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/home/epimerde/documents/tc11/CanFestival-3/include/hcs12/candriver.h

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00001 /*
+00002 This file is part of CanFestival, a library implementing CanOpen Stack. 
+00003 
+00004 Copyright (C): Edouard TISSERANT and Francis DUPIN
+00005 
+00006 See COPYING file for copyrights details.
+00007 
+00008 This library is free software; you can redistribute it and/or
+00009 modify it under the terms of the GNU Lesser General Public
+00010 License as published by the Free Software Foundation; either
+00011 version 2.1 of the License, or (at your option) any later version.
+00012 
+00013 This library is distributed in the hope that it will be useful,
+00014 but WITHOUT ANY WARRANTY; without even the implied warranty of
+00015 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+00016 Lesser General Public License for more details.
+00017 
+00018 You should have received a copy of the GNU Lesser General Public
+00019 License along with this library; if not, write to the Free Software
+00020 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+00021 */
+00022 
+00023 #ifndef __CANDRIVER__
+00024 #define __CANDRIVER__
+00025 
+00026 //#include DEBUG_CAN
+00027 
+00028 #include <can.h>
+00029 #include <objdictdef.h>
+00030 
+00031 
+00032 /*
+00033 The CAN message received are stored in a fifo stack
+00034 We consider one stack for all the 5 can devices. It is a choice !
+00035 */
+00036 
+00037 /* Be free to change this value */
+00038 #define MAX_STACK_MSG_RCV 5
+00039 
+00040 /* Number of incomings and outcomings CAN Line. The layer CanOpen must be
+00041 used only for ONE line CAN. But you may used one or more CAN drivers, without
+00042 a CanOpen layer.
+00043 Only 2 lines are implemented. If more lines are needed, copy void __attribute__((interrupt)) can0HdlRcv (void) to void __attribute__((interrupt)) canXHdlRcv (void) and make 
+00044 changes : [0] to [x], CAN0 to CANX, etc
+00045 */
+00046 #define NB_LINE_CAN 1
+00047 
+00048 /* Whose hardware HCS12 CAN block is used for CanOpen ? Chose between CAN0, ..., CAN4
+00049 If you use CANOPEN_LINE_NUMBER_USED = CANI, the value of NB_LINE_CAN must be
+00050 more or equal to I + 1
+00051 Value other than CAN0 not tested, but should work fine.
+00052  */
+00053 #define CANOPEN_LINE_NUMBER_USED CAN0
+00054 
+00055 /* Stack of received messages 
+00056 MSG received on CAN0 module is stored in stackMsgRcv[0], etc
+00057 */
+00058 extern volatile Message stackMsgRcv[NB_LINE_CAN][MAX_STACK_MSG_RCV];
+00059 
+00060 
+00061 /* Copy from the stack of the message to treat */
+00062 extern Message msgRcv;
+00063 
+00064 
+00065 /* To move on the stack of messages 
+00066  */
+00067 typedef struct {
+00068   UNS8 w ; /* received */
+00069   UNS8 r ; /* To transmit */
+00070 } t_pointerStack;
+00071 
+00072 
+00073 /* Pointer for write or read a message in/from the reception stack */
+00074 extern volatile t_pointerStack ptrMsgRcv[NB_LINE_CAN];
+00075 
+00076 /* 
+00077 Parameters to define the  clock system for the CAN bus
+00078 example : 
+00079 CAN_BUS_TIME clk = {
+00080       1,  // clksrc: Use the bus clock : 16 MHz, the freq. of the quartz's board        
+00081       0,  // brp :  chose btw 0 and 63 (6 bits).  freq time quantum = 16MHz / (brp + 1) 
+00082       1,  // sjw : chose btw 0 and 3 (2 bits). Sync on (sjw + 1 ) time quantum          
+00083       1,  // samp : chose btw 0 and 3 (2 bits) (samp + 1 ) samples per bit              
+00084       4,  // tseg2 : chose btw 0 and 7 (3 bits) Segment 2 width = (tseg2 + 1)  tq       
+00085       9,  // tseg1 : chose btw 0 and 15 (4 bits) Segment 1 width = (tseg1 + 1)  tq      
+00086 
+00087       
+00088       With these values, 
+00089       - The width of the bit time is 16 time quantum :
+00090           - 1 tq for the SYNC segment (could not be modified)
+00091           - 10 tq for the TIME 1 segment (tseg1 = 9)
+00092           - 5 tq for the TIME 2 segment (tseg2 = 4)
+00093       - Because the bus clock of the MSCAN is 16 MHZ, and the 
+00094         freq of the time quantum is 16 MHZ (brp = 0), and  there are 16 tq in the bit time,
+00095         so the freq of the bit time is 1 MHz.
+00096       
+00097   };
+00098 */
+00099 typedef struct {
+00100   UNS8  clksrc;     /* use of internal clock  or clock bus        */
+00101   UNS8  brp;        /* define the bus speed                       */
+00102   UNS8  sjw;        /* Number of time quantum for synchro - 1     */
+00103   UNS8  samp;       /* Number of sample per bit (1 or 3)          */
+00104   UNS8  tseg2;      /* Width of the time segment 2 (in tq) - 1    */
+00105   UNS8  tseg1;      /* Width of the time segment 1 (in tq) - 1    */
+00106 } canBusTime;
+00107 
+00108 /* 
+00109 Parameters to init the filters for received messages
+00110 */
+00111 typedef struct {
+00112   UNS8  idam;        /* Put 0x01 for 16 bits acceptance filter    */
+00113   UNS8  canidar0;
+00114   UNS8  canidmr0;
+00115   UNS8  canidar1;
+00116   UNS8  canidmr1; 
+00117   UNS8  canidar2;
+00118   UNS8  canidmr2;
+00119   UNS8  canidar3;
+00120   UNS8  canidmr3;
+00121   UNS8  canidar4;
+00122   UNS8  canidmr4;
+00123   UNS8  canidar5;
+00124   UNS8  canidmr5; 
+00125   UNS8  canidar6;
+00126   UNS8  canidmr6;
+00127   UNS8  canidar7;
+00128   UNS8  canidmr7;  
+00129 } canBusFilterInit;
+00130 
+00131 /*
+00132 Parameters to init MSCAN
+00133 Example
+00134 CAN_BUS_INIT bi = {
+00135     0,     no low power                  
+00136     0,     no time stamp                
+00137     1,     enable MSCAN                 
+00138     0,     clock source : oscillator    
+00139     0,     no loop back                 
+00140     0,     no listen only               
+00141     0,     no low pass filter for wk up 
+00142     {
+00143       1,       Use the oscillator clock                         
+00144       0,       Quartz oscillator : freq time quantum =  freq oscillator clock / (0 + 1)
+00145       1,       Sync on (1 + 1) time quantum                            
+00146       1,       1 sample per bit                                  
+00147       4,       time segment 2 width : (4 + 1) tq                     
+00148       9,       time segment 1 width : (9 + 1) tq                     
+00149     }
+00150   };   
+00151 */
+00152 
+00153 typedef struct {
+00154   UNS8  cswai;      /* Low power/normal in wait mode   (1/0)      */
+00155   UNS8  time;       /* Timer for time-stamp enable/disable (1/0)  */
+00156   UNS8  cane;       /* Enable MSCAN (yes=1) Do it !               */
+00157   UNS8  clksrc;     /* clock source bus/oscillator (1/0)          */
+00158   UNS8  loopb;      /* loop back mode for test (yes=1/no=0)       */
+00159   UNS8  listen;     /* MSCAN is listen only (yes=1/no=0 ie normal)*/
+00160   UNS8  wupm;       /* low pas filter for wake up (yes=1/no=0)    */
+00161   canBusTime 
+00162         clk;        /* Values for clock system init               */
+00163   canBusFilterInit
+00164   fi;               /* Values for filter acceptance msg init      */
+00165   
+00166 } canBusInit;
+00167 
+00168 extern canBusInit bi;
+00169 
+00170 
+00171 
+00172 /*
+00173 For the received messsage, add a Identificator to
+00174 the list of ID to accept.
+00175 You can use several times this function to accept several messages.
+00176 It configures registers on 16 bits.
+00177 Automatically, it configure the filter to
+00178 - not accepting the msg on 29 bits (ide=1 refused)
+00179 - not filtering on rtr state (rtr = 1 and rtr = 0 are accepted)
+00180 Algo :
+00181 if CANIDARx = 0 then  CANIDARx = id . else do nothing
+00182 CANIDMRx = CANIDMRx OR (CANIDARx XOR id )
+00183 nFilter : 0 to 3
+00184 Must be in init mode before.
+00185 */
+00186 char canAddIdToFilter (
+00187                        UNS16 adrCAN,
+00188                        UNS8 nFilter,
+00189                        UNS16 id /* 11 bits, the 5 msb not used */
+00190                        );
+00191 
+00192 /*
+00193  Use this function to change the CAN message acceptance filters and masks.
+00194  */
+00195 char canChangeFilter (UNS16 adrCAN, canBusFilterInit fi);
+00196 
+00197 
+00198 /*
+00199 Enable one of the 5 MSCAN.
+00200 Must be done only one time after a reset of the CPU.
+00201 To do before any CAN initialisation
+00202 */
+00203 char canEnable (
+00204                 UNS16 adrCAN /* First address of MSCANx registers */
+00205                 );
+00206 
+00207 
+00208 /* 
+00209 Initialize one of the 5 mscan
+00210 can be done multiple times in your code
+00211 Return 0 : OK
+00212 When it return from the function,
+00213 mscan is on sleep mode with wake up disabled.
+00214       is not on init mode
+00215 */
+00216 char canInit (
+00217               UNS16 adrCAN,   /* First address of MSCANx registers  */
+00218               canBusInit 
+00219               bi       /* All the parameters to init the bus */
+00220               );
+00221 /*
+00222 Initialize the parameters of the system clock for the MSCAN
+00223 You must put the MSCAN in sleep mode before with canSleepMode()
+00224 Return 0 : OK
+00225        1 : Not in sleep mode. Unable to init MSCAN 
+00226 */
+00227 char canInitClock (
+00228                    UNS16 adrCAN, /* First address of MSCANx registers */
+00229                    canBusTime clk);
+00230 
+00231 /* 
+00232 Initialize one filter for acceptance of received msg.
+00233 Filters MUST be configured on 16 bits 
+00234 (See doc Motorola mscan bloc guide fig 4.3)
+00235 Must be in init mode before.
+00236 adrCAN  : adress of the first register of the mscan module
+00237 nFilter : the filter : 0 to 3.
+00238 ar : Value to write in acceptance register
+00239      Beware ! hight byte and low byte inverted.
+00240      for example if nFilter = 0, hight byte of ar -> CANIDAR0
+00241                                  low   byte of ar -> CANIDAR1
+00242 mr : Value to write in mask register
+00243      Beware ! hight byte and low byte inverted.
+00244      for example if nFilter = 2, hight byte of ar -> CANIDMR4
+00245                                  low   byte of ar -> CANIDMR5
+00246 */
+00247 char canInit1Filter (
+00248                      UNS16 adrCAN, 
+00249                      UNS8 nFilter,
+00250                      UNS16 ar,
+00251                      UNS16 mr
+00252                      );
+00253 
+00254 /*
+00255 Initialise the parameters for filtering the messages received.
+00256 You must put the MSCAN in init mode before with canInitMode()
+00257 Return 0 : OK
+00258        1 : Not in init mode. Unable to init MSCAN 
+00259 */
+00260 
+00261 char canInitFilter (
+00262                     UNS16 adrCAN, /* First address of MSCANx registers */
+00263                     canBusFilterInit fi);
+00264 /*
+00265 Put one of the 5 mscan in Init mode
+00266 Loop until init mode is reached.
+00267 */
+00268 
+00269 char canInitMode (
+00270                   UNS16 adrCAN /* First address of MSCANx registers */
+00271                   );    
+00272 
+00273 /*
+00274 Leave the Init mode
+00275 loop until init mode leaved.
+00276 */
+00277 
+00278 char canInitModeQ (
+00279                    UNS16 adrCAN /* First address of MSCANx registers */
+00280                    );
+00281 
+00282 
+00283 
+00284 /*
+00285 Transmit a msg on CAN "adrCan"
+00286 Return : 0      No error
+00287          other  error : no buffer available to make the transmission
+00288 */      
+00289 
+00290 char canMsgTransmit (
+00291                      UNS16 adrCAN,  /* First address of MSCANx registers */
+00292                      Message msg  /* Message to transmit                */
+00293                      );
+00294 
+00295 /*
+00296  Set the interruptions. Must be call just after having left the init mode.
+00297  */          
+00298 char canSetInterrupt (UNS16 adrCAN);                 
+00299 
+00300 /*
+00301 Put one of the 5 mscan in sleep mode
+00302 Beware! If some messages are to be sent,
+00303 or if it is receiving, going into sleep mode
+00304 may take time.
+00305 Wake up is disabled : stay in sleep mode even if
+00306 bus traffic detected.
+00307 return 0 if 0K, other if error : mscan is on init mode.
+00308 Stay in this function until the sleep mode
+00309 is reached.
+00310 */
+00311 char canSleepMode (
+00312                    UNS16 adrCAN /* First address of MSCANx registers */
+00313                    );   
+00314 
+00315 /*
+00316 Leave the sleep mode
+00317 loop until sleep mode leaved.
+00318 return 0 : OK
+00319 return 1 : error : in init mode
+00320 */
+00321 char canSleepModeQ (
+00322                     UNS16 adrCAN /* First address of MSCANx registers */
+00323                     );  
+00324 
+00325 /*
+00326 Put one of the 5 mscan in sleep mode
+00327 MSCAN must not be in init mode.
+00328 wake up is enabled : wake up if traffic on CAN is detected
+00329 Beware! If some messages are to be sent,
+00330 or if it is receiving, going into sleep mode
+00331 may take time.
+00332 Loop until sleep mode reached.
+00333 return 0 if 0K, other if error
+00334 */
+00335 char canSleepWupMode (
+00336                       UNS16 adrCAN /* First address of MSCANx registers */
+00337                       );        
+00338 
+00339 /*
+00340 Test if one of the 5 mscan is in init mode.
+00341 Return 
+00342        0     -> Not in init mode
+00343        other -> In init mode
+00344 */
+00345 char canTestInitMode (
+00346                       UNS16 adrCAN /* First address of MSCANx registers */
+00347                       );   
+00348 
+00349 /*
+00350 Test if one of the 5 mscan is in sleep mode.
+00351 Return 
+00352        0     -> Not in sleep mode
+00353        other -> In sleep mode
+00354 */
+00355 char canTestSleepMode (
+00356                        UNS16 adrCAN /* First address of MSCANx registers */
+00357                        );   
+00358 
+00359 
+00360 
+00361 #endif /*__CANDRIVER__*/
+00362 
+

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