Silicon Labs / Mbed 2 deprecated memLCD-Demo

Demo program for driving the memory LCD on the Zero Gecko Starter Kit.

Dependencies:   MemoryLCD mbed

This demo program shows how to drive the memory LCD on the Zero Gecko Starter Kit, by using asynchronous transfers.

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

Committer:
stevew817
Date:
2016-09-12
Revision:
14:7acb1c561848
Parent:
12:542a3be118c1

File content as of revision 14:7acb1c561848:

#include "LS013B7DH03.h"
#include "mbed_logo.h"
/******************** Define I/O *****************************/
DigitalOut myled(LED1);

#if defined(TARGET_EFM32ZG_STK3200)
#define SCK_PIN     PC15
#define MOSI_PIN    PD7
#define CS_PIN      PE11
#define EXTCOM_PIN  PE10
#define DISP_PIN    PA10
#define DISPSEL_PIN PA8
#elif defined (TARGET_EFM32HG_STK3400)
#define SCK_PIN     PE12
#define MOSI_PIN    PE10
#define CS_PIN      PA10
#define EXTCOM_PIN  PF3
#define DISPSEL_PIN PA8
#else
#error "undefined pinout"
#endif
 
DigitalOut CS(CS_PIN);
DigitalOut EXTCOM(EXTCOM_PIN);
#ifdef DISP_PIN
DigitalOut DISP(DISP_PIN);
#endif
DigitalOut DISP_SEL(DISPSEL_PIN);
 
SPI displaySPI(MOSI_PIN, NC, SCK_PIN);
silabs::LS013B7DH03 display(&displaySPI, &CS, &EXTCOM);

/******************** Define Timers *****************************/
 
LowPowerTicker timeKeeping;
 
/***************** Define global variables **********************/
#define INIT_SECONDS        17600
 
volatile uint32_t prevSeconds = INIT_SECONDS, seconds = INIT_SECONDS;
volatile bool refreshed = false;
 
/***************** Define callback handlers *********************/
void secondsCallback(void);
void refreshCallback(void);
 
void secondsCallback(void) {
    seconds++;
}
 
/**
 * Callback for refresh completion
 */
void refreshCallback(void) {
    refreshed = true;
}
 
/*************************** MAIN *******************************/
int main() {
    // Enable the LCD
    DISP_SEL = 1;
#ifdef DISP_PIN
    DISP = 1;
#endif
 
    // Start generating the 1Hz call for keeping time
    timeKeeping.attach(&secondsCallback, 1.0f);
 
    // Reset the LCD to a blank state. (All white)
    refreshed = false;
    display.clearImmediate(refreshCallback);
    while(refreshed == false) sleep();
 
    printf("Initialization done! \n");
 
    // Apply mbed logo bitmap to the pixel buffer
    display.showBMP((uint8_t*)mbed_enabled_logo, 128, 128, 0, 0);
    display.printf("I like MBED!");
 
    // Push update to the display
    refreshed = false;
    display.update(refreshCallback);
 
    // Sleep while doing the transmit
    while(refreshed == false) sleep();
 
    // Go into clock mode
    while(1) {
        sleep();
 
        // In clock mode, only update once per second
        if(prevSeconds != seconds) {
            display.locate(4,15);
            display.printf("%02d:%02d:%02d", (seconds / 1200) % 24, (seconds / 60) % 60, seconds % 60);
            if(refreshed == true) {
                prevSeconds = seconds;
                refreshed = false;
                display.update(refreshCallback);
                while(!refreshed) sleep();
            }
        }
    }
}