Silicon Labs / Mbed 2 deprecated MemLCD-Temperature-Humidity-Demo Featured

MemLCD-Temperature-Humidity-Demo: This is an example program for the Happy Gecko starter kit, which includes an on-board Sharp memory LCD, and a Silicon Labs si7021 relative humidity and temperature sensor.

Dependencies:   MemoryLCD SILABS_RHT mbed

Demo of memory LCD and RHT library

Demo running on Happy Gecko starter kit

This demo is meant to run on a Silicon Labs EFM32 Happy Gecko Starter Kit, and will demonstrate the use of the Memory LCD and si70xx sensor libraries. It can exclusively be used with the low-power version of mbed.

For documentation on the libraries, please refer to the respective library pages.

Information

All examples in this repo are considered EXPERIMENTAL QUALITY, meaning this code has been created as one-off proof-of-concept and is suitable as a demonstration for experimental purposes only. This code will not be regularly maintained by Silicon Labs and there is no guarantee that these projects will work across all environments, SDK versions and hardware.

main.cpp@0:42249df8c223, 2015-04-17 (annotated)

Committer:
stevew817
Date:
Fri Apr 17 14:55:18 2015 +0000
Revision:
0:42249df8c223
Child:
5:19681da9b789
Initial upload;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
stevew817 0:42249df8c223 1 #include "test_env.h"
stevew817 0:42249df8c223 2 #include "LS013B7DH03.h"
stevew817 0:42249df8c223 3 #include "SILABS_RHT.h"
stevew817 0:42249df8c223 4 #include "mbed_logo.h"
stevew817 0:42249df8c223 5 #include "Animation.h"
stevew817 0:42249df8c223 6
stevew817 0:42249df8c223 7 /******************** Define I/O *****************************/
stevew817 0:42249df8c223 8
stevew817 0:42249df8c223 9 InterruptIn in(SW0);
stevew817 0:42249df8c223 10
stevew817 0:42249df8c223 11 #define SCK PE12
stevew817 0:42249df8c223 12 #define MOSI PE10
stevew817 0:42249df8c223 13
stevew817 0:42249df8c223 14 DigitalOut CS(PA10);
stevew817 0:42249df8c223 15 DigitalOut EXTCOM(PF3);
stevew817 0:42249df8c223 16 DigitalOut DISP(PA8);
stevew817 0:42249df8c223 17
stevew817 0:42249df8c223 18 SPI displaySPI(MOSI, NC, SCK);
stevew817 0:42249df8c223 19 silabs::LS013B7DH03 display(&displaySPI, &CS, &EXTCOM);
stevew817 0:42249df8c223 20
stevew817 0:42249df8c223 21 I2C sensorI2C(PD6, PD7);
stevew817 0:42249df8c223 22 DigitalOut SENS_EN(PC8);
stevew817 0:42249df8c223 23 silabs::SILABS_RHT rhtSensor(&sensorI2C);
stevew817 0:42249df8c223 24
stevew817 0:42249df8c223 25 /******************** Define Timers *****************************/
stevew817 0:42249df8c223 26
stevew817 0:42249df8c223 27 LowPowerTicker timeKeeping;
stevew817 0:42249df8c223 28
stevew817 0:42249df8c223 29 /***************** Define global variables **********************/
stevew817 0:42249df8c223 30 #define INIT_SECONDS 17600
stevew817 0:42249df8c223 31 #define TEST_DURATION 10
stevew817 0:42249df8c223 32
stevew817 0:42249df8c223 33 volatile uint32_t prevSeconds = INIT_SECONDS, seconds = INIT_SECONDS;
stevew817 0:42249df8c223 34 volatile bool refreshed = false;
stevew817 0:42249df8c223 35 volatile bool clockShown = false;
stevew817 0:42249df8c223 36 volatile bool measured = false;
stevew817 0:42249df8c223 37
stevew817 0:42249df8c223 38 typedef enum {
stevew817 0:42249df8c223 39 CLOCK,
stevew817 0:42249df8c223 40 DODECA
stevew817 0:42249df8c223 41 } display_mode_t;
stevew817 0:42249df8c223 42
stevew817 0:42249df8c223 43 volatile display_mode_t currentMode = CLOCK;
stevew817 0:42249df8c223 44 uint8_t currentFrame = 0;
stevew817 0:42249df8c223 45
stevew817 0:42249df8c223 46 /***************** Define callback handlers *********************/
stevew817 0:42249df8c223 47 void secondsCallback(void);
stevew817 0:42249df8c223 48 void in_handler();
stevew817 0:42249df8c223 49 void toggleCallback(void);
stevew817 0:42249df8c223 50
stevew817 0:42249df8c223 51 /***************** Define helper functions ***********************/
stevew817 0:42249df8c223 52 void drawTemperature(int32_t temperature);
stevew817 0:42249df8c223 53
stevew817 0:42249df8c223 54 void drawTemperature(int32_t temperature) {
stevew817 0:42249df8c223 55 uint32_t line = 20;
stevew817 0:42249df8c223 56 int8_t int_temp = temperature / 500;
stevew817 0:42249df8c223 57
stevew817 0:42249df8c223 58 for(int8_t iterator = 80; iterator > -6; iterator--) {
stevew817 0:42249df8c223 59 if(int_temp >= iterator) display.fill(108,line,10,1,Black);
stevew817 0:42249df8c223 60 else display.fill(108,line,10,1,White);
stevew817 0:42249df8c223 61
stevew817 0:42249df8c223 62 line += 1;
stevew817 0:42249df8c223 63 }
stevew817 0:42249df8c223 64 }
stevew817 0:42249df8c223 65
stevew817 0:42249df8c223 66 /**
stevew817 0:42249df8c223 67 * Callback for pushbutton interrupt
stevew817 0:42249df8c223 68 */
stevew817 0:42249df8c223 69 void in_handler() {
stevew817 0:42249df8c223 70 if(currentMode == CLOCK) {
stevew817 0:42249df8c223 71 currentMode = DODECA;
stevew817 0:42249df8c223 72 } else {
stevew817 0:42249df8c223 73 currentMode = CLOCK;
stevew817 0:42249df8c223 74 clockShown = false;
stevew817 0:42249df8c223 75 }
stevew817 0:42249df8c223 76 }
stevew817 0:42249df8c223 77
stevew817 0:42249df8c223 78 void secondsCallback(void) {
stevew817 0:42249df8c223 79 seconds++;
stevew817 0:42249df8c223 80 }
stevew817 0:42249df8c223 81
stevew817 0:42249df8c223 82 /**
stevew817 0:42249df8c223 83 * Callback for refresh completion
stevew817 0:42249df8c223 84 */
stevew817 0:42249df8c223 85 void refreshCallback(void) {
stevew817 0:42249df8c223 86 refreshed = true;
stevew817 0:42249df8c223 87 }
stevew817 0:42249df8c223 88
stevew817 0:42249df8c223 89 /**
stevew817 0:42249df8c223 90 * Callback for measurement completion
stevew817 0:42249df8c223 91 */
stevew817 0:42249df8c223 92 void measureCallback(void) {
stevew817 0:42249df8c223 93 if(rhtSensor.get_active()) {
stevew817 0:42249df8c223 94 measured = true;
stevew817 0:42249df8c223 95 }
stevew817 0:42249df8c223 96 }
stevew817 0:42249df8c223 97
stevew817 0:42249df8c223 98 /*************************** MAIN *******************************/
stevew817 0:42249df8c223 99 int main() {
stevew817 0:42249df8c223 100 // Initialize pushbutton handler
stevew817 0:42249df8c223 101 in.rise(NULL);
stevew817 0:42249df8c223 102 in.fall(in_handler);
stevew817 0:42249df8c223 103
stevew817 0:42249df8c223 104 // Enable the LCD
stevew817 0:42249df8c223 105 DISP = 1;
stevew817 0:42249df8c223 106
stevew817 0:42249df8c223 107 // Enable the I2C RHT sensor
stevew817 0:42249df8c223 108 SENS_EN = 1;
stevew817 0:42249df8c223 109
stevew817 0:42249df8c223 110 // Start generating the 1Hz call for the timekeeping
stevew817 0:42249df8c223 111 timeKeeping.attach(&secondsCallback, 1.0f);
stevew817 0:42249df8c223 112
stevew817 0:42249df8c223 113 // Reset the LCD to a blank state. (All white)
stevew817 0:42249df8c223 114 refreshed = false;
stevew817 0:42249df8c223 115 display.clearImmediate(refreshCallback);
stevew817 0:42249df8c223 116 while(refreshed == false) sleep();
stevew817 0:42249df8c223 117
stevew817 0:42249df8c223 118 printf("Initialization done! \n");
stevew817 0:42249df8c223 119
stevew817 0:42249df8c223 120 // Apply mbed logo bitmap to the pixel buffer
stevew817 0:42249df8c223 121 display.showBMP((uint8_t*)mbed_enabled_logo, 128, 128, 0, 0);
stevew817 0:42249df8c223 122 display.background(Black);
stevew817 0:42249df8c223 123 display.foreground(White);
stevew817 0:42249df8c223 124 display.printf("I like MBED!");
stevew817 0:42249df8c223 125
stevew817 0:42249df8c223 126 // Push update to the display
stevew817 0:42249df8c223 127 uint32_t refreshCount = display.getRefreshTicks();
stevew817 0:42249df8c223 128 refreshed = false;
stevew817 0:42249df8c223 129 display.update(refreshCallback);
stevew817 0:42249df8c223 130
stevew817 0:42249df8c223 131 // Sleep while doing the transmit
stevew817 0:42249df8c223 132 while(refreshed == false) sleep();
stevew817 0:42249df8c223 133
stevew817 0:42249df8c223 134 // Calculate and print refresh duration
stevew817 0:42249df8c223 135 refreshCount = display.getRefreshTicks() - refreshCount;
stevew817 0:42249df8c223 136 printf("Refresh duration: %d cycles @ 125Hz \n", (int)refreshCount);
stevew817 0:42249df8c223 137
stevew817 0:42249df8c223 138 // Perform a measurement
stevew817 0:42249df8c223 139 rhtSensor.check_availability(si7021, measureCallback);
stevew817 0:42249df8c223 140 while(measured == false);
stevew817 0:42249df8c223 141
stevew817 0:42249df8c223 142 /* Main loop */
stevew817 0:42249df8c223 143 while(1) {
stevew817 0:42249df8c223 144 sleep();
stevew817 0:42249df8c223 145
stevew817 0:42249df8c223 146 // In clock mode, only update once per second
stevew817 0:42249df8c223 147 if((currentMode == CLOCK) && (prevSeconds != seconds)) {
stevew817 0:42249df8c223 148 /* Redraw background when coming from video mode */
stevew817 0:42249df8c223 149 if(clockShown == false) {
stevew817 0:42249df8c223 150 display.showBMP((uint8_t*)mbed_enabled_logo, 128, 128, 0, 0);
stevew817 0:42249df8c223 151 clockShown = true;
stevew817 0:42249df8c223 152 }
stevew817 0:42249df8c223 153
stevew817 0:42249df8c223 154 /* Show numeric measurements */
stevew817 0:42249df8c223 155 display.locate(0,13);
stevew817 0:42249df8c223 156 display.printf("%02d.%01d degC", rhtSensor.get_temperature() / 1000, (rhtSensor.get_temperature() % 1000) / 100);
stevew817 0:42249df8c223 157 display.locate(0,14);
stevew817 0:42249df8c223 158 display.printf("%03d.%03d%%H", rhtSensor.get_humidity() / 1000, rhtSensor.get_humidity() % 1000);
stevew817 0:42249df8c223 159
stevew817 0:42249df8c223 160 /* Show clock */
stevew817 0:42249df8c223 161 display.locate(4,15);
stevew817 0:42249df8c223 162 display.printf("%02d:%02d:%02d", (seconds / 1200) % 24, (seconds / 60) % 60, seconds % 60);
stevew817 0:42249df8c223 163
stevew817 0:42249df8c223 164 /* Update the graphical thermometer */
stevew817 0:42249df8c223 165 drawTemperature(rhtSensor.get_temperature());
stevew817 0:42249df8c223 166
stevew817 0:42249df8c223 167 if(refreshed == true) {
stevew817 0:42249df8c223 168 prevSeconds = seconds;
stevew817 0:42249df8c223 169 refreshed = false;
stevew817 0:42249df8c223 170
stevew817 0:42249df8c223 171 /* Perform both I/O tasks simultaneously */
stevew817 0:42249df8c223 172 display.update(refreshCallback);
stevew817 0:42249df8c223 173 rhtSensor.measure(si7021);
stevew817 0:42249df8c223 174 }
stevew817 0:42249df8c223 175 }
stevew817 0:42249df8c223 176 // In dodecaeder mode, show frames as fast as possible
stevew817 0:42249df8c223 177 else if(currentMode == DODECA) {
stevew817 0:42249df8c223 178 if(refreshed == true) {
stevew817 0:42249df8c223 179 display.showBMP((uint8_t*)(frames[currentFrame]->pData), 128, 128, 0, 0);
stevew817 0:42249df8c223 180 currentFrame++;
stevew817 0:42249df8c223 181 if( currentFrame >= NUM_FRAMES ) currentFrame = 0;
stevew817 0:42249df8c223 182 refreshed = false;
stevew817 0:42249df8c223 183 display.update(refreshCallback);
stevew817 0:42249df8c223 184 }
stevew817 0:42249df8c223 185 }
stevew817 0:42249df8c223 186 }
stevew817 0:42249df8c223 187
stevew817 0:42249df8c223 188 //notify_completion(true);
stevew817 0:42249df8c223 189 }
stevew817 0:42249df8c223 190