[iot_umbrella] #8 lcd - description

In project I used lcd from nokia 5110 (PCD8544 driver),

It is monochrome graphic lcd with resolution 84x48 pixels

In used ready hardware ( foto below )

and connected it into CC3200 LaunchPad ( schematic below )

Communication with lcd is done via SPI ( in one side mc->lcd )

I wrote software spi algorithm (code below )

void LcdSpiInit()
{
    // Configure PIN_05 for GPIOOutput (SPI_CLK)
    MAP_PinTypeGPIO(PIN_05, PIN_MODE_0, false);
    MAP_GPIODirModeSet(SPI_CLK_PORT, SPI_CLK_PIN, GPIO_DIR_MODE_OUT);

    // Configure PIN_02 for GPIOOutput (SPI_MOSI)
    MAP_PinTypeGPIO(PIN_02, PIN_MODE_0, false);
    MAP_GPIODirModeSet(SPI_MOSI_PORT, SPI_MOSI_PIN, GPIO_DIR_MODE_OUT);

    GPIOPinWrite(SPI_CLK_PORT,  SPI_CLK_PIN, SPI_CLK_PIN);
}

void SpiWriteByte(uInt8 data)
{
    uInt8 idx, l_data;

    l_data = data;

    for(idx=0; idx<8; idx ++)
    {
        GPIOPinWrite(SPI_CLK_PORT,  SPI_CLK_PIN, 0x00);

        if((l_data & 0x80) == 0x80)
           GPIOPinWrite(SPI_MOSI_PORT,  SPI_MOSI_PIN, SPI_MOSI_PIN);
        else
           GPIOPinWrite(SPI_MOSI_PORT,  SPI_MOSI_PIN, 0x00);

        MAP_UtilsDelay(DELAY_CLK_1_US);
        GPIOPinWrite(SPI_CLK_PORT,  SPI_CLK_PIN, SPI_CLK_PIN);
        MAP_UtilsDelay(DELAY_CLK_1_US);

        l_data = l_data << 1;
    }

}

In project I use lcd in text mode but mostly in graphic mode

I am printing: system init screens, weather icons, and weather forecast emoticons.

Bitmaps are designed in freeware software: micro LCD (in attachment)

( Firstly I wrote my own bmp converter, is somebody want I can share it )

Lcd usage procedures are witten in C:

void LcdInit()
{
    GPIOPinWrite(PWR_PORT, PWR_PIN, PWR_PIN);         // power on
    GPIOPinWrite(SCE_PORT, SCE_PIN, 0x00);            // sce
    GPIOPinWrite(RES_PORT, RES_PIN, 0x00);            // reset on


   // Delay to keep printing speed reasonable. About 100 milliseconds.
    MAP_UtilsDelay(800000);


    GPIOPinWrite(RES_PORT, RES_PIN, RES_PIN);            // reset off
    GPIOPinWrite(SCE_PORT, SCE_PIN, SCE_PIN);            // sce

    LcdWriteCommand( 0x21 );                    // LCD Extended Commands.
    LcdWriteCommand( 0xC8 );                    // Set LCD Vop (Contrast).
    LcdWriteCommand( 0x06 );                    // Set Temp coefficent.
    LcdWriteCommand( 0x13 );                    // LCD bias mode 1:48.
    LcdWriteCommand( 0x20 );                    // LCD Standard Commands, Horizontal addressing mode.
    LcdWriteCommand( 0x08 );                    // LCD blank
    LcdWriteCommand( 0x0C );                    // LCD in normal mode.
}

Full code is available in attachment

In one with my previous posts I share LCD usage video,

Here is a link ( soon now I have problem with add a links )

best regards

Lukasz, Poland