--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Scan/STLcd/lcd_scan.c	Tue Apr 14 00:40:48 2015 -0700
@@ -0,0 +1,336 @@
+/* Copyright (C) 2015 by Jacob Alexander
+ *
+ * This file is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// ----- Includes -----
+
+// Compiler Includes
+#include <Lib/ScanLib.h>
+
+// Project Includes
+#include <cli.h>
+#include <led.h>
+#include <print.h>
+
+// Local Includes
+#include "lcd_scan.h"
+
+
+
+// ----- Defines -----
+
+#define LCD_TOTAL_VISIBLE_PAGES 4
+#define LCD_PAGE_LEN 132
+
+
+
+// ----- Macros -----
+
+// Number of entries in the SPI0 TxFIFO
+#define SPI0_TxFIFO_CNT ( ( SPI0_SR & SPI_SR_TXCTR ) >> 12 )
+
+
+
+// ----- Structs -----
+
+// ----- Function Declarations -----
+
+// CLI Functions
+void cliFunc_lcdCmd( char* args );
+void cliFunc_lcdInit( char* args );
+void cliFunc_lcdTest( char* args );
+
+
+
+// ----- Variables -----
+
+// Full Toggle State
+uint8_t cliFullToggleState = 0;
+
+// Normal/Reverse Toggle State
+uint8_t cliNormalReverseToggleState = 0;
+
+// Scan Module command dictionary
+CLIDict_Entry( lcdCmd,      "Send byte via SPI, second argument enables a0. Defaults to control." );
+CLIDict_Entry( lcdInit,     "Re-initialize the LCD display." );
+CLIDict_Entry( lcdTest,     "Test out the LCD display." );
+
+CLIDict_Def( lcdCLIDict, "ST LCD Module Commands" ) = {
+	CLIDict_Item( lcdCmd ),
+	CLIDict_Item( lcdInit ),
+	CLIDict_Item( lcdTest ),
+	{ 0, 0, 0 } // Null entry for dictionary end
+};
+
+
+
+// ----- Interrupt Functions -----
+
+
+
+// ----- Functions -----
+
+inline void SPI_setup()
+{
+	// Enable SPI internal clock
+	SIM_SCGC6 |= SIM_SCGC6_SPI0;
+
+	// Setup MOSI (SOUT) and SCLK (SCK)
+	PORTC_PCR6 = PORT_PCR_DSE | PORT_PCR_MUX(2);
+	PORTC_PCR5 = PORT_PCR_DSE | PORT_PCR_MUX(2);
+
+	// Setup SS (PCS)
+	PORTC_PCR4 = PORT_PCR_DSE | PORT_PCR_MUX(2);
+
+	// Master Mode, CS0
+	SPI0_MCR = SPI_MCR_MSTR | SPI_MCR_PCSIS(1);
+
+	// DSPI Clock and Transfer Attributes
+	// Frame Size: 8 bits
+	// MSB First
+	// CLK Low by default
+	SPI0_CTAR0 = SPI_CTAR_FMSZ(7)
+		| SPI_CTAR_ASC(7)
+		| SPI_CTAR_DT(7)
+		| SPI_CTAR_CSSCK(7)
+		| SPI_CTAR_PBR(0) | SPI_CTAR_BR(7);
+}
+
+// Write buffer to SPI FIFO
+void SPI_write( uint8_t *buffer, uint8_t len )
+{
+
+	for ( uint8_t byte = 0; byte < len; byte++ )
+	{
+		// Wait for SPI TxFIFO to have 4 or fewer entries
+		while ( !( SPI0_SR & SPI_SR_TFFF ) )
+			delayMicroseconds(10);
+
+		// Write byte to TxFIFO
+		// CS0, CTAR0
+		SPI0_PUSHR = ( buffer[ byte ] & 0xff ) | SPI_PUSHR_PCS(1);
+
+		// Indicate transfer has completed
+		while ( !( SPI0_SR & SPI_SR_TCF ) );
+		SPI0_SR |= SPI_SR_TCF;
+	}
+}
+
+// Write to a control register
+void LCD_writeControlReg( uint8_t byte )
+{
+	// Wait for TxFIFO to be empt
+	while ( SPI0_TxFIFO_CNT != 0 );
+
+	// Set A0 low to enter control register mode
+	GPIOC_PCOR |= (1<<7);
+
+	// Write byte to SPI FIFO
+	SPI_write( &byte, 1 );
+
+	// Wait for TxFIFO to be empty
+	while ( SPI0_TxFIFO_CNT != 0 );
+
+	// Make sure data has transferred
+	delayMicroseconds(10); // XXX Adjust if SPI speed changes
+
+	// Set A0 high to go back to display register mode
+	GPIOC_PSOR |= (1<<7);
+}
+
+// Write to display register
+// Pages 0-7 normal display
+// Page  8   icon buffer
+void LCD_writeDisplayReg( uint8_t page, uint8_t *buffer, uint8_t len )
+{
+	// Set the register page
+	LCD_writeControlReg( 0xB0 | ( 0x0F & page ) );
+
+	// Write buffer to SPI
+	SPI_write( buffer, len );
+}
+
+inline void LCD_clearPage( uint8_t page )
+{
+	// Set the register page
+	LCD_writeControlReg( 0xB0 | ( 0x0F & page ) );
+
+	// Set display start line
+	LCD_writeControlReg( 0x40 );
+
+	// Reset Column Address
+	LCD_writeControlReg( 0x10 );
+	LCD_writeControlReg( 0x00 );
+
+	for ( uint8_t page_reg = 0; page_reg < LCD_PAGE_LEN; page_reg++ )
+	{
+		uint8_t byte = 0;
+
+		// Write buffer to SPI
+		SPI_write( &byte, 1 );
+	}
+
+	// Wait for TxFIFO to be empty
+	while ( SPI0_TxFIFO_CNT != 0 );
+}
+
+// Clear Display
+void LCD_clear()
+{
+	// Setup each page
+	for ( uint8_t page = 0; page < LCD_TOTAL_VISIBLE_PAGES; page++ )
+	{
+		LCD_clearPage( page );
+	}
+
+	// Reset Page, Start Line, and Column Address
+	// Page
+	LCD_writeControlReg( 0xB0 );
+
+	// Start Line
+	LCD_writeControlReg( 0x40 );
+
+	// Reset Column Address
+	LCD_writeControlReg( 0x10 );
+	LCD_writeControlReg( 0x00 );
+}
+
+// Intialize display
+void LCD_initialize()
+{
+	// ADC Select (Normal)
+	LCD_writeControlReg( 0xA0 );
+
+	// LCD Off
+	LCD_writeControlReg( 0xAE );
+
+	// COM Scan Output Direction
+	LCD_writeControlReg( 0xC0 );
+
+	// LCD Bias (1/6 bias)
+	LCD_writeControlReg( 0xA2 );
+
+	// Power Supply Operating Mode (Internal Only)
+	LCD_writeControlReg( 0x2F );
+
+	// Internal Rb/Ra Ratio
+	LCD_writeControlReg( 0x26 );
+
+	// Reset
+	LCD_writeControlReg( 0xE2 );
+
+	// Electric volume mode set, and value
+	LCD_writeControlReg( 0x81 );
+	LCD_writeControlReg( 0x00 );
+
+	// LCD On
+	LCD_writeControlReg( 0xAF );
+
+	// Clear Display RAM
+	LCD_clear();
+}
+
+// Setup
+inline void LCD_setup()
+{
+	// Register Scan CLI dictionary
+	CLI_registerDictionary( lcdCLIDict, lcdCLIDictName );
+
+	// Initialize SPI
+	SPI_setup();
+
+
+	// Setup Register Control Signal (A0)
+	// Start in display register mode (1)
+	GPIOC_PDDR |= (1<<7);
+	PORTC_PCR7 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
+	GPIOC_PSOR |= (1<<7);
+
+	// Setup LCD Reset pin (RST)
+	// 0 - Reset, 1 - Normal Operation
+	// Start in normal mode (1)
+	GPIOC_PDDR |= (1<<8);
+	PORTC_PCR8 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
+	GPIOC_PSOR |= (1<<8);
+
+	// Run LCD intialization sequence
+	LCD_initialize();
+}
+
+
+// LCD State processing loop
+inline uint8_t LCD_scan()
+{
+	// NOP - Screen Refresh
+	//LCD_writeControlReg( 0xE3 );
+	return 0;
+}
+
+
+
+// ----- CLI Command Functions -----
+
+void cliFunc_lcdInit( char* args )
+{
+	print( NL ); // No \r\n by default after the command is entered
+	LCD_initialize();
+}
+
+void cliFunc_lcdTest( char* args )
+{
+	print( NL ); // No \r\n by default after the command is entered
+
+	//LCD_initialize();
+	// Test pattern
+	uint8_t pattern[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+	//uint8_t pattern[] = { 0xFF, 0x00, 0x96, 0xFF, 0x00, 0xFF, 0x00 };
+
+	// Write to page D0
+	LCD_writeDisplayReg( 0, pattern, sizeof( pattern ) );
+}
+
+void cliFunc_lcdCmd( char* args )
+{
+	char* curArgs;
+	char* arg1Ptr;
+	char* arg2Ptr = args;
+
+	print( NL ); // No \r\n by default after the command is entered
+
+	curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
+	CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
+
+	// No args
+	if ( *arg1Ptr == '\0' )
+		return;
+
+	// SPI Command
+	uint8_t cmd = (uint8_t)numToInt( arg1Ptr );
+
+	curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
+	CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
+
+	// Single Arg
+	if ( *arg1Ptr == '\0' )
+		goto cmd;
+
+	// TODO Deal with a0
+cmd:
+	info_msg("Sending - ");
+	printHex( cmd );
+	print( NL );
+	LCD_writeControlReg( cmd );
+}
+