PRACTICA # 4 LCD GRAFICA 96x64 (SPI)

OBJETIVO:
           Se creará el driver para la lcd grafica 96x64 con interfaz de comunicación RSPI. Se mostrará un mensaje de 7 líneas.

•  Crear y configurar la unidad RSPI0
•  Inicializar los pines de LCD-CS y LCD-RS
•  Incluimos todos los archivos de la librería grafica en una carpeta

DESARROLLO:

• Del manual Renesas RX62N RDK User's Manual ubicamos los pines del LCD:  

•  Del YRDKRX62N schematic ubicamos el LCD okaya:
  

PASOS:

•  Creación de un proyecto:

1.- Abrir el software e2studio
2.- New/ C Project / Renesas RXC ToolChain

3.- Seleccionar el target R5F562N8, debug hardware Segger jLink, después next

4.- Seleccionar C/C++ Source file y por ultimo Finish.

5.- Configuraremos el SPI por medio del módulo RSPI0 a 3 Mhz en el archivo r_cg_serial_SPI.c:

void R_RSPI0_Create(void)

{

            MSTP(RSPI0) = 0; //Enable SPI0

            //PORT C DDR

            PORTC.DDR.BIT.B5 = 1; //An output pin    RSPCK output

            PORTC.DDR.BIT.B6 = 1; //An output pin    MOSI output

            PORTC.DDR.BIT.B7 = 0; //An input pin     MISO = input

            PORTC.ICR.BIT.B7 = 1;

            // inicializa pines

            PORTC.DDR.BIT.B2 = 1; // como salida LCD-CS

            PORT5.DDR.BIT.B1 = 1; // como salida LCD-RS

            PORTC.DDR.BIT.B3 = 1; // como salida

            PORTC.DR.BIT.B3 = 0; // Pull RSTOUT# inverting buffer low so RSTOUT# goes high, releasing reset state.

            //PFGSPI register

            IOPORT.PFGSPI.BIT.RSPIS = 0; //PC as the SPI-A

            IOPORT.PFGSPI.BIT.RSPCKE = 1; //RSPCKA pin is enable

            IOPORT.PFGSPI.BIT.MOSIE = 1; //MOSIA pin is enable

            IOPORT.PFGSPI.BIT.MISOE = 1; //MISOA pin is enable

            IOPORT.PFGSPI.BIT.SSL0E = 0; //SSL0A pin is disable

            IOPORT.PFGSPI.BIT.SSL1E = 0; //SSL1A pin is disable

            IOPORT.PFGSPI.BIT.SSL2E = 0; //SSL2A pin is disable

            IOPORT.PFGSPI.BIT.SSL3E = 0; //SSL3A pin is disable

            //SPPCR register

            RSPI0.SPPCR.BIT.SPLP = 0; //Disable loopback mode

            RSPI0.SPPCR.BIT.SPLP2 = 0; //Disable loopback mode

            RSPI0.SPPCR.BIT.SPOM = 0; //CMOS output

            RSPI0.SPPCR.BIT.MOIFV = 0; //MOSI idle fixed value equal 0

            RSPI0.SPPCR.BIT.MOIFE = 0; //MOSI output value equal final data from previous transfer

            //SPBR register

            //Determine base frequency of operation

            //With 0 and BRDV can this options of frequency:

            //BRDV = 0 => 24MHz

            //BRDV = 1 => 12MHz

            //BRDV = 2 => 6MHz

            //BRDV = 3 => 3MHz

            RSPI0.SPBR = 0x0;   //BRDV = 3 => 3MHz

            //SPDCR register

            RSPI0.SPDCR.BIT.SPFC = 0; //Number of frames

            RSPI0.SPDCR.BIT.SLSEL = 0; //SSL0 to SSL3 as output

            RSPI0.SPDCR.BIT.SPRDTD = 0; //SPDR values are read from the receive buffer

            RSPI0.SPDCR.BIT.SPLW = 0; //SPDR is accessed in words

            //SPCKD register

            RSPI0.SPCKD.BIT.SCKDL = 0; //1 RSPCK delay for clock

            //SSLND register

            RSPI0.SSLND.BIT.SLNDL = 0; //1 RSPCK delay for slave select negation

            //SPND register

            RSPI0.SPND.BIT.SPNDL = 0; //1 RSPCK + 2 PCLK delay for next-access

            //SPCR2 register

            RSPI0.SPCR2.BIT.SPPE = 0; //Parity disable

            RSPI0.SPCR2.BIT.SPOE = 0; //Parity mode

            RSPI0.SPCR2.BIT.SPIIE = 0; //Disable idle interrupt

            RSPI0.SPCR2.BIT.PTE = 0; //Disable the self-diagnostics of the parity circuit

            //SPCMOD0 register (Graphic display)

            RSPI0.SPCMD0.BIT.CPHA = 0; //Data sampling on odd edge, data variation on even edge

            RSPI0.SPCMD0.BIT.CPOL = 0; //RSPCK = 0 when idle

            RSPI0.SPCMD0.BIT.BRDV = 0; //Bit Rate = 3MHz (according with SPBR register)

            RSPI0.SPCMD0.BIT.SSLA = 0; //SSL3-A for graphic display

            RSPI0.SPCMD0.BIT.SSLKP = 0; //Negative all SSL signals upon completion of transfer

            RSPI0.SPCMD0.BIT.SPB = 7; //Data length = 8bits

            RSPI0.SPCMD0.BIT.LSBF = 0; //MSB first

            RSPI0.SPCMD0.BIT.SPNDEN = 0; //Disable next-access delay

            RSPI0.SPCMD0.BIT.SLNDEN = 0; //Disable SSL negation delay

            RSPI0.SPCMD0.BIT.SCKDEN = 0; //An RSPCK delay of 1 RSPCK

            //SPCR register

            RSPI0.SPCR.BIT.SPMS = 1; //SPI operation (four-wire)

            RSPI0.SPCR.BIT.TXMD = 0; //Full-duplex operation

            RSPI0.SPCR.BIT.MODFEN = 0; //Disable detection of mode fault error

            RSPI0.SPCR.BIT.MSTR = 1; //Master mode

            RSPI0.SPCR.BIT.SPEIE = 0; //Disable error interrupt requests

            RSPI0.SPCR.BIT.SPTIE = 1; //enable transmit interrupt requests

            RSPI0.SPCR.BIT.SPRIE = 1; //enable receive interrupt requests

            RSPI0.SPCR.BIT.SPE = 1; //Enable RSPI function

            //SSLP register

            RSPI0.SSLP.BIT.SSLP0 = 1; //SSL0 signal is 1 active

            RSPI0.SSLP.BIT.SSLP1 = 1; //SSL1 signal is 1 active

            RSPI0.SSLP.BIT.SSLP2 = 1; //SSL2 signal is 1 active

            RSPI0.SSLP.BIT.SSLP3 = 1; //SSL3 signal is 1 active

            //SPSCR register

            RSPI0.SPSCR.BIT.SPSLN = 0; //RSPI sequence

}

6.- Inicializamos la LCD con la función en main.c

void SR_LCD_GRAPH(void)

{

            LCDInit();

            LCDClear();

            //LCDTest2();

            LCDFont(FONT_LARGE);

}

7.- La función de envió se muestra a continuación y está en el archivo r_cg_serial_SPI.c:

MD_STATUS R_RSPI0_Send_Receive(uint8_t *  tx_buf, uint16_t tx_num, uint8_t *  rx_buf)

{

    MD_STATUS status = MD_OK;

            RSPI0.SPDR.WORD.H =  0x00ff & *tx_buf;

            //Wait for transfer complete

            while (RSPI0.SPSR.BIT.IDLNF)

            {

                        __nop();

            }

            (void) RSPI0.SPDR.WORD.H ;

            G_SPI_SendingData = 0;

    return (status);

}

8.- El API de usuario RDKRX62N_spi, YRDKRX62N_LCD y el driver ST7579_LCD, glyph_api se encuentran en la carpeta Glyph:

•  Agregar código, compilar y debug:

1.- Bajar el código de:

--> Practica #4

2.- Compilar con el icono del martillo y debug con el icono del insecto:

DEMOSTRACIÓN: