Initial STLcd code.
- Basic screen initialization and clear is working - Currently SPI is set to a low speed for easy logic analyzer debugging
This commit is contained in:
Jacob Alexander
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7 changed files with 554 additions and 3 deletions
336
Scan/STLcd/lcd_scan.c
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336
Scan/STLcd/lcd_scan.c
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/* Copyright (C) 2015 by Jacob Alexander
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*
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* This file is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file. If not, see <http://www.gnu.org/licenses/>.
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*/
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// ----- Includes -----
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// Compiler Includes
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#include <Lib/ScanLib.h>
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// Project Includes
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#include <cli.h>
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#include <led.h>
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#include <print.h>
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// Local Includes
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#include "lcd_scan.h"
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// ----- Defines -----
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#define LCD_TOTAL_VISIBLE_PAGES 4
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#define LCD_PAGE_LEN 132
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// ----- Macros -----
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// Number of entries in the SPI0 TxFIFO
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#define SPI0_TxFIFO_CNT ( ( SPI0_SR & SPI_SR_TXCTR ) >> 12 )
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// ----- Structs -----
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// ----- Function Declarations -----
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// CLI Functions
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void cliFunc_lcdCmd( char* args );
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void cliFunc_lcdInit( char* args );
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void cliFunc_lcdTest( char* args );
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// ----- Variables -----
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// Full Toggle State
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uint8_t cliFullToggleState = 0;
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// Normal/Reverse Toggle State
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uint8_t cliNormalReverseToggleState = 0;
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// Scan Module command dictionary
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CLIDict_Entry( lcdCmd, "Send byte via SPI, second argument enables a0. Defaults to control." );
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CLIDict_Entry( lcdInit, "Re-initialize the LCD display." );
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CLIDict_Entry( lcdTest, "Test out the LCD display." );
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CLIDict_Def( lcdCLIDict, "ST LCD Module Commands" ) = {
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CLIDict_Item( lcdCmd ),
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CLIDict_Item( lcdInit ),
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CLIDict_Item( lcdTest ),
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{ 0, 0, 0 } // Null entry for dictionary end
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};
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// ----- Interrupt Functions -----
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// ----- Functions -----
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inline void SPI_setup()
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{
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// Enable SPI internal clock
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SIM_SCGC6 |= SIM_SCGC6_SPI0;
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// Setup MOSI (SOUT) and SCLK (SCK)
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PORTC_PCR6 = PORT_PCR_DSE | PORT_PCR_MUX(2);
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PORTC_PCR5 = PORT_PCR_DSE | PORT_PCR_MUX(2);
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// Setup SS (PCS)
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PORTC_PCR4 = PORT_PCR_DSE | PORT_PCR_MUX(2);
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// Master Mode, CS0
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SPI0_MCR = SPI_MCR_MSTR | SPI_MCR_PCSIS(1);
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// DSPI Clock and Transfer Attributes
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// Frame Size: 8 bits
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// MSB First
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// CLK Low by default
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SPI0_CTAR0 = SPI_CTAR_FMSZ(7)
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| SPI_CTAR_ASC(7)
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| SPI_CTAR_DT(7)
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| SPI_CTAR_CSSCK(7)
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| SPI_CTAR_PBR(0) | SPI_CTAR_BR(7);
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}
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// Write buffer to SPI FIFO
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void SPI_write( uint8_t *buffer, uint8_t len )
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{
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for ( uint8_t byte = 0; byte < len; byte++ )
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{
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// Wait for SPI TxFIFO to have 4 or fewer entries
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while ( !( SPI0_SR & SPI_SR_TFFF ) )
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delayMicroseconds(10);
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// Write byte to TxFIFO
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// CS0, CTAR0
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SPI0_PUSHR = ( buffer[ byte ] & 0xff ) | SPI_PUSHR_PCS(1);
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// Indicate transfer has completed
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while ( !( SPI0_SR & SPI_SR_TCF ) );
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SPI0_SR |= SPI_SR_TCF;
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}
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}
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// Write to a control register
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void LCD_writeControlReg( uint8_t byte )
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{
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// Wait for TxFIFO to be empt
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while ( SPI0_TxFIFO_CNT != 0 );
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// Set A0 low to enter control register mode
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GPIOC_PCOR |= (1<<7);
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// Write byte to SPI FIFO
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SPI_write( &byte, 1 );
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// Wait for TxFIFO to be empty
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while ( SPI0_TxFIFO_CNT != 0 );
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// Make sure data has transferred
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delayMicroseconds(10); // XXX Adjust if SPI speed changes
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// Set A0 high to go back to display register mode
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GPIOC_PSOR |= (1<<7);
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}
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// Write to display register
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// Pages 0-7 normal display
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// Page 8 icon buffer
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void LCD_writeDisplayReg( uint8_t page, uint8_t *buffer, uint8_t len )
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{
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// Set the register page
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LCD_writeControlReg( 0xB0 | ( 0x0F & page ) );
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// Write buffer to SPI
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SPI_write( buffer, len );
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}
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inline void LCD_clearPage( uint8_t page )
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{
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// Set the register page
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LCD_writeControlReg( 0xB0 | ( 0x0F & page ) );
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// Set display start line
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LCD_writeControlReg( 0x40 );
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// Reset Column Address
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LCD_writeControlReg( 0x10 );
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LCD_writeControlReg( 0x00 );
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for ( uint8_t page_reg = 0; page_reg < LCD_PAGE_LEN; page_reg++ )
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{
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uint8_t byte = 0;
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// Write buffer to SPI
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SPI_write( &byte, 1 );
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}
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// Wait for TxFIFO to be empty
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while ( SPI0_TxFIFO_CNT != 0 );
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}
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// Clear Display
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void LCD_clear()
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{
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// Setup each page
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for ( uint8_t page = 0; page < LCD_TOTAL_VISIBLE_PAGES; page++ )
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{
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LCD_clearPage( page );
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}
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// Reset Page, Start Line, and Column Address
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// Page
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LCD_writeControlReg( 0xB0 );
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// Start Line
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LCD_writeControlReg( 0x40 );
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// Reset Column Address
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LCD_writeControlReg( 0x10 );
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LCD_writeControlReg( 0x00 );
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}
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// Intialize display
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void LCD_initialize()
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{
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// ADC Select (Normal)
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LCD_writeControlReg( 0xA0 );
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// LCD Off
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LCD_writeControlReg( 0xAE );
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// COM Scan Output Direction
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LCD_writeControlReg( 0xC0 );
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// LCD Bias (1/6 bias)
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LCD_writeControlReg( 0xA2 );
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// Power Supply Operating Mode (Internal Only)
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LCD_writeControlReg( 0x2F );
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// Internal Rb/Ra Ratio
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LCD_writeControlReg( 0x26 );
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// Reset
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LCD_writeControlReg( 0xE2 );
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// Electric volume mode set, and value
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LCD_writeControlReg( 0x81 );
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LCD_writeControlReg( 0x00 );
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// LCD On
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LCD_writeControlReg( 0xAF );
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// Clear Display RAM
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LCD_clear();
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}
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// Setup
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inline void LCD_setup()
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{
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// Register Scan CLI dictionary
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CLI_registerDictionary( lcdCLIDict, lcdCLIDictName );
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// Initialize SPI
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SPI_setup();
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// Setup Register Control Signal (A0)
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// Start in display register mode (1)
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GPIOC_PDDR |= (1<<7);
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PORTC_PCR7 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
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GPIOC_PSOR |= (1<<7);
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// Setup LCD Reset pin (RST)
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// 0 - Reset, 1 - Normal Operation
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// Start in normal mode (1)
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GPIOC_PDDR |= (1<<8);
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PORTC_PCR8 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
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GPIOC_PSOR |= (1<<8);
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// Run LCD intialization sequence
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LCD_initialize();
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}
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// LCD State processing loop
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inline uint8_t LCD_scan()
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{
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// NOP - Screen Refresh
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//LCD_writeControlReg( 0xE3 );
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return 0;
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}
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// ----- CLI Command Functions -----
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void cliFunc_lcdInit( char* args )
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{
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print( NL ); // No \r\n by default after the command is entered
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LCD_initialize();
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}
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void cliFunc_lcdTest( char* args )
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{
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print( NL ); // No \r\n by default after the command is entered
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//LCD_initialize();
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// Test pattern
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uint8_t pattern[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
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//uint8_t pattern[] = { 0xFF, 0x00, 0x96, 0xFF, 0x00, 0xFF, 0x00 };
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// Write to page D0
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LCD_writeDisplayReg( 0, pattern, sizeof( pattern ) );
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}
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void cliFunc_lcdCmd( char* args )
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{
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char* curArgs;
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char* arg1Ptr;
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char* arg2Ptr = args;
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print( NL ); // No \r\n by default after the command is entered
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curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
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CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
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// No args
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if ( *arg1Ptr == '\0' )
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return;
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// SPI Command
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uint8_t cmd = (uint8_t)numToInt( arg1Ptr );
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curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
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CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
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// Single Arg
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if ( *arg1Ptr == '\0' )
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goto cmd;
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// TODO Deal with a0
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cmd:
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info_msg("Sending - ");
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printHex( cmd );
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print( NL );
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LCD_writeControlReg( cmd );
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}
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34
Scan/STLcd/lcd_scan.h
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34
Scan/STLcd/lcd_scan.h
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@ -0,0 +1,34 @@
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/* Copyright (C) 2015 by Jacob Alexander
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*
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* This file is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LCD_SCAN_H
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#define __LCD_SCAN_H
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// ----- Includes -----
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// Compiler Includes
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#include <stdint.h>
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// ----- Functions -----
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void LCD_setup();
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uint8_t LCD_scan();
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#endif // __LCD_SCAN_H
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31
Scan/STLcd/setup.cmake
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31
Scan/STLcd/setup.cmake
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@ -0,0 +1,31 @@
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###| CMake Kiibohd Controller Scan Module |###
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#
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# Written by Jacob Alexander in 2014-2015 for the Kiibohd Controller
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#
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# Released into the Public Domain
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#
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###
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###
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# Sub-module flag, cannot be included stand-alone
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#
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set ( SubModule 1 )
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###
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# Module C files
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#
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set( Module_SRCS
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lcd_scan.c
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)
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###
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# Compiler Family Compatibility
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#
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set( ModuleCompatibility
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arm
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)
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