+ /* prepare write command */
+ if(lpc->info&VERBOSE)
+ printf("writing 0x%02x bytes to 0x%08x\n",len,addr);
+ snprintf(txrxbuf,BUFSIZE,"W %d %d\r\n",addr,len);
+ slen=strlen(txrxbuf);
+
+ /* send command and check return code */
+ txrx(lpc,txrxbuf,slen,TXRX_TYPE_CMD);
+
+ /* send data */
+ lcount=0;
+ bcnt=0;
+ count=0;
+ checksum=0;
+ while(bcnt<nlen) {
+
+ /* uuencode / prepare data bytes */
+ uuencode((u8 *)(buf+bcnt),(u8 *)(txrxbuf),
+ (bcnt==nlen-3)?(len%3?len%3:3):3);
+ txrxbuf[5]='\r';
+ txrxbuf[6]='\n';
+
+ /* checksum */
+ checksum+=((u8)buf[bcnt]+(u8)buf[bcnt+1]+(u8)buf[bcnt+2]);
+
+ /* send a data line */
+ txrx(lpc,txrxbuf,7,TXRX_TYPE_DATA);
+
+ /* increase counters */
+ lcount+=1;
+ bcnt+=3;
+ count+=3;
+
+ /* checksum */
+ if((!(lcount%20))|(bcnt==nlen)) {
+ /* send backtick */
+ memcpy(txrxbuf,"`\r\n",3);
+ //txrx(lpc,txrxbuf,3,TXRX_TYPE_DATA);
+ /* send checksum */
+ snprintf(txrxbuf,BUFSIZE,"%d\r\n",checksum);
+ slen=strlen(txrxbuf);
+ txrx(lpc,txrxbuf,slen,TXRX_TYPE_CKSM);
+ if(!strncmp(txrxbuf,"RESE",4)) {
+ read(lpc->sfd,txrxbuf+4,4);
+ printf("ram write: resending ...\n");
+ bcnt-=count;
+ }
+ if(strncmp(txrxbuf,"OK\r\n",4)) {
+ printf("ram write: bad response\n");
+ return -1;
+ }
+ /* reset checksum & counter */
+ checksum=0;
+ count=0;
+ }
+
+ }
+
+ return 0;
+}
+
+int send_cmd(int sfd,u32 addr,u32 len,u8 cmd) {
+
+ int ret,i,cnt,size;
+ int as,ls;
+ u8 send[9];
+
+ switch(cmd) {
+ case CMD_READ:
+ case CMD_WRITE:
+ as=4;
+ ls=4;
+ break;
+ case CMD_CHIP_ERASE:
+ as=0;
+ ls=1;
+ break;
+ default:
+ printf("send cmd: cmd '%02x' not supported\n",cmd);
+ return -1;
+ }
+
+ size=1+as+ls;
+ send[0]=cmd;
+
+ for(i=0;i<as;i++)
+ send[1+i]=(addr>>((as-1-i)*8))&0xff;
+ for(i=0;i<ls;i++)
+ send[1+i+as]=(len>>((ls-1-i)*8))&0xff;
+
+ cnt=0;
+ printf(" sending cmd: ");
+ while(size) {
+ ret=write(sfd,send+cnt,size);
+ if(ret<0) {
+ perror("dump file: send cmd ");
+ return ret;
+ }
+ for(i=cnt;i<cnt+ret;i++)
+ printf("%02x ",send[i]);
+ size-=ret;
+ cnt+=ret;
+ }
+ printf("\n");