void DS18B20_SendID(unsigned char *u8Rom)
{
int i;
OWWriteByte(0x55);
for(i = 0; i < 8; i++)
{
OWWriteByte(u8Rom[i]);
}
}
int do_onewire(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned short val;
int result;
int i;
unsigned char ow_id[6];
char str[32];
/*
* Clear 1-wire bit (open drain with pull-up)
*/
val = in_be16((void*)(CONFIG_SYS_FPGA_BASE_ADDR +
CONFIG_SYS_FPGA_MODE));
val &= ~CONFIG_SYS_FPGA_MODE_1WIRE; /* clear 1-wire bit */
out_be16((void*)(CONFIG_SYS_FPGA_BASE_ADDR +
CONFIG_SYS_FPGA_MODE), val);
result = OWTouchReset();
if (result != 0)
puts("No 1-wire device detected!\n");
OWWriteByte(0x33); /* send read rom command */
OWReadByte(); /* skip family code ( == 0x01) */
for (i = 0; i < 6; i++)
ow_id[i] = OWReadByte();
OWReadByte(); /* read crc */
sprintf(str, "%02X%02X%02X%02X%02X%02X",
ow_id[0], ow_id[1], ow_id[2], ow_id[3], ow_id[4], ow_id[5]);
printf("Setting environment variable 'ow_id' to %s\n", str);
setenv("ow_id", str);
return 0;
}
uint8_t readTempData_ds18b20(int *temperature) {
if(resetSensor() != 0){
return 1;
}
OWWriteByte(0xCC); //skip rom
OWWriteByte(0x44); //convert T
_delay_ms(800);
if(resetSensor() != 0){
return 1;
}
OWWriteByte(0xCC); //skip rom
OWWriteByte(0xBE); //read scratchpad
*temperature = readScratchpad(2);
//*temperature = 0xFC90;
return 0;
}
void DS18B20_Convert(uint8 *pID)//温度转换
{
OWReset(); //复位
// OWWriteByte(0xcc);
DS18B20_SendID(pID);
OWWriteByte(0x44);//发出转换命令
}
unsigned int DS18B20_ReadTemperature(uint8 *pID)
{
unsigned int Data;
OWReset(); //复位
DS18B20_SendID(pID);
OWWriteByte(0xbe); //读温度
Data = OWReadByte();
Data += (unsigned int)(OWReadByte() << 8);
return Data;
}
// legge il codice del SINGOLO dispositivo sul bus
// e lo memorizza nell'array ID passato come argomento
void OWReadRom(unsigned char *ID)
{
OWReset(); // resetto la linea one-wire
OWWriteByte(OW_READ_ROM); // invio il comando readrom, che si può usare solo se sulla linea c'è una sola sonda
for(unsigned char a=0; a<8; a++)// ciclo per leggere gli 8 bytes restituiti dal dispositivo
{
// eseguo la lettura del byte a-esimo:
ID[a]=OWReadByte();
}
}
unsigned char *DS18B20_ReadID(unsigned char *u8Rom)
{
int i;
OWReset(); //复位
OWWriteByte(0x33);
for(i = 0; i < 8; i++)
{
u8Rom[i] = OWReadByte();
}
return u8Rom;
}
//-----------------------------------------------------------------------------
// Read and return the page data and SHA-1 message authentication code (MAC)
// from a DS2432.
//
int ReadPageMAC(int page, unsigned char *page_data, unsigned char *mac)
{
int i;
unsigned short data_crc16, mac_crc16;
// set the speed to 'standard'
// select the device
if (OWTouchReset()) // Reset the 1-Wire bus
return 0; // Return if no devices found
OWWriteByte(0xCC); // Send Skip ROM command to select single device
// read the page
OWWriteByte(0xA5); // Read Authentication command
OWWriteByte((page << 5) & 0xFF); // TA1
OWWriteByte(0); // TA2 (always zero for DS2432)
// read the page data
for (i = 0; i < 32; i++)
page_data[i] = OWReadByte();
OWWriteByte(0xFF);
// read the CRC16 of command, address, and data
data_crc16 = OWReadByte();
data_crc16 |= (OWReadByte() << 8);
// delay 2ms for the device MAC computation
// read the MAC
for (i = 0; i < 20; i++)
mac[i] = OWReadByte();
// read CRC16 of the MAC
mac_crc16 = OWReadByte();
mac_crc16 |= (OWReadByte() << 8);
// check CRC16...
return 1;
}
//-----------------------------------------------------------------------------
// Set all devices on 1-Wire to overdrive speed. Return '1' if at least one
// overdrive capable device is detected.
//
int OWOverdriveSkip(unsigned char *data, int data_len)
{
// set the speed to 'standard'
// reset all devices
if (OWTouchReset()) // Reset the 1-Wire bus
return 0; // Return if no devices found
// overdrive skip command
OWWriteByte(0x3C);
// set the speed to 'overdrive'
// do a 1-Wire reset in 'overdrive' and return presence result
return OWTouchReset();
}
int main(void)
{
unsigned int c;
int num=0;
/*
* Initialize UART library, pass baudrate and AVR cpu clock
* with the macro
* UART_BAUD_SELECT() (normal speed mode )
* or
* UART_BAUD_SELECT_DOUBLE_SPEED() ( double speed mode)
*/
//uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
/*
* now enable interrupt, since UART library is interrupt controlled
*/
//sei();
/*
* Transmit string to UART
* The string is buffered by the uart library in a circular buffer
* and one character at a time is transmitted to the UART using interrupts.
* uart_puts() blocks if it can not write the whole string to the circular
* buffer
*/
//uart_puts("String stored in SRAM\n");
/*
* Transmit string from program memory to UART
*/
//uart_puts_P("String stored in FLASH\n");
/*
* Transmit single character to UART
*/
//uart_putc('\r');
/* initialize display, cursor off */
lcd_init(LCD_DISP_ON);
/* clear display and home cursor */
lcd_clrscr();
LED_INIT;
LED_OFF;
unsigned char Buffer_RX[32];
int i;
for(;;)
{
/*
* Get received character from ringbuffer
* uart_getc() returns in the lower byte the received character and
* in the higher byte (bitmask) the last receive error
* UART_NO_DATA is returned when no data is available.
*
*/
//uart_puts_P("Kiss my ass\n");
//c = uart_getc();
c=0;
//uart_puts("TAREK TAHA ===>>> Wireless is Up and Running\n");
lcd_clrscr();
lcd_gotoxy(16-(num++)%16,0);
lcd_puts("<<LCD TEST 1>>\n");
if (OWTouchReset() == 1)
{
lcd_puts("No Pulse found\n");
}
else
{
lcd_puts("Pulse found\n");
OWWriteByte(OW_READ_ROM_CMD);
for (i=0;i<=8;i++)
{
Buffer_RX[i] = OWReadByte();
lcd_putc(Buffer_RX[i]);
}
}
DelayMs(100);
continue;
if ( c & UART_NO_DATA )
{
/*
* no data available from UART
*/
}
else
{
/*
* new data available from UART
* check for Frame or Overrun error
*/
if ( c & UART_FRAME_ERROR )
{
/* Framing Error detected, i.e no stop bit detected */
uart_puts_P("UART Frame Error: ");
}
if ( c & UART_OVERRUN_ERROR )
{
/*
* Overrun, a character already present in the UART UDR register was
* not read by the interrupt handler before the next character arrived,
* one or more received characters have been dropped
*/
uart_puts_P("UART Overrun Error: ");
}
if ( c & UART_BUFFER_OVERFLOW )
{
/*
* We are not reading the receive buffer fast enough,
* one or more received character have been dropped
*/
uart_puts_P("Buffer overflow error: ");
}
/*
* send received character back
*/
if(c=='0')
{
LED_OFF;
uart_puts_P("--->>>Light OFF\n");
}
else
if(c=='1')
{
LED_ON;
uart_puts_P("--->>>Light ON\n");
}
uart_puts_P("Press 0 or 1 to toggle Light\n");
//uart_putc( (unsigned char)c );
}
//delay_ms(100);
uart_puts("TAREK TAHA");
}
}
//--------------------------------------------------------------------------
//! Perform the 1-Wire Search Algorithm on the 1-Wire bus using the existing
//! search state.
//! @return TRUE : device found, ROM number in ROM_NO buffer
//! FALSE : device not found, end of search
//
int OWSearch()
{
int id_bit_number;
int last_zero, rom_byte_number, search_result;
int id_bit, cmp_id_bit;
uchar rom_byte_mask, search_direction;
// initialize for search
id_bit_number = 1;
last_zero = 0;
rom_byte_number = 0;
rom_byte_mask = 1;
search_result = 0;
crc8 = 0;
// if the last call was not the last one
if (!LastDeviceFlag)
{
// 1-Wire reset
if (!OWReset())
{
// reset the search
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
return FALSE;
}
// issue the search command
OWWriteByte(0xF0);
// loop to do the search
do
{
// read a bit and its complement
id_bit = OWReadBit();
cmp_id_bit = OWReadBit();
// check for no devices on 1-wire
if ((id_bit == 1) && (cmp_id_bit == 1))
break;
else
{
// all devices coupled have 0 or 1
if (id_bit != cmp_id_bit)
search_direction = id_bit; // bit write value for search
else
{
// if this discrepancy if before the Last Discrepancy
// on a previous next then pick the same as last time
if (id_bit_number < LastDiscrepancy)
search_direction = ((ROM_NO[rom_byte_number] & rom_byte_mask) > 0);
else
// if equal to last pick 1, if not then pick 0
if (id_bit_number == LastDiscrepancy)
search_direction = 1;
else
search_direction = 0;
// if 0 was picked then record its position in LastZero
if (search_direction == 0)
{
last_zero = id_bit_number;
// check for Last discrepancy in family
if (last_zero < 9)
LastFamilyDiscrepancy = last_zero;
}
}
// set or clear the bit in the ROM byte rom_byte_number
// with mask rom_byte_mask
if (search_direction == 1)
ROM_NO[rom_byte_number] |= rom_byte_mask;
else
ROM_NO[rom_byte_number] &= ~rom_byte_mask;
// serial number search direction write bit
OWWriteBit(search_direction);
// increment the byte counter id_bit_number
// and shift the mask rom_byte_mask
id_bit_number++;
rom_byte_mask <<= 1;
// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
if (rom_byte_mask == 0)
{
docrc8(ROM_NO[rom_byte_number]); // accumulate the CRC
rom_byte_number++;
rom_byte_mask = 1;
}
}
}
while(rom_byte_number < 8); // loop until through all ROM bytes 0-7
// if the search was successful then
if (!((id_bit_number < 65) || (crc8 != 0)))
{
// search successful so set LastDiscrepancy,LastDeviceFlag,search_result
LastDiscrepancy = last_zero;
// check for last device
if (LastDiscrepancy == 0)
LastDeviceFlag = TRUE;
search_result = TRUE;
}
}
// if no device found then reset counters so next 'search' will be like a first
if (!search_result || !ROM_NO[0])
{
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
search_result = FALSE;
}
return search_result;
}
void main(){
setup_oscillator (OSC_8MHZ);
setup_timer_1(T1_DISABLED);
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
// Give indiction that the microcontroller is up and running
for (i=0;i<5;i++){
blink();
}
//On boot interactive mode is on so that the user can use a terminal interface
interactive = 1;
//Main loop starts here...
while(true){ //Waits for a command to come in over the serial port in interactive mode
if (interactive == 1)
printf("Please enter a command (h for help):\n\r");
command = getc();
switch (command){
case 'i': //Turn off interactive mode
printf("Turning Off Interactive...\n\r");
interactive = 0;
printf("Done...\n\r");
break;
case 'r': //Reset DS2482
if (interactive == 1){
printf("Resetting the DS2482\n\r");
}
//Do the Reset
result = ds2482_reset();
if (interactive == 1){
if (result == 1)
printf("...Success...\n\r");
else printf ("...Fail..\n\r");
}
break;
case 'c': //Configure DS2482
//Active pullup should always be selected unless
//there is only a single slave on the 1-Wire line.
//0x01 1WS Disabled, SPU Disabled, 0 NC, APU Active Pullup (Normal Operation for more then one device on onewire bus)
//0x05 1WS Disabled, SPU Active, 0 NC, APU Active Pullup (Strong pullup is commonly used with 1-Wire parasitically powered temperature sensors, eeprom, A/D converters)
if (interactive == 1){
printf("Configuring the DS2482\n\r");
}
//Do the Config
result = ds2482_write_config(0x01);
if (interactive == 1){
if (result == 1)
printf("...Success...\n\r");
else printf ("...Fail..\n\r");
}
break;
case 'R': //Reset One Wire Bus
if (interactive == 1){
printf("Resetting the One Wire\n\r");
}
result = OWreset();
if (interactive == 1){
if (result == 1)
printf("...Success...\n\r");
else printf ("...Fail..\n\r");
}
break;
case 'n': //Read the Network Address
OWreset();
delay_ms(1);
OWWriteByte("33");
//delay_ms(20);
for(i=0; i<=7; i++) {
result = OWReadByte();
printf ("%2X",result);
delay_ms(1);
}
break;
case 's': //Read the OW status register
OWreset();
delay_ms(1);
OWWriteByte(204); //Transmit skip Rom Command CC = 204
OWWriteByte(105); //0x69 Transmit Read RAM command
OWWriteByte(1); //Transmit Read start address
result=OWReadByte();
break;
case 'f': //Fix the floating power switch
OWreset();
OWWriteByte(0xCC);
OWWriteByte(0x6C); //Write Data Command
OWWriteByte(0x31); //Eeprom address but actually gets written to Shadow Ram
OWWriteByte(0xE7); //Value to make PMOD1 SWEN=0 RNAOP=0
//Copy the shadow Ram written above over to actual EEPROM
OWreset();
OWWriteByte(0xCC);
OWWriteByte(0x48); //send the copy command
OWWriteByte(0x30); //copy shadow ram to the block containing 31
break;
default: //Displays help message if you get an 'h' or an unknown command
printf("PyroLogger Board Found and Responding...\n\r");
printf("Firmware Version 2\n\r");
printf("Interactive Mode is ON\n\r");
printf("\n\r");
printf("\n\r");
printf("Command List:\n\r");
printf("h = System Help\n\r");
printf("i = Exit ineractive mode\n\r");
printf("r = Reset DS2482\n\r");
printf("c = Configure DS2482\n\r");
printf("R = Reset One Wire Bus\n\r");
printf("N = Print Net Address\n\r");
}
}
}
/**
* @brief Reads temperature on a ds1820 temperature sensor
* @param temperature Pointer to the measured temperature
* @return 0 if temperature read successfully
*/
int bbb_one_wire_DS1820_read(float* temperature, string* data)
{
/*
int get[10];
char temp_lsb,temp_msb;
int k;
char temp_f,temp_c;
OWTouchReset();
OWWriteByte(0xCC); //Skip ROM
OWWriteByte(0x44); // Start Conversion
tickDelay(5);
OWTouchReset();
OWWriteByte(0xCC); // Skip ROM
OWWriteByte(0xBE); // Read Scratch Pad
for (k=0;k<9;k++)
{
get[k] = OWReadByte();
}
cout << "ScratchPAD DATA = " << get[8] << get[7] << get[6] << get[5] << get[4] << get[3] << get[2] << get[1] << get[0] << endl;
temp_msb = get[1]; // Sign byte + lsbit
temp_lsb = get[0]; // Temp data plus lsb
if (temp_msb <= 0x80)
{
temp_lsb = (temp_lsb/2);
} // shift to get whole degree
temp_msb = temp_msb & 0x80; // mask all but the sign bit
if (temp_msb >= 0x80)
{
temp_lsb = (~temp_lsb)+1;
} // twos complement
if (temp_msb >= 0x80)
{
temp_lsb = (temp_lsb/2);
}// shift to get whole degree
if (temp_msb >= 0x80)
{
temp_lsb = ((-1)*temp_lsb);
} // add sign bit
//cout << "TempC= " << (int)temp_lsb << " degrees C" << endl;// print temp. C
*temperature = (int)temp_lsb;
return 1;
*/
int i = 0;
int a = 1;
unsigned short dataCRC16;
OWTouchReset();
OWWriteByte(SKIP_ROM);
OWWriteByte(CONVERT_T);
while(a)
{
tickDelay(5);
if(OWReadBit())
a = 0;
}
OWTouchReset();
OWWriteByte(SKIP_ROM);
OWWriteByte(READ_SCRATCHPAD);
*temperature = OWReadByte() + (OWReadByte() << 8);
return 1;
/*
if(OWTouchReset())
return 0;
OWWriteByte(0xCC);
OWWriteByte(0xA5);
OWWriteByte((page << 5) & 0xFF);
OWWriteByte(0);
for(i = 0; i < 32; i++)
*data += OWReadByte() + "-";
OWWriteByte(0xFF);
*/
// return result;
}
//--------------------------------------------------------------------------
// The 'OWSearch' function does a general search. This function
// continues from the previous search state. The search state
// can be reset by using the 'OWFirst' function.
// This function contains one parameter 'alarm_only'.
// When 'alarm_only' is TRUE (1) the find alarm command
// 0xEC is sent instead of the normal search command 0xF0.
// Using the find alarm command 0xEC will limit the search to only
// 1-Wire devices that are in an 'alarm' state.
//
// Returns: TRUE (1) : when a 1-Wire device was found and its
// Serial Number placed in the global ROM
// FALSE (0): when no new device was found. Either the
// last search was the last device or there
// are no devices on the 1-Wire Net.
//
int OWSearch()
{
int id_bit_number;
int last_zero, rom_byte_number, search_result;
int id_bit, cmp_id_bit;
unsigned char rom_byte_mask, search_direction, status;
// initialize for search
id_bit_number = 1;
last_zero = 0;
rom_byte_number = 0;
rom_byte_mask = 1;
search_result = FALSE;
crc8 = 0;
// if the last call was not the last one
if (!LastDeviceFlag)
{
// 1-Wire reset
if (!OWReset())
{
// reset the search
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
return FALSE;
}
// issue the search command
OWWriteByte(0xF0);
// loop to do the search
do
{
// if this discrepancy if before the Last Discrepancy
// on a previous next then pick the same as last time
if (id_bit_number < LastDiscrepancy)
{
if ((ROM_NO[rom_byte_number] & rom_byte_mask) > 0)
search_direction = 1;
else
search_direction = 0;
}
else
{
// if equal to last pick 1, if not then pick 0
if (id_bit_number == LastDiscrepancy)
search_direction = 1;
else
search_direction = 0;
}
// Perform a triple operation on the DS2482 which will perform 2 read bits and 1 write bit
status = DS2482_search_triplet(search_direction);
// check bit results in status byte
id_bit = ((status & DS2482_STATUS_SBR) == DS2482_STATUS_SBR);
cmp_id_bit = ((status & DS2482_STATUS_TSB) == DS2482_STATUS_TSB);
search_direction = ((status & DS2482_STATUS_DIR) == DS2482_STATUS_DIR) ? 0x01 : 0x00;
// check for no devices on 1-Wire
if ((id_bit) && (cmp_id_bit))
break;
else
{
if ((!id_bit) && (!cmp_id_bit) && (search_direction == 0))
{
last_zero = id_bit_number;
// check for Last discrepancy in family
if (last_zero < 9)
LastFamilyDiscrepancy = last_zero;
}
// set or clear the bit in the ROM byte rom_byte_number
// with mask rom_byte_mask
if (search_direction == 1)
ROM_NO[rom_byte_number] |= rom_byte_mask;
else
ROM_NO[rom_byte_number] &= (uint8_t)~rom_byte_mask;
// increment the byte counter id_bit_number
// and shift the mask rom_byte_mask
id_bit_number++;
rom_byte_mask <<= 1;
// if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask
if (rom_byte_mask == 0)
{
calc_crc8(ROM_NO[rom_byte_number]); // accumulate the CRC
rom_byte_number++;
rom_byte_mask = 1;
}
}
}
while(rom_byte_number < 8); // (do-while) loop until through all ROM bytes 0-7
// if the search was successful then
if (!((id_bit_number < 65) || (crc8 != 0)))
{
// search successful so set LastDiscrepancy,LastDeviceFlag,search_result
LastDiscrepancy = last_zero;
// check for last device
if (LastDiscrepancy == 0)
LastDeviceFlag = TRUE;
search_result = TRUE;
}
}
// if no device found then reset counters so next 'search' will be like a first
if (!search_result || (ROM_NO[0] == 0))
{
LastDiscrepancy = 0;
LastDeviceFlag = FALSE;
LastFamilyDiscrepancy = 0;
search_result = FALSE;
}
return search_result;
}