Team Walter
PICO I2C FW
Dependencies: USBDevice
Diff: main.cpp
- Revision:
- 9:36ba3626aab7
- Parent:
- 6:96d8d823e292
- Child:
- 10:148da21c297e
--- a/main.cpp Fri Nov 17 20:59:27 2017 +0000
+++ b/main.cpp Fri Jun 29 17:44:11 2018 +0000
@@ -1,29 +1,1196 @@
#include "mbed.h"
-#include "max32630fthr.h"
#include "SDFileSystem.h"
+#include "max32630fthr.h"
+#include "USBSerial.h"
-MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
+
+#define I2C_ADDRESS 0x30 // DS2484 I2C address
+#define DS2484_ADD 0x30 // DS2484 I2C write address
+
+
+#define PERIOD 10 // Logging period in seconds
+
+//DS2484 Status register bits
+#define OWB 0x01 // status reg, One Wire Busy
+#define PPD 0x02 // status reg, Presence Pulse Detected
+#define SD 0x04 // status reg, Short Detected
+#define LL 0x08 // status reg, Logic Level
+#define RST 0x10 // status reg, Device Reset (DS2484 Reset)
+#define SBR 0x20 // status reg, Single Bit Result
+#define TSB 0x40 // status reg, Triplet Second Bit
+#define DIR 0x80 // status reg, Branch Direction Taken
+//DS2484 Command bytes
+#define RESET 0xF0 // DS2484 Reset
+#define SRP 0xE1 // DS2484 Set Read Pointer
+#define WDC 0xD2 // DS2484 Write Device Configuration
+#define ACP 0xC3 // DS2484 Adjust one wire Control Port
+#define OW_RESET 0xB4 // DS2484 One Wire Reset
+#define OW_SB 0x87 // One Wire Single Bit (write or read)
+#define OWWB 0xA5 // One Wire Write Byte
+#define OWRB 0x96 // One Wire Read Byte
+#define OWT 0x78 // One Wire Triplet (read 2 bits, write 1 bit)
+//One Wire Commands
+#define OW_SEARCH 0xF0 // Search Rom
+#define OW_READ 0x33 // Read Rom
+#define OW_MATCH 0x55 // Match Rom
+#define OW_SKIP 0xCC // Skip Rom
+#define OW_OD_MATCH 0x69 // Match Rom
+#define OW_OD_SKIP 0x3C // Skip Rom
+#define OW_ALARM 0xEC // Alarm Search
+// OT07 OW commands
+#define OT07_OW_CONVERT 0x44 //OT07 OW convert temperature command
+#define OT07_OW_WRITE 0xCC // OT07 OW Write Register command
+#define OT07_OW_READ 0x33 // OT07 OW Read Register command
+#define OT07_OW_RESET 0x82 // OT07 OW Soft Reset command
+//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_BITS 0x14 // OT07 Temp Seneor Setup (ADC_RES[7:6])
+#define OT07_GPIO_SETUP 0x20 // OT07 GPIO Setup, sets GPIO modes
+#define Ot07_GPIO_CTRL 0x21 // OT07 GPIO control
+#define OT07_ROM_ID 0x30 // OT07 ROM_ID address of LSB?
+
+
+#define MAX_DEVICES 64 // Maximum number of rom devices allowed
+#define ID_LENGTH 8 // Rom ID length in bytes
+
+
+#define BS 8 // ASCII Back Space
+#define CR 13 // ASCII Carriage Return
+
+//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);
+
+
+// Virtual serial port over USB
+//USBSerial pc;
+USBSerial pc(0x0B6A, 0x0042, 0x0001, true);
+
+// 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 error_flag;
+int error_ticks;
+
+//LED blink setup
DigitalOut rLED(LED1);
DigitalOut gLED(LED2);
+DigitalOut bLED(LED3);
-SDFileSystem sd(P0_5, P0_6, P0_4, P0_7, "sd"); // mosi, miso, sclk, cs
+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 take_data_flag_callback(){ // set data sample time flag
+
+ take_data_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];
+}
+
+// *****************************************************************************
+// OW_reset()
+// returns 0 no device present, 1 device present
+// *****************************************************************************
+
+int OW_reset(){
+ char data[2]; // define as minimun array size so 'data' is a pointer
+ data[0] = OW_RESET; // One Wire Reset 0xB4
+ i2c.write(DS2484_ADD,data,1,0); // write reset command to DS2484
+ wait_ms(1);
+ do{ // poll OW-busy
+ i2c.read(DS2484_ADD,data,1); // read back status byte from DS2484
+ }while(OWB & data[0]);
+ if(PPD & data[0])return 1; // Presence Pulse Detected bit true?
+ return 0; // else
+} // end OW_reset()
+
+// *****************************************************************************
+// OW_write_byte(char) takes char to send over one wire
+// returns DS2484 status byte
+// *****************************************************************************
+
+char OW_write_byte(char byte){
+
+ char data[2];
+ data[0] = 0xA5;
+ data[1] = byte;
+ i2c.write(DS2484_ADD,data,2,1);
+ i2c.read(DS2484_ADD,data,1); // read status byte
+
+ // db.printf("[%02X]",byte);
+ wait_us(700); // assumes normal speed OW write
+ return data[0]; // return DS2484 Status byte
+
+}// end OW_write_byte()
+
+
+// *****************************************************************************
+// OW_read_byte(char *, int) char* (save data pointer)
+// int (number of bytes to read)
+// returns 0x00
+//
+// assumes OW_reset, OW_match rom, and OW device register read address already sent.
+//
+// *****************************************************************************
+
+char OW_read_byte(char* a, int n){
+
+ char data[2];
+ int i;
+
+ //read n bytes of data
+ i=0;
+ do{
+ data[0] = OWRB; // send 0x96; DS2484 command, OW read byte
+ i2c.write(DS2484_ADD,data,1,0);
+ wait_us(600);
+ do{
+ i2c.read(DS2484_ADD,data,1); // read status byte and test OW-busy?
+ }while(data[0]&0x01 == 1); // status bit[0] set --> OW busy
+
+ //get byte from DS2484
+ data[0] = SRP; // send 0xE1, set read pointer
+ data[1] = 0xE1; // set read pointer address 0xE1 read OW data
+ i2c.write(DS2484_ADD,data,2,1);
+ i2c.read(DS2484_ADD,data,1); // read bytes from OW register
+
+ a[i] = data[0];
+
+ i++;
+ //pc.printf("[%02X] ",data[0]);
+ }while(i<n);
+ //for(i=0;i<n;i++) db.printf("OW_read_byte - [%2d][%02X]\r\n",i,a[i]);
+ return 0x00;
+}// end OW_read_byte()
+
+
+
+// *****************************************************************************
+// OW_match_rom(char *) pointer to device_id byte array
+// returns 0x00
+// assumes OW_reset alread sent
+// *****************************************************************************
+
+char OW_match_rom(char *device_id){
+
+ int i;
+ //Match rom
+ OW_write_byte(OW_MATCH); // send 0x55, match rom command
+ //send rom code for device
+ for(i=0;i<8;i++){
+ OW_write_byte(device_id[i]); //I2C write ow byte
+ }
+ return 0x00;
+
+}// end OW_macth_rom
+
+
+// *****************************************************************************
+// search_rom(char *) pointer to start of 2D array rom_id_list
+// returns number of devices found
+// *****************************************************************************
+
+
+int search_rom(char rom_id_list[MAX_DEVICES][ID_LENGTH]){ // searches for all device on OW bus, returns # found
+
+ int bit_num;
+ int byte_num;
+ int last_zero;
+ int last_discrep;
+ int search_dir;
+ int rom_count;
+ char byte_mask;
+ int last_device;
+ int i;
+
+ char rom_id[8]; //used in rom search
+ char data[8];
+ char crc;
+
+ //init for first search only
+ last_device = 0;
+ last_discrep = 0;
+ rom_count = 0;
+
+ for(i=0;i<8;i++)rom_id[i] = 0x00; //clear rom_id
+
+ do{ // loop for each rom search (end when last_device = 1)
+ //db.printf("\r\nsearch next rom [%2d]",rom_count);
+
+ //init variable for each search
+ bit_num = 1;
+ byte_num = 0;
+ byte_mask = 1;
+ last_zero = 0;
+
+
+ //OW reset
+ if(OW_reset()){ //returns 1 if at least one device present
+ //test if last device found
+ if(last_device!=1){ // more devices to find
+ search_dir = 0;
+ OW_write_byte(OW_SEARCH); //send 0xF0 over one wire to init search rom
+
+ do{
+ //determine search direction
+ if(bit_num < last_discrep){ //before last discrepancy
+ if((rom_id[byte_num] & byte_mask) > 0){// use last rom path
+ search_dir = 1; // last path was 1
+ }else{
+ search_dir = 0; // last path was 0
+ }
+ }else{ // at or past last discrepancy
+ if(bit_num == last_discrep){ // at last discrepancy
+ search_dir = 1; //been here before so use 1
+ }else{
+ search_dir = 0; //past last discrepancy so use 0
+ }
+ }
+
+ //write direction bit and get reply
+ data[0] = 0x78;
+ data[1] = search_dir << 7; //sets bit 7 of status reg to search_dir
+ i2c.write(DS2484_ADD,data,2,1);
+
+ wait_us(250);
+
+ //read in rom_id bits
+ i2c.read(DS2484_ADD,data,1); // read status byte
+
+ //(todo) check for no device error here
+
+ //get search direction used by triplet command
+
+ if(data[0]&0x80){ //true --> DIR bit = 1
+ search_dir = 1;
+ }else{
+ search_dir = 0;
+ }
+
+ //test for discrepancy (both 0 and 1 present at current bit number)(TSB = 0 (1's present) and SBR = 0 (0's present))
+ if(!(data[0] & 0x60)){ // true --> discrepancy exist, both TSB and SBR = 0
+ if(search_dir == 0)last_zero = bit_num;
+ }
+ if(search_dir == 1){ // write search dir to rom bit
+ rom_id[byte_num] |= byte_mask;
+ }else{
+ rom_id[byte_num] &= ~byte_mask;
+ }
+
+ //increment bit_num and byte_num if needed
+ bit_num++;
+ byte_mask <<= 1; //rotate 1 bit left
+ if(byte_mask == 0){ //if bit shifts out of byte set byte to 1
+ byte_num++; //also increnent byt num
+ byte_mask = 1;
+ }
+ // pc.printf("sdx[%d] lz[%2d] byte[%d] mask[%02X] bn[%d] ROM[%02X %02X %02X]\n\r",search_dir,last_zero,byte_num,byte_mask, byte_num, rom_id[2], rom_id[1], rom_id[0]);
+
+
+ }while(bit_num<65); //bit nun started at 1 so end after 64
+ last_discrep = last_zero;
+ if(last_discrep == 0)last_device = 1;
+ //copy rom_id into rom_id_list and calc crc of first 7 bytes
+ crc = 0x00; // reset crc8 total to 0
+ //db.printf(" -- rom id[ ");
+ for(i=7;i>=0;i--){
+ rom_id_list[rom_count][i] = rom_id[i] ;
+ //db.printf("%02X ",rom_id[i]);
+ }
+ //db.printf("]\r\n");
+ //db.printf("last_device[%2d]\r\n",last_device);
+ //db.printf("last_zero[%2d]\r\n",last_zero);
+ //db.printf("last_discrep[%2d]\r\n",last_discrep);
+
+ //clac_crc of rom ID
+ for (i=0;i<7;i++){
+ crc = calc_crc8(crc, rom_id[i]);
+ }
+ //db.printf("crc8 = [%02X]\r\n",crc);
+
+
+ rom_count++;
+ }//if(last_device..)
+ }else{//if prescent -- if no device present rom count is 0
+ return 0;
+ }
+ }while(last_device == 0);
+ return rom_count;
+}// end search_rom()
+
+// *****************************************************************************
+// alarm_search(char *) pointer to start of 2D array rom_id_list
+// returns number of devices found with alarm triggered
+// *****************************************************************************
+
+int alarm_search(char rom_id_list[MAX_DEVICES][ID_LENGTH]){ // searches for all devices with alarm triggered on OW bus, returns # found
-// main() runs in its own thread in the OS
-// (note the calls to Thread::wait below for delays)
+ int bit_num;
+ int byte_num;
+ int last_zero;
+ int last_discrep;
+ int search_dir;
+ int rom_count;
+ char byte_mask;
+ int last_device;
+ int i;
+
+ char rom_id[8]; //used in rom search
+ char data[8];
+ char crc;
+
+ //init for first search only
+ last_device = 0;
+ last_discrep = 0;
+ rom_count = 0;
+
+ for(i=0;i<8;i++)rom_id[i] = 0x00; //clear rom_id
+
+ do{ // loop for each rom search (end when last_device = 1)
+
+ //init variable for each search
+ bit_num = 1;
+ byte_num = 0;
+ byte_mask = 1;
+ last_zero = 0;
+
+
+ //OW reset
+ if(OW_reset()){ //returns 1 if at least one device present
+ //test if last device found
+ if(last_device!=1){ // more devices to find
+ search_dir = 0;
+ OW_write_byte(OW_ALARM); //send 0xEC over one wire to init alarm search
+
+ do{
+ //determine search direction
+ if(bit_num < last_discrep){ //before last discrepancy
+ if((rom_id[byte_num] & byte_mask) > 0){// use last rom path
+ search_dir = 1; // last path was 1
+ }else{
+ search_dir = 0; // last path was 0
+ }
+ }else{ // at or past last discrepancy
+ if(bit_num == last_discrep){ // at last discrepancy
+ search_dir = 1; //been here before so use 1
+ }else{
+ search_dir = 0; //past last discrepancy so use 0
+ }
+ }
+
+ //write direction bit and get reply
+ data[0] = 0x78;
+ data[1] = search_dir << 7; //sets bit 7 of status reg to search_dir
+ i2c.write(DS2484_ADD,data,2,1);
+
+ wait_us(250);
+
+ //read in rom_id bits
+ i2c.read(DS2484_ADD,data,1); // read status byte
+
+ //(todo) check for no device error here
+
+ //get search direction used by triplet command
+
+ if(data[0]&0x80){ //true --> DIR bit = 1
+ search_dir = 1;
+ }else{
+ search_dir = 0;
+ }
+
+ //test for discrepancy (both 0 and 1 present at current bit number)(TSB = 0 (1's present) and SBR = 0 (0's present))
+ if(!(data[0] & 0x60)){ // true --> discrepancy exist, both TSB and SBR = 0
+ if(search_dir == 0)last_zero = bit_num;
+ }
+ if(search_dir == 1){ // write search dir to rom bit
+ rom_id[byte_num] |= byte_mask;
+ }else{
+ rom_id[byte_num] &= ~byte_mask;
+ }
+
+ //increment bit_num and byte_num if needed
+ bit_num++;
+ byte_mask <<= 1; //rotate 1 bit left
+ if(byte_mask == 0){ //if bit shifts out of byte set byte to 1
+ byte_num++; //also increnent byt num
+ byte_mask = 1;
+ }
+
+
+ }while(bit_num<65); //bit nun started at 1 so end after 64
+ last_discrep = last_zero;
+ if(last_discrep == 0)last_device = 1;
+ //copy rom_id into rom_id_list and calc crc of first 7 bytes
+ crc = 0x00; // reset crc8 total to 0
+ //db.printf(" -- rom id[ ");
+ for(i=7;i>=0;i--){
+ rom_id_list[rom_count][i] = rom_id[i];
+ }
+
+ //clac_crc of rom ID
+ for (i=0;i<7;i++){
+ crc = calc_crc8(crc, rom_id[i]);
+ }
+
+ rom_count++;
+ }//if(last_device..)
+ }else{//if prescent -- if no device present rom count is 0
+ return 0;
+ }
+ }while(last_device == 0);
+
+ //check if rom_id from alarm search is all 1s (this means there was a presence pulse but no alarm is triggered)
+ bool bad_rom_id = true;
+ for(int i = 0; i < 7; i++)
+ {
+ if(rom_id_list[0][i] != 0xFF)
+ bad_rom_id = false; //found a byte in the rom id that isn't all 1s
+ }
+ if(bad_rom_id)
+ return 0;
+
+ return rom_count;
+}// end alarm_search()
+
+
+// ******************** write_OW_register() ********************************
+// write_OW_register(char*, int, int, char*)
+// char* pointer to rom_id
+// int start address
+// int number of bytes to write
+// char* pointer to write data location
+// returns 0 if CRC match data
+// returns -1 if CRC does not match data
+//
+// *****************************************************************************
+
+
+
+int write_OW_register(char *device_ID, int start_add, int n, char *data){
+ int i;
+ //select device
+ OW_reset();
+ OW_match_rom(device_ID);
+ //set start address
+ OW_write_byte(OT07_OW_WRITE); // send 0xCC, OW write register command for OT07
+ OW_write_byte(start_add); // send write register start address
+ OW_write_byte(n-1); // send length of bytes to write (00-> one byte)
+ for(i=0;i<n;i++){ // send n bytes of data
+ OW_write_byte(data[i]);
+ }
+ OW_read_byte(data,2); // read 2 byte CRC
+
+ // --- todo ----
+ // calculate CRC of
+ // Command + length + n bytes sent
+ // compare with 2 bytes read
+
+ return 0;
+
+}//end write_OW_register
+
+
+
+
+// ******************** read_OW_register() ********************************
+// read_OW_register(char*, int, int, char*)
+// char* pointer to rom_id
+// int start address
+// int number of bytes to read, not including CRC bytes
+// char* pointer to save data location
+// returns 0 if CRC match data
+// returns -1 if CRC does not match data
+//
+// *****************************************************************************
+
+
+
+int read_OW_register(char *device_ID, int start_add, int n, char *data){
+
+ //int i;
+ //select device
+ OW_reset();
+ OW_match_rom(device_ID);
+ //set start address
+ OW_write_byte(OT07_OW_READ); // send 0x33, OW read register command for OT07
+ OW_write_byte(start_add); // send read register start address
+ OW_write_byte(n-1); // send length of bytes to read (0 -> 1 byte)
+ OW_read_byte(data,n+2); // read n bytes plus 2 byte CRC
+
+ // debug output
+ //for(i=0;i<n+2;i++) db.printf("read_OW_register - [%2d][%02X]\r\n",i,data[i]);
+
+
+ // --- todo ----
+ // calculate CRC of
+ // Command + length + n bytes
+ // compare with last 2 bytes read
+ return 0;
+
+}//end read_OW_register
+
+int set_test_mode(char *device_id){
+ char data[4];
+
+ // enter test mode
+ OW_reset();
+ OW_match_rom(device_id); // match ROM
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0xFF); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x54); // first half of test mode pass code
+ OW_read_byte(data,2); // read 2 byte CRC
+
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0xFF); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x4D); // second half of test mode pass code
+ OW_read_byte(data,2); // read 2 byte CRC
+
+ // set ADC_ENABLED
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0x81); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x04); // ADC_ENABLED code
+ OW_read_byte(data,2); // read 2 byte CRC
+
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0x98); // device register address
+ OW_write_byte(0x05); // number of bytes to write -1
+ OW_write_byte(0x40); // add 98 data 40
+ OW_write_byte(0xD4); // add 99 data D4
+ OW_write_byte(0xE0); // add 9A data E0
+ OW_write_byte(0xB3); // add 9B data B3
+ OW_write_byte(0x09); // add 9C data 09
+ OW_write_byte(0xBA); // add 9D data BA
+ OW_read_byte(data,2); // read 2 byte CRC
+
+
+ //OTP copy
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0x80); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x82); //
+ OW_read_byte(data,2); // read 2 byte CRC
+
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0x80); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x02); //
+ OW_read_byte(data,2); // read 2 byte CRC
+
+
+ OW_reset();
+ OW_match_rom(device_id);
+ OW_write_byte(OT07_OW_WRITE); // device write register command
+ OW_write_byte(0xFF); // device register address
+ OW_write_byte(0x00); // number of bytes to write -1
+ OW_write_byte(0x00); // exit Test mode
+ OW_read_byte(data,2); // read 2 byte CRC
+ return 0;
+}// end set_test_mode()
+
+
+
+// ******************** convert_temperature() ********************************
+// convert_temperature()
+// returns 0
+// dose not block for 0.75 seconds.
+// *****************************************************************************
+
+int convert_temperature(){ // convert sent to all OW devices
+
+ char data[8];
+ OW_reset();
+
+ OW_write_byte(OW_SKIP); // send 0xCC, skip rom command
+
+ // activate strong pullup
+ data[0] = WDC; // send 0xD2 Write Device Configuration
+ data[1] = 0xA5; // 1010 0101 b strong and active pullup on
+ i2c.write(DS2484_ADD,data,2,0);
+
+ //convert command
+ OW_write_byte(OT07_OW_CONVERT); // send 0x44, Convert Temperature
+ OW_read_byte(data,2); // read 2 byte CRC
+ return 0;
+}
+
+
+// ******************** convert_temperature() ********************************
+// convert_temperature(char *) takes 8 byte rom_id as input
+// returns 0
+// dose not block for 0.75 seconds.
+// *****************************************************************************
+
+int convert_temperature(char *device_id){
+
+ char data[8];
+ OW_reset();
+ OW_match_rom(device_id); // send device id
+
+ // activate strong pullup
+ data[0] = WDC; // send 0xD2 Write Device Configuration
+ data[1] = 0xA5; // 1010 0101 b strong and active pullup on
+ i2c.write(DS2484_ADD,data,2,0);
+
+ //convert command
+ OW_write_byte(OT07_OW_CONVERT); // send 0x44, Convert Temperature
+ OW_read_byte(data,2); // read 2 byte CRC
+ return 0;
+}
+
+//************************ get_temperature() *********************************
+// get_temperature(char *) takes 8 byte rom_id as input
+// returns double temperature in oC
+//******************************************************************************
+
+double get_temperature(char *device_id){
+
+ char t[4];
+ double T;
+ int count;
+ // char data[2];
+
+ read_OW_register(device_id,OT07_FIFO_DATA,0x02,t); // Read temperature from FIFO, 2 bytes
+ //db.printf("get_temperature -- FIFO[%02X %02X] CRC[%02X %02X]\r\n",t[0],t[1],t[2],t[3]);
+ //calculate temperture from data
+ count = (int)(t[0]*256 + t[1]);
+ if (count >= 32768)count = count - 65536; // 2s comp
+ T = (double)count*0.005;
+
+ //db.printf("T = %f count[%5d]\r\n", T,count);
+ return T;
+}// end get_temperature()
+
+
+//******************************************************************************
+// main()
+//******************************************************************************
+
+
int main()
{
+
+ 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
+
+ double T[MAX_DEVICES];
+
+ // 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;
+
+ //************* init ticker timer callbacks ****************
+ timer_1.attach(&LED_blink_callback,1.0); //start ticker, once per sec.
+
+
+ i2c.frequency(400000); //set I2C clock to 100kHz
+
+ //wait(1); //wait 1 sec for USB serial port to init.
+
+ //db.printf("--- OT07 - Base Logger Firmware uisng DS2484 bridge V0.2 ---\r\ndaplink serial port\r\n");
+ //pc.printf("--- OT07 - Base Logger Firmware uisng DS2484 bridge V0.2 ---\r\nmicro USB serial port\r\n");
+
+ rLED = LED_OFF;
gLED = LED_ON;
- rLED = LED_ON;
+ bLED = LED_ON;
+
+
+ // reset DS2484
+ data[0] = 0xE1;
+ data[1] = 0xF0;
+ i2c.write(DS2484_ADD,data,1,1);
+ i2c.read(DS2484_ADD,data,1);
+
+ //db.printf("DS2484 Reset --> status[%02X]\r\n",data[0]);
+
+ // ****************** search for all OW devices on bus *****************
+
+ device_count = search_rom(rom_id_list);
+
+ // print out rom codes found
+ /*pc.printf("\r\nsearch rom\r\n");
+ for(j=0;j<device_count;j++){
+ //pc.printf("device[%02X] rom id[ ",j);
+ for(i=7;i>=0;i--){
+ pc.printf("%02X",rom_id_list[j][i]);
+ }
+ pc.printf("]\r\n");
+ }
+ pc.printf("\r\n");*/
+
+ for(j=0;j<device_count;j++){
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[j][k]; // get device_id from rom_id_list
+ }
+ set_test_mode(device_id);
+ //db.printf("device[%2X] in test mode\r\n",j);
+ }
+
+
+ rx_index = 0; //character buffer index for input from PC
+
+ button.fall(&btn_pressed);
+
+ //db.printf("start Main loop\r\n");
+ //db.printf("tf[%d]\r\n",tick_flag);
+ while(1) { // start main loop, take data if logging, check for input, repeat
+
+ 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
+ {
+ FILE *fp = fopen("/sd/MAX30207Log.csv", "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;
+ }
+ button_flag = false;
+ }
- FILE *fp = fopen("/sd/myfile.txt", "w");
- fprintf(fp, "Hello World!\n");
- fclose(fp);
- rLED = LED_OFF;
+ 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();
+ //pc.putc(rx_buff[rx_index]); //echo character
+ //pc.printf("<[%02x] %c i[%d]>",rx_buff[i],rx_buff[i],i); //echo charater
+
+
+ if(rx_buff[rx_index] == CR){
+ //db.printf("\r\n");
+ pc.printf("\r\n");
+ rx_buff[++rx_index] = 0;
+ //db.printf("%s\r\n",rx_buff);
+ //pc.printf("%s\r\n",rx_buff);
+ 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);
+
+ //db.printf("c[%c] d[%d] a1[%x] a2[%x] n[%d]\r\n",c,device,arg1,arg2,n); //echo values read in
+ //process input
+ if(n > 0){//got input so process it
+ switch(c){
+ case 'a':
+ case 'A': // alarm search
+ // ****************** search for all OW devices with alarm triggered on bus *****************
+
+ device_count = alarm_search(rom_id_list);
+
+ pc.printf("%d devices:\r\n", device_count);
+ for(j=0;j<device_count;j++){
+ pc.printf("device[%02X] rom id[",j);
+ for(i=7;i>=0;i--){
+ pc.printf("%02X",rom_id_list[j][i]);
+ }
+ pc.printf("]\r\n");
+ }
+ 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 '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;
+ 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("/sd/MAX30207Log.csv", "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 'P':
+ case 'p': // power down One Wire buss
+ if(n == 2){
+ if (device == 0){ // power down mode ON.
+ data[0] = WDC; // 0xD2 Write Device Config
+ data[1] = 0xD2; // 1101 0010 set 1WS = 0, SPU = 0, PDN = 1, APU = 0
+ i2c.write(DS2484_ADD,data,2,0);
+ pc.printf("<Power down DQ>\r\n");
+ }else{ // power down mode OFF
+ data[0] = WDC; // 0xD2 Write Device Config
+ data[1] = 0xE1; // 1110 0001 set 1WS = 0, SPU = 0, PDN = 0, APU = 1
+ i2c.write(DS2484_ADD,data,2,0);
+ pc.printf("<Power up DQ>\r\n");
+ }
+ }
+ break;
+ case 'r':
+ case 'R': //read register "r device radd.start radd.end"
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[device][k]; // get device_id from rom_id_list
+ }
+ if(n==3){ //read single register from selected device
+ read_OW_register(device_id,arg1,1,data);
+ pc.printf("device[%02X] add[%02X] data[%02X] crc[%02X %02X]\r\n",device,arg1,data[0],data[1],data[2]);
+ }
+ 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.
+ read_OW_register(device_id,arg1,num_bytes,data);
+ for(i=0;i<num_bytes;i++){
+ pc.printf("\r\ndevice[%02X] add[%02X] data[%02X]",device,arg1+i,data[i]);
+ }
+ pc.printf(" crc[%02X %02X]\r\n",data[i],data[i+1]);
+ }
+ break;
+
+ case 's':
+ case 'S': // search rom
+ // ****************** search for all OW devices on bus *****************
+
+ device_count = search_rom(rom_id_list);
+
+ // print out rom codes found
+ //pc.printf("\r\nsearch rom\r\n");
+ pc.printf("%d devices:\r\n", device_count);
+ for(j=0;j<device_count;j++){
+ pc.printf("device[%02X] rom id[",j);
+ for(i=7;i>=0;i--){
+ pc.printf("%02X",rom_id_list[j][i]);
+ }
+ pc.printf("]\r\n");
+ }
+ //pc.printf("\r\n");
+ break;
+
+ case 'T':
+ case 't':
+ if(n == 2){//get temperatures from selected device
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[device][k]; // get device_id from rom_id_list
+ }
+ convert_temperature(device_id); //send OW convert selected device
+ wait(0.02); //wait 20 ms for convert temperature to complete
+ T[0] = get_temperature(device_id);
+ pc.printf("device[%02X] temperature[%.3f]\r\n",device,T[0]);
+ //pc.printf("\r\n");
+ }
+ if(n == 3){ // "t 1 5" get temperature for devices 1 thru 5
+
+ convert_temperature(); //send OW convert to all devices
+ wait(0.02); //wait 750 ms for convert temperature to complete
+ for(j=device;j<=arg1;j++){
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[j][k]; // get device_id from rom_id_list
+ }
+ pc.printf("device[%02X] temperature[%.3f]\r\n",j,get_temperature(device_id));
+ }
+ //pc.printf("\r\n");
+ }
+ break;
+
+ case 'w':
+ case 'W': //write register "w device w.addr data"
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[device][k]; // get device_id from rom_id_list
+ }
+ data[0] = arg2;
+ write_OW_register(device_id, arg1, 1, data);
+
+ pc.printf("write -- device[%02X] add[%02X] data[%02X] ",device,arg1,arg2);
+
+ // get CRC
+ //OW_read_byte(data,2);
+ pc.printf("crc[%02X %02X]\r\n",data[0],data[1]);
+
+ break;
+
+ case 'x':
+ case 'X': // experimental modes
+ // ****************** set up ADC enabled in test mode*****************
+ pc.printf("<set ADC_ENABLED in test mode>\r\n");
+
+ for(j=0;j<device_count;j++){
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[j][k]; // get device_id from rom_id_list
+ }
+ set_test_mode(device_id);
+ //db.printf("device[%2X] in test mode\r\n",j);
+ }
+ 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(0.1); // slow down polling
- while (true) {
- gLED = !gLED;
- Thread::wait(500);
- }
+ }// 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){
+ //pc.printf("tc{%5d] tts[%5d]\n\r",time_count,time_to_sample);
+ if(time_count >= time_to_sample){ //take next sample
+ time_to_sample += log_interval; // calculate time for next sample
+
+ // start conversion
+ convert_temperature();
+ wait(0.02); //wait 20ms for convert to complete
+ for(j=0;j<device_count;j++){
+ for(k=0;k<8;k++){
+ device_id[k] = rom_id_list[j][k]; // get device_id from rom_id_list
+ }
+ T[j] = get_temperature(device_id);
+ }
+ /*
+ // print out time count and temperatures
+ pc.printf("%5d",time_count);
+ for(j=0;j<device_count;j++){
+ pc.printf(", %7.3f",T[j]);
+ }
+ pc.printf("\r\n");
+ */
+ FILE *fp = fopen("/sd/MAX30207Log.csv", "a");
+ if (fp != NULL)
+ {
+ //fprintf(fp, "\n");
+ fprintf(fp, "%5d",time_count);
+ for(j=0;j<device_count;j++)
+ {
+ fprintf(fp,", %7.3f",T[j]);
+ }
+ fprintf(fp,"\r\n");
+
+ fclose(fp);
+ }
+ }// end if(time_count >= time_to_sample)
+ time_count ++; //
+
+ }// end if(log_flag)
+
+ }//end while(1)
}