cy8ckit_028_tft.cpp

00001 /***************************************************************************//**
00002 * \file DisplayInterface.h
00003 * \version 1.0
00004 *
00005 * \brief
00006 * Objective:
00007 *    This is display software i8080 interface source file
00008 *
00009 ********************************************************************************
00010 * \copyright
00011 * Copyright 2018-2019 Cypress Semiconductor Corporation
00012 * SPDX-License-Identifier: Apache-2.0
00013 *
00014 * Licensed under the Apache License, Version 2.0 (the "License");
00015 * you may not use this file except in compliance with the License.
00016 * You may obtain a copy of the License at
00017 *
00018 *     http://www.apache.org/licenses/LICENSE-2.0
00019 *
00020 * Unless required by applicable law or agreed to in writing, software
00021 * distributed under the License is distributed on an "AS IS" BASIS,
00022 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00023 * See the License for the specific language governing permissions and
00024 * limitations under the License.
00025 *******************************************************************************/
00026 
00027 
00028 #include "cy8ckit_028_tft.h"
00029 #include <mbed_wait_api.h>
00030 #include "mbed.h"
00031 
00032 DigitalInOut LCD_REG0(P9_0);
00033 DigitalInOut LCD_REG1(P9_1);
00034 DigitalInOut LCD_REG2(P9_2);
00035 DigitalInOut LCD_REG3(P9_4);
00036 DigitalInOut LCD_REG4(P9_5);
00037 DigitalInOut LCD_REG5(P0_2);
00038 DigitalInOut LCD_REG6(P13_0);
00039 DigitalInOut LCD_REG7(P13_1);
00040 
00041 DigitalOut LCD_NWR(P12_0);
00042 DigitalOut LCD_DC(P12_1);
00043 DigitalOut LCD_RESET(P12_2);
00044 DigitalOut LCD_NRD(P12_3);
00045 
00046 /*******************************************************************************
00047 * Function Name: DataWrite
00048 ****************************************************************************//**
00049 *
00050 * \brief
00051 *   Writes one byte of data to the software i8080 interface.
00052 *
00053 * \details
00054 *   This function:
00055 *       - Writes data to the data bus
00056 *       - Sends low pulse to the LCD_NWR line to write data
00057 * 
00058 * \todo
00059 *   All this should be replaced with a udb register to save all the shifting
00060 *   and individual bit writing.
00061 *
00062 *******************************************************************************/
00063 void DataWrite(U8 data)
00064 {
00065     LCD_REG0 = (data & 0x01);
00066     LCD_REG1 = ((data>>1) & 0x01);
00067     LCD_REG2 = ((data>>2) & 0x01);
00068     LCD_REG3 = ((data>>3) & 0x01);
00069     LCD_REG4 = ((data>>4) & 0x01);
00070     LCD_REG5 = ((data>>5) & 0x01);
00071     LCD_REG6 = ((data>>6) & 0x01);
00072     LCD_REG7 = ((data>>7) & 0x01);
00073     
00074     LCD_NWR = 0u;
00075     LCD_NWR = 1u;
00076 
00077 }
00078 
00079 
00080 /*******************************************************************************
00081 * Function Name: DataRead
00082 ****************************************************************************//**
00083 *
00084 * \brief
00085 *   Reads one byte of data from the software i8080 interface.
00086 *
00087 * \details
00088 *   This function:
00089 *       - Changes data bus GPIO pins drive mode to digital Hi-Z with enabled input 
00090 *         buffer
00091 *       - Sends low pulse to LCD_NRD line to read data
00092 *       - Reads data from the data bus
00093 *       - Sends low pulse to the LCD_NWR line to write data
00094 *       - Changes data bus GPIO pins drive mode back to to Strong Drive mode
00095 * 
00096 * \todo
00097 *   All this should be replaced with a udb register to save all the shifting
00098 *   and individual bit reading.
00099 *
00100 *******************************************************************************/
00101 U8 DataRead(void)
00102 {
00103     U8 data = 0u;
00104 
00105     /* enable input */
00106     LCD_REG0.input();
00107     LCD_REG1.input();
00108     LCD_REG2.input();
00109     LCD_REG3.input();
00110     LCD_REG4.input();
00111     LCD_REG5.input();
00112     LCD_REG6.input();
00113     LCD_REG7.input();
00114 
00115     LCD_NRD = 0u;  //  Pulse read line low then read the data port
00116     
00117     data = (U8)LCD_REG0.read();
00118     data |= (U8)LCD_REG1.read()<<1;
00119     data |= (U8)LCD_REG2.read()<<2;
00120     data |= (U8)LCD_REG3.read()<<3;
00121     data |= (U8)LCD_REG4.read()<<4;
00122     data |= (U8)LCD_REG5.read()<<5;
00123     data |= (U8)LCD_REG6.read()<<6;
00124     data |= (U8)LCD_REG7.read()<<7;
00125     
00126     LCD_NRD = 1u;  // Raise the read line and then go back to output port
00127        
00128     LCD_REG0.output();
00129     LCD_REG1.output();
00130     LCD_REG2.output();
00131     LCD_REG3.output();
00132     LCD_REG4.output();
00133     LCD_REG5.output();
00134     LCD_REG6.output();
00135     LCD_REG7.output();
00136 
00137     return data;
00138 }
00139 
00140 
00141 /*******************************************************************************
00142 * Function Name: DisplayIntf_Init
00143 ****************************************************************************//**
00144 *
00145 * \brief
00146 *   Initializes software i8080 interface.
00147 *
00148 * \details
00149 *   This function:
00150 *       - Initializes interface GPIO pins
00151 *
00152 *******************************************************************************/
00153 void DisplayIntf_Init(void)
00154 {
00155     /* All pins are initialized by the Device Configurator. */
00156     LCD_RESET = 1u;
00157     LCD_NRD = 1u;
00158     LCD_NWR = 1u;
00159     LCD_DC = 0u;
00160     LCD_REG0.output();
00161     LCD_REG1.output();
00162     LCD_REG2.output();
00163     LCD_REG3.output();
00164     LCD_REG4.output();
00165     LCD_REG5.output();
00166     LCD_REG6.output();
00167     LCD_REG7.output();
00168     wait_ms(20);
00169     LCD_RESET = 0u;
00170     wait_ms(100);
00171     
00172     LCD_RESET = 1u;
00173     wait_ms(100);
00174 
00175     DisplayIntf_Write8_A0(0x28);
00176     DisplayIntf_Write8_A0(0x11);    /* Exit Sleep mode */
00177     wait_ms(100);
00178     DisplayIntf_Write8_A0(0x36);
00179     DisplayIntf_Write8_A1(0xA0);    /* MADCTL: memory data access control */
00180     DisplayIntf_Write8_A0(0x3A);
00181     DisplayIntf_Write8_A1(0x65);    /* COLMOD: Interface Pixel format */
00182     DisplayIntf_Write8_A0(0xB2);
00183     DisplayIntf_Write8_A1(0x0C);
00184     DisplayIntf_Write8_A1(0x0C);
00185     DisplayIntf_Write8_A1(0x00);
00186     DisplayIntf_Write8_A1(0x33);
00187     DisplayIntf_Write8_A1(0x33);    /* PORCTRK: Porch setting */
00188     DisplayIntf_Write8_A0(0xB7);
00189     DisplayIntf_Write8_A1(0x35);    /* GCTRL: Gate Control */
00190     DisplayIntf_Write8_A0(0xBB);
00191     DisplayIntf_Write8_A1(0x2B);    /* VCOMS: VCOM setting */
00192     DisplayIntf_Write8_A0(0xC0);
00193     DisplayIntf_Write8_A1(0x2C);    /* LCMCTRL: LCM Control */
00194     DisplayIntf_Write8_A0(0xC2);
00195     DisplayIntf_Write8_A1(0x01);
00196     DisplayIntf_Write8_A1(0xFF);    /* VDVVRHEN: VDV and VRH Command Enable */
00197     DisplayIntf_Write8_A0(0xC3);
00198     DisplayIntf_Write8_A1(0x11);    /* VRHS: VRH Set */
00199     DisplayIntf_Write8_A0(0xC4);
00200     DisplayIntf_Write8_A1(0x20);    /* VDVS: VDV Set */
00201     DisplayIntf_Write8_A0(0xC6);
00202     DisplayIntf_Write8_A1(0x0F);    /* FRCTRL2: Frame Rate control in normal mode */
00203     DisplayIntf_Write8_A0(0xD0);
00204     DisplayIntf_Write8_A1(0xA4);
00205     DisplayIntf_Write8_A1(0xA1);    /* PWCTRL1: Power Control 1 */
00206     DisplayIntf_Write8_A0(0xE0);
00207     DisplayIntf_Write8_A1(0xD0);
00208     DisplayIntf_Write8_A1(0x00);
00209     DisplayIntf_Write8_A1(0x05);
00210     DisplayIntf_Write8_A1(0x0E);
00211     DisplayIntf_Write8_A1(0x15);
00212     DisplayIntf_Write8_A1(0x0D);
00213     DisplayIntf_Write8_A1(0x37);
00214     DisplayIntf_Write8_A1(0x43);
00215     DisplayIntf_Write8_A1(0x47);
00216     DisplayIntf_Write8_A1(0x09);
00217     DisplayIntf_Write8_A1(0x15);
00218     DisplayIntf_Write8_A1(0x12);
00219     DisplayIntf_Write8_A1(0x16);
00220     DisplayIntf_Write8_A1(0x19);    /* PVGAMCTRL: Positive Voltage Gamma control */
00221     DisplayIntf_Write8_A0(0xE1);
00222     DisplayIntf_Write8_A1(0xD0);
00223     DisplayIntf_Write8_A1(0x00);
00224     DisplayIntf_Write8_A1(0x05);
00225     DisplayIntf_Write8_A1(0x0D);
00226     DisplayIntf_Write8_A1(0x0C);
00227     DisplayIntf_Write8_A1(0x06);
00228     DisplayIntf_Write8_A1(0x2D);
00229     DisplayIntf_Write8_A1(0x44);
00230     DisplayIntf_Write8_A1(0x40);
00231     DisplayIntf_Write8_A1(0x0E);
00232     DisplayIntf_Write8_A1(0x1C);
00233     DisplayIntf_Write8_A1(0x18);
00234     DisplayIntf_Write8_A1(0x16);
00235     DisplayIntf_Write8_A1(0x19);    /* NVGAMCTRL: Negative Voltage Gamma control */
00236     DisplayIntf_Write8_A0(0x2B);
00237     DisplayIntf_Write8_A1(0x00);
00238     DisplayIntf_Write8_A1(0x00);
00239     DisplayIntf_Write8_A1(0x00);
00240     DisplayIntf_Write8_A1(0xEF);    /* Y address set */
00241     DisplayIntf_Write8_A0(0x2A);
00242     DisplayIntf_Write8_A1(0x00);
00243     DisplayIntf_Write8_A1(0x00);
00244     DisplayIntf_Write8_A1(0x01);
00245     DisplayIntf_Write8_A1(0x3F);    /* X address set */
00246     wait_ms(10);
00247     DisplayIntf_Write8_A0(0x29);
00248 
00249 
00250 }
00251 
00252 
00253 /*******************************************************************************
00254 * Function Name: DisplayIntf_Write8_A0
00255 ****************************************************************************//**
00256 *
00257 * \brief
00258 *   Writes one byte of data to the software i8080 interface with the LCD_DC pin 
00259 *   set to 0
00260 *
00261 * \details
00262 *   This function:
00263 *       - Sets LCD_DC pin to 0
00264 *       - Writes one data byte
00265 *
00266 *******************************************************************************/
00267 void DisplayIntf_Write8_A0(U8 data)
00268 {
00269     LCD_DC = 0u;
00270     DataWrite(data);
00271 }
00272 
00273 
00274 /*******************************************************************************
00275 * Function Name: DisplayIntf_Write8_A1
00276 ****************************************************************************//**
00277 *
00278 * \brief
00279 *   Writes one byte of data to the software i8080 interface with the LCD_DC pin 
00280 *   set to 1
00281 *
00282 * \details
00283 *   This function:
00284 *       - Sets LCD_DC pin to 1
00285 *       - Writes one data byte
00286 *
00287 *******************************************************************************/
00288 void DisplayIntf_Write8_A1(U8 data)
00289 {
00290     LCD_DC = 1u;
00291     DataWrite(data);
00292 }
00293 
00294 
00295 /*******************************************************************************
00296 * Function Name: DisplayIntf_WriteM8_A1
00297 ****************************************************************************//**
00298 *
00299 * \brief
00300 *   Writes multiple bytes of data to the software i8080 interface with the LCD_DC 
00301 *   pin set to 1
00302 *
00303 * \details
00304 *   This function:
00305 *       - Sets LCD_DC pin to 1
00306 *       - Writes data bytes
00307 *
00308 *******************************************************************************/
00309 void DisplayIntf_WriteM8_A1(U8 data[], int num)
00310 {
00311     int i = 0;
00312 
00313     LCD_DC = 1u;
00314 
00315     for(i = 0; i < num; i++)
00316     {
00317         DataWrite(data[i]);
00318     }
00319 }
00320 
00321 
00322 /*******************************************************************************
00323 * Function Name: DisplayIntf_Read8_A1
00324 ****************************************************************************//**
00325 *
00326 * \brief
00327 *   Reads one byte of data from the software i8080 interface with the LCD_DC pin 
00328 *   set to 1
00329 *
00330 * \details
00331 *   This function:
00332 *       - Sets LCD_DC pin to 1
00333 *       - Reads one data byte
00334 *
00335 *******************************************************************************/
00336 U8 DisplayIntf_Read8_A1(void)
00337 {
00338     LCD_DC = 1u;
00339     return DataRead();
00340 }
00341 
00342 
00343 /*******************************************************************************
00344 * Function Name: DisplayIntf_ReadM8_A1
00345 ****************************************************************************//**
00346 *
00347 * \brief
00348 *   Reads multiple bytes of data from the software i8080 interface with the LCD_DC 
00349 *   pin set to 1
00350 *
00351 * \details
00352 *   This function:
00353 *       - Sets LCD_DC pin to 1
00354 *       - Reads data bytes
00355 *
00356 *******************************************************************************/
00357 void DisplayIntf_ReadM8_A1(U8 data[], int num)
00358 {
00359     int i = 0;
00360 
00361     LCD_DC = 1u;
00362 
00363     for(i = 0; i < num; i++)
00364     {
00365         data[i] = DataRead();
00366     }
00367 }
00368 
00369 
00370 /* [] END OF FILE */
00371 
00372