K64-SSD1963(LCD controller) Interface.

akshaybhatewara — Sat, 12 Jan 2019 10:45:38 GMT

I am trying to interface K64 with SSD1963(LCD Controller) using 16-bit parallel(8080-mode) Flexbus at 48Mhz.

Data lines and Chip Select line of flexbus are working fine but other control lines(Data/Command,Write) are not working properly.

Please help me to configure the flexbus for SSD1963.

Please find attached image of waveform for reference.

Init function of Flexbus

void Init_FLEXBUS_LCD_port_GPIO(void) //Init flexbus interface
{

SIM_SCGC5 = (0 | SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK| SIM_SCGC5_PORTD_MASK | SIM_SCGC5_PORTE_MASK) ; //Enable clock PORTA,PORTB,PORTC,PORTD & PORTE for LCD interfacing

/* Configure the pins needed to FlexBus Function (Alt 5) */
PORTB_PCR18=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //DB15
PORTC_PCR0=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //DB14
PORTC_PCR1=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //DB13
PORTC_PCR2=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //DB12
PORTC_PCR3=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //PORT_PCR_MUX(1)->PORT_PCR_MUX(5)//LCD_BLE

PORTC_PCR15=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //LCD_23
PORTD_PCR1=(0|PORT_PCR_MUX(5)|PORT_PCR_DSE_MASK); //LCD_CS

SIM_SOPT2 |= SIM_SOPT2_FBSL(3); // Security access off
SIM_SCGC7 |= SIM_SCGC7_FLEXBUS_MASK; // Flexbus clock enable

FB_CSAR0 = FLEX_DC_ADDRESS; //CS0 Base address

FB_CSMR0 = FLEX_ADRESS_MASK | FB_CSMR_V_MASK;

FB_CSCR0 = FB_CSCR_PS(2) // 16-bit port
                      | FB_CSCR_AA_MASK // auto-acknowledge
                      | FB_CSCR_ASET(0x2) // assert chip select on second clock edge after address is asserted
                   // | FB_CSCR_WS(0x1) // 1 wait state - may need a wait state depending on the bus speed

| FB_CSCR_BLS_MASK // RMB Byte lane shift enable

;

}

#define FLEX_DC_ADDRESS 0x60000000
#define FLEX_ADRESS_MASK 0x00010000//0x00010000
#define FLEX_DATA_ADDRESS 0x60010000

Write Data function

void Write_Data_16BIT(unsigned long data1)
{
unsigned short Data_BUS=0;//,Temp=0;

if(LCD_FLEX_BUS_MODE)
{
*(unsigned short*)(FLEX_DATA_ADDRESS) = data1; //write
}

}

Write Command function

void Write_Command(unsigned char command)
{

if(LCD_FLEX_BUS_MODE)
{
*(unsigned short*)(FLEX_DC_ADDRESS) = command;
}

}