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Wire library: fixed Master-mode

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This commit is contained in:
Cristian Maglie
2011-11-06 14:00:02 +01:00
parent 1b4cd35e9d
commit eef7c78506
3 changed files with 127 additions and 45 deletions
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38
hardware/sam/libraries/Wire/Wire.h
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@ -21,15 +21,15 @@
#ifndef DueWire_h
#define DueWire_h
#include <inttypes.h>
#include "Stream.h"
#include "twi.h"
#include "variant.h"
#define BUFFER_LENGTH 32
class DueWire: public Stream {
public:
DueWire(Twi *);
DueWire(Twi *twi, void(*begin_cb)(void));
void begin();
void begin(uint8_t);
void begin(int);
@ -70,22 +70,38 @@ private:
void (*onRequestCallback)(void);
void (*onReceiveCallback)(int);
// Called before initialization
void (*onBeginCallback)(void);
// TWI instance
Twi *twi;
// TWI state
static const uint8_t UNINITIALIZED = 0;
static const uint8_t MASTER_IDLE = 1;
static const uint8_t MASTER_SEND = 2;
static const uint8_t MASTER_RECV = 3;
static const uint8_t SLAVE_IDLE = 4;
static const uint8_t SLAVE_RECV = 5;
static const uint8_t SLAVE_SEND = 6;
uint8_t status;
enum DueWireStatus {
UNINITIALIZED,
MASTER_IDLE,
MASTER_SEND,
MASTER_RECV,
SLAVE_IDLE,
SLAVE_RECV,
SLAVE_SEND
};
DueWireStatus status;
// TWI clock frequency
static const uint32_t TWI_CLOCK = 100000;
// Timeouts (
static const uint32_t RECV_TIMEOUT = 100000;
static const uint32_t XMIT_TIMEOUT = 100000;
};
#if WIRE_INTERFACES_COUNT > 0
extern DueWire Wire;
extern DueWire Wire2;
#endif
#if WIRE_INTERFACES_COUNT > 1
extern DueWire Wire1;
#endif
#endif