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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@6:f334f0adb99b, 2015-04-17 (annotated)
- Committer:
- stevew817
- Date:
- Fri Apr 17 19:36:10 2015 +0000
- Revision:
- 6:f334f0adb99b
- Parent:
- 0:ecfcdf193e3d
Update pinout for ZG
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
stevew817 | 0:ecfcdf193e3d | 1 | #include "LS013B7DH03.h" |
stevew817 | 0:ecfcdf193e3d | 2 | #include "mbed_logo.h" |
stevew817 | 0:ecfcdf193e3d | 3 | /******************** Define I/O *****************************/ |
stevew817 | 0:ecfcdf193e3d | 4 | DigitalOut myled(LED1); |
stevew817 | 0:ecfcdf193e3d | 5 | |
stevew817 | 6:f334f0adb99b | 6 | #define SCK PC15 |
stevew817 | 6:f334f0adb99b | 7 | #define MOSI PD7 |
stevew817 | 0:ecfcdf193e3d | 8 | |
stevew817 | 6:f334f0adb99b | 9 | DigitalOut CS(PE11); |
stevew817 | 6:f334f0adb99b | 10 | DigitalOut EXTCOM(PE10); |
stevew817 | 6:f334f0adb99b | 11 | DigitalOut DISP(PA10); |
stevew817 | 6:f334f0adb99b | 12 | DigitalOut DISP_SEL(PA8); |
stevew817 | 0:ecfcdf193e3d | 13 | |
stevew817 | 0:ecfcdf193e3d | 14 | SPI displaySPI(MOSI, NC, SCK); |
stevew817 | 0:ecfcdf193e3d | 15 | silabs::LS013B7DH03 display(&displaySPI, &CS, &EXTCOM); |
stevew817 | 0:ecfcdf193e3d | 16 | |
stevew817 | 0:ecfcdf193e3d | 17 | /******************** Define Timers *****************************/ |
stevew817 | 0:ecfcdf193e3d | 18 | |
stevew817 | 0:ecfcdf193e3d | 19 | LowPowerTicker timeKeeping; |
stevew817 | 0:ecfcdf193e3d | 20 | |
stevew817 | 0:ecfcdf193e3d | 21 | /***************** Define global variables **********************/ |
stevew817 | 0:ecfcdf193e3d | 22 | #define INIT_SECONDS 17600 |
stevew817 | 0:ecfcdf193e3d | 23 | |
stevew817 | 0:ecfcdf193e3d | 24 | volatile uint32_t prevSeconds = INIT_SECONDS, seconds = INIT_SECONDS; |
stevew817 | 0:ecfcdf193e3d | 25 | volatile bool refreshed = false; |
stevew817 | 0:ecfcdf193e3d | 26 | |
stevew817 | 0:ecfcdf193e3d | 27 | /***************** Define callback handlers *********************/ |
stevew817 | 0:ecfcdf193e3d | 28 | void secondsCallback(void); |
stevew817 | 0:ecfcdf193e3d | 29 | void refreshCallback(void); |
stevew817 | 0:ecfcdf193e3d | 30 | |
stevew817 | 0:ecfcdf193e3d | 31 | void secondsCallback(void) { |
stevew817 | 0:ecfcdf193e3d | 32 | seconds++; |
stevew817 | 0:ecfcdf193e3d | 33 | } |
stevew817 | 0:ecfcdf193e3d | 34 | |
stevew817 | 0:ecfcdf193e3d | 35 | /** |
stevew817 | 0:ecfcdf193e3d | 36 | * Callback for refresh completion |
stevew817 | 0:ecfcdf193e3d | 37 | */ |
stevew817 | 0:ecfcdf193e3d | 38 | void refreshCallback(void) { |
stevew817 | 0:ecfcdf193e3d | 39 | refreshed = true; |
stevew817 | 0:ecfcdf193e3d | 40 | } |
stevew817 | 0:ecfcdf193e3d | 41 | |
stevew817 | 0:ecfcdf193e3d | 42 | /*************************** MAIN *******************************/ |
stevew817 | 0:ecfcdf193e3d | 43 | int main() { |
stevew817 | 0:ecfcdf193e3d | 44 | // Enable the LCD |
stevew817 | 6:f334f0adb99b | 45 | DISP_SEL = 1; |
stevew817 | 0:ecfcdf193e3d | 46 | DISP = 1; |
stevew817 | 0:ecfcdf193e3d | 47 | |
stevew817 | 0:ecfcdf193e3d | 48 | // Start generating the 1Hz call for keeping time |
stevew817 | 0:ecfcdf193e3d | 49 | timeKeeping.attach(&secondsCallback, 1.0f); |
stevew817 | 0:ecfcdf193e3d | 50 | |
stevew817 | 0:ecfcdf193e3d | 51 | // Reset the LCD to a blank state. (All white) |
stevew817 | 0:ecfcdf193e3d | 52 | refreshed = false; |
stevew817 | 0:ecfcdf193e3d | 53 | display.clearImmediate(refreshCallback); |
stevew817 | 0:ecfcdf193e3d | 54 | while(refreshed == false) sleep(); |
stevew817 | 0:ecfcdf193e3d | 55 | |
stevew817 | 0:ecfcdf193e3d | 56 | printf("Initialization done! \n"); |
stevew817 | 0:ecfcdf193e3d | 57 | |
stevew817 | 0:ecfcdf193e3d | 58 | // Apply mbed logo bitmap to the pixel buffer |
stevew817 | 0:ecfcdf193e3d | 59 | display.showBMP((uint8_t*)mbed_enabled_logo, 128, 128, 0, 0); |
stevew817 | 0:ecfcdf193e3d | 60 | display.printf("I like MBED!"); |
stevew817 | 0:ecfcdf193e3d | 61 | |
stevew817 | 0:ecfcdf193e3d | 62 | // Push update to the display |
stevew817 | 0:ecfcdf193e3d | 63 | refreshed = false; |
stevew817 | 0:ecfcdf193e3d | 64 | display.update(refreshCallback); |
stevew817 | 0:ecfcdf193e3d | 65 | |
stevew817 | 0:ecfcdf193e3d | 66 | // Sleep while doing the transmit |
stevew817 | 0:ecfcdf193e3d | 67 | while(refreshed == false) sleep(); |
stevew817 | 0:ecfcdf193e3d | 68 | |
stevew817 | 0:ecfcdf193e3d | 69 | // Go into clock mode |
stevew817 | 0:ecfcdf193e3d | 70 | while(1) { |
stevew817 | 0:ecfcdf193e3d | 71 | sleep(); |
stevew817 | 0:ecfcdf193e3d | 72 | |
stevew817 | 0:ecfcdf193e3d | 73 | // In clock mode, only update once per second |
stevew817 | 0:ecfcdf193e3d | 74 | if(prevSeconds != seconds) { |
stevew817 | 0:ecfcdf193e3d | 75 | display.locate(4,15); |
stevew817 | 0:ecfcdf193e3d | 76 | display.printf("%02d:%02d:%02d", (seconds / 1200) % 24, (seconds / 60) % 60, seconds % 60); |
stevew817 | 0:ecfcdf193e3d | 77 | if(refreshed == true) { |
stevew817 | 0:ecfcdf193e3d | 78 | prevSeconds = seconds; |
stevew817 | 0:ecfcdf193e3d | 79 | refreshed = false; |
stevew817 | 0:ecfcdf193e3d | 80 | display.update(refreshCallback); |
stevew817 | 0:ecfcdf193e3d | 81 | } |
stevew817 | 0:ecfcdf193e3d | 82 | } |
stevew817 | 0:ecfcdf193e3d | 83 | } |
stevew817 | 0:ecfcdf193e3d | 84 | } |