Mike Fruge
Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Diff: OneWire_Bridge/DS28E17/ds28e17.cpp
- Revision:
- 7:78a8857b3810
- Parent:
- 4:ca27db159b10
- Child:
- 13:d1bdb03703de
diff -r 1faafa0b3cd7 -r 78a8857b3810 OneWire_Bridge/DS28E17/ds28e17.cpp
--- a/OneWire_Bridge/DS28E17/ds28e17.cpp Tue Feb 09 20:08:51 2016 +0000
+++ b/OneWire_Bridge/DS28E17/ds28e17.cpp Fri Feb 12 22:56:13 2016 +0000
@@ -43,32 +43,16 @@
**********************************************************************/
-#include "ds28e17.h"
-
+#include "ds28e17.h"
-#define OW_ENABLE_DELAY 3
-#define CMD_I2C_WRITE_W_STOP 0x4B
-#define CMD_I2C_WRITE_NO_STOP 0x5A
-#define CMD_I2C_WRITE_ONLY 0x69
-#define CMD_I2C_WRITE_ONLY_W_STOP 0x78
-#define CMD_I2C_READ_W_STOP 0x87
-#define CMD_I2C_WRITE_READ_W_STOP 0x2D
-#define CMD_WRITE_CONFIG_REG 0xD2
-#define CMD_READ_CONFIG_REG 0xE1
-#define CMD_DISABLE_OW_MODE 0x96
-#define CMD_ENABLE_SLEEP_MODE 0x1E
-#define CMD_READ_DEVICE_REV 0xC3
-#define POLL_LIMIT 10000
-
-
-uint16_t Ds28e17::_oddparity[] = { 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 };
+const uint16_t Ds28e17::_oddparity[] = { 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 };
//*********************************************************************
-Ds28e17::Ds28e17(OneWireInterface *p_owm)
+Ds28e17::Ds28e17(OneWireInterface &owm)
+:_p_owm(&owm), _owm_owner(false)
{
- _p_owm = p_owm;
- _owm_owner = false;
+
}
@@ -84,15 +68,73 @@
//*********************************************************************
bool Ds28e17::I2C_WriteDataWithStop(uint8_t I2C_addr, uint8_t length,
- uint8_t *data, uint8_t status,
- uint8_t wr_status)
+ uint8_t *data, uint8_t &status,
+ uint8_t &wr_status)
{
bool rtn_val = false;
- /*uint8_t send_cnt = 0;
- uint8_t i;
- uint16_t poll_count = 0;
- uint8_t send_block[0xFF];*/
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ //seed the crc
+ _crc16 = 0;
+
+ // Form the 1-Wire Packet
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_WRITE_W_STOP;
+ docrc16(send_block[send_cnt++]);
+
+ // I2C Address
+ send_block[send_cnt] = I2C_addr;
+ docrc16(send_block[send_cnt++]);
+
+ // Length field
+ send_block[send_cnt] = length;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the write data
+ for (idx = 0; idx < length; idx++)
+ {
+ send_block[send_cnt] = data[idx];
+ docrc16(send_block[send_cnt++]);
+ }
+
+ // Form the CRC16
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = ((uint8_t)(_crc16 & 0xFF));
+ send_block[send_cnt++] = ((uint8_t)((_crc16 >> 8) & 0xFF));
+
+ // Send Packet
+ _p_owm->OWWriteBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+ if(poll_count < POLL_LIMIT)
+ {
+ //Read Status
+ status = _p_owm->OWReadByte();
+
+ //Read Write Status
+ wr_status = _p_owm->OWReadByte();
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ }
+ else
+ {
+ rtn_val = false;
+ }
return(rtn_val);
}
@@ -100,31 +142,209 @@
//*********************************************************************
bool Ds28e17::I2C_WriteDataNoStop(uint8_t I2C_addr, uint8_t length,
- uint8_t *data, uint8_t status,
- uint8_t wr_status)
+ uint8_t *data, uint8_t &status,
+ uint8_t &wr_status)
{
bool rtn_val = false;
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ // seed the crc
+ _crc16 = 0;
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_WRITE_NO_STOP;
+ docrc16(send_block[send_cnt++]);
+
+ // I2C Address
+ send_block[send_cnt] = I2C_addr;
+ docrc16(send_block[send_cnt++]);
+
+ // Length field
+ send_block[send_cnt] = length;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the write data
+ for(idx = 0; idx < length; idx++)
+ {
+ send_block[send_cnt] = data[idx];
+ docrc16(send_block[send_cnt++]);
+ }
+
+ // Form the CRC16
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = ((uint8_t)(_crc16 & 0xFF));
+ send_block[send_cnt++] = ((uint8_t)((_crc16 >> 8) & 0xFF));
+
+ // Send Packet
+ _p_owm->OWBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+ if(poll_count < POLL_LIMIT)
+ {
+ //Read Status
+ status = _p_owm->OWReadByte();
+
+ //Read Write Status
+ wr_status = _p_owm->OWReadByte();
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
return(rtn_val);
}
//*********************************************************************
bool Ds28e17::I2C_WriteDataOnly(uint8_t length, uint8_t *data,
- uint8_t status, uint8_t wr_status)
+ uint8_t &status, uint8_t &wr_status)
{
bool rtn_val = false;
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ // seed the crc
+ _crc16 = 0;
+
+ // Form the 1-Wire Packet
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_WRITE_ONLY;
+ docrc16(send_block[send_cnt++]);
+
+ // Length field
+ send_block[send_cnt] = length;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the write data
+ for (idx = 0; idx < length; idx++)
+ {
+ send_block[send_cnt] = data[idx];
+ docrc16(send_block[send_cnt++]);
+ }
+
+ // Form the CRC16\
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = (_crc16 & 0xFF);
+ send_block[send_cnt++] = ((_crc16 >> 8) & 0xFF);
+
+ // Send Packet
+ _p_owm->OWBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+
+ if(poll_count < POLL_LIMIT)
+ {
+ // Read Status
+ status = _p_owm->OWReadByte();
+
+ // Read Write Status
+ wr_status = _p_owm->OWReadByte();
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+
return(rtn_val);
}
//*********************************************************************
bool Ds28e17::I2C_WriteDataOnlyWithStop(uint8_t length, uint8_t *data,
- uint8_t status, uint8_t wr_status)
+ uint8_t &status, uint8_t &wr_status)
{
bool rtn_val = false;
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ //seed the crc
+ _crc16 = 0;
+
+ // Form the 1-Wire Packet
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_WRITE_ONLY_W_STOP;
+ docrc16(send_block[send_cnt++]);
+
+ // Length field
+ send_block[send_cnt] = length;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the write data
+ for (idx = 0; idx < length; idx++)
+ {
+ send_block[send_cnt] = data[idx];
+ docrc16(send_block[send_cnt++]);
+ }
+
+ // Form the CRC16
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = (_crc16 & 0xFF);
+ send_block[send_cnt++] = ((_crc16 >> 8) & 0xFF);
+
+ // Send Packet
+ _p_owm->OWBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+ if(poll_count < POLL_LIMIT)
+ {
+ // Read Status
+ status = _p_owm->OWReadByte();
+
+ // Read Write Status
+ wr_status = _p_owm->OWReadByte();
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
return(rtn_val);
}
@@ -132,23 +352,306 @@
//*********************************************************************
bool Ds28e17::I2C_WriteReadDataWithStop(uint8_t I2C_addr, uint8_t length,
uint8_t *data, uint8_t nu_bytes_read,
- uint8_t status, uint8_t wr_status,
+ uint8_t &status, uint8_t &wr_status,
uint8_t *read_data)
{
bool rtn_val = false;
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ //seed the crc
+ _crc16 = 0;
+
+ // Form the 1-Wire Packet
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_WRITE_READ_W_STOP;
+ docrc16(send_block[send_cnt++]);
+
+ // I2C Address
+ send_block[send_cnt] = I2C_addr;
+ docrc16(send_block[send_cnt++]);
+
+ // Length field
+ send_block[send_cnt] = length;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the write data
+ for (idx = 0; idx < length; idx++)
+ {
+ send_block[send_cnt] = data[idx];
+ docrc16(send_block[send_cnt++]);
+ }
+
+ // # of bytes to Read field
+ send_block[send_cnt] = nu_bytes_read;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the CRC16
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = (_crc16 & 0xFF);
+ send_block[send_cnt++] = ((_crc16 >> 8) & 0xFF);
+
+ // Send Packet
+ _p_owm->OWBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+ if(poll_count < POLL_LIMIT)
+ {
+ // Read Status
+ status = _p_owm->OWReadByte();
+
+ // Read Write Status
+ wr_status = _p_owm->OWReadByte();
+
+ //seed the crc for read bytes
+ _crc16 = 0;
+
+ // Read Data
+ for(idx = 0; idx < nu_bytes_read; idx++)
+ {
+ read_data[idx] = _p_owm->OWReadByte();
+ docrc16(read_data[idx]);
+ }
+
+ /********** TODO **********/
+ // need to check datasheet, below was left commented for a reason.
+ // need to see why
+
+ // Read the CRC16
+ //docrc16(OWReadByte()); //Receive first crc16 byte
+ //docrc16(OWReadByte()); //Receive second crc16 byte
+
+ // check CRC16
+ //if (CRC16 != 0xB001)
+ // return false;
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
return(rtn_val);
}
//*********************************************************************
bool Ds28e17::I2C_ReadDataWithStop(uint8_t I2C_addr, uint8_t nu_bytes_read,
- uint8_t status, uint8_t *read_data)
+ uint8_t &status, uint8_t *read_data)
{
bool rtn_val = false;
+ size_t send_cnt = 0;
+ size_t idx = 0;
+ uint32_t poll_count = 0;
+ uint8_t send_block[0xff];
+
+ if(_p_owm->OWMatchROM())
+ {
+ //seed the crc for transmit bytes
+ _crc16 = 0;
+
+ // Form the 1-Wire Packet to send
+
+ // I2C Write Data with Stop command
+ send_block[send_cnt] = CMD_I2C_READ_W_STOP;
+ docrc16(send_block[send_cnt++]);
+
+ // I2C Address
+ send_block[send_cnt] = I2C_addr;
+ docrc16(send_block[send_cnt++]);
+
+ // # of bytes to Read field
+ send_block[send_cnt] = nu_bytes_read;
+ docrc16(send_block[send_cnt++]);
+
+ // Form the CRC16
+ _crc16 = _crc16^0xFFFF;
+ send_block[send_cnt++] = (_crc16 & 0xFF);
+ send_block[send_cnt++] = ((_crc16 >> 8) & 0xFF);
+
+ // Send Packet
+ _p_owm->OWBlock(send_block, send_cnt);
+
+ // Poll for Zero 1-Wire bit and return if an error occurs
+ while(_p_owm->OWReadBit() && (poll_count++ < POLL_LIMIT));
+
+ if(poll_count < POLL_LIMIT)
+ {
+ // Read Status
+ status = _p_owm->OWReadByte();
+
+ //seed the crc for read bytes
+ _crc16 = 0;
+
+ // Read Data
+ for(idx = 0; idx < nu_bytes_read; idx++)
+ {
+ read_data[idx] = _p_owm->OWReadByte();
+ docrc16(read_data[idx]);
+ }
+
+ /********** TODO **********/
+ // need to check datasheet, below was left commented for a reason.
+ // need to see why
+
+ // Read the CRC16
+ //docrc16(OWReadByte()); //Receive first crc16 byte
+ //docrc16(OWReadByte()); //Receive second crc16 byte
+
+ // check CRC16
+ //if (CRC16 != 0xB001)
+ // return false;
+
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
return(rtn_val);
}
//*********************************************************************
+bool Ds28e17::WriteConfigReg(uint8_t data)
+{
+ bool rtn_val = false;
+
+ if(_p_owm->OWMatchROM())
+ {
+ // Send CMD and Data
+ _p_owm->OWWriteByte(CMD_WRITE_CONFIG_REG);
+ _p_owm->OWWriteByte(data);
+ _i2c_speed = data & 0x03; // Save off _i2c_speed setting to be used by other functions
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ return(rtn_val);
+}
+
+
+//*********************************************************************
+uint8_t Ds28e17::ReadConfigReg(void)
+{
+ uint8_t rtn_val = false;
+
+ if(_p_owm->OWMatchROM())
+ {
+ // Send CMD and receive Data
+ _p_owm->OWWriteByte(CMD_READ_CONFIG_REG);
+ rtn_val = _p_owm->OWReadByte();
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ return(rtn_val);
+}
+
+
+//*********************************************************************
+bool Ds28e17::DisableOWMode()
+{
+ bool rtn_val = false;
+
+ if(_p_owm->OWMatchROM())
+ {
+ // Send CMD
+ _p_owm->OWWriteByte(CMD_DISABLE_OW_MODE);
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ return(rtn_val);
+}
+
+
+//*********************************************************************
+bool Ds28e17::EnableSleepMode()
+{
+ bool rtn_val = false;
+
+ if(_p_owm->OWMatchROM())
+ {
+ // Send CMD
+ _p_owm->OWWriteByte(CMD_ENABLE_SLEEP_MODE);
+ rtn_val = true;
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ return(rtn_val);
+}
+
+
+//*********************************************************************
+uint8_t Ds28e17::ReadDeviceRevision(void)
+{
+ uint8_t rtn_val;
+
+ if(_p_owm->OWMatchROM())
+ {
+ // Send CMD and receive Data
+ _p_owm->OWWriteByte(CMD_READ_DEVICE_REV);
+ rtn_val = _p_owm->OWReadByte();
+ }
+ else
+ {
+ rtn_val = false;
+ }
+
+ return(rtn_val);
+}
+
+
+//*********************************************************************
+uint16_t Ds28e17::docrc16(uint16_t data)
+{
+ data = ((data ^ (_crc16 & 0xff)) & 0xff);
+ _crc16 >>= 8;
+
+ if (Ds28e17::_oddparity[data & 0xf] ^ Ds28e17::_oddparity[data >> 4])
+ {
+ _crc16 ^= 0xc001;
+ }
+
+ data <<= 6;
+ _crc16 ^= data;
+ data <<= 1;
+ _crc16 ^= data;
+
+ return _crc16;
+}
+
+