Timo Karppinen / Mbed OS Pmod_OLEDrgb_ALS1_L432KC

A concept design laboratory prototype for measuring ambient light value. The high levels typically mean that there is high rates of UVA and 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. Tested as well on ST L432KC.

Dependencies:   Adafruit_SSD1331_Mbed Adafruit-GFX

main.cpp@1:fde67a85d481, 2020-05-16 (annotated)

Committer:
timo_k2
Date:
Sat May 16 15:45:45 2020 +0000
Revision:
1:fde67a85d481
Parent:
0:87339e72a5eb
Child:
2:0eed70300cb4
Pmod OLEDrgb display and Pmod ALS sensor are tested with board ST L432KC. Both are using the SPI communication.

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 1:fde67a85d481 4 ************************************************************************
timo_k2 1:fde67a85d481 5 *
timo_k2 1:fde67a85d481 6 * Test of the Pmod small OLED display and ambient light sensor
timo_k2 1:fde67a85d481 7 *
timo_k2 1:fde67a85d481 8 *************************************************************************
timo_k2 1:fde67a85d481 9 * Description: Pmod_OLED_ALS1
timo_k2 1:fde67a85d481 10 * The message "Test module Pmod Digilent Lextronic" will be display on OLEDrgb module
timo_k2 1:fde67a85d481 11 * with different size and colors..... and sensor value as well.
timo_k2 1:fde67a85d481 12 *
timo_k2 1:fde67a85d481 13 * Material
timo_k2 1:fde67a85d481 14 * 1. ST L432KC ( or some other micro controller board with SPI communication )
timo_k2 1:fde67a85d481 15 * 2. Digilent Pmod OLEDrgb and the libraries
timo_k2 1:fde67a85d481 16 * Adafruit_SSD1331_Mbed
timo_k2 1:fde67a85d481 17 * Adafruit-GFX
timo_k2 1:fde67a85d481 18 * These libraries can be found with search on the page
timo_k2 1:fde67a85d481 19 * https://www.mbed.com/en/platform/mbed-os/
timo_k2 1:fde67a85d481 20 * Please connect L432KC - Pmod_OLEDrgb with lines:
timo_k2 1:fde67a85d481 21 * L432KC D13 - OLED 4 SCK hardware defined for the SPI
timo_k2 1:fde67a85d481 22 * L432KC D11 - OLED 2 MOSI hardware definef for the SPI
timo_k2 1:fde67a85d481 23 * L432KC D9 - OLED 1 CS or any other free
timo_k2 1:fde67a85d481 24 * L432KC D10 - OLED 7 DC or any other free
timo_k2 1:fde67a85d481 25 * L432KC D6 - OLED 8 RES or any other free
timo_k2 1:fde67a85d481 26 * VCC - OLED 9 VCCEN Enable - VCC
timo_k2 1:fde67a85d481 27 * VCC - OLED10 PMODEN Pmod Enable - VCC
timo_k2 1:fde67a85d481 28 * GND - OLED 5 Ground
timo_k2 1:fde67a85d481 29 * VCC - OLED 6 Power supply 3,3 V
timo_k2 1:fde67a85d481 30 *
timo_k2 1:fde67a85d481 31 *************************************************************************
timo_k2 1:fde67a85d481 32 * 3. Digilent Pmod ALS ambient light sensor
timo_k2 1:fde67a85d481 33 * Please connect L432KC - PmodALS with lines:
timo_k2 1:fde67a85d481 34 * L432KC D13 - ALS 4 SCK hardware defined for the SPI
timo_k2 1:fde67a85d481 35 * L432KC D12 - ALS 3 MISO hardware defined for the SPI
timo_k2 1:fde67a85d481 36 * L432KC D4 - ALS 1 CS or any other free
timo_k2 1:fde67a85d481 37 * GND - ALS 5 GND
timo_k2 1:fde67a85d481 38 * Vcc - ALS 6 Vcc
timo_k2 1:fde67a85d481 39
timo_k2 1:fde67a85d481 40 ALS data on the SPI
timo_k2 1:fde67a85d481 41 D15 ... D13 - three zeros
timo_k2 1:fde67a85d481 42 D12 ... D04 - 8 bits of ambient light data
timo_k2 1:fde67a85d481 43 D03 ... D00 - four zeros
timo_k2 1:fde67a85d481 44
timo_k2 1:fde67a85d481 45 Details on the connection of ADC IC chip on ALS board are given
timo_k2 1:fde67a85d481 46 http://www.ti.com/lit/ds/symlink/adc081s021.pdf
timo_k2 1:fde67a85d481 47 *
timo_k2 1:fde67a85d481 48 * Timo Karppinen 16.05.2020
timo_k2 1:fde67a85d481 49 **************************************************************/
timo_k2 1:fde67a85d481 50
timo_k2 0:87339e72a5eb 51
timo_k2 0:87339e72a5eb 52 #include "mbed.h"
timo_k2 1:fde67a85d481 53 #include "Adafruit_SSD1331.h" // By using the Adafruit SSD1331 library and Adafruit GFX library
timo_k2 1:fde67a85d481 54 #include "Adafruit_GFX.h" // we will get similar code than in Arduino-boards working.
timo_k2 1:fde67a85d481 55 // There are other SSD1331 libraries, too. https://os.mbed.com/search/?q=ssd1331
timo_k2 1:fde67a85d481 56
timo_k2 0:87339e72a5eb 57 // PmodOLEDrgb
timo_k2 1:fde67a85d481 58 Adafruit_SSD1331 OLED(D9, D6, D10, D11, NC, D13); // cs, res, dc, mosi, (nc), sck
timo_k2 0:87339e72a5eb 59
timo_k2 1:fde67a85d481 60 //DigitalOut LED(LED1); // LED1, LED2, LED3 and LED4 are the D13 PB_3 pin in this board and can not be used because of the SPI
timo_k2 1:fde67a85d481 61 DigitalOut VCCEN(D3);
timo_k2 0:87339e72a5eb 62 DigitalOut PMODEN(D5);
timo_k2 0:87339e72a5eb 63
timo_k2 0:87339e72a5eb 64 // Definition of colors on the OLED display
timo_k2 0:87339e72a5eb 65 #define Black 0x0000
timo_k2 0:87339e72a5eb 66 #define Blue 0x001F
timo_k2 0:87339e72a5eb 67 #define Red 0xF800
timo_k2 0:87339e72a5eb 68 #define Green 0x07E0
timo_k2 0:87339e72a5eb 69 #define Cyan 0x07FF
timo_k2 0:87339e72a5eb 70 #define Magenta 0xF81F
timo_k2 0:87339e72a5eb 71 #define Yellow 0xFFE0
timo_k2 0:87339e72a5eb 72 #define White 0xFFFF
timo_k2 0:87339e72a5eb 73
timo_k2 0:87339e72a5eb 74 // PmodALS
timo_k2 0:87339e72a5eb 75 SPI spi(D11, D12, D13); // mosi, miso, sck
timo_k2 0:87339e72a5eb 76
timo_k2 0:87339e72a5eb 77
timo_k2 0:87339e72a5eb 78 DigitalOut alsCS(D4); // chip select for sensor SPI communication
timo_k2 0:87339e72a5eb 79 char alsByte0 = 0; // 8 bit data from sensor board, char is the unsigned 8 bit
timo_k2 0:87339e72a5eb 80 char alsByte1 = 0; // 8 bit data from sensor board
timo_k2 0:87339e72a5eb 81 char alsByteSh0 = 0;
timo_k2 0:87339e72a5eb 82 char alsByteSh1 = 0;
timo_k2 0:87339e72a5eb 83 char als8bit = 0;
timo_k2 0:87339e72a5eb 84 unsigned short alsRaw = 0; // unsigned 16 bit
timo_k2 0:87339e72a5eb 85 float alsScaledF = 0; // 32 bit floating point
timo_k2 0:87339e72a5eb 86 void getALS();
timo_k2 0:87339e72a5eb 87
timo_k2 0:87339e72a5eb 88
timo_k2 0:87339e72a5eb 89 char Time[50],Date[50];
timo_k2 0:87339e72a5eb 90 void getTime();
timo_k2 1:fde67a85d481 91 int first = 0;
timo_k2 0:87339e72a5eb 92
timo_k2 0:87339e72a5eb 93 int main()
timo_k2 0:87339e72a5eb 94 {
timo_k2 0:87339e72a5eb 95 // Showing with a LED that program has started
timo_k2 1:fde67a85d481 96 // LED = 0;
timo_k2 0:87339e72a5eb 97 VCCEN = 1; // if you did not connect VCCEN permanently to Vcc
timo_k2 0:87339e72a5eb 98 PMODEN = 1; // if you did not connect PMODEN permanently to Vcc
timo_k2 1:fde67a85d481 99 ThisThread::sleep_for(2000);
timo_k2 1:fde67a85d481 100 // LED = 1;
timo_k2 1:fde67a85d481 101 ThisThread::sleep_for(2000);
timo_k2 1:fde67a85d481 102 // LED = 0;
timo_k2 0:87339e72a5eb 103 // Initalize the PmodOLEDrgb
timo_k2 1:fde67a85d481 104 OLED.begin(); // initialization of display object
timo_k2 0:87339e72a5eb 105
timo_k2 0:87339e72a5eb 106 // SPI for the ALS
timo_k2 0:87339e72a5eb 107 alsCS = 1;
timo_k2 0:87339e72a5eb 108 // Setup the spi for 8 bit data, high steady state clock,
timo_k2 0:87339e72a5eb 109 // second edge capture, with a 12MHz clock rate
timo_k2 0:87339e72a5eb 110 spi.format(8,0);
timo_k2 1:fde67a85d481 111 spi.frequency(12000000);
timo_k2 1:fde67a85d481 112
timo_k2 1:fde67a85d481 113 OLED.clearScreen();
timo_k2 0:87339e72a5eb 114
timo_k2 0:87339e72a5eb 115 while (true) {
timo_k2 0:87339e72a5eb 116 while(first < 3)
timo_k2 0:87339e72a5eb 117 {
timo_k2 0:87339e72a5eb 118 first += 1;
timo_k2 0:87339e72a5eb 119 OLED.fillScreen(Black); // background screen in black
timo_k2 0:87339e72a5eb 120 OLED.setTextColor(Cyan); // color of text in cyan
timo_k2 0:87339e72a5eb 121 OLED.setCursor(0,0); // cursor is in x=0 and y=15
timo_k2 0:87339e72a5eb 122 OLED.printf("Test module Pmod"); // display text
timo_k2 1:fde67a85d481 123 ThisThread::sleep_for(500); // wait 500 ms
timo_k2 0:87339e72a5eb 124 OLED.setCursor(0,15); // cursor is in x=0 and y=15
timo_k2 0:87339e72a5eb 125 OLED.setTextSize(2); // size of text
timo_k2 0:87339e72a5eb 126 OLED.setTextColor(Red); // text in red color
timo_k2 0:87339e72a5eb 127 OLED.printf("DIGILENT"); // display text
timo_k2 0:87339e72a5eb 128 OLED.setCursor(20,40); // cursor is in x=20 and y=40
timo_k2 0:87339e72a5eb 129 OLED.setTextSize(1); // size of text
timo_k2 0:87339e72a5eb 130 OLED.setTextColor(Green); // text in green color
timo_k2 0:87339e72a5eb 131 OLED.printf("LEXTRONIC"); // display text
timo_k2 0:87339e72a5eb 132 OLED.drawFastHLine(1, 60, OLED.width()-1, Blue); // blue line x=1 to screen width-1 and y=60
timo_k2 1:fde67a85d481 133 ThisThread::sleep_for(2000); // wait 2 s
timo_k2 0:87339e72a5eb 134 OLED.fillScreen(Black); // background display in black (erase display)
timo_k2 0:87339e72a5eb 135 OLED.fillRoundRect(5, 5, 30, 40, 1, Blue); // French flag bleu blanc rouge
timo_k2 0:87339e72a5eb 136 OLED.fillRoundRect(35, 5, 30, 40, 1, White);
timo_k2 0:87339e72a5eb 137 OLED.fillRoundRect(65, 5, 30, 40, 1, Red);
timo_k2 0:87339e72a5eb 138 OLED.fillCircle(90, 55, 5, Yellow); // yellow circle with radius=5 in x=90 and y=55
timo_k2 1:fde67a85d481 139 ThisThread::sleep_for(2000); // wait 2 s
timo_k2 0:87339e72a5eb 140 }
timo_k2 0:87339e72a5eb 141
timo_k2 0:87339e72a5eb 142 getTime();
timo_k2 1:fde67a85d481 143 OLED.clearScreen();
timo_k2 0:87339e72a5eb 144 OLED.fillScreen(Black); // background screen in black
timo_k2 0:87339e72a5eb 145 OLED.setTextColor(Cyan); // color of text in cyan
timo_k2 1:fde67a85d481 146 ThisThread::sleep_for(300);
timo_k2 0:87339e72a5eb 147 OLED.setCursor(0,0); // cursor is in x=0 and y=0
timo_k2 1:fde67a85d481 148 OLED.printf("Rec '%s' \n",Time);
timo_k2 0:87339e72a5eb 149
timo_k2 0:87339e72a5eb 150 getALS();
timo_k2 1:fde67a85d481 151 OLED.printf("LUX = '%0.1f' \n",alsScaledF);
timo_k2 0:87339e72a5eb 152
timo_k2 0:87339e72a5eb 153 if (alsScaledF > 100)
timo_k2 0:87339e72a5eb 154 {
timo_k2 0:87339e72a5eb 155 OLED.setTextColor(Yellow);
timo_k2 0:87339e72a5eb 156 OLED.printf("Be aware of high UV radiation!");
timo_k2 0:87339e72a5eb 157 OLED.fillRoundRect(10, 35, 50, 3 , 1, Yellow);
timo_k2 0:87339e72a5eb 158 }
timo_k2 0:87339e72a5eb 159 OLED.setCursor(0,40); // cursor is in x=0 and y=0
timo_k2 0:87339e72a5eb 160 OLED.printf("Test completed");
timo_k2 1:fde67a85d481 161 OLED.drawFastHLine(1, 60, OLED.width()-1, Blue); // blue line x=1 to screen width-1 and y=60
timo_k2 0:87339e72a5eb 162 printf("printed on OLED");
timo_k2 0:87339e72a5eb 163
timo_k2 1:fde67a85d481 164 ThisThread::sleep_for(3000);
timo_k2 0:87339e72a5eb 165 }
timo_k2 0:87339e72a5eb 166 }
timo_k2 0:87339e72a5eb 167
timo_k2 0:87339e72a5eb 168 void getTime()
timo_k2 0:87339e72a5eb 169 {
timo_k2 0:87339e72a5eb 170 time_t seconds = time(NULL);
timo_k2 0:87339e72a5eb 171 strftime(Time,40,"%H:%M:%S", localtime(&seconds));
timo_k2 0:87339e72a5eb 172 strftime(Date,40,"%d-%b-%Y", localtime(&seconds));
timo_k2 0:87339e72a5eb 173 printf("Recorded '%s' \r\n",Time);
timo_k2 0:87339e72a5eb 174 }
timo_k2 0:87339e72a5eb 175
timo_k2 0:87339e72a5eb 176 void getALS()
timo_k2 0:87339e72a5eb 177 {
timo_k2 0:87339e72a5eb 178 alsCS = 0;
timo_k2 0:87339e72a5eb 179
timo_k2 0:87339e72a5eb 180 alsByte0 = spi.write(0x00);
timo_k2 0:87339e72a5eb 181 alsByte1 = spi.write(0x00);
timo_k2 0:87339e72a5eb 182
timo_k2 0:87339e72a5eb 183 alsCS = 1;
timo_k2 0:87339e72a5eb 184
timo_k2 0:87339e72a5eb 185 alsByteSh0 = alsByte0 << 4;
timo_k2 0:87339e72a5eb 186 alsByteSh1 = alsByte1 >> 4;
timo_k2 0:87339e72a5eb 187
timo_k2 0:87339e72a5eb 188 als8bit =( alsByteSh0 | alsByteSh1 );
timo_k2 0:87339e72a5eb 189
timo_k2 0:87339e72a5eb 190 alsRaw = als8bit; //
timo_k2 0:87339e72a5eb 191 alsScaledF = (float(alsRaw))*(float(6.68)); // The value 6.68 is 64 bit double precision floating point of type double.
timo_k2 0:87339e72a5eb 192 // Conversions to 32 bit floating point of type float.
timo_k2 0:87339e72a5eb 193 printf("Ambient light raw 8 bit 0...255 = '%d' \r\n",alsRaw);
timo_k2 0:87339e72a5eb 194 printf("Ambient light scaled to LUX = '%0.1f' \r\n",alsScaledF);
timo_k2 1:fde67a85d481 195 ThisThread::sleep_for(100);
timo_k2 0:87339e72a5eb 196 }
timo_k2 0:87339e72a5eb 197