Raspberry_Pi_Pico_VL53L8CX/main.c

/*******************************************************************************
* Copyright (c) 2020, STMicroelectronics - All Rights Reserved
*
* This file is part of the VL53L8CX Ultra Lite Driver and is dual licensed,
* either 'STMicroelectronics Proprietary license'
* or 'BSD 3-clause "New" or "Revised" License' , at your option.
*
********************************************************************************
*
* 'STMicroelectronics Proprietary license'
*
********************************************************************************
*
* License terms: STMicroelectronics Proprietary in accordance with licensing
* terms at www.st.com/sla0081
*
* STMicroelectronics confidential
* Reproduction and Communication of this document is strictly prohibited unless
* specifically authorized in writing by STMicroelectronics.
*
*
********************************************************************************
*
* Alternatively, the VL53L8CX Ultra Lite Driver may be distributed under the
* terms of 'BSD 3-clause "New" or "Revised" License', in which case the
* following provisions apply instead of the ones mentioned above :
*
********************************************************************************
*
* License terms: BSD 3-clause "New" or "Revised" License.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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/***********************************/
/*   VL53L8CX ULD basic example    */
/***********************************/
/*
* This example is the most basic. It initializes the VL53L8CX ULD, and starts
* a ranging to capture 10 frames.
*
* By default, ULD is configured to have the following settings :
* - Resolution 4x4
* - Ranging period 1Hz
*
* In this example, we also suppose that the number of target per zone is
* set to 1 , and all output are enabled (see file platform.h).
*/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "vl53l8cx_api.h"
#include "pico/stdlib.h"
#include "hardware/i2c.h"

void main(void)
{
    stdio_init_all();
	gpio_set_function(0, GPIO_FUNC_I2C);
    gpio_set_function(1, GPIO_FUNC_I2C);
    i2c_init(i2c0, 400 * 1000);
    printf("3\n");
    WaitMs(0, 1000);
    printf("2\n");
    WaitMs(0, 1000);
    printf("1\n");
    WaitMs(0, 1000);
    printf("0\n");
    WaitMs(0, 1000);


	/*********************************/
	/*   VL53L8CX ranging variables  */
	/*********************************/

	uint8_t 				status, loop, isAlive, isReady, i;
	VL53L8CX_Configuration 	Dev;			/* Sensor configuration */
	VL53L8CX_ResultsData 	Results;		/* Results data from VL53L8CX */


	/*********************************/
	/*      Customer platform        */
	/*********************************/

	/* Fill the platform structure with customer's implementation. For this
	* example, only the I2C address is used.
	*/
	Dev.platform.address = VL53L8CX_DEFAULT_I2C_ADDRESS;

	/* (Optional) Reset sensor toggling PINs (see platform, not in API) */
	//Reset_Sensor(&(Dev.platform));

	/* (Optional) Set a new I2C address if the wanted address is different
	* from the default one (filled with 0x20 for this example).
	*/
	//status = vl53l8cx_set_i2c_address(&Dev, 0x20);


	/*********************************/
	/*   Power on sensor and init    */
	/*********************************/

	/* (Optional) Check if there is a VL53L8CX sensor connected */
	status = vl53l8cx_is_alive(&Dev, &isAlive);
	if(!isAlive || status)
	{
		printf("VL53L8CX not detected at requested address\n");
		while(1);
	}else{printf("VL53L8CX detected !\n");

    }

	/* (Mandatory) Init VL53L8CX sensor */
	status = vl53l8cx_init(&Dev);
	if(status)
	{
		while(1){
			printf("VL53L8CX ULD Loading failed :%d\n", status);
			WaitMs(&(Dev.platform), 1000);
		}
		
		return;
	}

	printf("VL53L8CX ULD ready ! (Version : %s)\n",
			VL53L8CX_API_REVISION);
	
	status = vl53l8cx_set_resolution(&Dev, VL53L8CX_RESOLUTION_8X8);
	if(status !=0){
		while(1){
			printf("vl53l8cx_set_resolution failed :%d\n", status);
			WaitMs(&(Dev.platform), 1000);
		}
	}

	status = vl53l8cx_set_ranging_frequency_hz(&Dev, 15);
	if(status !=0){
		while(1){
			printf("vl53l8cx_set_ranging_frequency_hz  (15hz) failed :%d\n", status);
			WaitMs(&(Dev.platform), 1000);
		}
	}

	//vl53l8cx_set_target_order(&Dev, VL53L8CX_TARGET_ORDER_CLOSEST);
	vl53l8cx_set_target_order(&Dev, VL53L8CX_TARGET_ORDER_STRONGEST);


	/*********************************/
	/*         Ranging loop          */
	/*********************************/

	status = vl53l8cx_start_ranging(&Dev);

	loop = 0;
	uint32_t time0, time1, time2, time3;
	while(1)
	{
		/* Use polling function to know when a new measurement is ready.
		 * Another way can be to wait for HW interrupt raised on PIN A1
		 * (INT) when a new measurement is ready */
		time0 = time_us_32();
 
		status = vl53l8cx_check_data_ready(&Dev, &isReady);
		time1 = time_us_32();

		if(isReady)
		{
			vl53l8cx_get_ranging_data(&Dev, &Results);
			time2 = time_us_32();

			/* As the sensor is set in 4x4 mode by default, we have a total 
			 * of 16 zones to print. For this example, only the data of first zone are 
			 * print */
			printf("Print data no : %3u\n", Dev.streamcount);
			printf(">distance:");
			for(int row=0; row < 8; row++){
				for(int col=0; col < 8; col++){
					if(Results.target_status[col+ 8*row] == 255 ||// No Target detected
						Results.target_status[col+ 8*row] == 10 ||// Range valid, but no target detected at previous range
						Results.target_status[col+ 8*row] == 4 ||// Target consistency failed
						Results.target_status[col+ 8*row] == 3  ){// Sigma error too high
						Results.distance_mm[col+ 8*row] = 3000;
					}
					printf("%04d,", Results.distance_mm[col+ 8*row]);
					if((row == 0 ||row == 1 ) && Results.distance_mm[col+ 8*row] < 650){
					//	printf("\nStatus: %d\n",Results.target_status[col+ 8*row]);
					}
				}
			}
			printf("\n");
			time3 = time_us_32();
			loop++;

			printf("temps : %d, %d, %d\n", time1-time0, time2-time0, time3-time0);
		}

		/* Wait a few ms to avoid too high polling (function in platform
		 * file, not in API) */
		//WaitMs(&(Dev.platform), 5);
	}

	status = vl53l8cx_stop_ranging(&Dev);
	printf("End of ULD demo\n");
	return;
}