8ea16655a6
error: Path relative to repository other than nuttx must begin with the root directory Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/****************************************************************************
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* apps/canutils/libobd2/obd_decodepid.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <nuttx/can/can.h>
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#include "canutils/obd.h"
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#include "canutils/obd_pid.h"
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#include "canutils/obd_frame.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MAXDATA 16
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char g_data[MAXDATA];
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: obd_decode_pid
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*
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* Description:
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* Decode the value returned for a determined PID.
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*
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* It will return the data decode as text string or NULL if error.
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*
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****************************************************************************/
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FAR char *obd_decode_pid(FAR struct obd_dev_s *dev, uint8_t pid)
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{
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uint32_t pids;
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int rpm;
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/* Verify if received data is valid */
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if (dev->data[2] != pid)
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{
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printf("Expecting PID %02x but received %02x!\n", pid, dev->data[2]);
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return NULL;
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}
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switch (dev->data[2])
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{
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case OBD_PID_SUPPORTED:
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pids = (dev->data[3] << 24) | (dev->data[4] << 16) | \
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(dev->data[5] << 8) | dev->data[6];
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snprintf(g_data, MAXDATA, "%08X", pids);
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#ifdef CONFIG_DEBUG_INFO
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printf("Supported PIDs: %08X\n");
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#endif
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break;
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case OBD_PID_ENGINE_TEMPERATURE:
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snprintf(g_data, MAXDATA, "%d", dev->data[3] - 40);
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#ifdef CONFIG_DEBUG_INFO
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printf("Engine Temperature = %d\n", dev->data[3] - 40);
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#endif
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break;
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case OBD_PID_RPM:
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rpm = ((256 * dev->data[3]) + dev->data[4])/4;
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snprintf(g_data, MAXDATA, "%d", rpm);
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#ifdef CONFIG_DEBUG_INFO
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printf("RPM = %d\n", rpm);
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#endif
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break;
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case OBD_PID_SPEED:
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snprintf(g_data, MAXDATA, "%d", dev->data[3]);
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#ifdef CONFIG_DEBUG_INFO
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printf("SPEED = %d Km/h\n", dev->data[3]);
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#endif
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break;
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case OBD_PID_THROTTLE_POSITION:
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snprintf(g_data, MAXDATA, "%d", (100 * dev->data[3])/255);
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#ifdef CONFIG_DEBUG_INFO
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printf("Throttle position = %d\% \n", (100 * dev->data[3])/255);
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#endif
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break;
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}
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return g_data;
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}
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