"The project is thrust by the alarm, prompting the distance between the driver and his car behind the car.
The alarm, H08R6 module (infrared sensor) is constituted by H07R3 module (audio speakers), H08R6 module (infrared sensor), the read distance between him and the car, and then sends the message to H07R3 module (audio speakers) play a song, the volume levels will decrease as the distance between the two vehicles increases.
Be
Design steps:
First, the IR sensor module connected together (H08R6) and an audio speaker module (H07R3).
Second, write code:
1, the two modules (H08R6, H07R3) are defined in the fixed topology, we describe the connection between the module thereof. (Note: P08R6 H08R6 module with the same module, but different forms)
2, defines a specific ID for each module. This ID is to function in another module definition module. like:
Three modules (module1, module2, Module3), Module 1 Module 2 will send a message, it will know where the message module2 by ID, which transmits the message over to module1.
ID module 1 (H08R6) 1
ID module 2 (H07R3) 2
In this section, module2 (H07R3) will receive a message on port 3, thus being inverted.
3, in the main.c file:
The sensor unit is set to units of cm, and the DMA is enabled, in order to transfer data from the sensor memory
Inside a for loop:
AbsDistanceToColor calling function the function (Sensor) function returns a value dependent on sensor values, and variable assignment returns the value assigned state_sensor
Adding a delay time, which is the time between a message with another message
In the switch () inside, we will check the value of state_sensor
Additional information:
messageParams [0 -> 3] = frequency; // frequency
messageParams [4] = number of samples for sine wave; // number of samples of a sine wave
messageParams [5] = play sine wave for specified time; // specified playback time sine
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
2 is the ID module 2 (H07R3)
CODE_H07R3_PLAY_SINE is the code message (through it, module2 (H07R3) will know what to execution), said here sine wave module2 (H07R3)
6 messageparams
Note: they are not (audio speaker module H07R3) code, external code as performed by an infrared sensor module (H08R6).
An infrared sensor attached :( H08R6 code)
/ **
************************************************** ************************************************************ ****
* File name: main.c
* Note: The main program body
************************************************** ************************************************************ ****
*
* Copyright (c) 2015 STMicroelectronics
*
* In source and binary forms Redistribution and use, regardless of whether modifications,
* The following conditions is allowed:
* 1. Redistributions of source code must retain the above copyright notice,
* This list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* This list of conditions and the following disclaimer in the documentation
* And / or other materials accompanying the release.
* 3. STMicroelectronics the names of its contributors name
* Can be used to endorse or promote products derived from this software
* Especially without the prior written permission.
*
* This software is provided "as is" provided by the copyright holders and contributors
* And all warranties, express or implied, including, but not limited to,
* Merchantability and fitness for a particular purpose implied warranties
* Disclaimer. Copyright holders or contributors shall be liable under any circumstances
* For any direct, indirect, incidental, special, or consequential exemplary results
* Damages (including, but not limited to, procurement of substitute goods or
* Service; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* Whether it is based on contractual liability, strict liability, or based on any theory of liability,
* Or tort (including negligence or otherwise) terminate your use in any way
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE, you can use this software *.
*
************************************************** ************************************************************ ****
* /
/ * Hexabitz amended as BitzOS (BOS) V0.2.4- Copyright (C) 2017-2021 Hexabitz
all rights reserved* /
/ *include----------------------------------------------- ------------------- * /
#include "BOS.h"
/ * Private variables ---------------------------------------------- ----------- * /
float sensor = 0.0f;
uint8_t state_sensor;
uint8_t old_state_sensor;
uint8_t mode = 1;
uint8_t sample = 200;
/ * Private function prototypes --------------------------------------------- - * /
uint8_t AbsDistanceToColor (float distance);
uint8_t counter = 0;
/* The main function---------------------------------------------- -------------- * /
int main (void)
{
/ * MCU configuration ---------------------------------------------- ------------ * /
/ * Reset all peripheral devices, initialization of the Flash interface and Systick. * /
HAL_Init ();
/ * The system clock * /
SystemClock_Config ();
/ * Initialize peripherals all users * /
/ * Initialize BitzOS * /
BOS_Init ();
/ * Call the init function freertos objects (in freertos.c in) * /
MX_FREERTOS_Init ();
/ * Start the scheduler * /
osKernelStart ();
/* Infinite loop */
while (1)
{
}
}
/ * ------------------------------------------------ ----------- * /
/ * User tasks * /
void UserTask (void * argument)
{
// Set the units to mm
SetRangeUnit (UNIT_MEASUREMENT_CM);
// flow memory
Stream_ToF_Memory (50, portMAX_DELAY, & sensor);
for (;;)
{
state_sensor = AbsDistanceToColor (sensor);
Delay_ms (250);
switch (state_sensor)
{
case 1:
// Frequency
messageParams [0] = (uint8_t) (150 >> 24);
messageParams [1] = (uint8_t) (150 >> 16);
messageParams [2] = (uint8_t) (150 >> 8);
messageParams [3] = (uint8_t) (150);
// number of samples Music Notes
messageParams [4] = sample;
// duration seconds 2 seconds
// Note: Division 16 seconds
// Time = duration / 16 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
case 2:
// Frequency
messageParams [0] = (uint8_t) (300 >> 24);
messageParams [1] = (uint8_t) (300 >> 16);
messageParams [2] = (uint8_t) (300 >> 8);
messageParams [3] = (uint8_t) (300);
// number of samples Music Notes
messageParams [4] = sample;
// duration seconds 2 seconds
// Note: Division 16 seconds
// Time = duration / 16 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
case 3:
// Frequency
messageParams [0] = (uint8_t) (500 >> 24);
messageParams [1] = (uint8_t) (500 >> 16);
messageParams [2] = (uint8_t) (500 >> 8);
messageParams [3] = (uint8_t) (500);
// number of samples Music Notes
messageParams [4] = sample;
// duration seconds 2 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE,6);
break;
case 4:
// Frequency
messageParams [0] = (uint8_t) (700 >> 24);
messageParams [1] = (uint8_t) (700 >> 16);
messageParams [2] = (uint8_t) (700 >> 8);
messageParams [3] = (uint8_t) (700);
Music Notes // sample
messageParams [4] = sample;
// duration seconds 2 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
case 5:
// Frequency
messageParams [0] = (uint8_t) (1000 >> 24);
messageParams [1] = (uint8_t) (1000 >> 16);
messageParams [2] = (uint8_t) (1000 >> 8);
messageParams [3] = (uint8_t) (1000);
Music Notes // sample
messageParams [4] = sample;
// duration seconds 2 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
case 6:
// freq
messageParams [0] = (uint8_t) (1500 >> 24);
messageParams [1] = (uint8_t) (1500 >> 16);
messageParams [2] = (uint8_t) (1500 >> 8);
messageParams [3] = (uint8_t) (1500);
Music Notes // sample
messageParams [4] = sample;
// duration seconds 2 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
case 7:
// Frequency
messageParams [0] = (uint8_t) (3000 >> 24);
messageParams [1] = (uint8_t) (3000 >> 16);
messageParams [2] = (uint8_t) (3000 >> 8);
messageParams [3] = (uint8_t) (3000);
Music Notes // sample
messageParams [4] = sample;
// duration seconds 2 seconds
messageParams [5] = 2;
SendMessageToModule (2, CODE_H07R3_PLAY_SINE, 6);
break;
defult:
break;
}
}
}
uint8_t AbsDistanceToColor (float distance)
{
if (distance <15.0f)
return 1;
else if (distance <20.0f)
return 2;
else if (distance <25.0f)
return 3;
else if (distance <30.0f)
return 4;
else if (distance <35.0f)
return 5;
else if (distance <40.0f)
return 6;
else if (distance <45.0f)
return 7;
else
return 8;
} "
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