arduino/esp8266
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Move i2c files into core, fix some issues with i2c

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This commit is contained in:
Ivan Grokhotkov 2015-01-21 04:13:18 +03:00
parent 2f39f82954
commit ee35484577
2 changed files with 29 additions and 10 deletions
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39
libraries/Wire/utility/i2c.cpp → cores/esp8266/i2c.cpp
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@ -33,20 +33,29 @@ static uint8_t s_sda_pin = 0;
static uint8_t s_scl_pin = 2;
static uint32_t s_i2c_delay = 5;
static inline void i2c_digital_write(int pin, int val)
{
uint32_t mask = 1 << pin;
if (val)
GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, mask);
else
GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, mask);
}
static inline void i2c_set(int sda, int scl)
{
digitalWrite(s_sda_pin, sda);
digitalWrite(s_scl_pin, scl);
i2c_digital_write(s_sda_pin, sda);
i2c_digital_write(s_scl_pin, scl);
}
static inline void i2c_set_sda(int sda)
{
digitalWrite(s_sda_pin, sda);
i2c_digital_write(s_sda_pin, sda);
}
static inline void i2c_set_scl(int scl)
{
digitalWrite(s_scl_pin, scl);
i2c_digital_write(s_scl_pin, scl);
}
static inline uint8_t i2c_get_sda()
@ -54,6 +63,12 @@ static inline uint8_t i2c_get_sda()
return GPIO_INPUT_GET(GPIO_ID_PIN(s_sda_pin));
}
static inline uint8_t i2c_get_scl()
{
return GPIO_INPUT_GET(GPIO_ID_PIN(s_scl_pin));
}
static inline void i2c_wait()
{
delayMicroseconds(5);
@ -70,8 +85,8 @@ 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);
pinMode(ESP_PINS_OFFSET + sda_pin, OUTPUT_OPEN_DRAIN);
pinMode(ESP_PINS_OFFSET + scl_pin, OUTPUT_OPEN_DRAIN);
i2c_set(1, 1);
i2c_wait();
}
@ -79,8 +94,8 @@ void i2c_init(int sda_pin, int scl_pin)
void i2c_release()
{
pinMode(s_sda_pin, INPUT);
pinMode(s_scl_pin, INPUT);
pinMode(ESP_PINS_OFFSET + s_sda_pin, INPUT);
pinMode(ESP_PINS_OFFSET + s_scl_pin, INPUT);
}
void i2c_start()
@ -142,6 +157,7 @@ uint8_t i2c_read(void)
i2c_set_scl(0);
i2c_wait();
}
return result;
}
@ -167,11 +183,14 @@ size_t i2c_master_read_from(int address, uint8_t* data, size_t size, bool sendSt
uint8_t* end = data + size;
for (;data != end; ++data )
{
i2c_set_sda(1);
pinMode(ESP_PINS_OFFSET + s_sda_pin, INPUT);
*data = i2c_read();
pinMode(ESP_PINS_OFFSET + s_sda_pin, OUTPUT_OPEN_DRAIN);
if (data == end - 1)
i2c_set_ack(1);
else
i2c_set_ack(0);
else
i2c_set_ack(1);
}
if (sendStop)
i2c_stop();

0
libraries/Wire/utility/i2c.h → cores/esp8266/i2c.h
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