1.读写SN 比较简单，直接传字符串即可
extern "C" JNIEXPORT jstring JNICALL Java_com_serialno_ReadWriteSerialNo_read(JNIEnv *env, jclass type){ static char sn_buf_idb[SERIALNO_BUF_LEN] = {0}; uint32 i; int ret ; uint16 len; struct rk_vendor_req req; memset(sn_buf_idb,0,sizeof(sn_buf_idb)); int sys_fd = open("/dev/vendor_storage",O_RDONLY,0); if(sys_fd < 0){ LOGD("vendor_storage open fail\n"); goto try_drmboot; } req.tag = VENDOR_REQ_TAG; req.id = VENDOR_SN_ID; req.len = RKNAND_SYS_STORGAE_DATA_LEN; /* max read length to read*/ ret = ioctl(sys_fd, VENDOR_READ_IO, &req); close(sys_fd); if (DEBUG_LOG) //rknand_print_hex_data("vendor read:", (uint32*)req.data, req.len/4 + 3); /* return req->len is the real data length stored in the NV-storage */ if(ret){ LOGD("vendor read error\n"); goto try_drmboot; } //get the sn length len = req.len; if(len > 30) { len =30; } if(len <= 0) { goto try_drmboot; } memcpy(sn_buf_idb,req.data,len); if (DEBUG_LOG) LOGD("vendor read sn_buf_idb:%s\n",sn_buf_idb); return 0; try_drmboot: LOGD("----vendor read sn error,try drmboot----"); //rknand_sys_storage_test_sn(); return 0; } extern "C" JNIEXPORT jint JNICALL Java_com_serialno_ReadWriteSerialNo_write(JNIEnv *env, jclass type,jstring sn){ int fd; int ret = 0; int len = 0; struct rk_vendor_req req; struct rk_vendor_req *p_req = &req; jboolean iscopy; const char *sn_utf = env->GetStringUTFChars(sn, &iscopy); LOGD("write serial no = %s", sn_utf); fd = open("/dev/vendor_storage", O_RDWR, 0); LOGD("open() fd = %d", fd); if (fd == -1) { LOGE("Cannot open port"); ret = -1; } p_req->tag = VENDOR_REQ_TAG; p_req->id = VENDOR_SN_ID; p_req->len = RKNAND_SYS_STORGAE_DATA_LEN; len = strlen(sn_utf); LOGD("p_req->len = %d", len); if(len > SERIALNO_BUF_LEN){ len = SERIALNO_BUF_LEN; } memset(p_req->data, 0, RKNAND_SYS_STORGAE_DATA_LEN); memcpy(p_req->data, sn_utf, len); ret = ioctl(fd, VENDOR_WRITE_IO, p_req); close(fd); env->ReleaseStringUTFChars(sn, sn_utf); LOGD("vendor write sn = %s, ret = %d\n", p_req->data, ret); return ret; }
2.读写MAC 相对复杂，不能直接传入字符串，读的时候需要从十六进制转成十进制 写的时候需要从十进制转成十六进制 （对于使用者比较友好）
mac地址格式为 50:af:73:44:ff:12(十六进制) 但是在vendor_storage 里是以十进制的格式存储的，占用六个字节， 比如50对应vendor_storage 里data[0] = 5*16+0 = 80 需要进行转换
//十进制转十六进制 void hexToAscii(uint8_t *hexData, size_t dataSize, char *asciiBuffer) { for (size_t i = 0; i < dataSize; ++i) { sprintf(&asciiBuffer[i * 2], "%02X", hexData[i]); } } //十六进制转十进制 int getNum(char arr[]){ int m=0; int sz=2; LOGD("sz = %d", sz); int i=0; for(i=0;i<sz;i++) { if(arr[i]>='0'&&arr[i]<='9'){ m=m*16+arr[i]-'0'; } else { m=m*16+arr[i]-'A'+10; } } LOGD("m = %d", m); return m; }
extern "C" JNIEXPORT jstring JNICALL Java_com_serialno_ReadWriteSerialNo_read(JNIEnv *env, jclass type,jint id){ int fd; int ret = 0; int len = 0; char r_buf[RKNAND_SYS_STORGAE_DATA_LEN]={0}; uint8 error[]="error"; struct rk_vendor_req req; struct rk_vendor_req *p_req = &req; p_req->tag = VENDOR_REQ_TAG; if(id == 1) p_req->id = VENDOR_SN_ID; else if(id == 3) p_req->id = VENDOR_LAN_MAC_ID; p_req->len = RKNAND_SYS_STORGAE_DATA_LEN; fd = open("/dev/vendor_storage", O_RDWR, 0); LOGD("open() fd = %d", fd); if (fd == -1) { LOGE("Cannot open port"); ret = -1; }else{ ret = ioctl(fd, VENDOR_READ_IO, p_req); close(fd); } if (!ret) { if(id == 1) len = strlen((char*)p_req->data); else if(id == 3) len = strlen((char*)p_req->data)*2; if(len <= 0){ len = strlen((char*)error); memcpy(r_buf, error, len); }else{ //sprintf(r_buf, "%d", p_req->data[0]); if(id == 1) memcpy(r_buf, p_req->data,len); else if(id == 3) hexToAscii(p_req->data,len,r_buf); //memcpy(r_buf, p_req->data,len); //sprintf(r_buf, "%s", r_buf); //LOGD("vendor read sn1 = %c len = %c, \n",(char)p_req->data[0], (char)p_req->data[1]); //LOGD("vendor read sn1 = %s len = %d, \n",r_buf, len); } }else{ len = strlen((char*)error); memcpy(r_buf, error, len); } //convert(r_buf); LOGD("vendor read sn2 = %s len = %d, \n", r_buf, len); jclass strClass = (env)->FindClass("java/lang/String"); jmethodID ctorID = (env)->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V"); jbyteArray bytes = (env)->NewByteArray(len); (env)->SetByteArrayRegion(bytes, 0, len, (jbyte*) r_buf); jstring encoding = (env)->NewStringUTF("utf-8"); return (jstring) (env)->NewObject(strClass, ctorID, bytes,encoding); } extern "C" JNIEXPORT jint JNICALL Java_com_serialno_ReadWriteSerialNo_write(JNIEnv *env, jclass type,jint id,jstring sn){ int fd; int ret = 0; int len = 0; struct rk_vendor_req req; struct rk_vendor_req *p_req = &req; jboolean iscopy; const char *sn_utf = env->GetStringUTFChars(sn, &iscopy); LOGD("write serial no = %s", sn_utf); fd = open("/dev/vendor_storage", O_RDWR, 0); LOGD("open() fd = %d", fd); if (fd == -1) { LOGE("Cannot open port"); ret = -1; } p_req->tag = VENDOR_REQ_TAG; //p_req->id = VENDOR_SN_ID; if(id == 1) p_req->id = VENDOR_SN_ID; else if(id == 3) p_req->id = VENDOR_LAN_MAC_ID; p_req->len = RKNAND_SYS_STORGAE_DATA_LEN; len = strlen(sn_utf); LOGD("p_req->len = %d", len); if(len > SERIALNO_BUF_LEN){ len = SERIALNO_BUF_LEN; } if(id == 3){ int k=0; for(int i=0;i<len-1;i+=2){ char num[2] = {sn_utf[i],sn_utf[i+1]}; p_req->data[k++] = getNum(num); } }else if(id == 1){ memset(p_req->data, 0, RKNAND_SYS_STORGAE_DATA_LEN); memcpy(p_req->data, sn_utf, len); } ret = ioctl(fd, VENDOR_WRITE_IO, p_req); close(fd); env->ReleaseStringUTFChars(sn, sn_utf); LOGD("vendor write sn = %s, ret = %d\n", p_req->data, ret); return ret; }