1 /*!
2 * \file sx1509.c
3 *
4 * \brief SX1509 IO expander driver implementation
5 *
6 * \copyright Revised BSD License, see section \ref LICENSE.
7 *
8 * \code
9 * ______ _
10 * / _____) _ | |
11 * ( (____ _____ ____ _| |_ _____ ____| |__
12 * \____ \| ___ | (_ _) ___ |/ ___) _ \
13 * _____) ) ____| | | || |_| ____( (___| | | |
14 * (______/|_____)_|_|_| \__)_____)\____)_| |_|
15 * (C)2013-2017 Semtech
16 *
17 * \endcode
18 *
19 * \author Miguel Luis ( Semtech )
20 *
21 * \author Gregory Cristian ( Semtech )
22 */
23 #include <stdbool.h>
24 #include "utilities.h"
25 #include "i2c.h"
26 #include "sx1509.h"
27
28 extern I2c_t I2c;
29
30 static uint8_t I2cDeviceAddr = 0;
31
32 static bool SX1509Initialized = false;
33
SX1509Init(void)34 void SX1509Init( void )
35 {
36 if( SX1509Initialized == false )
37 {
38 SX1509SetDeviceAddr( SX1509_I2C_ADDRESS );
39 SX1509Initialized = true;
40
41 SX1509Reset( );
42 }
43 }
44
SX1509Reset()45 LmnStatus_t SX1509Reset( )
46 {
47 if( SX1509Write( RegReset, 0x12 ) == LMN_STATUS_OK )
48 {
49 if( SX1509Write( RegReset, 0x34 ) == LMN_STATUS_OK )
50 {
51 return LMN_STATUS_OK;
52 }
53 }
54 return LMN_STATUS_ERROR;
55 }
56
SX1509Write(uint8_t addr,uint8_t data)57 LmnStatus_t SX1509Write( uint8_t addr, uint8_t data )
58 {
59 return SX1509WriteBuffer( addr, &data, 1 );
60 }
61
SX1509WriteBuffer(uint8_t addr,uint8_t * data,uint8_t size)62 LmnStatus_t SX1509WriteBuffer( uint8_t addr, uint8_t *data, uint8_t size )
63 {
64 return I2cWriteMemBuffer( &I2c, I2cDeviceAddr << 1, addr, data, size );
65 }
66
SX1509Read(uint8_t addr,uint8_t * data)67 LmnStatus_t SX1509Read( uint8_t addr, uint8_t *data )
68 {
69 return SX1509ReadBuffer( addr, data, 1 );
70 }
71
SX1509ReadBuffer(uint8_t addr,uint8_t * data,uint8_t size)72 LmnStatus_t SX1509ReadBuffer( uint8_t addr, uint8_t *data, uint8_t size )
73 {
74 return I2cReadMemBuffer( &I2c, I2cDeviceAddr << 1, addr, data, size );
75 }
76
SX1509SetDeviceAddr(uint8_t addr)77 void SX1509SetDeviceAddr( uint8_t addr )
78 {
79 I2cDeviceAddr = addr;
80 }
81
SX1509GetDeviceAddr(void)82 uint8_t SX1509GetDeviceAddr( void )
83 {
84 return I2cDeviceAddr;
85 }
86
