SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
CLR_OUT_PIN(IO1,P1_SJA1000_RST_PIN);
- for (slowdown=0;slowdown<20*SJA1000_SCLK;slowdown++);
+ SJA1000_INIT_DELAY();
SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
// Due to change in design there is CS_PIN connected with ALE_PIN and ALE_PIN connection to LPC is interrupted
// CLR_OUT_PIN(IO0,P0_SJA1000_ALE_PIN);
SET_OUT_PIN(IO1,P1_SJA1000_RST_PIN);
- for (slowdown=0;slowdown<20*SJA1000_SCLK;slowdown++);
-
+ SJA1000_INIT_DELAY();
}
int can_write(uint8_t address,uint8_t* data)
SET_OUT_PIN(IO0,P0_SJA1000_RD_PIN); // Stays high on write
SET_OUT_PIN(IO0,P0_SJA1000_WR_PIN); // Stays high on address write
SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN); // Sets output buffers to third state
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
//SET_OUT_PIN(IO0,P0_SJA1000_ALE_PIN); // Start command
// Set memory address
IO1SET=__val2mfld(0x00FF0000,address); // Shift data to SJA pins and output them
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
//CLR_OUT_PIN(IO0,P0_SJA1000_ALE_PIN); // Makes address active
CLR_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
// Setting data
CLR_OUT_PIN(IO0,P0_SJA1000_WR_PIN);
IO1CLR=0x00FF0000;
IO1SET=__val2mfld(0x00FF0000,*data);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
SET_OUT_PIN(IO0,P0_SJA1000_WR_PIN); // Data should be accepted by now
SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
return 0;
}
SET_OUT_PIN(IO0,P0_SJA1000_WR_PIN); // Stays high on read
SET_OUT_PIN(IO0,P0_SJA1000_RD_PIN); // Stays high while entering address
SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
//SET_OUT_PIN(IO0,P0_SJA1000_ALE_PIN);
// Request memory address
IO1SET=__val2mfld(0x00FF0000,address);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
//CLR_OUT_PIN(IO0,P0_SJA1000_ALE_PIN);
CLR_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
IO1DIR&=~0x00FF0000; // Sets port as input
CLR_OUT_PIN(IO0,P0_SJA1000_RD_PIN);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
*data=__mfld2val(0x00FF0000,IO1PIN);
SET_OUT_PIN(IO0,P0_SJA1000_RD_PIN);
SET_OUT_PIN(IO0,P0_SJA1000_CS_PIN);
- for (slowdown=0;slowdown<SJA1000_SCLK;slowdown++);
+ SJA1000_DELAY();
return 0;
}
return 0;
}
-
-int can_autobaud(int tries){
- uint8_t data=0;
- int i=0,j,baudset=0;
- // Single acceptance filter, reset mode, listen mode for baud determination
- data=sjaMOD_LOM|sjaMOD_AFM|sjaMOD_RM;
- can_write((uint8_t)SJAMOD,(uint8_t*)&data);
- do {
- canbaud.baudrate=sja1000_freqs[i][0]*1000;
- canbaud.sjw=(sja1000_freqs[i][1]&0x3F)|(sja1000_freqs[i][2]&0xC0);
- canbaud.sample_pt=(sja1000_freqs[i][3]&0x0F)|(sja1000_freqs[i][4]&0x70);
- can_write(SJABTR0,(uint8_t *)(&canbaud.sjw));
- can_write(SJABTR1,(uint8_t *)(&canbaud.sample_pt));
- uint8_t intstor,temp;
- can_read(SJAIER,&intstor);
- temp=sjaIER_RIE|sjaIER_BEIE;
- can_write(SJAIER,&temp);
-
- /// Leave reset mode
- can_read(SJAMOD,&temp);
- temp&=~sjaMOD_RM;
- can_write(SJAMOD,&temp);
- j=0;
- do{
- can_read(SJAMOD,&temp);
- if (j++>20)
- return -1;
- } while (temp&sjaMOD_RM);
-
- /// Wait for successfull packet receive or receive error
- j=0;
- while (!(IO0PIN & P0_SJA1000_INT_PIN)){
- }
-
- can_read(SJAIR,&temp);
- if (temp & sjaIR_RI)
- baudset=1;
-
- /// Back to reset
- can_read(SJAMOD,&temp);
- temp|=sjaMOD_RM;
- can_write(SJAMOD,&temp);
- j=0;
- do{
- can_read(SJAMOD,&temp);
- if (j++>20)
- return -1;
- } while (!(temp&sjaMOD_RM));
-
- if (++i==sja1000_freq_cnt)
- return -1;
- } while (baudset==0);
- return 0;
-}
-
-int can_poll(){
-
- return 0;
-}
-
-int can_transmit_direct(uint8_t *data){
- int len=0,ext=0,i;
- uint8_t *ptr=data,tmitptr,temp;
- ext=(*ptr)& sjaFRM_FF;
- len=(*ptr)& 0xFF;
-
- // check if transmit buffer is free
- do {
- if (can_poll()==-1)
- return -1;
- can_read(SJASR,&temp);
- temp&=sjaSR_TBS;
- } while (!temp);
-
- tmitptr=SJAFRM;
- can_write(tmitptr++,data++); // Header
- can_write(tmitptr++,data++); // Ident 1
- can_write(tmitptr++,data++); // Ident 2
- if (ext){
- can_write(tmitptr++,data++); // Ident 3
- can_write(tmitptr++,data++); // Ident 4
- }
- for (i=0;i<len;i++)
- can_write(tmitptr++,data++); // Data i;
-
- // Set TR bit
- temp=sjaCMR_TR;
- can_write(SJACMR,&temp);
-
- return 0;
-}
-
-int can_transmit(int ext_header,int rtr,uint8_t *mask,int numbytes,uint8_t *data){
- uint8_t tmitptr,temp;
- int i=0;
-
- if (numbytes<0)
- numbytes=0;
-
- if (mask==NULL)
- ; // use internal mask
-
- // check if transmit buffer is free
- do {
- if (can_poll()==-1)
- return -1;
- can_read(SJASR,&temp);
- temp&=sjaSR_TBS;
- } while (!temp);
-
- tmitptr=SJAFRM;
- temp=(ext_header?sjaFRM_FF:0)|(rtr?sjaFRM_RTR:0)|(numbytes>8?0x08:numbytes);
- can_write(tmitptr++,&temp); // Header
-
- can_write(tmitptr++,mask++); // Ident 1
- can_write(tmitptr++,mask++); // Ident 2
- if (ext_header){
- can_write(tmitptr++,mask++); // Ident 3
- can_write(tmitptr++,mask++); // Ident 4
- }
- for (i=0;i<(numbytes>8?0x08:numbytes);i++)
- can_write(tmitptr++,data++); // Data i;
-
- // Set TR bit
- temp=sjaCMR_TR;
- can_write(SJACMR,&temp);
-
- return 0;
-}
-
-int can_receive(uint8_t len,uint8_t *data){
-
-
- return 0;
-}
projects / lincan.git / blobdiff