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Template for working forward
tft_interface/cy8ckit_028_tft.cpp
- Committer:
- reedas
- Date:
- 2019-11-19
- Revision:
- 1:402b32a1025f
File content as of revision 1:402b32a1025f:
/***************************************************************************//** * \file DisplayInterface.h * \version 1.0 * * \brief * Objective: * This is display software i8080 interface source file * ******************************************************************************** * \copyright * Copyright 2018-2019 Cypress Semiconductor Corporation * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ #include "cy8ckit_028_tft.h" #include <mbed_wait_api.h> #include "mbed.h" #include "PortInOut.h" DigitalInOut LCD_REG0(P9_0); DigitalInOut LCD_REG1(P9_1); DigitalInOut LCD_REG2(P9_2); DigitalInOut LCD_REG3(P9_4); DigitalInOut LCD_REG4(P9_5); DigitalInOut LCD_REG5(P0_2); DigitalInOut LCD_REG6(P13_0); DigitalInOut LCD_REG7(P13_1); PortInOut P0(Port0, 0x04); PortInOut P9(Port9, 0x37); PortInOut P13(Port13, 0x03); DigitalOut LCD_NWR(P12_0); DigitalOut LCD_DC(P12_1); DigitalOut LCD_RESET(P12_2); DigitalOut LCD_NRD(P12_3); /******************************************************************************* * Function Name: DataWrite ****************************************************************************/ /** * * \brief * Writes one byte of data to the software i8080 interface. * * \details * This function: * - Writes data to the data bus * - Sends low pulse to the LCD_NWR line to write data * * Changed from individual bit banging to port masked writes to * P9[5,4,2,1,0], P13[1,0], P0[2] to optimise slightly * * \todo * All this should be replaced with a udb register to save all the shifting * and individual bit writing. * *******************************************************************************/ void DataWrite(U8 data) { // LCD_REG0 = (data & 0x01); // LCD_REG1 = ((data>>1) & 0x01); // LCD_REG2 = ((data>>2) & 0x01); // LCD_REG3 = ((data>>3) & 0x01); // LCD_REG4 = ((data>>4) & 0x01); /* read the appropriate port and only change the bits we need to then write the * affected bits back to the port retaining any unaffected bit values */ int pbyte = P9.read(); int bit012 = (data & 0x07); int bit34 = (data & 0x18) << 1; pbyte = (pbyte & 0xc8) | bit34 | bit012; P9.write(pbyte); // LCD_REG5 = ((data>>5) & 0x01); pbyte = P0.read(); int bit5 = (data & 0x20) >> 3 ; pbyte = (pbyte & 0xfb) | bit5 ; P0.write(pbyte); // LCD_REG6 = ((data>>6) & 0x01); // LCD_REG7 = ((data>>7) & 0x01); pbyte = P13.read(); int bit67 = (data & 0xc0) >> 6 ; pbyte = (pbyte & 0xfc) | bit67 ; P13.write(pbyte); LCD_NWR = 0u; LCD_NWR = 1u; } /******************************************************************************* * Function Name: DataRead ****************************************************************************//** * * \brief * Reads one byte of data from the software i8080 interface. * * \details * This function: * - Changes data bus GPIO pins drive mode to digital Hi-Z with enabled input * buffer * - Sends low pulse to LCD_NRD line to read data * - Reads data from the data bus * - Sends low pulse to the LCD_NWR line to write data * - Changes data bus GPIO pins drive mode back to to Strong Drive mode * * \todo * All this should be replaced with a udb register to save all the shifting * and individual bit reading. * *******************************************************************************/ U8 DataRead(void) { U8 data = 0u; /* enable input */ LCD_REG0.input(); LCD_REG1.input(); LCD_REG2.input(); LCD_REG3.input(); LCD_REG4.input(); LCD_REG5.input(); LCD_REG6.input(); LCD_REG7.input(); LCD_NRD = 0u; // Pulse read line low then read the data port data = (U8)LCD_REG0.read(); data |= (U8)LCD_REG1.read()<<1; data |= (U8)LCD_REG2.read()<<2; data |= (U8)LCD_REG3.read()<<3; data |= (U8)LCD_REG4.read()<<4; data |= (U8)LCD_REG5.read()<<5; data |= (U8)LCD_REG6.read()<<6; data |= (U8)LCD_REG7.read()<<7; LCD_NRD = 1u; // Raise the read line and then go back to output port LCD_REG0.output(); LCD_REG1.output(); LCD_REG2.output(); LCD_REG3.output(); LCD_REG4.output(); LCD_REG5.output(); LCD_REG6.output(); LCD_REG7.output(); return data; } /******************************************************************************* * Function Name: DisplayIntf_Init ****************************************************************************//** * * \brief * Initializes software i8080 interface. * * \details * This function: * - Initializes interface GPIO pins * *******************************************************************************/ void DisplayIntf_Init(void) { /* All pins are initialized by the Device Configurator. */ LCD_RESET = 1u; LCD_NRD = 1u; LCD_NWR = 1u; LCD_DC = 0u; LCD_REG0.output(); LCD_REG1.output(); LCD_REG2.output(); LCD_REG3.output(); LCD_REG4.output(); LCD_REG5.output(); LCD_REG6.output(); LCD_REG7.output(); wait_ms(20); LCD_RESET = 0u; wait_ms(100); LCD_RESET = 1u; wait_ms(100); DisplayIntf_Write8_A0(0x28); DisplayIntf_Write8_A0(0x11); /* Exit Sleep mode */ wait_ms(100); DisplayIntf_Write8_A0(0x36); DisplayIntf_Write8_A1(0xA0); /* MADCTL: memory data access control */ DisplayIntf_Write8_A0(0x3A); DisplayIntf_Write8_A1(0x65); /* COLMOD: Interface Pixel format */ DisplayIntf_Write8_A0(0xB2); DisplayIntf_Write8_A1(0x0C); DisplayIntf_Write8_A1(0x0C); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x33); DisplayIntf_Write8_A1(0x33); /* PORCTRK: Porch setting */ DisplayIntf_Write8_A0(0xB7); DisplayIntf_Write8_A1(0x35); /* GCTRL: Gate Control */ DisplayIntf_Write8_A0(0xBB); DisplayIntf_Write8_A1(0x2B); /* VCOMS: VCOM setting */ DisplayIntf_Write8_A0(0xC0); DisplayIntf_Write8_A1(0x2C); /* LCMCTRL: LCM Control */ DisplayIntf_Write8_A0(0xC2); DisplayIntf_Write8_A1(0x01); DisplayIntf_Write8_A1(0xFF); /* VDVVRHEN: VDV and VRH Command Enable */ DisplayIntf_Write8_A0(0xC3); DisplayIntf_Write8_A1(0x11); /* VRHS: VRH Set */ DisplayIntf_Write8_A0(0xC4); DisplayIntf_Write8_A1(0x20); /* VDVS: VDV Set */ DisplayIntf_Write8_A0(0xC6); DisplayIntf_Write8_A1(0x0F); /* FRCTRL2: Frame Rate control in normal mode */ DisplayIntf_Write8_A0(0xD0); DisplayIntf_Write8_A1(0xA4); DisplayIntf_Write8_A1(0xA1); /* PWCTRL1: Power Control 1 */ DisplayIntf_Write8_A0(0xE0); DisplayIntf_Write8_A1(0xD0); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x05); DisplayIntf_Write8_A1(0x0E); DisplayIntf_Write8_A1(0x15); DisplayIntf_Write8_A1(0x0D); DisplayIntf_Write8_A1(0x37); DisplayIntf_Write8_A1(0x43); DisplayIntf_Write8_A1(0x47); DisplayIntf_Write8_A1(0x09); DisplayIntf_Write8_A1(0x15); DisplayIntf_Write8_A1(0x12); DisplayIntf_Write8_A1(0x16); DisplayIntf_Write8_A1(0x19); /* PVGAMCTRL: Positive Voltage Gamma control */ DisplayIntf_Write8_A0(0xE1); DisplayIntf_Write8_A1(0xD0); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x05); DisplayIntf_Write8_A1(0x0D); DisplayIntf_Write8_A1(0x0C); DisplayIntf_Write8_A1(0x06); DisplayIntf_Write8_A1(0x2D); DisplayIntf_Write8_A1(0x44); DisplayIntf_Write8_A1(0x40); DisplayIntf_Write8_A1(0x0E); DisplayIntf_Write8_A1(0x1C); DisplayIntf_Write8_A1(0x18); DisplayIntf_Write8_A1(0x16); DisplayIntf_Write8_A1(0x19); /* NVGAMCTRL: Negative Voltage Gamma control */ DisplayIntf_Write8_A0(0x2B); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0xEF); /* Y address set */ DisplayIntf_Write8_A0(0x2A); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x00); DisplayIntf_Write8_A1(0x01); DisplayIntf_Write8_A1(0x3F); /* X address set */ wait_ms(10); DisplayIntf_Write8_A0(0x29); } /******************************************************************************* * Function Name: DisplayIntf_Write8_A0 ****************************************************************************//** * * \brief * Writes one byte of data to the software i8080 interface with the LCD_DC pin * set to 0 * * \details * This function: * - Sets LCD_DC pin to 0 * - Writes one data byte * *******************************************************************************/ void DisplayIntf_Write8_A0(U8 data) { LCD_DC = 0u; DataWrite(data); } /******************************************************************************* * Function Name: DisplayIntf_Write8_A1 ****************************************************************************//** * * \brief * Writes one byte of data to the software i8080 interface with the LCD_DC pin * set to 1 * * \details * This function: * - Sets LCD_DC pin to 1 * - Writes one data byte * *******************************************************************************/ void DisplayIntf_Write8_A1(U8 data) { LCD_DC = 1u; DataWrite(data); } /******************************************************************************* * Function Name: DisplayIntf_WriteM8_A1 ****************************************************************************//** * * \brief * Writes multiple bytes of data to the software i8080 interface with the LCD_DC * pin set to 1 * * \details * This function: * - Sets LCD_DC pin to 1 * - Writes data bytes * *******************************************************************************/ void DisplayIntf_WriteM8_A1(U8 data[], int num) { int i = 0; LCD_DC = 1u; for(i = 0; i < num; i++) { DataWrite(data[i]); } } /******************************************************************************* * Function Name: DisplayIntf_Read8_A1 ****************************************************************************//** * * \brief * Reads one byte of data from the software i8080 interface with the LCD_DC pin * set to 1 * * \details * This function: * - Sets LCD_DC pin to 1 * - Reads one data byte * *******************************************************************************/ U8 DisplayIntf_Read8_A1(void) { LCD_DC = 1u; return DataRead(); } /******************************************************************************* * Function Name: DisplayIntf_ReadM8_A1 ****************************************************************************//** * * \brief * Reads multiple bytes of data from the software i8080 interface with the LCD_DC * pin set to 1 * * \details * This function: * - Sets LCD_DC pin to 1 * - Reads data bytes * *******************************************************************************/ void DisplayIntf_ReadM8_A1(U8 data[], int num) { int i = 0; LCD_DC = 1u; for(i = 0; i < num; i++) { data[i] = DataRead(); } } /* [] END OF FILE */