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-rw-r--r--src/lm75.c258
-rw-r--r--src/main.c4
2 files changed, 190 insertions, 72 deletions
diff --git a/src/lm75.c b/src/lm75.c
index 9510a46..c1b67f0 100644
--- a/src/lm75.c
+++ b/src/lm75.c
@@ -4,7 +4,7 @@
#include <string.h>
#include <unistd.h>
#include <errno.h>
-#include <ctype.h> //# isdigit
+#include <ctype.h> //# isdigit()
#include "lm75.h"
@@ -22,10 +22,20 @@ uchar buf[32];
void lm75_print_all(void)
{
printf(
- "00: Temperature data [°C] (reg: 0x00)\n"
- "01: Configuration [hex] (reg: 0x01)\n"
- "02: Tos (Overtemp) [°C] (reg: 0x03)\n"
- "03: Thys (Hysteresis) [°C] (reg: 0x04)\n"
+ "============ LM75xx interface ===========\n"
+ "Registers:\n"
+ " 00: Temperature data [°C] (reg: 0x00)\n"
+ " 01: Configuration [hex] (reg: 0x01)\n"
+ " 02: Tos (Overtemp) [°C] (reg: 0x03)\n"
+ " 03: Thys (Hysteresis) [°C] (reg: 0x04)\n"
+ "Configuration:\n"
+ " tos: Over-Temperature register [-55°C...+125°C]\n"
+ " thys: Temperature-hysteresis register [-55°C...+125°C]\n"
+ " conf: Configuration register [hexadecimal]\n"
+ " sleep: Set idle mode [on/off]\n"
+ " mode: Comparator/Interrupt mode [comp/int]\n"
+ " tos_pol: Tos pin polarity (Low/High) [Al/Ah]\n"
+ " fault_q: Fault queue length [1/2/4]\n"
"\n");
}
@@ -44,51 +54,55 @@ uchar *xchg_data (uchar *buf, uint8 wrlen, uint8 waitlen, uint8 rdlen){
}
-
float calculate_temp(float offset){ // Calculate temperature
- int16 rawtemp = 0; //# Signed by default
+ uint16 rawtemp = 0; //# Signed by default
float temp;
buf[0] = 0x00; //# Measurement in the REG[0]
xchg_data(buf,1,0,2); //# Write: 1byte addr, Read: 2byte data, Wait:0, [buf] = 32 byte
-
- rawtemp = (buf[0]*256 + buf[1]) >> 5; // (buf[0] << 8), and (>> 5), Device with 11bit data, is also supported
+ rawtemp = (buf[0]*256 + buf[1]) >> 5; //# /x*256 == x << 8/ (>> 5): Temp is 11bit data register
if((rawtemp & 0x400) == 0x400){ //# check if the msb(bit11) is 1 (1024 = 0x400), 2'complement negative number
- rawtemp = rawtemp - 2048; //# 2^11 = 2048
- }
-
- temp = rawtemp * 0.125 ; //# 11bit -> 0.125°C or 9bit -> 0.5°C
+ rawtemp = ~rawtemp + 1; //# 2'complement data
+ rawtemp = rawtemp & 0x7ff; //# Only the lowest 11bit needed
+ temp = -1 * rawtemp * 0.125 ;
+ } else {
+ temp = rawtemp * 0.125 ; //# 11bit -> 0.125°C or 9bit -> 0.5°C
+ }
return (temp + offset);
}
-
float read_tos(void){ // Over-Temperature Shutdown register
- int16 rawtemp = 0; //# Int16 default signed
- buf[0] = 0x02; //# Tos = REG[2]
+ uint16 rawtemp = 0; //# Int16 default signed
+ buf[0] = 0x03; //# Tos = REG[2]
xchg_data(buf,1,0,2);
- rawtemp = buf[0]*256 + buf[1];
+ rawtemp = buf[0]*256 + buf[1]; // x*256 == x << 8
rawtemp = (rawtemp) >> 7; //# 9bit data
- if((rawtemp & 256) == 256){ //# check MSB if it's a 2'complement number
- rawtemp = rawtemp - 512 ; //# 2^9 = 512;
+ if((rawtemp & 0x100) == 0x100){ //# check MSB if it's a 2'complement number
+ rawtemp = ~rawtemp + 1 ; //# 2'complement, 2^9 = 512;
+ rawtemp = rawtemp & 0x1FF; //# lowest 9 bit
+ return (-1 * rawtemp * 0.5);
+ } else {
+ return (rawtemp * 0.5); //# 9bit -> 0.5 celsius
}
- return (rawtemp * 0.5); //# 9bit -> 0.5 celsius
}
-
float read_thys(void){ // Over-Temp Hysteresis Register
- int16 rawtemp = 0; //# signed
- buf[0] = 0x03;
- xchg_data(buf,1,0,2); //# read from REG[3]
+ uint16 rawtemp = 0; //# signed
+ buf[0] = 0x02;
+ xchg_data(buf,1,0,2); //# read from REG[3]
- rawtemp = buf[0]*256 + buf[1];
- rawtemp = (rawtemp) >> 7; //# 9bit data
- if((rawtemp & 256) == 256){
- rawtemp = rawtemp - 512 ; //# 2^9 = 512;
+ rawtemp = (buf[0] << 8) + buf[1];
+ rawtemp = (rawtemp) >> 7; //# 9bit data
+
+ if((rawtemp & 256) == 256){ //# 256 = 0x100
+ rawtemp = ~rawtemp + 1 ; //# 2'complement, 2^9 = 512;
+ rawtemp = rawtemp & 0x1FF; //# lowest 9 bit
+ return (-1 * rawtemp * 0.5);
}
return (rawtemp * 0.5); //# 9bit -> 0.5 celsius
}
@@ -96,28 +110,25 @@ float read_thys(void){ // Over-Temp Hysteresis Register
uchar read_conf(void){ //Configuration register
buf[0] = 0x01;
- xchg_data(buf,1,0,2);
+ xchg_data(buf,1,0,1);
return buf[0];
}
-
void lm75_read_all(const uchar *opts){ // Print out whole device's data
// if(opts != NULL)
// {
// printf("00:%f\n", calculate_temp(strtof(opts, NULL)));
- // }
- // else
- // {
+ // } else {
printf("00:%f\n", calculate_temp(0.0));
// }
printf("01:0x%x\n", read_conf());
- printf("02:%f\n", read_tos());
- printf("03:%f\n", read_thys());
+ printf("02:%f\n", read_thys());
+ printf("03:%f\n", read_tos());
+
}
-
void lm75_read_one(const uchar *opts){ // Prints the selected register's data
uint16 id,i;
uchar temp[256];
@@ -151,10 +162,10 @@ void lm75_read_one(const uchar *opts){ // Prints the selected r
printf("0x%x\n", read_conf());
break;
case 0x02:
- printf("%f\n", read_tos());
+ printf("%f\n", read_thys());
break;
case 0x03:
- printf("%f\n", read_thys());
+ printf("%f\n", read_tos());
break;
default:
print_help();
@@ -165,66 +176,169 @@ void lm75_read_one(const uchar *opts){ // Prints the selected r
void lm75_conf_set(const uchar *opts){ // Prints the selected register's data
- uint16 id,i,j;
+ uint16 i,j;
uchar temp[256];
if(opts != NULL){
for(i = 0; i < strlen((char*)opts); i++, j++){
- if (*(opts+i) == ','){
+ if (*(opts+i) == ','){ //# .... conf_set 0x49 thys,-10.5
break;
}
temp[i] = *(opts+i);
temp[i+1] = '\0';
}
- if(!strcmp("tos", (char*)temp)){ //# Set the Tos register value
+
+ if(!strcmp("tos", (char*)temp)){ //# Set the Tos register value
+ float inp;
+ uint16 temp;
+ buf[0] = 0x03;
+ inp = atof( (char*)(opts+i+1));
+
+ if(inp < 0){
+ temp = 0 - inp/0.5;
+ temp = ~temp +1; //# 2'complement
+ buf[1] = (temp >> 1) & 0xFF; //# (x << 7) and (x >> 8) ==> (x >> 1)
+ buf[2] = ((temp << 7) | 0x7F) & 0xFF; //# |d8,d7,d6,d5|d4,d3,d2,d1|d0,xx,xx,xx|xx,xx,xx,xx|
+ } else {
+ temp = inp/0.5;
+ buf[1] = (temp >> 1) & 0xFF; //# (x << 7) and (x >> 8) ==> (x >> 1)
+ buf[2] = (temp << 7) & 0xFF;;
+ }
+ xchg_data(buf,3,0,2);
+
}else if(!strcmp("thys", (char*)temp)){ //# Set the Thys reg
+ float inp;
+ uint16 temp;
+ buf[0] = 0x02;
+ inp = atof( (char*)(opts+i+1));
+
+ if(inp < 0){
+ temp = 0 - inp/0.5;
+ temp = ~temp +1; //# 2'complement
+ buf[1] = (temp >> 1) & 0xFF; //# (x << 7) and (x >> 8) ==> (x >> 1)
+ buf[2] = ((temp << 7) | 0x7F) & 0xFF; //# |d8,d7,d6,d5|d4,d3,d2,d1|d0,xx,xx,xx|xx,xx,xx,xx|
+ } else {
+ temp = inp/0.5;
+ buf[1] = (temp >> 1) & 0xFF; //# (x << 7) and (x >> 8) ==> (x >> 1)
+ buf[2] = (temp << 7) & 0xFF;;
+ }
+ xchg_data(buf,3,0,2);
+
}else if(!strcmp("conf", (char*)temp)){ //# Set whole conf register
+ buf[0] = 0x01;
+ buf[1] = strtol((char*)(opts+i+1),NULL,0);
+ xchg_data(buf,2,0,1);
+
+
}else if(!strcmp("sleep", (char*)temp)){ //# Send the sleep command
+
+ buf[0] = 0x01;
+ xchg_data(buf,1,0,1);
+ if (!strcmp("on",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0x01;
+ }
+ else if(!strcmp("off",(char*)opts+i+1))
+ {
+ // buf[1] = ~buf[0]; //# XOR = NEG->OR->NEG
+ // buf[1] = buf[1] | 0b00000001; //# Invert->add->invert
+ // buf[1] = ~buf[1];
+ buf[1] = buf[0] ^ 0b00000001; //# XOR to clear the bit
+ }
+ else
+ {
+ lm75_print_all();
+ exit(EXIT_FAILURE);
+ }
+ buf[0] = 0x01;
+ xchg_data(buf,2,0,1);
+
}else if(!strcmp("mode", (char*)temp)){ //# Comparator/Interrupt mode
+
+ buf[0] = 0x01;
+ xchg_data(buf,1,0,1);
+ if (!strcmp("comp",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] ^ 0b00000010; //# XOR to clear
+ }
+ else if(!strcmp("int",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0b00000010;
+ }
+ else
+ {
+ lm75_print_all();
+ exit(EXIT_FAILURE);
+ }
+ buf[0] = 0x01;
+ xchg_data(buf,2,0,1);
+
}else if(!strcmp("tos_pol", (char*)temp)){ //# Tos polarity
+
+ buf[0] = 0x01;
+ xchg_data(buf,1,0,1);
+ if (!strcmp("Al",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] ^ 0b00000100; //# XOR to clear the bit
+ }
+ else if(!strcmp("Ah",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0b00000100;
+ }
+ else
+ {
+ lm75_print_all();
+ exit(EXIT_FAILURE);
+ }
+ buf[0] = 0x01;
+ xchg_data(buf,2,0,1);
+
}else if(!strcmp("fault_q", (char*)temp)){ //# Tos Fault Queue
+
+ buf[0] = 0x01;
+ xchg_data(buf,1,0,1);
+ if (!strcmp("1",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0b00011000; //# Add and clear whole section
+ buf[1] = buf[1] ^ 0b00011000;
+ }
+ else if(!strcmp("2",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0b00011000; //# Clear first
+ buf[1] = buf[1] ^ 0b00011000; //# Clear first
+ buf[1] = buf[1] | 0b00001000; //# Set
+ }
+ else if(!strcmp("4",(char*)opts+i+1))
+ {
+ buf[1] = buf[0] | 0b00011000; //# Clear first
+ buf[1] = buf[1] ^ 0b00011000; //# Clear first
+ buf[1] = buf[1] | 0b00010000; //# Set
+ }
+ else
+ {
+ lm75_print_all();
+ exit(EXIT_FAILURE);
+ }
+ buf[0] = 0x01;
+ xchg_data(buf,2,0,1);
+
} else {
- for(i = 0; i < strlen((char*)opts); i++ ){
- if( !isxdigit(*(opts+i)) || *(opts+i) !='x' || opts[i] != ','){ //# Check the register string
- printf("The Register address, and value must be a hex, or an integer!\n");
+ // for(i = 0; i < strlen((char*)opts); i++ ){
+ // if( !isxdigit(*(opts+i)) || *(opts+i) !='x' || opts[i] != ','){ //# Check the register string
+ // printf("The Register address, and value must be a hex, or an integer!\n");
print_help();
+ lm75_print_all();
exit (EXIT_FAILURE);
- }
- }
+ // }
+ // }
}
-
-
-
- id = atoi((char*)temp);
- strncpy((char*)temp, (char*)opts+i+1, 255);
- // id = strtol (opts,&ptr,0); //all format allowed
- // ptr++; //one separator allowed
-
- switch (id)
- {
- case 0x00:
- printf("%f\n", calculate_temp(atof((char*)temp)));
- break;
- case 0x01:
- printf("0x%x\n", read_conf());
- break;
- case 0x02:
- printf("%f\n", read_tos());
- break;
- case 0x03:
- printf("%f\n", read_thys());
- break;
- default:
- print_help();
- }
-
}
} \ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 7afe9c0..6012a03 100644
--- a/src/main.c
+++ b/src/main.c
@@ -155,6 +155,10 @@ int main(int argc, char *argv[])
{
read_one((uchar*)argv[5]);
}
+ else if(!strcmp("conf_set",argv[1]) && conf_set != NULL && argc > 5) //# Prints out the selected register
+ {
+ conf_set((uchar*)argv[5]);
+ }
else //# No other option
{
print_help();
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 13:24:20 +0000