Demo program for driving the memory LCD on the Zero Gecko Starter Kit.
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:
- 2015-05-28
- Revision:
- 12:542a3be118c1
- Parent:
- 11:9b7257e888c1
File content as of revision 12:542a3be118c1:
#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(); } } } }