PICO I2C FW
Dependencies: USBDevice
main.cpp
- Committer:
- cyberjoey
- Date:
- 2018-08-31
- Revision:
- 18:d913ec9dd9c2
- Parent:
- 17:401a5bb8d403
- Child:
- 19:7081d6f6288b
File content as of revision 18:d913ec9dd9c2:
#include "mbed.h" #include "SDFileSystem.h" #include "max32630fthr.h" #include "USBSerial.h" #include <ctype.h> #define PERIOD 10 // Logging period in seconds //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 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 struct OT07_struct { char rom_id[ID_LENGTH]; // device 8 byte ROM ID char I2C_address; // I2C addess, based on GPIO0 and GPIO1 at power up }; const char* settings_file = "/sd/settings.txt"; const char* log_file = "/sd/MAX30207Log.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,8); for(j=7;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 double temperature in oC //****************************************************************************** double get_temperature(char I2C_add){ char data[2]; double T; int count; OT07_read_register(I2C_add,OT07_FIFO_DATA,data,2); // Read temperature from FIFO, 2 bytes //if(DEBUG)db.printf("get_temperature -- FIFO[%02X %02X]\r\n",data[0],data[1]); //calculate temperture from data count = (int)(data[0]*256 + data[1]); if (count >= 32768)count = count - 65536; // 2s comp T = (double)count*0.005; return T; } 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; } 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 double 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; // reset DS2484 //data[0] = 0xE1; //data[1] = 0xF0; //i2c.write(DS2484_ADD,data,1,1); //i2c.read(DS2484_ADD,data,1); // ****************** search for all OW devices on bus ***************** //device_count = search_rom(rom_id_list); device_count = search_I2C_bus(OT07); /*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); }*/ 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, ROM Code\r\n"); for(j=0;j<device_count;j++) { if(device_logged[j]) { fprintf(fp,"%d,0x",j); for(i=7;i>=0;i--) { fprintf(fp,"%02X",rom_id_list[j][i]); } fprintf(fp,"\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': // 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 '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': //0 means get config, 1 means get log if(n == 2) { bool fileExists = false; if(device == 0)//get config { fileExists = print_settings_file(); //fileExists = print_settings_file_2(); } if(device == 1)//get log { fileExists = print_log_file(); } if(!fileExists) { pc.printf("no_file\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; 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 '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" 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] crc[FF FF]\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("\r\ndevice[%02X] add[%02X] data[%02X]",device,arg1+i,data[i]); } } break; case 's': case 'S': // search rom // ****************** search for I2C devices on bus ***************** //NOTE: MUST ADD I2C ADDRESS TODO 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] rom id[",j); for(i=7;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(0.02); //wait 20 ms for convert temperature to complete T[device] = get_temperature(OT07[device].I2C_address); pc.printf("device[%02X] temperature[%.3f]\r\n",device,T[device]); } 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(0.02); //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]\r\n",j,T[j]); } } 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] crc[FF FF]\r\n",device,arg1,arg2); 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); } */ 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 }// 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 ///////////////////////temp conversion and assignment to T[]////////////////////////////////////// // 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); }*/ for(j=0;j<device_count;j++){ convert_temperature(OT07[j].I2C_address); wait(0.02); //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]) { fprintf(fp,",%.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) }