DCS_TEAM / GSM_PUSHING_BOX_STATE_MACHINE

uses pushing box to publish to google spreadsheets with a state machine instead of a while loop

Fork of GSM_Library by DCS_TEAM

GSMLibrary.cpp@29:bc5f53f2922a, 2015-04-25 (annotated)

Committer:
es_marble
Date:
Sat Apr 25 15:39:00 2015 +0000
Revision:
29:bc5f53f2922a
Parent:
28:81f1c8bd3299
Child:
30:421aae087064
Finish adding comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
es_marble 24:7d2ff444d6d8 1 //Libraries
danilob 0:41904adca656 2 #include "GSMLibrary.h"
danilob 0:41904adca656 3 #include "gsmqueue.h"
danilob 2:8352ad91f2ee 4 #include <string.h>
danilob 0:41904adca656 5
es_marble 24:7d2ff444d6d8 6 //Global defines
es_marble 29:bc5f53f2922a 7 #define TIMEOUTLIMIT SECONDS_TIMEOUT/TIME_CONST //Defines how many "ticks" of the GSM will constitute "timeout" of our "watchdog timer"
danilob 0:41904adca656 8
es_marble 24:7d2ff444d6d8 9 //Extra defines for transmitter
es_marble 24:7d2ff444d6d8 10 #define START_SMS_TRANSMISSION "START"
es_marble 24:7d2ff444d6d8 11 #define STOP_SMS_TRANSMISSION "STOP"
es_marble 24:7d2ff444d6d8 12 #define GPS_SMS_TRANSMISSION "GPS"
es_marble 24:7d2ff444d6d8 13 #define RECEIVER_PHONE_NUMBER "\"+13853357314\""
es_marble 29:bc5f53f2922a 14 #define AT_CMGS "AT+CMGS=" RECEIVER_PHONE_NUMBER //Begin sending SMS with this send command and the phone number
es_marble 29:bc5f53f2922a 15 #define NUM_SIZE 25 //Size of a temporary variable to help with concatenation of strings
es_marble 29:bc5f53f2922a 16 #define BEGIN_SENSOR_DATA "$" //$ and % are parsed by using regex by the GUI for the receiver and indicate the start and end of data received
es_marble 26:838a9d26e8e9 17 #define END_SENSOR_DATA "%"
es_marble 24:7d2ff444d6d8 18
es_marble 29:bc5f53f2922a 19 //Define AT commands to send
es_marble 29:bc5f53f2922a 20 #define AT_OK "AT" //Ask GSM if everything is 'ok'
es_marble 29:bc5f53f2922a 21 #define AT_CSQ "AT+CSQ" //Check signal strength
es_marble 29:bc5f53f2922a 22 #define AT_CREG "AT+CREG?" //Check if GSM is registered on cellular network
es_marble 29:bc5f53f2922a 23 #define AT_CNMI "AT+CNMI=2,0,0,0,0" //Turn off the notification that is normally received when text messages are received
es_marble 29:bc5f53f2922a 24 #define AT_CMGF "AT+CMGF=1" //Turn on "text message mode" so we can characters (rather than PDU mode in which you send bytes)
es_marble 29:bc5f53f2922a 25 #define AT_READ_MSG "AT+CMGL=\"REC UNREAD\"" //Read received messages that have not yet been read
es_marble 29:bc5f53f2922a 26 #define AT_DEL_R_MSGS "AT+QMGDA=\"DEL READ\"" //Delete read messages
danilob 22:a5adf9331032 27
es_marble 29:bc5f53f2922a 28 //Define expected responses for AT commands
danilob 0:41904adca656 29 //Please notice that after ":" the gsm will usually send aditional information
danilob 0:41904adca656 30 #define AT_OK_RESPONSE "OK" //Response after sending "AT" message
es_marble 6:3ccc86304c2c 31 #define AT_CSQ_RESPONSE "+CSQ:" //+CSQ: <arg1>,<arg2> where <arg1> is signal strength arg1 = 0-30 where a number below 10 means low signal strength and 99 is not knwn or detectable signal and arg2 is bit error rate form 0-7, 99 will represent error
danilob 13:9ac5ff131214 32 #define AT_CREG_RESPONSE "+CREG:"//+CREG: <arg1>,<arg2> where <arg1> = 0-2(see AT command descriptions), <arg2> = 0-5, 0 not registered to nework and not looking for one. 1 is conected to network, 2 is not conected but searching
es_marble 24:7d2ff444d6d8 33 #define AT_CNMI_RESPONSE "OK"
danilob 0:41904adca656 34 #define AT_CMGF_RESPONSE "OK"
es_marble 24:7d2ff444d6d8 35 #define AT_CMGS_RESPONSE ">" //Received after you give the GSM the phone number. (We mistakenly thought it was received a second time after SMS was sent... this is not true!)
es_marble 29:bc5f53f2922a 36 #define AT_SENDSMS_RESPONSE "+CMGS:" // +CMGS: <id> this will include the message id, or CMS ERROR for error.
es_marble 24:7d2ff444d6d8 37 #define AT_DEL_R_MSGS_RESPONSE "OK"
danilob 0:41904adca656 38
es_marble 16:6807d437cd48 39 //External variables
es_marble 29:bc5f53f2922a 40 extern Serial pc; //To print output to computer
es_marble 29:bc5f53f2922a 41 extern Serial gsm; //To communicate with GSM
es_marble 29:bc5f53f2922a 42 extern uint8_t buffer[BUFFER_LENGTH]; //DMA queue
es_marble 16:6807d437cd48 43
es_marble 16:6807d437cd48 44 //Internal variables
danilob 0:41904adca656 45 gsm_states gsm_current_state = GSM_INITIALIZE;
danilob 12:f3ccc43c4d3c 46 int timeout_count = 0;
es_marble 29:bc5f53f2922a 47 char state_chars[] = "iosntmRPWD"; //For debugging - 1 char to represent each state: init, ok, signalstrength, network, turn off notifications, messagemode, read, phone, writesms, del
es_marble 24:7d2ff444d6d8 48
es_marble 24:7d2ff444d6d8 49 //Extras for transmitter
es_marble 24:7d2ff444d6d8 50 char send = false; //if true => we will send something (only if send_enable is true)
es_marble 29:bc5f53f2922a 51 char send_enable = false; //Sending start and stop commands to GSM via SMS changes this variable. If true, we will send SMS messages of our data received
es_marble 24:7d2ff444d6d8 52 char undeleted_msgs = true; //At the beginning assume we have undeleted messages
es_marble 29:bc5f53f2922a 53 char gsm_msg[MAX_SMS_LENGTH + 250]; //String storing SMS message that will be sent (add 250 length to give leeway)
es_marble 29:bc5f53f2922a 54 char num[NUM_SIZE]; //Temporary string storage to help with concatenation of strings
danilob 0:41904adca656 55
es_marble 29:bc5f53f2922a 56 //"Tick" of the GSM (i.e. this is a state machine)
es_marble 16:6807d437cd48 57 void gsm_tick()
es_marble 16:6807d437cd48 58 {
es_marble 29:bc5f53f2922a 59 //Don't do anything, unless i) we received a response from the GSM, ii) the watchdog timer timed out, or iii) or we are initializing the GSM
es_marble 24:7d2ff444d6d8 60 if (queueHasResponse() || gsm_timeOut() || gsm_current_state == GSM_INITIALIZE)
es_marble 16:6807d437cd48 61 {
es_marble 27:fe1c7eaf5b88 62 //gsm_printState(); //&debug
es_marble 27:fe1c7eaf5b88 63 //printQueue(); //&debug
es_marble 16:6807d437cd48 64 gsm_nextStateLogic(); //Next state
es_marble 29:bc5f53f2922a 65 gsm_mealyOutputs(); //Mealy outputs. This state machine is a little different because Mealy outputs come after the next state logic
es_marble 16:6807d437cd48 66 }
es_marble 16:6807d437cd48 67 }
es_marble 29:bc5f53f2922a 68
es_marble 29:bc5f53f2922a 69 //Prints the current state. To save time printing, simply prints 1 character to indicate the current state.
es_marble 24:7d2ff444d6d8 70 void gsm_printState()
es_marble 24:7d2ff444d6d8 71 {
es_marble 24:7d2ff444d6d8 72 pc.printf("S:%c;", state_chars[gsm_current_state]);
es_marble 24:7d2ff444d6d8 73 }
es_marble 24:7d2ff444d6d8 74
es_marble 16:6807d437cd48 75 //Advance timeout counter; if timeout, return true
es_marble 16:6807d437cd48 76 bool gsm_timeOut()
es_marble 16:6807d437cd48 77 {
es_marble 16:6807d437cd48 78 if(++timeout_count >= TIMEOUTLIMIT){
es_marble 24:7d2ff444d6d8 79 timeout_count = 0;
es_marble 24:7d2ff444d6d8 80 gsm_reset();
es_marble 16:6807d437cd48 81 return true;
danilob 15:19ae032e2e54 82 }
es_marble 16:6807d437cd48 83 else
es_marble 16:6807d437cd48 84 return false;
es_marble 16:6807d437cd48 85 }
es_marble 16:6807d437cd48 86
es_marble 24:7d2ff444d6d8 87 //Have the GSM send data - L = long, S = short, hh/mm/ss for time, "lat ns" for latitute, "lon we" for longitude
es_marble 24:7d2ff444d6d8 88 void gsm_send_data(float L, float Lref, float S, float Sref, int hh, int mm, int ss, float lat, char ns, float lon, char we)
es_marble 18:7642909bfcfc 89 {
es_marble 24:7d2ff444d6d8 90 if (!gsm_ready()) //Don't send if gsm not ready
es_marble 24:7d2ff444d6d8 91 return;
es_marble 24:7d2ff444d6d8 92
es_marble 26:838a9d26e8e9 93 //Concatenate data
es_marble 24:7d2ff444d6d8 94 gsm_msg[0] = NULL;
es_marble 26:838a9d26e8e9 95 strcat(gsm_msg, BEGIN_SENSOR_DATA);
es_marble 24:7d2ff444d6d8 96 snprintf(num, NUM_SIZE, "%f,", L);
es_marble 24:7d2ff444d6d8 97 strcat(gsm_msg, num);
es_marble 24:7d2ff444d6d8 98 snprintf(num, NUM_SIZE, "%f,", Lref);
es_marble 24:7d2ff444d6d8 99 strcat(gsm_msg, num);
es_marble 24:7d2ff444d6d8 100 snprintf(num, NUM_SIZE, "%f,", S);
es_marble 24:7d2ff444d6d8 101 strcat(gsm_msg, num);
es_marble 26:838a9d26e8e9 102 snprintf(num, NUM_SIZE, "%f,", Sref);
es_marble 24:7d2ff444d6d8 103 strcat(gsm_msg, num);
es_marble 29:bc5f53f2922a 104 snprintf(num, NUM_SIZE, "%d:%d:%d,", hh, mm, ss); //If there is no data from GPS, the time will just be "0:0:0" (that is okay)
es_marble 26:838a9d26e8e9 105 strcat(gsm_msg, num);
es_marble 29:bc5f53f2922a 106 if (ns != NULL) //If there is a gps fix (i.e. the gps has data on our location), ns will be set
es_marble 24:7d2ff444d6d8 107 {
es_marble 29:bc5f53f2922a 108 snprintf(num, NUM_SIZE, "%.4f,%.4f", (ns == 'N') ? lat : -lat, (we == 'E') ? lon : -lon); //Use + or - rather than N/S, E/W
es_marble 24:7d2ff444d6d8 109 strcat(gsm_msg, num);
es_marble 24:7d2ff444d6d8 110 }
es_marble 29:bc5f53f2922a 111 else strcat(gsm_msg, "0,0"); //Otherwise just send 0's for latitude and longitude
es_marble 26:838a9d26e8e9 112 strcat(gsm_msg, END_SENSOR_DATA);
es_marble 24:7d2ff444d6d8 113
es_marble 24:7d2ff444d6d8 114 send = true; //Mark that we are currently sending a message
es_marble 24:7d2ff444d6d8 115 strcat(gsm_msg, SMS_END_CHAR); //Add SMS end char
es_marble 18:7642909bfcfc 116 }
es_marble 24:7d2ff444d6d8 117
es_marble 24:7d2ff444d6d8 118 //Return true if gsm is ready to send sms
es_marble 24:7d2ff444d6d8 119 //This only occurs if send = false (not currently sending a message) AND gsm received start sequence
es_marble 18:7642909bfcfc 120 bool gsm_ready()
es_marble 18:7642909bfcfc 121 {
es_marble 24:7d2ff444d6d8 122 return ((!send) && send_enable) ? true : false;
es_marble 18:7642909bfcfc 123 }
es_marble 24:7d2ff444d6d8 124
es_marble 29:bc5f53f2922a 125 //Reset the gsm. Currently this only resets the state, whether we are currently sending a message, and whether there are messages to delete.
es_marble 29:bc5f53f2922a 126 //It does not reset send_enable
es_marble 18:7642909bfcfc 127 void gsm_reset()
es_marble 18:7642909bfcfc 128 {
es_marble 29:bc5f53f2922a 129 //If we are in the middle of sending a text message, we need to "escape" out of this mode by sending the escape character
es_marble 24:7d2ff444d6d8 130 if (gsm_current_state == GSM_AT_CMGS)
es_marble 24:7d2ff444d6d8 131 sendCommand(SMS_ESCAPE_CHAR);
es_marble 24:7d2ff444d6d8 132
es_marble 18:7642909bfcfc 133 gsm_current_state = GSM_INITIALIZE;
es_marble 24:7d2ff444d6d8 134 undeleted_msgs = true;
es_marble 24:7d2ff444d6d8 135 send = false;
es_marble 18:7642909bfcfc 136 }
es_marble 24:7d2ff444d6d8 137
es_marble 16:6807d437cd48 138 //Next state logic -----------------------------------------------------
es_marble 29:bc5f53f2922a 139 //Note how each state (except init) checks the response received to make sure
es_marble 29:bc5f53f2922a 140 //GSM has properly executed the command. If the response is correct, it changes
es_marble 29:bc5f53f2922a 141 //the state so that the next command will be sent in the gsm_mealyOutputs function
es_marble 29:bc5f53f2922a 142 //below.
es_marble 16:6807d437cd48 143 void gsm_nextStateLogic()
es_marble 16:6807d437cd48 144 {
es_marble 16:6807d437cd48 145 switch(gsm_current_state)
es_marble 16:6807d437cd48 146 {
danilob 0:41904adca656 147 case GSM_INITIALIZE:
es_marble 29:bc5f53f2922a 148 timeout_count = 0; //No AT commands have been sent: this will send the first one
es_marble 29:bc5f53f2922a 149 gsm_current_state = GSM_AT_OK;
danilob 0:41904adca656 150 break;
danilob 0:41904adca656 151 case GSM_AT_OK:
es_marble 24:7d2ff444d6d8 152 if (findInQueue(AT_OK_RESPONSE, true))
es_marble 16:6807d437cd48 153 gsm_current_state = GSM_AT_CSQ;
danilob 12:f3ccc43c4d3c 154 break;
danilob 12:f3ccc43c4d3c 155 case GSM_AT_CSQ:
es_marble 24:7d2ff444d6d8 156 if(findInQueue(AT_CSQ_RESPONSE, true))
es_marble 16:6807d437cd48 157 gsm_current_state = GSM_AT_CREG;
danilob 2:8352ad91f2ee 158 break;
danilob 0:41904adca656 159 case GSM_AT_CREG:
es_marble 24:7d2ff444d6d8 160 if(findInQueue(AT_CREG_RESPONSE, true))
es_marble 16:6807d437cd48 161 {
es_marble 29:bc5f53f2922a 162 parseInt(); //After the CREG response we receive two integers. The second should be '1' (see AT_CREG_RESPONSE #define)
es_marble 24:7d2ff444d6d8 163 if(parseInt() == 1)
es_marble 24:7d2ff444d6d8 164 gsm_current_state = GSM_AT_CNMI;
danilob 12:f3ccc43c4d3c 165 }
danilob 0:41904adca656 166 break;
es_marble 24:7d2ff444d6d8 167 case GSM_AT_CNMI:
es_marble 24:7d2ff444d6d8 168 if(findInQueue(AT_CNMI_RESPONSE, true))
es_marble 24:7d2ff444d6d8 169 gsm_current_state = GSM_AT_CMGF;
es_marble 24:7d2ff444d6d8 170 break;
danilob 0:41904adca656 171 case GSM_AT_CMGF:
es_marble 24:7d2ff444d6d8 172 if(findInQueue(AT_CMGF_RESPONSE, true))
es_marble 24:7d2ff444d6d8 173 gsm_current_state = GSM_READ_MSG;
es_marble 24:7d2ff444d6d8 174 break;
es_marble 24:7d2ff444d6d8 175 case GSM_READ_MSG:
es_marble 29:bc5f53f2922a 176 if(send_enable) //If we are currently sending SMS, check if we need to stop transmission of SMS
es_marble 24:7d2ff444d6d8 177 {
es_marble 24:7d2ff444d6d8 178 if(findInQueue(STOP_SMS_TRANSMISSION, true)) //Always stop sending if stop sequence received by SMS
es_marble 24:7d2ff444d6d8 179 {
es_marble 24:7d2ff444d6d8 180 undeleted_msgs = true;
es_marble 24:7d2ff444d6d8 181 send_enable = false; //Set send_enable to indicate we will stop sending SMS
es_marble 24:7d2ff444d6d8 182 }
es_marble 24:7d2ff444d6d8 183 else if (send) //Only continue sending if we didn't find stop sequence AND user requested that we send sms
es_marble 24:7d2ff444d6d8 184 gsm_current_state = GSM_AT_CMGS; //Continue sending SMS (change state accordingly)
es_marble 24:7d2ff444d6d8 185 //Implicit: otherwise we will continue checking text messages in this state.
es_marble 24:7d2ff444d6d8 186 }
es_marble 29:bc5f53f2922a 187 else //If we are not yet sending SMS, check if we need to start transmission of SMS
es_marble 24:7d2ff444d6d8 188 {
es_marble 24:7d2ff444d6d8 189 if(findInQueue(START_SMS_TRANSMISSION, true))
es_marble 24:7d2ff444d6d8 190 {
es_marble 24:7d2ff444d6d8 191 undeleted_msgs = true;
es_marble 29:bc5f53f2922a 192 send_enable = true; //Now we are in send SMS mode: whenever 'send' variable is set to true we will send an SMS
es_marble 29:bc5f53f2922a 193 if (send) //Only begin sending a new SMS if user requested that we send SMS (i.e. there is data to send)
es_marble 24:7d2ff444d6d8 194 gsm_current_state = GSM_AT_CMGS; //Start sending SMS (change state accordingly)
es_marble 24:7d2ff444d6d8 195 }
es_marble 24:7d2ff444d6d8 196 }
danilob 0:41904adca656 197 break;
danilob 0:41904adca656 198 case GSM_AT_CMGS:
es_marble 24:7d2ff444d6d8 199 if(findInQueue(AT_CMGS_RESPONSE, true))
es_marble 16:6807d437cd48 200 gsm_current_state = GSM_AT_SENDSMS;
danilob 0:41904adca656 201 break;
danilob 0:41904adca656 202 case GSM_AT_SENDSMS:
es_marble 24:7d2ff444d6d8 203 if(findInQueue(AT_SENDSMS_RESPONSE, true))
es_marble 18:7642909bfcfc 204 {
es_marble 27:fe1c7eaf5b88 205 //pc.printf("(Wid%i)",parseInt());//&debug
es_marble 24:7d2ff444d6d8 206 timeout_count = 0; //Reset timeout count
es_marble 29:bc5f53f2922a 207 send = false; //Indicate we are done sending the text message
es_marble 24:7d2ff444d6d8 208 if (undeleted_msgs) //Check if we need to delete read messages
es_marble 29:bc5f53f2922a 209 gsm_current_state = GSM_DEL_R_MSGS; //Only delete messages if there are unread messages
es_marble 24:7d2ff444d6d8 210 else
es_marble 18:7642909bfcfc 211 {
es_marble 29:bc5f53f2922a 212 gsm_current_state = GSM_READ_MSG; //Otherwise skip the delete messages state; go read text messages again
es_marble 27:fe1c7eaf5b88 213 //pc.printf("(Dnone)");//&debug
es_marble 18:7642909bfcfc 214 }
es_marble 18:7642909bfcfc 215 }
es_marble 16:6807d437cd48 216 else
es_marble 24:7d2ff444d6d8 217 {
es_marble 27:fe1c7eaf5b88 218 //pc.printf("(Werr)"); //&debug
es_marble 24:7d2ff444d6d8 219 gsm_current_state = GSM_AT_CMGS; //If failed, try resending the message (i.e. continue until timeout)
es_marble 24:7d2ff444d6d8 220 }
danilob 0:41904adca656 221 break;
es_marble 24:7d2ff444d6d8 222 case GSM_DEL_R_MSGS:
es_marble 24:7d2ff444d6d8 223 if (findInQueue(AT_DEL_R_MSGS_RESPONSE, true))
es_marble 18:7642909bfcfc 224 {
es_marble 24:7d2ff444d6d8 225 undeleted_msgs = false;
es_marble 27:fe1c7eaf5b88 226 //pc.printf("(Dsucc)"); //&debug
es_marble 18:7642909bfcfc 227 }
es_marble 27:fe1c7eaf5b88 228 //else
es_marble 27:fe1c7eaf5b88 229 //pc.printf("(Derr)"); //&debug
es_marble 24:7d2ff444d6d8 230 gsm_current_state = GSM_READ_MSG;
danilob 0:41904adca656 231 break;
danilob 0:41904adca656 232 default:
es_marble 27:fe1c7eaf5b88 233 //pc.printf("This is a state error\r\n");
danilob 0:41904adca656 234 }
danilob 0:41904adca656 235 }
es_marble 24:7d2ff444d6d8 236
es_marble 16:6807d437cd48 237 //Mealy output logic ------------------------------------------------------
es_marble 16:6807d437cd48 238 void gsm_mealyOutputs()
es_marble 16:6807d437cd48 239 {
es_marble 16:6807d437cd48 240 switch(gsm_current_state)
es_marble 16:6807d437cd48 241 {
es_marble 16:6807d437cd48 242 case GSM_INITIALIZE:
es_marble 16:6807d437cd48 243 break;
es_marble 16:6807d437cd48 244 case GSM_AT_OK:
es_marble 24:7d2ff444d6d8 245 sendCommand(AT_OK);
es_marble 16:6807d437cd48 246 break;
es_marble 16:6807d437cd48 247 case GSM_AT_CSQ:
es_marble 24:7d2ff444d6d8 248 sendCommand(AT_CSQ);
es_marble 16:6807d437cd48 249 break;
es_marble 16:6807d437cd48 250 case GSM_AT_CREG:
es_marble 24:7d2ff444d6d8 251 sendCommand(AT_CREG);
es_marble 16:6807d437cd48 252 break;
es_marble 24:7d2ff444d6d8 253 case GSM_AT_CNMI:
es_marble 24:7d2ff444d6d8 254 sendCommand(AT_CNMI);
es_marble 24:7d2ff444d6d8 255 break;
es_marble 24:7d2ff444d6d8 256 case GSM_AT_CMGF:
es_marble 24:7d2ff444d6d8 257 sendCommand(AT_CMGF);
es_marble 24:7d2ff444d6d8 258 break;
es_marble 24:7d2ff444d6d8 259 case GSM_READ_MSG:
es_marble 24:7d2ff444d6d8 260 sendCommand(AT_READ_MSG);
es_marble 24:7d2ff444d6d8 261 break;
es_marble 16:6807d437cd48 262 case GSM_AT_CMGS:
es_marble 24:7d2ff444d6d8 263 sendCommand(AT_CMGS);
es_marble 16:6807d437cd48 264 break;
es_marble 16:6807d437cd48 265 case GSM_AT_SENDSMS:
es_marble 24:7d2ff444d6d8 266 sendCommand(gsm_msg); //end char included
es_marble 16:6807d437cd48 267 break;
es_marble 24:7d2ff444d6d8 268 case GSM_DEL_R_MSGS:
es_marble 24:7d2ff444d6d8 269 sendCommand(AT_DEL_R_MSGS);
danilob 19:a442b5a0116f 270 break;
es_marble 16:6807d437cd48 271 default:
es_marble 27:fe1c7eaf5b88 272 //pc.printf("This is a state error\r\n");
es_marble 16:6807d437cd48 273 }
es_marble 16:6807d437cd48 274 }
es_marble 29:bc5f53f2922a 275
es_marble 18:7642909bfcfc 276 //Initialize the GSM
es_marble 28:81f1c8bd3299 277 void gsm_initialize(){
es_marble 29:bc5f53f2922a 278 wait(2.3); //Wait for the GSM to turn on properly before doing this initialization
danilob 7:6c0b6ab3cafe 279 SIM_SCGC6 |= SIM_SCGC6_DMAMUX_MASK; //enabling dmamux clock
danilob 12:f3ccc43c4d3c 280 SIM_SCGC7 |= SIM_SCGC7_DMA_MASK; // enebaling dma clock
es_marble 27:fe1c7eaf5b88 281 //pc.printf("initializing DMA...\r\n");
es_marble 29:bc5f53f2922a 282 // control register mux, enabling uart3 receive
danilob 0:41904adca656 283 DMAMUX_CHCFG0 |= DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(8);
danilob 0:41904adca656 284
danilob 0:41904adca656 285 // Enable request signal for channel 0
danilob 0:41904adca656 286 DMA_ERQ = DMA_ERQ_ERQ0_MASK;
danilob 0:41904adca656 287
danilob 0:41904adca656 288 // select round-robin arbitration priority
danilob 0:41904adca656 289 DMA_CR |= DMA_CR_ERCA_MASK;
danilob 0:41904adca656 290
es_marble 29:bc5f53f2922a 291 //enable error interrupt for DMA0 (commented out because we won't use interrupts for our implementation)
es_marble 29:bc5f53f2922a 292 //DMA_EEI = DMA_EEI_EEI0_MASK;
es_marble 29:bc5f53f2922a 293
es_marble 29:bc5f53f2922a 294 //Address for buffer
danilob 0:41904adca656 295 DMA_TCD0_SADDR = (uint32_t) &UART_D_REG(UART3_BASE_PTR);
danilob 0:41904adca656 296 DMA_TCD0_DADDR = (uint32_t) buffer;
danilob 0:41904adca656 297 // Set an offset for source and destination address
danilob 0:41904adca656 298 DMA_TCD0_SOFF = 0x00;
danilob 0:41904adca656 299 DMA_TCD0_DOFF = 0x01; // Destination address offset of 1 byte per transaction
danilob 0:41904adca656 300
danilob 0:41904adca656 301 // Set source and destination data transfer size
danilob 0:41904adca656 302 DMA_TCD0_ATTR = DMA_ATTR_SSIZE(0) | DMA_ATTR_DSIZE(0);
danilob 0:41904adca656 303
danilob 0:41904adca656 304 // Number of bytes to be transfered in each service request of the channel
danilob 0:41904adca656 305 DMA_TCD0_NBYTES_MLNO = 0x01;
danilob 0:41904adca656 306 // Current major iteration count
danilob 0:41904adca656 307 DMA_TCD0_CITER_ELINKNO = DMA_CITER_ELINKNO_CITER(BUFFER_LENGTH);
danilob 0:41904adca656 308 DMA_TCD0_BITER_ELINKNO = DMA_BITER_ELINKNO_BITER(BUFFER_LENGTH);
danilob 0:41904adca656 309 // Adjustment value used to restore the source and destiny address to the initial value
danilob 0:41904adca656 310 // After reading 'len' number of times, the DMA goes back to the beginning by subtracting len*2 from the address (going back to the original address)
es_marble 16:6807d437cd48 311 DMA_TCD0_SLAST = 0; // Source address adjustment
es_marble 16:6807d437cd48 312 DMA_TCD0_DLASTSGA = -BUFFER_LENGTH; // Destination address adjustment
danilob 0:41904adca656 313 // Setup control and status register
danilob 0:41904adca656 314 DMA_TCD0_CSR = 0;
danilob 0:41904adca656 315
danilob 0:41904adca656 316 // enable interrupt call at end of major loop
danilob 0:41904adca656 317 DMA_TCD0_CSR |= DMA_CSR_INTMAJOR_MASK;
danilob 0:41904adca656 318
es_marble 29:bc5f53f2922a 319 //Activate dma transfer rx interrupt
danilob 0:41904adca656 320 UART_C2_REG(UART3) |= UART_C2_RIE_MASK;
danilob 0:41904adca656 321 UART_C5_REG(UART3) |= UART_C5_RDMAS_MASK | UART_C5_ILDMAS_MASK | UART_C5_LBKDDMAS_MASK;
es_marble 29:bc5f53f2922a 322 //activate p fifo register
danilob 0:41904adca656 323 UART_PFIFO_REG(UART3) |= UART_PFIFO_RXFE_MASK; //RXFE and buffer size of 1 word
danilob 7:6c0b6ab3cafe 324 queueInit();
es_marble 27:fe1c7eaf5b88 325 //pc.printf("done...\n\r");
danilob 0:41904adca656 326 }
es_marble 24:7d2ff444d6d8 327
es_marble 29:bc5f53f2922a 328 //For debugging: print registers related to DMA and UART setup
es_marble 29:bc5f53f2922a 329 void print_registers()
es_marble 29:bc5f53f2922a 330 {
danilob 0:41904adca656 331 pc.printf("\n\rDMA REGISTERS\n\r");
danilob 0:41904adca656 332 pc.printf("DMA_MUX: 0x%08x\r\n",DMAMUX_CHCFG0);
danilob 0:41904adca656 333 pc.printf("SADDR0: 0x%08x\r\n",DMA_TCD0_SADDR);
danilob 0:41904adca656 334 pc.printf("DADDR0: 0x%08x\r\n",DMA_TCD0_DADDR);
danilob 0:41904adca656 335 pc.printf("CITER0: 0x%08x\r\n",DMA_TCD0_CITER_ELINKNO);
danilob 0:41904adca656 336 pc.printf("BITER0: 0x%08x\r\n",DMA_TCD0_BITER_ELINKNO);
danilob 0:41904adca656 337 pc.printf("DMA_CR: %08x\r\n", DMA_CR);
danilob 0:41904adca656 338 pc.printf("DMA_ES: %08x\r\n", DMA_ES);
danilob 0:41904adca656 339 pc.printf("DMA_ERQ: %08x\r\n", DMA_ERQ);
danilob 0:41904adca656 340 pc.printf("DMA_EEI: %08x\r\n", DMA_EEI);
danilob 0:41904adca656 341 pc.printf("DMA_CEEI: %02x\r\n", DMA_CEEI);
danilob 0:41904adca656 342 pc.printf("DMA_SEEI: %02x\r\n", DMA_SEEI);
danilob 0:41904adca656 343 pc.printf("DMA_CERQ: %02x\r\n", DMA_CERQ);
danilob 0:41904adca656 344 pc.printf("DMA_SERQ: %02x\r\n", DMA_SERQ);
danilob 0:41904adca656 345 pc.printf("DMA_CDNE: %02x\r\n", DMA_CDNE);
danilob 0:41904adca656 346 pc.printf("DMA_SSRT: %02x\r\n", DMA_SSRT);
danilob 0:41904adca656 347 pc.printf("DMA_CERR: %02x\r\n", DMA_CERR);
danilob 0:41904adca656 348 pc.printf("DMA_CINT: %02x\r\n", DMA_CINT);
danilob 0:41904adca656 349 pc.printf("DMA_INT: %08x\r\n", DMA_INT);
danilob 0:41904adca656 350 pc.printf("DMA_ERR: %08x\r\n", DMA_ERR);
danilob 0:41904adca656 351 pc.printf("DMA_HRS: %08x\r\n", DMA_HRS);
danilob 0:41904adca656 352 pc.printf("DMA_TCD0_DOFF: %08x\r\n",DMA_TCD0_DOFF);
danilob 0:41904adca656 353 pc.printf("\n\rUART REGISTERS\n\r");
danilob 0:41904adca656 354 pc.printf("UART_BDH_REG: %08x\r\n",UART_BDH_REG(UART3));
danilob 0:41904adca656 355 pc.printf("UART_C1_REG: %08x\r\n",UART_C1_REG(UART3));
danilob 0:41904adca656 356 pc.printf("UART_C2_REG: %08x\r\n",UART_C2_REG(UART3));
danilob 0:41904adca656 357 pc.printf("UART_S1_REG: %08x\r\n",UART_S1_REG(UART3));
es_marble 16:6807d437cd48 358 pc.printf("UART_s2_REG: %08x\r\n",UART_S2_REG(UART3));
danilob 0:41904adca656 359 pc.printf("UART_C3_REG: %08x\r\n",UART_C3_REG(UART3));
danilob 0:41904adca656 360 pc.printf("UART_D_REG: %08x\r\n",UART_D_REG(UART3));
danilob 0:41904adca656 361 pc.printf("UART_MA1_REG: %08x\r\n",UART_MA1_REG(UART3));
danilob 0:41904adca656 362 pc.printf("UART_MA2_REG: %08x\r\n",UART_MA2_REG(UART3));
danilob 0:41904adca656 363 pc.printf("UART_C4_REG: %08x\r\n",UART_C4_REG(UART3));
danilob 0:41904adca656 364 pc.printf("UART_C5_REG: %08x\r\n",UART_C5_REG(UART3));
es_marble 16:6807d437cd48 365 pc.printf("UART_ED_REG: %08x\r\n",UART_ED_REG(UART3));
danilob 0:41904adca656 366 pc.printf("UART_MODEM_REG: %08x\r\n",UART_MODEM_REG(UART3));
danilob 0:41904adca656 367 pc.printf("UART_IR_REG: %08x\r\n",UART_IR_REG(UART3));
danilob 0:41904adca656 368 pc.printf("UART_PFIFO_REG: %08x\r\n",UART_PFIFO_REG(UART3));
danilob 0:41904adca656 369 pc.printf("UART_CFIFO_REG: %08x\r\n",UART_CFIFO_REG(UART3));
danilob 0:41904adca656 370 pc.printf("UART_SFIFO_REG: %08x\r\n",UART_SFIFO_REG(UART3));
danilob 0:41904adca656 371 pc.printf("UART_TWFIFO_REG: %08x\r\n",UART_TWFIFO_REG(UART3));
danilob 0:41904adca656 372 pc.printf("UART_TCFIFO_REG: %08x\r\n",UART_TCFIFO_REG(UART3));
danilob 0:41904adca656 373 pc.printf("UART_RWFIFO_REG: %08x\r\n",UART_RWFIFO_REG(UART3));
danilob 0:41904adca656 374 pc.printf("UART_RCFIFO_REG: %08x\r\n",UART_RCFIFO_REG(UART3));
es_marble 29:bc5f53f2922a 375 }