//-----------------------------------------------------------------------------
// 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 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;
}
//-----------------------------------------------------------------------------
// 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;
}
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");
}
}
/**
* @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;
}
