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ALI_726
Joined: 15 Aug 2012
Posts: 4
Location: Pakistan
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| MAX6675 |
 Posted: Wed Aug 15, 2012 4:20 am |
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hi i am sending this original code for max6675 Enjoy.....!
just copy and paste this code in to the editor
| Code: | #include <18F452.h>
#device adc=10
#FUSES NOWDT, WDT128, HS, NOPROTECT, NOOSCSEN, BROWNOUT, BORV45, PUT, STVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, NOWRTB, NOWRTC, NOCPD, NOCPB, NOEBTR, NOEBTRB
#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#define TC_CLK PIN_B0
#define TC_CS PIN_B1
#define TC_DATA PIN_B2
int1 thermocouple_error; //a handy dandy global error flag to
//tell you if a thermocouple is connected or not
int16 data;
char msg[32];
void init_TC(void)
{
output_low(TC_CLK);
output_low(TC_DATA);
output_high(TC_CS); //if we idle high, the chip keeps doing conversions. Change this if you like
}
int16 read_TC(void) //It takes 200ms (ish) for the MAX6675 to perform a conversion
{
int8 i;
output_low(TC_CS); //stop any conversion processes
for (i=0;i<16;i++){
output_high(TC_CLK);
output_low(TC_CLK);
shift_left(&data,2,input(TC_DATA)); //reads in 2 bytes to data from the pin TC_DATA
}
thermocouple_error = bit_test(data,2); //this is the thermocouple status bit
output_high(TC_CS);
return(data);
}
int16 sortout(int16 raw)
{
return(0x0FFF & (raw>>3)); //returns only the bits converning temperature
}
float toFloat_TC(int16 tmp)
{
return((float)tmp/4.0); //adjusts data to floating point format, and accounts for the decimal point
}
float do_everything(void)
{
init_TC();
return(toFloat_TC(sortout(read_TC())));
}
void main()
{
port_b_pullups(TRUE);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
while(TRUE){
delay_ms(800);
sprintf(msg,"%01.2f%cC\r\n",do_everything(),0xB0);
if(thermocouple_error)
printf("Thermocouple not connected\r\n");
else
printf("%s",msg);
}
} |
compile this code and Enjoy...! |
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jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
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| code for MAX31855 |
| Posted: Thu Aug 16, 2012 4:23 am |
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Hi, i'm searching long time for code (driver) for MAX31855 that is very like this MAX6675 , can you please design a code to control MAX31855 ?
thank you very much |
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bkamen
Joined: 07 Jan 2004
Posts: 1615
Location: Central Illinois, USA
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| Re: code for MAX31855 |
| Posted: Sat Aug 18, 2012 2:45 am |
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| jruibarroso wrote: | | Hi, i'm searching long time for code (driver) for MAX31855 that is very like this MAX6675 , can you please design a code to control MAX31855 ? |
I don't think you'll find anyone to do your work for you.
Why not just take this driver, modify it as needed and be thankful most of the work was already done for you?
I've written drivers for the 31855... and it's not that hard.
Cheers,
-Ben
p.s. No. I can't give you the code since it was written for a client.
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
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| Posted: Fri Aug 24, 2012 9:13 am |
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Thank you so much for your reply and I understand your reasons.
My problem is that I don't have enough knowledge to design a driver for this IC, so my "cry for help  "
Anyway, if you find something may help me, please let me know.
Greetings |
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bkamen
Joined: 07 Jan 2004
Posts: 1615
Location: Central Illinois, USA
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| Posted: Fri Aug 24, 2012 9:43 am |
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| jruibarroso wrote: | Thank you so much for your reply and I understand your reasons.
My problem is that I don't have enough knowledge design a driver for this IC, so my "cry for help "
Anyway, if you find something may help me, please let me know.
|
That's the joy of learning! I'm assuming you're a student...
If you work at a company, I'm sure there are many here willing to write such a driver for you as a contractor.
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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ALI_726
Joined: 15 Aug 2012
Posts: 4
Location: Pakistan
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| Posted: Sat Aug 25, 2012 3:26 am |
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| jruibarroso wrote: | Thank you so much for your reply and I understand your reasons.
My problem is that I don't have enough knowledge to design a driver for this IC, so my "cry for help "
Anyway, if you find something may help me, please let me know.
Greetings |
dear don't worrry, I write the code for students and others. Also your code is almost ready, within a few days it will be on forum. |
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ALI_726
Joined: 15 Aug 2012
Posts: 4
Location: Pakistan
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| driver for MAX31855 |
| Posted: Mon Aug 27, 2012 5:07 am |
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| jruibarroso wrote: | Thank you so much for your reply and I understand your reasons.
My problem is that I don't have enough knowledge to design a driver for this IC, so my "cry for help "
Anyway, if you find something may help me, please let me know.
Greetings |
hello dear this is driver for you.........!
| Code: |
#include <18F452.h>
#device adc=10
#FUSES NOWDT, WDT128, HS, NOPROTECT, NOOSCSEN, BROWNOUT, BORV45, PUT, STVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, NOWRTB, NOWRTC, NOCPD, NOCPB, NOEBTR, NOEBTRB
#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#define TC_CLK PIN_E0
#define TC_CS PIN_E1
#define TC_DATA PIN_E2
int1 thermocouple_error,Short_to_Gnd,Short_to_Vcc,Open_Circuit;
//a handy dandy global error flag to
//tell you if a thermocouple is connected or not
int32 data;
char msg[32];
void init_TC(void)
{
output_low(TC_CLK);
output_low(TC_DATA);
output_high(TC_CS); //if we idle high, the chip keeps //doing conversions. Change this if you like
}
int32 read_TC(void)
{
int8 i;
output_low(TC_CS); //stop any conversion processes
for (i=0;i<32;i++){
output_high(TC_CLK);
output_low(TC_CLK);
shift_left(&data,4,input(TC_DATA)); //reads in 4 bytes to data from the pin TC_DATA
}
thermocouple_error = bit_test(data,16); //this is the thermocouple status bit
Open_Circuit = bit_test(data,0); //this is the thermocouple status bit
Short_to_Gnd = bit_test(data,1); //this is the thermocouple status bit
Short_to_Vcc = bit_test(data,2); //this is the thermocouple status bit
output_high(TC_CS);
return(data);
}
int32 sortout(int32 raw)
{
return(0x00003FFF & (raw>>18)); //returns only the bits converning temperature
}
float toFloat_TC(int32 tmp)
{
return((float)tmp/4.0); //adjusts data to floating point format, and accounts for the decimal point
}
float do_everything(void)
{
init_TC();
return(toFloat_TC(sortout(read_TC())));
}
void main()
{
port_b_pullups(TRUE);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
while(TRUE){
delay_ms(800);
sprintf(msg,"%03.2f%cC\r\n",do_everything(),0xB0);
if(thermocouple_error)
printf("Thermocouple not connected\r\n");
if(Open_Circuit)
printf("Thermocouple not open\r\n");
if(Short_to_Gnd)
printf("Thermocouple short to Ground\r\n");
if(Short_to_Vcc)
printf("Thermocouple short to Vcc\r\n");
else
printf("%s",msg);
}
} |
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jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
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| Posted: Mon Sep 03, 2012 6:03 am |
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| bkamen wrote: | | jruibarroso wrote: | Thank you so much for your reply and I understand your reasons.
My problem is that I don't have enough knowledge design a driver for this IC, so my "cry for help "
Anyway, if you find something may help me, please let me know.
|
That's the joy of learning! I'm assuming you're a student...
If you work at a company, I'm sure there are many here willing to write such a driver for you as a contractor. |
No, I'm not a student, only a self learning person and yes, I work in a company that's mine. |
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jruibarroso
Joined: 07 Jan 2006
Posts: 64
Location: Braga
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| Posted: Tue Sep 04, 2012 5:18 am |
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I wrote this code with some changes to show results on a LCD
Now it's all ok but if temperature readings go along 32.768 ºC , readings go crazy , seems mcu is dealing with a 16bit variable but data is int32
can you help me one more time ??
Thank you
| Code: |
#include <18F252.h>
#device adc=10
#fuses HS,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP
#use delay(clock=20000000)
#define TC_CLK PIN_C6
#define TC_CS PIN_C5
#define TC_DATA PIN_C4
#include <Display_2x16 Detector manual CE.c>
#include <lcd_symbols.c>
int1 thermocouple_error,Short_to_Gnd,Short_to_Vcc,Open_Circuit; //a handy dandy global error flag to
//tell you if a thermocouple is connected or not
int32 data;
// char msg[32];
void init_TC(void)
{
output_low(TC_CLK);
output_low(TC_DATA);
output_high(TC_CS); //if we idle high, the chip keeps //doing conversions. Change this if you like
}
int32 read_TC(void)
{
int8 i;
output_low(TC_CS); //stop any conversion processes
for (i=0;i<32;i++){
output_high(TC_CLK);
output_low(TC_CLK);
shift_left(&data,4,input(TC_DATA)); //reads in 4 bytes to data from the pin TC_DATA
}
// thermocouple_error = bit_test(data,16); //this is the thermocouple status bit
Open_Circuit = bit_test(data,0); //this is the thermocouple status bit
Short_to_Gnd = bit_test(data,1); //this is the thermocouple status bit
Short_to_Vcc = bit_test(data,2); //this is the thermocouple status bit
output_high(TC_CS);
return(data);
}
int32 sortout(int32 raw)
{
return(0x00003FFF & (raw>>18)); //returns only the bits converning temperature
}
float toFloat_TC(int32 tmp)
{
return((float)tmp/4.0); //adjusts data to floating point format, and accounts for the decimal point
}
float do_everything(void)
{
init_TC();
return(toFloat_TC(sortout(read_TC())));
}
void main()
{
// port_b_pullups(TRUE);
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
// setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
lcd_init();
delay_ms(80);
init_user_chars();
delay_ms(80);
while(TRUE){
delay_ms(100);
// sprintf(msg,"%03.2f%cC",do_everything(),0xB0);
//if(thermocouple_error) {printf(lcd_putc,"\fThermocouple not connected");DELAY_MS(200);}
if(Open_Circuit) {printf(lcd_putc,"\fThermocouple open");DELAY_MS(200);}
if(Short_to_Gnd) {printf(lcd_putc,"\fThermocouple shrt GND");DELAY_MS(200);}
if(Short_to_Vcc) {Printf(lcd_putc,"\fThermocouple shrt Vcc");DELAY_MS(200);}
printf(lcd_putc,"\f %5.3w %cC",do_everything(),223);
}
} |
[/code] |
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