Timo Karppinen / Mbed OS Pmod_OLEDrgb_ALS1_K64F

A concept design laboratory prototype for measuring ambient light value. The high levels typically mean that there is high rates of UVA nad UVB radiation as well. A warning of this is displayed on a small screen. NXP FRDM-K64F, Digilent Pmod modules Pmod OLEDrgb and Pmod ALS.

Dependencies:   Adafruit_SSD1331_Mbed Adafruit-GFX

main.cpp@0:87339e72a5eb, 2020-04-19 (annotated)

Committer:
timo_k2
Date:
Sun Apr 19 16:06:25 2020 +0000
Revision:
0:87339e72a5eb
Child:
1:2f167213fd2d
Pmod_OLED_ALS is made for testing that the SPI communication works with NXP FRDM_K64F, Digilent Pmod modules Pmod OLEDrgb and Pmod ALS. It works.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
timo_k2 0:87339e72a5eb 1 /* mbed Microcontroller Library
timo_k2 0:87339e72a5eb 2 * Copyright (c) 2019 ARM Limited
timo_k2 0:87339e72a5eb 3 * SPDX-License-Identifier: Apache-2.0
timo_k2 0:87339e72a5eb 4 */
timo_k2 0:87339e72a5eb 5
timo_k2 0:87339e72a5eb 6 #include "mbed.h"
timo_k2 0:87339e72a5eb 7 #include "Adafruit_SSD1331.h"
timo_k2 0:87339e72a5eb 8 #include "Adafruit_GFX.h"
timo_k2 0:87339e72a5eb 9
timo_k2 0:87339e72a5eb 10
timo_k2 0:87339e72a5eb 11 // PmodOLEDrgb
timo_k2 0:87339e72a5eb 12 Adafruit_SSD1331 OLED(D8, D7, D10, D11, NC, D13); // cs, res, dc, mosi, (nc), sck
timo_k2 0:87339e72a5eb 13
timo_k2 0:87339e72a5eb 14 DigitalOut LED(LED2);
timo_k2 0:87339e72a5eb 15 DigitalOut VCCEN(D6);
timo_k2 0:87339e72a5eb 16 DigitalOut PMODEN(D5);
timo_k2 0:87339e72a5eb 17
timo_k2 0:87339e72a5eb 18 // Definition of colors on the OLED display
timo_k2 0:87339e72a5eb 19 #define Black 0x0000
timo_k2 0:87339e72a5eb 20 #define Blue 0x001F
timo_k2 0:87339e72a5eb 21 #define Red 0xF800
timo_k2 0:87339e72a5eb 22 #define Green 0x07E0
timo_k2 0:87339e72a5eb 23 #define Cyan 0x07FF
timo_k2 0:87339e72a5eb 24 #define Magenta 0xF81F
timo_k2 0:87339e72a5eb 25 #define Yellow 0xFFE0
timo_k2 0:87339e72a5eb 26 #define White 0xFFFF
timo_k2 0:87339e72a5eb 27
timo_k2 0:87339e72a5eb 28 // PmodALS
timo_k2 0:87339e72a5eb 29 SPI spi(D11, D12, D13); // mosi, miso, sck
timo_k2 0:87339e72a5eb 30
timo_k2 0:87339e72a5eb 31
timo_k2 0:87339e72a5eb 32 DigitalOut alsCS(D4); // chip select for sensor SPI communication
timo_k2 0:87339e72a5eb 33 char alsByte0 = 0; // 8 bit data from sensor board, char is the unsigned 8 bit
timo_k2 0:87339e72a5eb 34 char alsByte1 = 0; // 8 bit data from sensor board
timo_k2 0:87339e72a5eb 35 char alsByteSh0 = 0;
timo_k2 0:87339e72a5eb 36 char alsByteSh1 = 0;
timo_k2 0:87339e72a5eb 37 char als8bit = 0;
timo_k2 0:87339e72a5eb 38 unsigned short alsRaw = 0; // unsigned 16 bit
timo_k2 0:87339e72a5eb 39 float alsScaledF = 0; // 32 bit floating point
timo_k2 0:87339e72a5eb 40 void getALS();
timo_k2 0:87339e72a5eb 41
timo_k2 0:87339e72a5eb 42
timo_k2 0:87339e72a5eb 43 char Time[50],Date[50];
timo_k2 0:87339e72a5eb 44 void getTime();
timo_k2 0:87339e72a5eb 45 int first(0);
timo_k2 0:87339e72a5eb 46
timo_k2 0:87339e72a5eb 47 int main()
timo_k2 0:87339e72a5eb 48 {
timo_k2 0:87339e72a5eb 49 // Showing with a LED that program has started
timo_k2 0:87339e72a5eb 50 LED = 0;
timo_k2 0:87339e72a5eb 51 VCCEN = 1; // if you did not connect VCCEN permanently to Vcc
timo_k2 0:87339e72a5eb 52 PMODEN = 1; // if you did not connect PMODEN permanently to Vcc
timo_k2 0:87339e72a5eb 53 wait_ms(2000);
timo_k2 0:87339e72a5eb 54 LED = 1;
timo_k2 0:87339e72a5eb 55 wait_ms(2000);
timo_k2 0:87339e72a5eb 56 LED = 0;
timo_k2 0:87339e72a5eb 57 // Initalize the PmodOLEDrgb
timo_k2 0:87339e72a5eb 58 OLED.begin(); // initialization of display objcet
timo_k2 0:87339e72a5eb 59
timo_k2 0:87339e72a5eb 60 // SPI for the ALS
timo_k2 0:87339e72a5eb 61 alsCS = 1;
timo_k2 0:87339e72a5eb 62 // Setup the spi for 8 bit data, high steady state clock,
timo_k2 0:87339e72a5eb 63 // second edge capture, with a 12MHz clock rate
timo_k2 0:87339e72a5eb 64 spi.format(8,0);
timo_k2 0:87339e72a5eb 65 spi.frequency(12000000);
timo_k2 0:87339e72a5eb 66
timo_k2 0:87339e72a5eb 67 while (true) {
timo_k2 0:87339e72a5eb 68 while(first < 3)
timo_k2 0:87339e72a5eb 69 {
timo_k2 0:87339e72a5eb 70 first += 1;
timo_k2 0:87339e72a5eb 71 OLED.fillScreen(Black); // background screen in black
timo_k2 0:87339e72a5eb 72 OLED.setTextColor(Cyan); // color of text in cyan
timo_k2 0:87339e72a5eb 73 OLED.setCursor(0,0); // cursor is in x=0 and y=15
timo_k2 0:87339e72a5eb 74 OLED.printf("Test module Pmod"); // display text
timo_k2 0:87339e72a5eb 75 wait_ms(500); // wait 500 ms
timo_k2 0:87339e72a5eb 76 OLED.setCursor(0,15); // cursor is in x=0 and y=15
timo_k2 0:87339e72a5eb 77 OLED.setTextSize(2); // size of text
timo_k2 0:87339e72a5eb 78 OLED.setTextColor(Red); // text in red color
timo_k2 0:87339e72a5eb 79 OLED.printf("DIGILENT"); // display text
timo_k2 0:87339e72a5eb 80 OLED.setCursor(20,40); // cursor is in x=20 and y=40
timo_k2 0:87339e72a5eb 81 OLED.setTextSize(1); // size of text
timo_k2 0:87339e72a5eb 82 OLED.setTextColor(Green); // text in green color
timo_k2 0:87339e72a5eb 83 OLED.printf("LEXTRONIC"); // display text
timo_k2 0:87339e72a5eb 84 OLED.drawFastHLine(1, 60, OLED.width()-1, Blue); // blue line x=1 to screen width-1 and y=60
timo_k2 0:87339e72a5eb 85 wait_ms(2000); // wait 2 s
timo_k2 0:87339e72a5eb 86 OLED.fillScreen(Black); // background display in black (erase display)
timo_k2 0:87339e72a5eb 87 OLED.fillRoundRect(5, 5, 30, 40, 1, Blue); // French flag bleu blanc rouge
timo_k2 0:87339e72a5eb 88 OLED.fillRoundRect(35, 5, 30, 40, 1, White);
timo_k2 0:87339e72a5eb 89 OLED.fillRoundRect(65, 5, 30, 40, 1, Red);
timo_k2 0:87339e72a5eb 90 OLED.fillCircle(90, 55, 5, Yellow); // yellow circle with radius=5 in x=90 and y=55
timo_k2 0:87339e72a5eb 91 wait_ms(2000); // wait 2 s
timo_k2 0:87339e72a5eb 92 }
timo_k2 0:87339e72a5eb 93
timo_k2 0:87339e72a5eb 94 getTime();
timo_k2 0:87339e72a5eb 95 OLED.fillScreen(Black); // background screen in black
timo_k2 0:87339e72a5eb 96 OLED.setTextColor(Cyan); // color of text in cyan
timo_k2 0:87339e72a5eb 97 wait_ms(300);
timo_k2 0:87339e72a5eb 98 OLED.setCursor(0,0); // cursor is in x=0 and y=0
timo_k2 0:87339e72a5eb 99 OLED.printf("Rec '%s' \r\n",Time);
timo_k2 0:87339e72a5eb 100
timo_k2 0:87339e72a5eb 101 getALS();
timo_k2 0:87339e72a5eb 102 OLED.printf("LUX = '%0.1f' \r\n",alsScaledF);
timo_k2 0:87339e72a5eb 103
timo_k2 0:87339e72a5eb 104 if (alsScaledF > 100)
timo_k2 0:87339e72a5eb 105 {
timo_k2 0:87339e72a5eb 106 OLED.setTextColor(Yellow);
timo_k2 0:87339e72a5eb 107 OLED.printf("Be aware of high UV radiation!");
timo_k2 0:87339e72a5eb 108 OLED.fillRoundRect(10, 35, 50, 3 , 1, Yellow);
timo_k2 0:87339e72a5eb 109 }
timo_k2 0:87339e72a5eb 110 OLED.setCursor(0,40); // cursor is in x=0 and y=0
timo_k2 0:87339e72a5eb 111 OLED.printf("Test completed");
timo_k2 0:87339e72a5eb 112 printf("printed on OLED");
timo_k2 0:87339e72a5eb 113
timo_k2 0:87339e72a5eb 114 wait(1);
timo_k2 0:87339e72a5eb 115 }
timo_k2 0:87339e72a5eb 116 }
timo_k2 0:87339e72a5eb 117
timo_k2 0:87339e72a5eb 118 void getTime()
timo_k2 0:87339e72a5eb 119 {
timo_k2 0:87339e72a5eb 120 time_t seconds = time(NULL);
timo_k2 0:87339e72a5eb 121 strftime(Time,40,"%H:%M:%S", localtime(&seconds));
timo_k2 0:87339e72a5eb 122 strftime(Date,40,"%d-%b-%Y", localtime(&seconds));
timo_k2 0:87339e72a5eb 123 printf("Recorded '%s' \r\n",Time);
timo_k2 0:87339e72a5eb 124 }
timo_k2 0:87339e72a5eb 125
timo_k2 0:87339e72a5eb 126 void getALS()
timo_k2 0:87339e72a5eb 127 {
timo_k2 0:87339e72a5eb 128 alsCS = 0;
timo_k2 0:87339e72a5eb 129
timo_k2 0:87339e72a5eb 130 alsByte0 = spi.write(0x00);
timo_k2 0:87339e72a5eb 131 alsByte1 = spi.write(0x00);
timo_k2 0:87339e72a5eb 132
timo_k2 0:87339e72a5eb 133 alsCS = 1;
timo_k2 0:87339e72a5eb 134
timo_k2 0:87339e72a5eb 135 alsByteSh0 = alsByte0 << 4;
timo_k2 0:87339e72a5eb 136 alsByteSh1 = alsByte1 >> 4;
timo_k2 0:87339e72a5eb 137
timo_k2 0:87339e72a5eb 138 als8bit =( alsByteSh0 | alsByteSh1 );
timo_k2 0:87339e72a5eb 139
timo_k2 0:87339e72a5eb 140 alsRaw = als8bit; //
timo_k2 0:87339e72a5eb 141 alsScaledF = (float(alsRaw))*(float(6.68)); // The value 6.68 is 64 bit double precision floating point of type double.
timo_k2 0:87339e72a5eb 142 // Conversions to 32 bit floating point of type float.
timo_k2 0:87339e72a5eb 143 printf("Ambient light raw 8 bit 0...255 = '%d' \r\n",alsRaw);
timo_k2 0:87339e72a5eb 144 printf("Ambient light scaled to LUX = '%0.1f' \r\n",alsScaledF);
timo_k2 0:87339e72a5eb 145 wait_ms(100);
timo_k2 0:87339e72a5eb 146 }
timo_k2 0:87339e72a5eb 147