joey shelton
OT07 I2C GUI Firmware
Dependencies: SDFileSystem max32630fthr USBDevice
Fork of
FTHR_SD_Demo
by 
Maxim Integrated
main.cpp
- Committer:
- cyberjoey
- Date:
- 2020-05-01
- Revision:
- 31:2e7483c7281b
- Parent:
- 30:3a1d9c2b49a5
File content as of revision 31:2e7483c7281b:
#include "mbed.h"
#include "SDFileSystem.h"
#include "max32630fthr.h"
#include "USBSerial.h"
#include <ctype.h>
#define PERIOD 10 // Logging period in seconds
#define CONVERT_T_DELAY 30
//OT07 Registers
#define OT07_STATUS 0x00 // OT07 status regiter
#define OT07_INT_EN 0x01 // OT07 Interrupt Enable
#define OT07_FIFO_W 0x04 // OT07 FIFO Write Pointer
#define OT07_FIFO_R 0x05 // OT07 FIFO Read Pointer
#define OT07_FIFO_OF 0x06 // OT07 FIFO Overflow Counter
#define OT07_FIFO_COUNT 0x07 // OT07 FIFO Data Count
#define OT07_FIFO_DATA 0x08 // OT07 FIFO Data
#define OT07_FIFO_CNFG1 0x09 // OT07 FIFO Configuration 1 (FIFO_A_FULL)
#define OT07_FIFO_CNFG2 0x0A // OT07 FIFO Configuration 2
#define OT07_SYS 0x0C // OT07 System Configuration
#define OT07_ALARM_HIGH_MSB 0x10 // OT07 Alarm High MSB
#define OT07_ALARM_HIGH_LSB 0x11 // OT07 Alarm High LSB
#define OT07_ALARM_LOW_MSB 0x12 // OT07 Alarm Low MSB
#define OT07_ALARM_LOW_LSB 0x13 // OT07 Alarm LOW LSB
#define OT07_ADC_SETUP 0x14 // OT07 Temp Seneor Setup (ADC_RES[7:6]) & Convert Temperature [0]
#define OT07_GPIO_SETUP 0x20 // OT07 GPIO Setup, sets GPIO modes
#define OT07_GPIO_CTRL 0x21 // OT07 GPIO control
#define OT07_ROM_ID 0x31 // OT07 ROM_ID address of LSB?
#define DEVICE_ACK 0
#define DEVICE_NACK 1
#define DEVICE_BAD_RESP 2
#define MAX_DEVICES 64 // Maximum number of rom devices allowed
#define ID_LENGTH 6 // Rom ID length in bytes
#define BS 8 // ASCII Back Space
#define CR 13 // ASCII Carriage Return
struct OT07_struct {
char rom_id[ID_LENGTH]; // device ROM ID
char I2C_address; // I2C addess, based on GPIO0 and GPIO1 at power up
};
struct TempResponse {
double tempC; // Temperature in °C
int status; // Status of Temperature read. 0 for success, 1 for error
};
const char* settings_file = "/sd/settings.txt";
const char* log_file = "/sd/MAX30208Log.csv";
//global variable
//******************** init Feather Boared Hardware ***********************
MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
//microSD logging file system setup
SDFileSystem sd(P0_5, P0_6, P0_4, P0_7, "sd"); // mosi, miso, sclk, cs
//SD card insertion detection pin
DigitalIn SDDetect(P2_2, PullUp);
InterruptIn SDInsert(P2_2);
// Virtual serial port over USB
USBSerial pc(0x0B6A, 0x0042, 0x0001, false);
// I2C setup
I2C i2c(P3_4,P3_5); // P3_4 -> I2C1_SDA, P3_5-> I2C1_SCL
//Timer setup
Ticker timer_1; // timer for blinking led heartbeat
bool tick_flag; // used for counting seconds
bool log_flag = false;
bool led_toggle_flag = false;
bool button_flag = false;
bool sd_insert_flag = false;
bool error_flag;
int error_ticks;
//LED blink setup
DigitalOut rLED(LED1);
DigitalOut gLED(LED2);
DigitalOut bLED(LED3);
InterruptIn button(SW1);
void LED_blink_callback(){ // LED Heart beat
led_toggle_flag = !led_toggle_flag;
if(log_flag) //if logging
{
if(led_toggle_flag)
{
//toggle red led
rLED = LED_ON;
}
else
{
rLED = LED_OFF;
gLED = LED_OFF;
bLED = LED_OFF;
}
}
else if(error_flag) //if error (no sd card)
{
if(led_toggle_flag)
{
//toggle red led
rLED = LED_ON;
gLED = LED_ON;
}
else
{
rLED = LED_OFF;
gLED = LED_OFF;
bLED = LED_OFF;
}
error_ticks--;
if(error_ticks <= 0)
error_flag = false;
}
else
{
if(led_toggle_flag)
{
//toggle teal leds
gLED = LED_ON;
bLED = LED_ON;
}
else
{
rLED = LED_OFF;
gLED = LED_OFF;
bLED = LED_OFF;
}
}
tick_flag = true;
}
void btn_pressed() //button pressed isr
{
button_flag = true;
}
void sd_insert() //sd_insert pressed isr
{
sd_insert_flag = true;
}
// *****************************************************************************
// Define CRC-8 Table
// *****************************************************************************
static unsigned char crc_table[] = {
0, 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65,
157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220,
35,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98,
190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255,
70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7,
219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154,
101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36,
248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185,
140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205,
17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80,
175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238,
50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115,
202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139,
87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22,
233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168,
116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53};
// -----------------------------------------------------------------------------
// Calculate the CRC8 of the byte value provided with the current total
// calc_crc8(unsigned char, unsigned char) crc8 total, byte to add
// pass crc8 total = 0 to start new crc sum.
// Returns new crc8 total
// -----------------------------------------------------------------------------
unsigned char calc_crc8(unsigned char crc8, unsigned char value){
return crc_table[crc8 ^ value];
}
// *****************************************************************************
// OT07_write_register(char, char, char) writes single byte to OT07
// char I2C address
// char OT07 register address
// char data byte to be writen
// returns 0 on success ACK, 1 on NACK
// *****************************************************************************
int OT07_write_register(char I2C_add, char reg_add, char byte){
char data[2];
int error;
data[0] = reg_add;
data[1] = byte;
error = i2c.write(I2C_add,data,2);
//if(DEBUG)db.printf("wr[%02X %02X %d]\r\n", data[0], data[1], error);
return error;
}
/// ****************************************************************************
// OT07_write_register(char, char, char *, int) writes multiple bytes to OT07
// char I2C address
// char OT07 register address
// char * data vector of bytes to be written
// int number of bytes to write
// returns 0 on success ACK, 1 on NACK
// *****************************************************************************
int OT07_write_register(char I2C_add, char reg_add, char *bytes, int n){
int i;
//set start address
char data[16];
int error;
data[0] = reg_add;
for(i=1;i<=n;i++){
data[i] = bytes[i-1];
}
error = i2c.write(I2C_add,data,n+1); // send n bytes of data
return error;
}
// *****************************************************************************
// OT07_read_register(char, char, char *, int) writes single byte to OT07
// char I2C address
// char OT07 register address
// char * data vector for read bytes to be stored in
// int number of bytes to read
// returns 0 on success, 1 on fail
// *****************************************************************************
int OT07_read_register(char I2C_add, char reg_add, char *bytes, int n){
int error;
error = i2c.write(I2C_add,®_add,1,1);
if(error)return error;
error = i2c.read(I2C_add,bytes,n);
//if(DEBUG)db.printf("rr e[%d]\r\n",error);
return error;
}
// *****************************************************************************
// search_I2C_bus(OT07_struct *) searches I2C address 0xA0, 0xA2, 0xA4 and 0xA6
// OT07_struct * structure array to holds I2C address and rom_ids
// returns number of devices found
// *****************************************************************************
int search_I2C_bus(OT07_struct OT07[]){
char data[16];
char I2C_add;
//char GPIO;
int error;
int device_count = 0;
int i;
int j;
for(i = 0;i<4;i++){
I2C_add = 0xA0 + i*2;
error = OT07_read_register(I2C_add,0xff,data,1);
if(error == 0){
if(data[0] == 0x30){
OT07[device_count].I2C_address = I2C_add;
OT07_read_register(I2C_add,OT07_ROM_ID,data,ID_LENGTH);
for(j=ID_LENGTH-1;j>=0;j--){
OT07[device_count].rom_id[j] = data[j];
}
device_count++;
}
}
}
return device_count;
}
// *****************************************************************************
// convert_temperature(char) sends convert command to OT07 device
// char I2C address
// *****************************************************************************
void convert_temperature(char I2C_add){ // set convert bit to start conversion
char data[2];
//read ADC_SETUP register 0x14
OT07_read_register(I2C_add, OT07_ADC_SETUP,data,1);
//mask convert register value with 0x01 and write back register 0x14
OT07_write_register(I2C_add, OT07_ADC_SETUP, data[0]|0x01);
}
//******************************************************************************
// get_temperature(char) read temperature from OT07 device FIFO register
// char I2C address
// returns TempResponse tempC = temperature in oC
// status = register read result
//******************************************************************************
TempResponse get_temperature(char I2C_add){
char data[2];
double T;
int count;
// Read temperature from FIFO, 2 bytes
int error = OT07_read_register(I2C_add,OT07_FIFO_DATA,data,2);
//calculate temperture from data
count = (int)(data[0]*256 + data[1]);
if (count >= 32768)count = count - 65536; // 2s comp
T = (double)count*0.005;
TempResponse resp;
resp.tempC = T;
resp.status = error; // 1 for nack/error. 0 for ack/success
return resp;
}
void write_settings_file(int interval, bool device_logged[MAX_DEVICES])
{
FILE *fp = fopen(settings_file, "w");
if (fp != NULL)
{
fprintf(fp, "i %d\r\n", interval);
fprintf(fp, "d");
for(int i = 0; i < MAX_DEVICES; i++)
{
if(device_logged[i] == true)
{
fprintf(fp," %d", i);
}
}
fprintf(fp,"\r\n");
fclose(fp);
}
return;
}
void clear_log_file()
{
FILE *fp = fopen(log_file, "w");
if (fp != NULL)
{
fclose(fp);
}
return;
}
bool print_settings_file()
{
FILE *fp = fopen(settings_file, "r");
if (fp != NULL)
{
pc.printf("*\r\n");
// Read contents from file
char c = fgetc(fp);
while (!feof(fp))
{
pc.printf("%c", c);
c = fgetc(fp);
}
pc.printf("*\r\n");
fclose(fp);
}
else
{
return false;
}
return true;
}
bool print_log_file()
{
FILE *fp = fopen(log_file, "r");
if (fp != NULL)
{
pc.printf("*\r\n");
// Read contents from file
char c = fgetc(fp);
while (!feof(fp))
{
pc.printf("%c", c);
c = fgetc(fp);
}
pc.printf("*\r\n");
fclose(fp);
}
else
{
return false;
}
return true;
}
int getline(char **lineptr, int *n, FILE *stream) {
char *bufptr = NULL;
char *p = bufptr;
size_t size;
int c;
if (lineptr == NULL) {
return -1;
}
if (stream == NULL) {
return -1;
}
if (n == NULL) {
return -1;
}
bufptr = *lineptr;
size = *n;
c = fgetc(stream);
if (c == EOF) {
return -1;
}
if (bufptr == NULL) {
bufptr = (char *)malloc(128);
if (bufptr == NULL) {
return -1;
}
size = 128;
}
p = bufptr;
while(c != EOF) {
if ((p - bufptr) > (size - 1)) {
size = size + 128;
bufptr = (char *)realloc(bufptr, size);
if (bufptr == NULL) {
return -1;
}
}
*p++ = c;
if (c == '\n') {
break;
}
c = fgetc(stream);
}
*p++ = '\0';
*lineptr = bufptr;
*n = size;
return p - bufptr - 1;
}
bool print_settings_file_2()
{
char * line = NULL;
int len = 0;
FILE *fp = fopen(settings_file, "r");
if (fp != NULL)
{
pc.printf("*\r\n");
// Read contents from file
while ((getline(&line, &len, fp)) != -1)
{
pc.printf("%s", line);
}
pc.printf("*\r\n");
fclose(fp);
}
else
{
return false;
}
return true;
}
//returns true if settings file exists and is in the proper format
bool apply_settings_file(bool (&logged_devices)[MAX_DEVICES], int& interval)
{
char * line = NULL;
int len = 0;
int line_number = 0;
FILE *fp = fopen("/sd/settings.txt", "r");
if (fp != NULL)
{
//initialize devices to all false;
for(int i = 0; i < MAX_DEVICES; i++)
{
logged_devices[i] = false;
}
// Read contents from file
while ((getline(&line, &len, fp)) != -1)
{
line_number++;
char i = 0;
char c = line[i];
while(c != '\0')
{
int number;
int n;
sscanf((line+i), "%d%n", &number, &n);
if(isdigit(c))
{
if(line_number == 1)
{
interval = number;
}
else if(line_number == 2)
{
logged_devices[number] = true;
}
if(n > 1)
i = i + (n - 1);
}
i++;
c = line[i];
}
}
fclose(fp);
}
else
{
return false;
}
return true;
}
//******************************************************************************
// main()
//******************************************************************************
int main()
{
OT07_struct OT07[4]; // structure that holds I2C address and ROM_ID
char data[130];
int device_count = 0; // number of OW devices found by search_rom()
int i;
int j;
int k;
char device_id[ID_LENGTH]; //8 byte rom id of current slected device
char rom_id_list[MAX_DEVICES][ID_LENGTH]; //List of rom id for each device on OW bus
TempResponse T[MAX_DEVICES];
bool device_logged[MAX_DEVICES];
//initialize device_logged to all false;
for(int i = 0; i < MAX_DEVICES; i++)
{
device_logged[i] = false;
}
// i/o variables
char rx_buff[128]; // comport input buffer
int rx_index; // rx_buffer pointer
char c; // command type character
int n; // argument count
int arg1; // argumnet 1
int arg2; // argument 2
int device; // device argument
int num_bytes;
int time_count;
int log_interval = PERIOD;
int time_to_sample;
apply_settings_file(device_logged, log_interval);
//************* init ticker timer callbacks ****************
timer_1.attach(&LED_blink_callback,0.5); //start ticker, once per sec.
i2c.frequency(400000); //set I2C clock to 400kHz
rLED = LED_OFF;
gLED = LED_ON;
bLED = LED_ON;
// ****************** search for all devices on bus *****************
device_count = search_I2C_bus(OT07);
rx_index = 0; //character buffer index for input from PC
button.fall(&btn_pressed);
SDInsert.fall(&sd_insert);
sd.disk_initialize(); //initialize sd card
while(1) { // start main loop, take data if logging, check for input, repeat
if(sd_insert_flag == true)
{
sd.disk_initialize();
sd_insert_flag = false;
}
if(button_flag == true)
{
if(log_flag == false){ //start logging
if(SDDetect)//if SD card not detected
{
error_flag = true;
error_ticks = 6;
log_flag = false;
}
else
{
apply_settings_file(device_logged, log_interval);
FILE *fp = fopen(log_file, "a");
if (fp != NULL)
{
fprintf(fp,"Device List\r\n");
fprintf(fp,"Device Number,Address,Unique ID\r\n");
for(j=0;j<device_count;j++)
{
if(device_logged[j])
{
fprintf(fp,"%d,0x%02X,0x",j, OT07[j].I2C_address);
for(i=ID_LENGTH-1;i>=0;i--)
{
fprintf(fp,"%02X",OT07[j].rom_id[i]);
}
fprintf(fp,"\r\n");
}
}
fprintf(fp, "Temperature Log\r\n");
fprintf(fp, "Time (s)");
for(j=0;j<device_count;j++)
{
if(device_logged[j])
fprintf(fp,",Device %d Temperature (C)",j);
}
fprintf(fp,"\r\n");
fclose(fp);
}
time_count = 0;
time_to_sample = 0; // force sample at time = 0;
tick_flag = true; // force sample at time = 0;
log_flag = true;
}
}else{
log_flag = false;
}
button_flag = false;
}
while(tick_flag == false){ //check for input while waiting for next tick
// ----------------------------------------------------------------------------
// test for charater input for USB com port
// ----------------------------------------------------------------------------
//test if PC sent some charaters
while(pc.readable()){ //characters in buffer, get them
rx_buff[rx_index] = pc.getc();
if(rx_buff[rx_index] == CR){
rx_buff[++rx_index] = 0;
rx_index = -1; // because i++ at end of while give i=0 on next loop
device = 0;
arg1 = 0;
arg2 = 0;
n = sscanf(rx_buff, " %c %d %x %x", &c, & device, &arg1, &arg2);
//process input
if(n > 0){//got input so process it
switch(c){
case 'a':
case 'A':
break;
case 'c':
case 'C':
if(!SDDetect)
pc.printf("y\r\n");
else
pc.printf("n\r\n");
break;
case 'd':
case 'D':
if(n==1) // if no device number is given
{
//clear device_logged array
for(int i = 0; i < MAX_DEVICES; i++)
{
device_logged[i] = false;
}
write_settings_file(log_interval, device_logged);
}
if(n == 2)
{
device_logged[device] = true;
write_settings_file(log_interval, device_logged);
}
break;
case 'f':
case 'F': //f is for "flash" for microSD
if(!SDDetect)
pc.printf("y\r\n");
else
pc.printf("n\r\n");
break;
case 'g':
case 'G':
if(n == 2)
{
//0 means get config, 1 means get log, 2 means clear log
bool fileExists = false;
if(device == 0)//get config
{
fileExists = print_settings_file();
}
if(device == 1)//get log
{
fileExists = print_log_file();
}
if(device == 2)//get log
{
clear_log_file();
fileExists = true;
}
if(!fileExists)
{
pc.printf("no_file\r\n");
}
}
// read all registers command
//i.e. ("g 0 0" means readAll from device 0 "g 1 0" means readAll from device 1)
if(n == 3)
{
//device holds device number 0 means readAll command
OT07_read_register(OT07[device].I2C_address,0x00,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x00,data[0]);
OT07_read_register(OT07[device].I2C_address,0x01,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x01,data[0]);
OT07_read_register(OT07[device].I2C_address,0x04,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x04,data[0]);
OT07_read_register(OT07[device].I2C_address,0x05,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x05,data[0]);
OT07_read_register(OT07[device].I2C_address,0x06,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x06,data[0]);
OT07_read_register(OT07[device].I2C_address,0x07,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x07,data[0]);
OT07_read_register(OT07[device].I2C_address,0x08,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x08,data[0]);
OT07_read_register(OT07[device].I2C_address,0x09,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x09,data[0]);
OT07_read_register(OT07[device].I2C_address,0x0A,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x0A,data[0]);
OT07_read_register(OT07[device].I2C_address,0x0C,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x0C,data[0]);
OT07_read_register(OT07[device].I2C_address,0x10,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x10,data[0]);
OT07_read_register(OT07[device].I2C_address,0x11,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x11,data[0]);
OT07_read_register(OT07[device].I2C_address,0x12,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x12,data[0]);
OT07_read_register(OT07[device].I2C_address,0x13,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x13,data[0]);
OT07_read_register(OT07[device].I2C_address,0x14,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x14,data[0]);
OT07_read_register(OT07[device].I2C_address,0x20,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x20,data[0]);
OT07_read_register(OT07[device].I2C_address,0x21,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x21,data[0]);
//OT07_read_register(OT07[device].I2C_address,0x30,data,1);
//pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x30,data[0]);
OT07_read_register(OT07[device].I2C_address,0x31,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x31,data[0]);
OT07_read_register(OT07[device].I2C_address,0x32,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x32,data[0]);
OT07_read_register(OT07[device].I2C_address,0x33,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x33,data[0]);
OT07_read_register(OT07[device].I2C_address,0x34,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x34,data[0]);
OT07_read_register(OT07[device].I2C_address,0x35,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x35,data[0]);
OT07_read_register(OT07[device].I2C_address,0x36,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x36,data[0]);
//OT07_read_register(OT07[device].I2C_address,0x37,data,1);
//pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0x37,data[0]);
OT07_read_register(OT07[device].I2C_address,0xFF,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,0xFF,data[0]);
}
break;
case 'i':
case 'I': //Set Logging sample intreval in seconds
log_interval = device;
if(log_interval < 1)log_interval = 1;
if(log_interval > 60)log_interval = 60;
write_settings_file(log_interval, device_logged);
break;
case 'l':
case 'L':
/*
// Toggle logging
if(log_flag == false){ //start logging
if(SDDetect)//if SD card not detected
{
error_flag = true;
error_ticks = 6;
log_flag = false;
}
else
{
FILE *fp = fopen(log_file, "a");
if (fp != NULL)
{
fprintf(fp, "Time(s)");
for(j=0;j<device_count;j++)
{
fprintf(fp,",Device %d Temperature (C)",j);
}
fprintf(fp,"\r\n");
fclose(fp);
}
time_count = 0;
time_to_sample = 0; // force sample at time = 0;
tick_flag = true; // force sample at time = 0;
log_flag = true;
}
}else{
//pc.printf("<stop logging>\r\n");
log_flag = false;
}*/
break;
case 'r':
case 'R':
//read register "r device radd.start radd.end"
if(n==3){ //read single register from selected device
OT07_read_register(OT07[device].I2C_address,arg1,data,1);
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,arg1,data[0]);
}
if(n==4){ //read a range of regesters from selected device
num_bytes = arg2-arg1 + 1; // calculate number of bytes to read
if (num_bytes < 1) num_bytes = 1; // if arg2 <= arg 1 just read arg1 address.
OT07_read_register(OT07[device].I2C_address,arg1,data,num_bytes);
for(i=0;i<num_bytes;i++){
pc.printf("device[%02X] add[%02X] data[%02X]\r\n",device,arg1+i,data[i]);
}
}
break;
case 's':
case 'S':
// ****************** search for I2C devices on bus *****************
device_count = search_I2C_bus(OT07);
pc.printf("%d devices:\r\n", device_count);
for(j=0;j<device_count;j++){
pc.printf("device[%02X] addr[%02X] unique id[",j, OT07[j].I2C_address);
for(i=ID_LENGTH-1;i>=0;i--){
pc.printf("%02X",OT07[j].rom_id[i]);
}
pc.printf("]\r\n");
}
break;
case 'T':
case 't':
if(n == 2){//get temperatures from selected device
convert_temperature(OT07[device].I2C_address); //send OW convert selected device
wait_ms(CONVERT_T_DELAY); //wait 20 ms for convert temperature to complete
T[device] = get_temperature(OT07[device].I2C_address);
pc.printf("device[%02X] temperature[%.3f] status[%d]\r\n",device,T[device].tempC, T[device].status);
}
if(n == 3){ // "t 1 3" get temperature for devices 1 thru 3
//sprintf(str,"%x",arg1); //convert arg1 input as hex to decimal i.e. 0x10 becomes 10 dec
//sscanf(str,"%d",&arg1);
//IS THIS NEEDED? ^^^
for(j=device;j<=arg1;j++){
convert_temperature(OT07[j].I2C_address); //send convert to all devices
wait_ms(CONVERT_T_DELAY); //wait 20ms for convert temperature to complete
T[j] = get_temperature(OT07[j].I2C_address);
}
for(j=device;j<=arg1;j++){
pc.printf("device[%02X] temperature[%.3f] status[%d]\r\n",j,T[j].tempC, T[j].status);
}
}
break;
case 'w':
case 'W': //write register "w device w.addr data"
OT07_write_register(OT07[device].I2C_address,arg1, arg2);
pc.printf("write -- device[%02X] add[%02X] data[%02X]\r\n",device,arg1,arg2);
break;
case 'x':
case 'X': // experimental modes
break;
}//end switch(c)
}//if(n>0)
}//end if(CR)
if(rx_buff[rx_index] == BS){//backspace received, back up buffer pointer
if(rx_index>0)rx_index--;//remove last char from buffer if not at start.
}else rx_index++;
}//end while(pc.redable())
wait_ms(100); // slow down polling
}// end (while tick == false)
tick_flag = false; // set to false for next time
// only reached when tick_flag = true otherwise stuck in pc.readable() loop
if(log_flag == true){
if(time_count >= time_to_sample){ //take next sample
time_to_sample += log_interval; // calculate time for next sample
for(j=0;j<device_count;j++){
convert_temperature(OT07[j].I2C_address);
wait_ms(CONVERT_T_DELAY); //wait 20ms for convert temperature to complete
T[j] = get_temperature(OT07[j].I2C_address);
}
/////////////////////////////////////////////////////////////////////////////////////////////////
//open file for microSD logging
FILE *fp = fopen(log_file, "a");
if (fp != NULL)
{
//fprintf(fp, "\n");
fprintf(fp, "%d",time_count);
for(j=0;j<device_count;j++)
{
if(device_logged[j])
{
if(T[j].status == DEVICE_ACK)
fprintf(fp,",%.3f",T[j].tempC);
else
fprintf(fp,",---.---");
}
}
fprintf(fp,"\r\n");
fclose(fp);
}
}// end if(time_count >= time_to_sample)
time_count ++; //
}// end if(log_flag)
}//end while(1)
}