drv_lcd_interface.c

//======================================================================================================================
// Copyright(c) 2018 Microchip Technology Inc. and its subsidiaries.
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//======================================================================================================================
 
//======================================================================================================================
// @file drv_lcd_interface.c
// @brief driver for the spi-interface to access the LCD controller
//======================================================================================================================
 
#include <stdint.h>
#include "common/delay.h"
#include "config/hal.h"
 
 
// PRIVATE FUNCTION CALL PROTOTYPES
void drv_LcdInterface_SpiSend(uint8_t data);
 
 
#define LCD_CS_nSELECTED    LCD_CS_SetHigh
#define LCD_CS_SELECTED     LCD_CS_SetLow
 
#define LCD_RS_COMMAND      LCD_RS_SetLow
#define LCD_RS_DATA         LCD_RS_SetHigh
 // end of group lib-driver-layer-lcd-interface-properties-private
 
 
void drv_LcdInterface_Initialize(void)
{
    LCD_RST_SetHigh();
    LCD_CS_nSELECTED();
    LCD_SCL_SetLow();
    LCD_SDI_SetLow();
    LCD_RS_SetLow();
    
    LCD_RST_SetDigitalOutput();
    LCD_CS_SetDigitalOutput();
    LCD_SCL_SetDigitalOutput();
    LCD_SDI_SetDigitalOutput();
    LCD_RS_SetDigitalOutput();
}
 
 
void drv_LcdInterface_Reset(void)
{
    LCD_RST_SetLow();
    __delay_ms(25);
    LCD_RST_SetHigh();
}
 
 
void drv_LcdInterface_SendCmd(uint8_t cmd)
{       
   LCD_CS_SELECTED();
   LCD_RS_COMMAND();
   drv_LcdInterface_SpiSend(cmd);
}
 
 
extern void drv_LcdInterface_SendChar(const char c)
{
   LCD_CS_SELECTED();
   LCD_RS_DATA();
   drv_LcdInterface_SpiSend(c);
}
 
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PRIVATE FUNCTIONS
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
void drv_LcdInterface_SpiSend(uint8_t data)
{
    uint8_t mask;
 
    for(mask = 0x80; mask != 0; mask >>= 1)
    {
        LCD_SCL_SetLow();
        Nop();
        __delay_us(1);
        if(data & mask)
            LCD_SDI_SetHigh();
        else
            LCD_SDI_SetLow();
        LCD_SCL_SetHigh();
        Nop();
        __delay_us(1);
    }
    LCD_CS_nSELECTED();
    __delay_us(50);
}
 
 
 
// end of file