sakura fan / SakuraIO

SAKURA Internet IoT Beta Communication Module Library for mbed

Dependents:   SakuraIO_Standard SakuraIO_FirmwareUpdate

SakuraIO_I2C.cpp@0:f3b80b2bdb14, 2016-11-13 (annotated)

Committer:
sakurafan
Date:
Sun Nov 13 06:52:34 2016 +0000
Revision:
0:f3b80b2bdb14
1st ported build;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sakurafan 0:f3b80b2bdb14 1 #include "mbed.h"
sakurafan 0:f3b80b2bdb14 2 #include "SakuraIO.h"
sakurafan 0:f3b80b2bdb14 3 #include "debug.h"
sakurafan 0:f3b80b2bdb14 4
sakurafan 0:f3b80b2bdb14 5 #define SAKURAIO_SLAVE_ADDR (0x4F << 1)
sakurafan 0:f3b80b2bdb14 6
sakurafan 0:f3b80b2bdb14 7 #define MODE_IDLE 0x00
sakurafan 0:f3b80b2bdb14 8 #define MODE_WRITE 0x01
sakurafan 0:f3b80b2bdb14 9 #define MODE_READ 0x02
sakurafan 0:f3b80b2bdb14 10
sakurafan 0:f3b80b2bdb14 11 void SakuraIO_I2C::begin(){
sakurafan 0:f3b80b2bdb14 12 mode = MODE_IDLE;
sakurafan 0:f3b80b2bdb14 13 }
sakurafan 0:f3b80b2bdb14 14
sakurafan 0:f3b80b2bdb14 15 void SakuraIO_I2C::end(){
sakurafan 0:f3b80b2bdb14 16 switch(mode){
sakurafan 0:f3b80b2bdb14 17 case MODE_WRITE:
sakurafan 0:f3b80b2bdb14 18 _i2c.stop();
sakurafan 0:f3b80b2bdb14 19 break;
sakurafan 0:f3b80b2bdb14 20 case MODE_READ:
sakurafan 0:f3b80b2bdb14 21 while (_length > 0) {
sakurafan 0:f3b80b2bdb14 22 _length --;
sakurafan 0:f3b80b2bdb14 23 _i2c.read(_length > 0 ? 1 : 0);
sakurafan 0:f3b80b2bdb14 24 }
sakurafan 0:f3b80b2bdb14 25 _i2c.stop();
sakurafan 0:f3b80b2bdb14 26 break;
sakurafan 0:f3b80b2bdb14 27 }
sakurafan 0:f3b80b2bdb14 28
sakurafan 0:f3b80b2bdb14 29 mode = MODE_IDLE;
sakurafan 0:f3b80b2bdb14 30 }
sakurafan 0:f3b80b2bdb14 31
sakurafan 0:f3b80b2bdb14 32 void SakuraIO_I2C::sendByte(uint8_t data){
sakurafan 0:f3b80b2bdb14 33 if(mode != MODE_WRITE){
sakurafan 0:f3b80b2bdb14 34 dbg("beginTr\r\n");
sakurafan 0:f3b80b2bdb14 35 _i2c.start();
sakurafan 0:f3b80b2bdb14 36 _i2c.write(SAKURAIO_SLAVE_ADDR);
sakurafan 0:f3b80b2bdb14 37 mode = MODE_WRITE;
sakurafan 0:f3b80b2bdb14 38 }
sakurafan 0:f3b80b2bdb14 39 dbg("Write=%02x\r\n", data);
sakurafan 0:f3b80b2bdb14 40 _i2c.write(data);
sakurafan 0:f3b80b2bdb14 41 }
sakurafan 0:f3b80b2bdb14 42
sakurafan 0:f3b80b2bdb14 43
sakurafan 0:f3b80b2bdb14 44 uint8_t SakuraIO_I2C::startReceive(uint8_t length){
sakurafan 0:f3b80b2bdb14 45 if(mode != MODE_IDLE){
sakurafan 0:f3b80b2bdb14 46 dbg("endTransmission\r\n");
sakurafan 0:f3b80b2bdb14 47 _i2c.stop();
sakurafan 0:f3b80b2bdb14 48 }
sakurafan 0:f3b80b2bdb14 49 dbg("requestForm=%d\r\n", length);
sakurafan 0:f3b80b2bdb14 50 _length = length;
sakurafan 0:f3b80b2bdb14 51 _i2c.start();
sakurafan 0:f3b80b2bdb14 52 _i2c.write(SAKURAIO_SLAVE_ADDR | 1);
sakurafan 0:f3b80b2bdb14 53 mode = MODE_READ;
sakurafan 0:f3b80b2bdb14 54 return 0;
sakurafan 0:f3b80b2bdb14 55 }
sakurafan 0:f3b80b2bdb14 56
sakurafan 0:f3b80b2bdb14 57 uint8_t SakuraIO_I2C::receiveByte(){
sakurafan 0:f3b80b2bdb14 58 return receiveByte(false);
sakurafan 0:f3b80b2bdb14 59 }
sakurafan 0:f3b80b2bdb14 60
sakurafan 0:f3b80b2bdb14 61 uint8_t SakuraIO_I2C::receiveByte(bool stop){
sakurafan 0:f3b80b2bdb14 62 uint8_t ret = 0;
sakurafan 0:f3b80b2bdb14 63 if (_length > 0) {
sakurafan 0:f3b80b2bdb14 64 _length --;
sakurafan 0:f3b80b2bdb14 65 ret = _i2c.read(_length > 0 ? 1 : 0);
sakurafan 0:f3b80b2bdb14 66 }
sakurafan 0:f3b80b2bdb14 67 if(stop){
sakurafan 0:f3b80b2bdb14 68 end();
sakurafan 0:f3b80b2bdb14 69 // _i2c.stop();
sakurafan 0:f3b80b2bdb14 70 // mode = MODE_IDLE;
sakurafan 0:f3b80b2bdb14 71 }
sakurafan 0:f3b80b2bdb14 72 dbg("Read=%d\r\n", ret);
sakurafan 0:f3b80b2bdb14 73 return ret;
sakurafan 0:f3b80b2bdb14 74 }
sakurafan 0:f3b80b2bdb14 75
sakurafan 0:f3b80b2bdb14 76 SakuraIO_I2C::SakuraIO_I2C (I2C &i2c) : _i2c(i2c) {
sakurafan 0:f3b80b2bdb14 77 mode = MODE_IDLE;
sakurafan 0:f3b80b2bdb14 78 }
sakurafan 0:f3b80b2bdb14 79
sakurafan 0:f3b80b2bdb14 80 SakuraIO_I2C::SakuraIO_I2C (PinName sda, PinName scl) : _i2c(sda, scl) {
sakurafan 0:f3b80b2bdb14 81 mode = MODE_IDLE;
sakurafan 0:f3b80b2bdb14 82 }