jim hamblen / Mbed 2 deprecated HelloWorld_VL53L0X_LPC1768

Test an Adafruit single VL53L0X breakout board using the mbed LPC1768 and print distance measurement to PC

Dependencies:   X_NUCLEO_53L0A1 mbed

Fork of HelloWorld_53L0A1 by ST

https://os.mbed.com/users/kbeck8/notebook/alternative-control-for-remote-control-vehicle/ has a more complex example using three LIDAR breakouts for gesture detection on the same I2C bus using the shutdown pin (solves the issue of them having the same I2C address). The driver has support for three, but an AND gate is required unless the driver is changed. DigitalOut pins turn shutdown on/off on each LIDAR.

main.cpp@1:3483e701ec59, 2016-11-28 (annotated)

Committer:
johnAlexander
Date:
Mon Nov 28 14:55:05 2016 +0000
Revision:
1:3483e701ec59
Parent:
0:ce8359133ae6
Child:
3:b3f70617a6b3
First release. Ready to go to st.com and mbed.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
johnAlexander 0:ce8359133ae6 1 #include "mbed.h"
johnAlexander 0:ce8359133ae6 2 #include "x_nucleo_53l0a1.h"
johnAlexander 0:ce8359133ae6 3 #include <string.h>
johnAlexander 0:ce8359133ae6 4 #include <stdlib.h>
johnAlexander 0:ce8359133ae6 5 #include <stdio.h>
johnAlexander 0:ce8359133ae6 6 #include <assert.h>
johnAlexander 0:ce8359133ae6 7
johnAlexander 1:3483e701ec59 8 /* This VL53L0X Expansion board test application performs a range measurement in polling mode
johnAlexander 0:ce8359133ae6 9 on the onboard embedded top sensor.
johnAlexander 1:3483e701ec59 10 The measured data is displayed on the on-board 4-digit display.
johnAlexander 0:ce8359133ae6 11
johnAlexander 1:3483e701ec59 12 User Blue button stops the current measurement and the entire program, releasing all resources.
johnAlexander 0:ce8359133ae6 13 Reset button is used to restart the program. */
johnAlexander 0:ce8359133ae6 14
johnAlexander 0:ce8359133ae6 15 /* Polling operating modes don`t require callback function that handles IRQ
johnAlexander 0:ce8359133ae6 16 Callback IRQ functions are used only for measure that require interrupt */
johnAlexander 0:ce8359133ae6 17
johnAlexander 0:ce8359133ae6 18 /* GetMeasurement is asynchronous! It returns NOT_READY if the measurement value
johnAlexander 0:ce8359133ae6 19 is not ready to be read from the corresponding register. So you need to wait
johnAlexander 0:ce8359133ae6 20 for the result to be ready */
johnAlexander 0:ce8359133ae6 21
johnAlexander 0:ce8359133ae6 22 #define VL53L0_I2C_SDA D14
johnAlexander 0:ce8359133ae6 23 #define VL53L0_I2C_SCL D15
johnAlexander 0:ce8359133ae6 24
johnAlexander 0:ce8359133ae6 25 #define RANGE 0
johnAlexander 0:ce8359133ae6 26
johnAlexander 0:ce8359133ae6 27 static X_NUCLEO_53L0A1 *board=NULL;
johnAlexander 0:ce8359133ae6 28 VL53L0X_RangingMeasurementData_t data_sensor_centre;
johnAlexander 1:3483e701ec59 29 OperatingMode operating_mode;
johnAlexander 0:ce8359133ae6 30
johnAlexander 0:ce8359133ae6 31 /* flags that handle interrupt request */
johnAlexander 0:ce8359133ae6 32 bool int_sensor_centre=false, int_stop_measure=false;
johnAlexander 0:ce8359133ae6 33
johnAlexander 0:ce8359133ae6 34 /* ISR callback function of the sensor_centre */
johnAlexander 0:ce8359133ae6 35 void SensorTopIRQ(void)
johnAlexander 0:ce8359133ae6 36 {
johnAlexander 0:ce8359133ae6 37 int_sensor_centre=true;
johnAlexander 0:ce8359133ae6 38 board->sensor_centre->DisableInterruptMeasureDetectionIRQ();
johnAlexander 0:ce8359133ae6 39 }
johnAlexander 0:ce8359133ae6 40
johnAlexander 0:ce8359133ae6 41 /* ISR callback function of the user blue button to stop program */
johnAlexander 0:ce8359133ae6 42 void StopMeasureIRQ(void)
johnAlexander 0:ce8359133ae6 43 {
johnAlexander 0:ce8359133ae6 44 int_stop_measure=true;
johnAlexander 0:ce8359133ae6 45 }
johnAlexander 1:3483e701ec59 46
johnAlexander 0:ce8359133ae6 47 /* On board 4 digit local display refresh */
johnAlexander 0:ce8359133ae6 48 void DisplayRefresh(OperatingMode op_mode)
johnAlexander 0:ce8359133ae6 49 {
johnAlexander 0:ce8359133ae6 50 char str[5];
johnAlexander 0:ce8359133ae6 51
johnAlexander 0:ce8359133ae6 52 if (op_mode==range_single_shot_polling || op_mode==range_continuous_interrupt || op_mode==range_continuous_polling)
johnAlexander 0:ce8359133ae6 53 {
johnAlexander 0:ce8359133ae6 54 if (data_sensor_centre.RangeStatus == 0) // we have a valid range.
johnAlexander 0:ce8359133ae6 55 {
johnAlexander 0:ce8359133ae6 56 sprintf(str,"%d",data_sensor_centre.RangeMilliMeter);
johnAlexander 0:ce8359133ae6 57 }
johnAlexander 0:ce8359133ae6 58 else
johnAlexander 0:ce8359133ae6 59 {
johnAlexander 0:ce8359133ae6 60 sprintf(str,"%s","----");
johnAlexander 0:ce8359133ae6 61 }
johnAlexander 0:ce8359133ae6 62 }
johnAlexander 0:ce8359133ae6 63
johnAlexander 0:ce8359133ae6 64 board->display->DisplayString(str);
johnAlexander 0:ce8359133ae6 65 }
johnAlexander 0:ce8359133ae6 66
johnAlexander 1:3483e701ec59 67 void RangeMeasure(DevI2C *device_i2c) {
johnAlexander 0:ce8359133ae6 68 int status;
johnAlexander 0:ce8359133ae6 69
johnAlexander 0:ce8359133ae6 70 /* creates the 53L0A1 expansion board singleton obj */
johnAlexander 0:ce8359133ae6 71 board=X_NUCLEO_53L0A1::Instance(device_i2c, A2, D8, D2);
johnAlexander 0:ce8359133ae6 72
johnAlexander 0:ce8359133ae6 73 board->display->DisplayString("53L0");
johnAlexander 0:ce8359133ae6 74 /* init the 53L0A1 expansion board with default values */
johnAlexander 0:ce8359133ae6 75 status=board->InitBoard();
johnAlexander 0:ce8359133ae6 76 if(status)
johnAlexander 0:ce8359133ae6 77 printf("Failed to init board!\n\r");
johnAlexander 0:ce8359133ae6 78 // operating_mode=range_continuous_polling;
johnAlexander 0:ce8359133ae6 79 operating_mode=range_single_shot_polling;
johnAlexander 0:ce8359133ae6 80 /* start the measure on sensor top */
johnAlexander 0:ce8359133ae6 81 status=board->sensor_centre->StartMeasurement(operating_mode, SensorTopIRQ);
johnAlexander 0:ce8359133ae6 82 if(!status)
johnAlexander 0:ce8359133ae6 83 {
johnAlexander 0:ce8359133ae6 84 while(1)
johnAlexander 0:ce8359133ae6 85 {
johnAlexander 0:ce8359133ae6 86 status=board->sensor_centre->GetMeasurement(operating_mode, &data_sensor_centre);
johnAlexander 0:ce8359133ae6 87 DisplayRefresh(operating_mode);
johnAlexander 0:ce8359133ae6 88 if(int_stop_measure) // Blue Button isr was triggered
johnAlexander 0:ce8359133ae6 89 {
johnAlexander 0:ce8359133ae6 90 status=board->sensor_centre->StopMeasurement(operating_mode); // stop the measure and exit
johnAlexander 0:ce8359133ae6 91 int_stop_measure = false;
johnAlexander 0:ce8359133ae6 92 printf("\nProgram stopped!\n\n\r");
johnAlexander 0:ce8359133ae6 93 break;
johnAlexander 0:ce8359133ae6 94 }
johnAlexander 0:ce8359133ae6 95 }
johnAlexander 0:ce8359133ae6 96 }
johnAlexander 0:ce8359133ae6 97 board->display->DisplayString("BYE");
johnAlexander 0:ce8359133ae6 98 delete board;
johnAlexander 0:ce8359133ae6 99 }
johnAlexander 0:ce8359133ae6 100
johnAlexander 0:ce8359133ae6 101 /*=================================== Main ==================================
johnAlexander 0:ce8359133ae6 102 Press the blue user button to stop the measurements in progress
johnAlexander 0:ce8359133ae6 103 =============================================================================*/
johnAlexander 0:ce8359133ae6 104 int main()
johnAlexander 0:ce8359133ae6 105 {
johnAlexander 0:ce8359133ae6 106 #if USER_BUTTON==PC_13 // we are cross compiling for Nucleo-f401
johnAlexander 0:ce8359133ae6 107 InterruptIn stop_button (USER_BUTTON);
johnAlexander 0:ce8359133ae6 108 stop_button.rise (&StopMeasureIRQ);
johnAlexander 0:ce8359133ae6 109 #endif
johnAlexander 0:ce8359133ae6 110 DevI2C *device_i2c =new DevI2C(VL53L0_I2C_SDA, VL53L0_I2C_SCL);
johnAlexander 0:ce8359133ae6 111
johnAlexander 1:3483e701ec59 112 RangeMeasure(device_i2c); // start continuous measures
johnAlexander 0:ce8359133ae6 113 }
johnAlexander 0:ce8359133ae6 114
johnAlexander 0:ce8359133ae6 115
johnAlexander 0:ce8359133ae6 116