Andrew Reed
Basic TFT display program for CITY082
Diff: tft_interface/cy8ckit_028_tft.cpp
- Revision:
- 1:402b32a1025f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tft_interface/cy8ckit_028_tft.cpp Tue Nov 19 10:04:48 2019 +0000
@@ -0,0 +1,398 @@
+/***************************************************************************//**
+* \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 */
+
+