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@5:19681da9b789, 2015-05-04 (annotated)

Committer:
stevew817
Date:
Mon May 04 16:25:55 2015 +0000
Revision:
5:19681da9b789
Parent:
0:42249df8c223
Child:
6:2186477a8aa2
Get rid of test_env;

Who changed what in which revision?

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