s_sda_pin, sda);
}
static inline void i2c_set_scl(int scl)
{
digitalWrite(s_scl_pin, scl);
}
static inline uint8_t i2c_get_sda()
{
return GPIO_INPUT_GET(GPIO_ID_PIN(s_sda_pin));
}
static inline void i2c_wait()
{
delayMicroseconds(5);
}
void i2c_init(int sda_pin, int scl_pin)
{
s_sda_pin = sda_pin;
s_scl_pin = scl_pin;
pinMode(sda_pin, OUTPUT_OPEN_DRAIN);
pinMode(scl_pin, OUTPUT_OPEN_DRAIN);
i2c_set(1, 1);
i2c_wait();
}
void i2c_release()
{
pinMode(s_sda_pin, INPUT);
pinMode(s_scl_pin, INPUT);
}
void i2c_start()
{
i2c_set(1, 1);
i2c_wait();
i2c_set_sda(0);
i2c_wait();
i2c_wait();
i2c_set_scl(0);
i2c_wait();
}
void i2c_stop()
{
i2c_wait();
i2c_set_scl(1);
i2c_wait();
i2c_set_sda(1);
i2c_wait();
}
void i2c_set_ack(int ack)
{
i2c_set_sda(!ack);
i2c_wait();
i2c_set_scl(1);
i2c_wait();
i2c_set_scl(0);
i2c_wait();
i2c_set_sda(0);
i2c_wait();
}
int i2c_get_ack()
{
i2c_wait();
i2c_set_scl(1);
i2c_wait();
int result = i2c_get_sda();
i2c_set_scl(0);
i2c_wait();
i2c_set_sda(0);
i2c_wait();
return result;
}
uint8_t i2c_read(void)
{
uint8_t result = 0;
for (int i = 7; i >= 0; --i)
{
i2c_wait();
i2c_set_scl(1);
i2c_wait();
result <<= 1;
result |= i2c_get_sda();
i2c_wait(); // <- remove
i2c_set_scl(0);
i2c_wait();
}
}
void i2c_write(uint8_t val)
{
for (int i = 7; i >= 0; --i)
{
i2c_set_sda((val >> i) & 1);
i2c_wait();
i2c_set_scl(1);
i2c_wait();
i2c_set_scl(0);
i2c_wait();
}
i2c_set_sda(1);
}
size_t i2c_master_read_from(int address, uint8_t* data, size_t size, bool sendStop)
{
DEBUGV("\r\nrf: %02x %08x %d\r\n", address, data, size);
i2c_start();
i2c_write(address << 1 | 1);
int ack = i2c_get_ack();
uint8_t* end = data + size;
for (;data != end; ++data )
{
*data = i2c_read();
DEBUGV("r%d ", *data);
if (data == end - 1)
i2c_set_ack(1);
else
i2c_set_ack(0);
}
DEBUGV("s\r\n", *data);
if (sendStop)
i2c_stop();
return size;
}
size_t i2c_master_write_to(int address, const uint8_t* data, size_t size, bool sendStop)
{
i2c_start();
i2c_write(address << 1);
int ack = i2c_get_ack();
const uint8_t* end = data + size;
for (;data != end; ++data )
{
i2c_write(*data);
ack = i2c_get_ack();
}
if (sendStop)
i2c_stop();
return size;
}