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- /* Copyright (C) 2014-2015 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>
- #include <led_conf.h> // Located with scan_loop.c
-
- // Local Includes
- #include "led_scan.h"
-
-
-
- // ----- Defines -----
-
- #define I2C_TxBufferLength 300
- #define I2C_RxBufferLength 8
-
- #define LED_BufferLength 144
-
-
- // ----- Structs -----
-
- typedef struct I2C_Buffer {
- uint16_t head;
- uint16_t tail;
- uint8_t sequencePos;
- uint16_t size;
- uint8_t *buffer;
- } I2C_Buffer;
-
- typedef struct LED_Buffer {
- uint8_t buffer[LED_BufferLength];
- } LED_Buffer;
-
-
-
- // ----- Function Declarations -----
-
- // CLI Functions
- void cliFunc_i2cRecv( char* args );
- void cliFunc_i2cSend( char* args );
- void cliFunc_ledPage( char* args );
- void cliFunc_ledStart( char* args );
- void cliFunc_ledTest( char* args );
- void cliFunc_ledZero( char* args );
-
- uint8_t I2C_TxBufferPop();
- void I2C_BufferPush( uint8_t byte, I2C_Buffer *buffer );
- uint16_t I2C_BufferLen( I2C_Buffer *buffer );
- uint8_t I2C_Send( uint8_t *data, uint8_t sendLen, uint8_t recvLen );
-
-
-
- // ----- Variables -----
-
- // Scan Module command dictionary
- CLIDict_Entry( i2cRecv, "Send I2C sequence of bytes and expect a reply of 1 byte on the last sequence." NL "\t\tUse |'s to split sequences with a stop." );
- CLIDict_Entry( i2cSend, "Send I2C sequence of bytes. Use |'s to split sequences with a stop." );
- CLIDict_Entry( ledPage, "Read the given register page." );
- CLIDict_Entry( ledStart, "Disable software shutdown." );
- CLIDict_Entry( ledTest, "Test out the led pages." );
- CLIDict_Entry( ledZero, "Zero out LED register pages (non-configuration)." );
-
- CLIDict_Def( ledCLIDict, "ISSI LED Module Commands" ) = {
- CLIDict_Item( i2cRecv ),
- CLIDict_Item( i2cSend ),
- CLIDict_Item( ledPage ),
- CLIDict_Item( ledStart ),
- CLIDict_Item( ledTest ),
- CLIDict_Item( ledZero ),
- { 0, 0, 0 } // Null entry for dictionary end
- };
-
-
-
- // Before sending the sequence, I2C_TxBuffer_CurLen is assigned and as each byte is sent, it is decremented
- // Once I2C_TxBuffer_CurLen reaches zero, a STOP on the I2C bus is sent
- volatile uint8_t I2C_TxBufferPtr[ I2C_TxBufferLength ];
- volatile uint8_t I2C_RxBufferPtr[ I2C_TxBufferLength ];
-
- volatile I2C_Buffer I2C_TxBuffer = { 0, 0, 0, I2C_TxBufferLength, (uint8_t*)I2C_TxBufferPtr };
- volatile I2C_Buffer I2C_RxBuffer = { 0, 0, 0, I2C_RxBufferLength, (uint8_t*)I2C_RxBufferPtr };
-
- LED_Buffer LED_pageBuffer;
-
- /*
- // A bit mask determining which LEDs are enabled in the ISSI chip
- // All channel mask example
- // 0x00 -> 0x11
- const uint8_t LED_ledEnableMask[] = {
- 0xE8, // I2C address
- 0x00, // Starting register address
- 0xFF, 0xFF, // C1-1 -> C1-16
- 0xFF, 0xFF, // C2-1 -> C2-16
- 0xFF, 0xFF, // C3-1 -> C3-16
- 0xFF, 0xFF, // C4-1 -> C4-16
- 0xFF, 0xFF, // C5-1 -> C5-16
- 0xFF, 0xFF, // C6-1 -> C6-16
- 0xFF, 0xFF, // C7-1 -> C7-16
- 0xFF, 0xFF, // C8-1 -> C8-16
- 0xFF, 0xFF, // C9-1 -> C9-16
- };
- */
-
- /*
- // A bit mask determining which LEDs are enabled in the ISSI chip
- // Infinity ErgoDox full mask
- // 0x00 -> 0x11
- const uint8_t LED_ledEnableMask[] = {
- 0xE8, // I2C address
- 0x00, // Starting register address
- 0xFC, 0xFC, // C1-1 -> C1-16
- 0xFB, 0xFB, // C2-1 -> C2-16
- 0xFF, 0xFF, // C3-1 -> C3-16
- 0xFE, 0xFE, // C4-1 -> C4-16
- 0x7F, 0x7F, // C5-1 -> C5-16
- 0xFF, 0xFF, // C6-1 -> C6-16
- 0xCF, 0xCF, // C7-1 -> C7-16
- 0xC7, 0xC7, // C8-1 -> C8-16
- 0x43, 0x43, // C9-1 -> C9-16
- };
- */
-
- /*
- const uint8_t LED_ledEnableMask[] = {
- 0xE8, // I2C address
- 0x00, // Starting register address
- 0x00, 0x00, // C1-1 -> C1-16
- //0xEC, 0xEC, // C1-1 -> C1-16
- 0x00, 0x00, // C2-1 -> C2-16
- 0x00, 0x00, // C3-1 -> C3-16
- 0x00, 0x00, // C4-1 -> C4-16
- 0x00, 0x00, // C5-1 -> C5-16
- 0x00, 0x00, // C6-1 -> C6-16
- 0x08, 0x08, // C7-1 -> C7-16
- 0x00, 0x00, // C8-1 -> C8-16
- 0x00, 0x00, // C9-1 -> C9-16
- };
- */
-
-
- /*
- // XXX Pre-fill example of buffers
- const uint8_t examplePage[] = {
- 0xE8, // I2C address
- 0x24, // Starting register address
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C1-1 -> C1-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C2-1 -> C2-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C3-1 -> C3-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C4-1 -> C4-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C5-1 -> C5-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C6-1 -> C6-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C7-1 -> C7-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C8-1 -> C8-16
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // C9-1 -> C9-16
- };
- */
-
- // XXX Pre-fill example of buffers
- const uint8_t examplePage[] = {
- 0xE8, // I2C address
- 0x24, // Starting register address
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, // C1-1 -> C1-16
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, // C2-1 -> C2-16
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, // C3-1 -> C3-16
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, // C4-1 -> C4-16
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, // C5-1 -> C5-16
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, // C6-1 -> C6-16
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, // C7-1 -> C7-16
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F, // C8-1 -> C8-16
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F, // C9-1 -> C9-16
- };
-
-
-
- // ----- Interrupt Functions -----
-
- void i2c0_isr()
- {
- cli(); // Disable Interrupts
-
- uint8_t status = I2C0_S; // Read I2C Bus status
-
- // Master Mode Transmit
- if ( I2C0_C1 & I2C_C1_TX )
- {
- // Check current use of the I2C bus
- // Currently sending data
- if ( I2C_TxBuffer.sequencePos > 0 )
- {
- // Make sure slave sent an ACK
- if ( status & I2C_S_RXAK )
- {
- // NACK Detected, disable interrupt
- erro_print("I2C NAK detected...");
- I2C0_C1 = I2C_C1_IICEN;
-
- // Abort Tx Buffer
- I2C_TxBuffer.head = 0;
- I2C_TxBuffer.tail = 0;
- I2C_TxBuffer.sequencePos = 0;
- }
- else
- {
- // Transmit byte
- I2C0_D = I2C_TxBufferPop();
- }
- }
- // Receiving data
- else if ( I2C_RxBuffer.sequencePos > 0 )
- {
- // Master Receive, addr sent
- if ( status & I2C_S_ARBL )
- {
- // Arbitration Lost
- erro_print("Arbitration lost...");
- // TODO Abort Rx
-
- I2C0_C1 = I2C_C1_IICEN;
- I2C0_S = I2C_S_ARBL | I2C_S_IICIF; // Clear ARBL flag and interrupt
- }
- if ( status & I2C_S_RXAK )
- {
- // Slave Address NACK Detected, disable interrupt
- erro_print("Slave Address I2C NAK detected...");
- // TODO Abort Rx
-
- I2C0_C1 = I2C_C1_IICEN;
- }
- else
- {
- dbug_print("Attempting to read byte");
- I2C0_C1 = I2C_RxBuffer.sequencePos == 1
- ? I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TXAK // Single byte read
- : I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST; // Multi-byte read
- }
- }
- else
- {
- /*
- dbug_msg("STOP - ");
- printHex( I2C_BufferLen( (I2C_Buffer*)&I2C_TxBuffer ) );
- print(NL);
- */
-
- // Delay around STOP to make sure it actually happens...
- delayMicroseconds( 1 );
- I2C0_C1 = I2C_C1_IICEN; // Send STOP
- delayMicroseconds( 7 );
-
- // If there is another sequence, start sending
- if ( I2C_BufferLen( (I2C_Buffer*)&I2C_TxBuffer ) < I2C_TxBuffer.size )
- {
- // Clear status flags
- I2C0_S = I2C_S_IICIF | I2C_S_ARBL;
-
- // Wait...till the master dies
- while ( I2C0_S & I2C_S_BUSY );
-
- // Enable I2C interrupt
- I2C0_C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TX;
-
- // Transmit byte
- I2C0_D = I2C_TxBufferPop();
- }
- }
- }
- // Master Mode Receive
- else
- {
- // XXX Do we need to handle 2nd last byte?
- //I2C0_C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TXAK; // No STOP, Rx, NAK on recv
-
- // Last byte
- if ( I2C_TxBuffer.sequencePos <= 1 )
- {
- // Change to Tx mode
- I2C0_C1 = I2C_C1_IICEN | I2C_C1_MST | I2C_C1_TX;
-
- // Grab last byte
- I2C_BufferPush( I2C0_D, (I2C_Buffer*)&I2C_RxBuffer );
-
- delayMicroseconds( 1 ); // Should be enough time before issuing the stop
- I2C0_C1 = I2C_C1_IICEN; // Send STOP
- }
- else
- {
- // Retrieve data
- I2C_BufferPush( I2C0_D, (I2C_Buffer*)&I2C_RxBuffer );
- }
- }
-
- I2C0_S = I2C_S_IICIF; // Clear interrupt
-
- sei(); // Re-enable Interrupts
- }
-
-
-
- // ----- Functions -----
-
- inline void I2C_setup()
- {
- // Enable I2C internal clock
- SIM_SCGC4 |= SIM_SCGC4_I2C0; // Bus 0
-
- // External pull-up resistor
- PORTB_PCR0 = PORT_PCR_ODE | PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(2);
- PORTB_PCR1 = PORT_PCR_ODE | PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(2);
-
- // SCL Frequency Divider
- // 400kHz -> 120 (0x85) @ 48 MHz F_BUS
- I2C0_F = 0x85;
- I2C0_FLT = 4;
- I2C0_C1 = I2C_C1_IICEN;
- I2C0_C2 = I2C_C2_HDRS; // High drive select
-
- // Enable I2C Interrupt
- NVIC_ENABLE_IRQ( IRQ_I2C0 );
- }
-
- void LED_zeroPages( uint8_t startPage, uint8_t numPages, uint8_t startReg, uint8_t endReg )
- {
- // Page Setup
- uint8_t pageSetup[] = { 0xE8, 0xFD, 0x00 };
-
- // Max length of a page + chip id + reg start
- uint8_t fullPage[ 0xB4 + 2 ] = { 0 }; // Max size of page
- fullPage[0] = 0xE8; // Set chip id
- fullPage[1] = startReg; // Set start reg
-
- // Iterate through given pages, zero'ing out the given register regions
- for ( uint8_t page = startPage; page < startPage + numPages; page++ )
- {
- // Set page
- pageSetup[2] = page;
-
- // Setup page
- while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 )
- delay(1);
-
- // Zero out page
- while ( I2C_Send( fullPage, endReg - startReg + 2, 0 ) == 0 )
- delay(1);
- }
- }
-
- void LED_sendPage( uint8_t *buffer, uint8_t len, uint8_t page )
- {
- // Page Setup
- uint8_t pageSetup[] = { 0xE8, 0xFD, page };
-
- // Setup page
- while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 )
- delay(1);
-
- // Write page to I2C Tx Buffer
- while ( I2C_Send( buffer, len, 0 ) == 0 )
- delay(1);
-
- }
-
- void LED_readPage( uint8_t len, uint8_t page )
- {
- // Page Setup
- uint8_t pageSetup[] = { 0xE8, 0xFD, page };
-
- // Setup page
- while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 )
- delay(1);
-
- // Register Setup
- uint8_t regSetup[] = { 0xE8, 0x00 };
-
- // Setup starting register
- while ( I2C_Send( regSetup, sizeof( regSetup ), 0 ) == 0 )
- delay(1);
-
- // Register Read Command
- uint8_t regReadCmd[] = { 0xE9 };
-
- // Read each register in the page
- for ( uint8_t reg = 0; reg < len; reg++ )
- {
- // Request register data
- while ( I2C_Send( regReadCmd, sizeof( regReadCmd ), 0 ) == 0 )
- delay(1);
- }
- }
-
- void LED_writeReg( uint8_t reg, uint8_t val, uint8_t page )
- {
- // Page Setup
- uint8_t pageSetup[] = { 0xE8, 0xFD, page };
-
- // Reg Write Setup
- uint8_t writeData[] = { 0xE8, reg, val };
-
- // Setup page
- while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 )
- delay(1);
-
- while ( I2C_Send( writeData, sizeof( writeData ), 0 ) == 0 )
- delay(1);
- }
-
- // Setup
- inline void LED_setup()
- {
- // Register Scan CLI dictionary
- CLI_registerDictionary( ledCLIDict, ledCLIDictName );
-
- // Initialize I2C
- I2C_setup();
-
- // Zero out Frame Registers
- // This needs to be done before disabling the hardware shutdown (or the leds will do undefined things)
- LED_zeroPages( 0x0B, 1, 0x00, 0x0C ); // Control Registers
-
- // Disable Hardware shutdown of ISSI chip (pull high)
- GPIOB_PDDR |= (1<<16);
- PORTB_PCR16 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
- GPIOB_PSOR |= (1<<16);
-
- // Clear LED Pages
- LED_zeroPages( 0x00, 8, 0x00, 0xB4 ); // LED Registers
-
- // Enable LEDs based upon mask
- LED_sendPage( (uint8_t*)LED_ledEnableMask, sizeof( LED_ledEnableMask ), 0 );
-
- // Disable Software shutdown of ISSI chip
- LED_writeReg( 0x0A, 0x01, 0x0B );
- }
-
-
- inline uint8_t I2C_BufferCopy( uint8_t *data, uint8_t sendLen, uint8_t recvLen, I2C_Buffer *buffer )
- {
- uint8_t reTurn = 0;
-
- // If sendLen is greater than buffer fail right away
- if ( sendLen > buffer->size )
- return 0;
-
- // Calculate new tail to determine if buffer has enough space
- // The first element specifies the expected number of bytes from the slave (+1)
- // The second element in the new buffer is the length of the buffer sequence (+1)
- uint16_t newTail = buffer->tail + sendLen + 2;
- if ( newTail >= buffer->size )
- newTail -= buffer->size;
-
- if ( I2C_BufferLen( buffer ) < sendLen + 2 )
- return 0;
-
- /*
- print("|");
- printHex( sendLen + 2 );
- print("|");
- printHex( *tail );
- print("@");
- printHex( newTail );
- print("@");
- */
-
- // If buffer is clean, return 1, otherwise 2
- reTurn = buffer->head == buffer->tail ? 1 : 2;
-
- // Add to buffer, already know there is enough room (simplifies adding logic)
- uint8_t bufferHeaderPos = 0;
- for ( uint16_t c = 0; c < sendLen; c++ )
- {
- // Add data to buffer
- switch ( bufferHeaderPos )
- {
- case 0:
- buffer->buffer[ buffer->tail ] = recvLen;
- bufferHeaderPos++;
- c--;
- break;
-
- case 1:
- buffer->buffer[ buffer->tail ] = sendLen;
- bufferHeaderPos++;
- c--;
- break;
-
- default:
- buffer->buffer[ buffer->tail ] = data[ c ];
- break;
- }
-
- // Check for wrap-around case
- if ( buffer->tail + 1 >= buffer->size )
- {
- buffer->tail = 0;
- }
- // Normal case
- else
- {
- buffer->tail++;
- }
- }
-
- return reTurn;
- }
-
-
- inline uint16_t I2C_BufferLen( I2C_Buffer *buffer )
- {
- // Tail >= Head
- if ( buffer->tail >= buffer->head )
- return buffer->head + buffer->size - buffer->tail;
-
- // Head > Tail
- return buffer->head - buffer->tail;
- }
-
-
- void I2C_BufferPush( uint8_t byte, I2C_Buffer *buffer )
- {
- dbug_msg("DATA: ");
- printHex( byte );
-
- // Make sure buffer isn't full
- if ( buffer->tail + 1 == buffer->head || ( buffer->head > buffer->tail && buffer->tail + 1 - buffer->size == buffer->head ) )
- {
- warn_msg("I2C_BufferPush failed, buffer full: ");
- printHex( byte );
- print( NL );
- return;
- }
-
- // Check for wrap-around case
- if ( buffer->tail + 1 >= buffer->size )
- {
- buffer->tail = 0;
- }
- // Normal case
- else
- {
- buffer->tail++;
- }
-
- // Add byte to buffer
- buffer->buffer[ buffer->tail ] = byte;
- }
-
-
- uint8_t I2C_TxBufferPop()
- {
- // Return 0xFF if no buffer left (do not rely on this)
- if ( I2C_BufferLen( (I2C_Buffer*)&I2C_TxBuffer ) >= I2C_TxBuffer.size )
- {
- erro_msg("No buffer to pop an entry from... ");
- printHex( I2C_TxBuffer.head );
- print(" ");
- printHex( I2C_TxBuffer.tail );
- print(" ");
- printHex( I2C_TxBuffer.sequencePos );
- print(NL);
- return 0xFF;
- }
-
- // If there is currently no sequence being sent, the first entry in the RingBuffer is the length
- if ( I2C_TxBuffer.sequencePos == 0 )
- {
- I2C_TxBuffer.sequencePos = 0xFF; // So this doesn't become an infinite loop
- I2C_RxBuffer.sequencePos = I2C_TxBufferPop();
- I2C_TxBuffer.sequencePos = I2C_TxBufferPop();
- }
-
- uint8_t data = I2C_TxBuffer.buffer[ I2C_TxBuffer.head ];
-
- // Prune head
- I2C_TxBuffer.head++;
-
- // Wrap-around case
- if ( I2C_TxBuffer.head >= I2C_TxBuffer.size )
- I2C_TxBuffer.head = 0;
-
- // Decrement buffer sequence (until next stop will be sent)
- I2C_TxBuffer.sequencePos--;
-
- /*
- dbug_msg("Popping: ");
- printHex( data );
- print(" ");
- printHex( I2C_TxBuffer.head );
- print(" ");
- printHex( I2C_TxBuffer.tail );
- print(" ");
- printHex( I2C_TxBuffer.sequencePos );
- print(NL);
- */
- return data;
- }
-
-
- uint8_t I2C_Send( uint8_t *data, uint8_t sendLen, uint8_t recvLen )
- {
- // Check head and tail pointers
- // If full, return 0
- // If empty, start up I2C Master Tx
- // If buffer is non-empty and non-full, just append to the buffer
- switch ( I2C_BufferCopy( data, sendLen, recvLen, (I2C_Buffer*)&I2C_TxBuffer ) )
- {
- // Not enough buffer space...
- case 0:
- /*
- erro_msg("Not enough Tx buffer space... ");
- printHex( I2C_TxBuffer.head );
- print(":");
- printHex( I2C_TxBuffer.tail );
- print("+");
- printHex( sendLen );
- print("|");
- printHex( I2C_TxBuffer.size );
- print( NL );
- */
- return 0;
-
- // Empty buffer, initialize I2C
- case 1:
- // Clear status flags
- I2C0_S = I2C_S_IICIF | I2C_S_ARBL;
-
- // Check to see if we already have control of the bus
- if ( I2C0_C1 & I2C_C1_MST )
- {
- // Already the master (ah yeah), send a repeated start
- I2C0_C1 = I2C_C1_IICEN | I2C_C1_MST | I2C_C1_RSTA | I2C_C1_TX;
- }
- // Otherwise, seize control
- else
- {
- // Wait...till the master dies
- while ( I2C0_S & I2C_S_BUSY );
-
- // Now we're the master (ah yisss), get ready to send stuffs
- I2C0_C1 = I2C_C1_IICEN | I2C_C1_MST | I2C_C1_TX;
- }
-
- // Enable I2C interrupt
- I2C0_C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TX;
-
- // Depending on what type of transfer, the first byte is configured for R or W
- I2C0_D = I2C_TxBufferPop();
-
- return 1;
- }
-
- // Dirty buffer, I2C already initialized
- return 2;
- }
-
-
-
- // LED State processing loop
- inline uint8_t LED_scan()
- {
-
- // I2C Busy
- // S & I2C_S_BUSY
- //I2C_S_BUSY
-
- return 0;
- }
-
-
-
- // ----- CLI Command Functions -----
-
- void cliFunc_i2cSend( char* args )
- {
- char* curArgs;
- char* arg1Ptr;
- char* arg2Ptr = args;
-
- // Buffer used after interpretting the args, will be sent to I2C functions
- // NOTE: Limited to 8 bytes currently (can be increased if necessary
- #define i2cSend_BuffLenMax 8
- uint8_t buffer[ i2cSend_BuffLenMax ];
- uint8_t bufferLen = 0;
-
- // No \r\n by default after the command is entered
- print( NL );
- info_msg("Sending: ");
-
- // Parse args until a \0 is found
- while ( bufferLen < i2cSend_BuffLenMax )
- {
- curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
- CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
-
- // Stop processing args if no more are found
- if ( *arg1Ptr == '\0' )
- break;
-
- // If | is found, end sequence and start new one
- if ( *arg1Ptr == '|' )
- {
- print("| ");
- I2C_Send( buffer, bufferLen, 0 );
- bufferLen = 0;
- continue;
- }
-
- // Interpret the argument
- buffer[ bufferLen++ ] = (uint8_t)numToInt( arg1Ptr );
-
- // Print out the arg
- dPrint( arg1Ptr );
- print(" ");
- }
-
- print( NL );
-
- I2C_Send( buffer, bufferLen, 0 );
- }
-
- void cliFunc_i2cRecv( char* args )
- {
- char* curArgs;
- char* arg1Ptr;
- char* arg2Ptr = args;
-
- // Buffer used after interpretting the args, will be sent to I2C functions
- // NOTE: Limited to 8 bytes currently (can be increased if necessary
- #define i2cSend_BuffLenMax 8
- uint8_t buffer[ i2cSend_BuffLenMax ];
- uint8_t bufferLen = 0;
-
- // No \r\n by default after the command is entered
- print( NL );
- info_msg("Sending: ");
-
- // Parse args until a \0 is found
- while ( bufferLen < i2cSend_BuffLenMax )
- {
- curArgs = arg2Ptr; // Use the previous 2nd arg pointer to separate the next arg from the list
- CLI_argumentIsolation( curArgs, &arg1Ptr, &arg2Ptr );
-
- // Stop processing args if no more are found
- if ( *arg1Ptr == '\0' )
- break;
-
- // If | is found, end sequence and start new one
- if ( *arg1Ptr == '|' )
- {
- print("| ");
- I2C_Send( buffer, bufferLen, 0 );
- bufferLen = 0;
- continue;
- }
-
- // Interpret the argument
- buffer[ bufferLen++ ] = (uint8_t)numToInt( arg1Ptr );
-
- // Print out the arg
- dPrint( arg1Ptr );
- print(" ");
- }
-
- print( NL );
-
- I2C_Send( buffer, bufferLen, 1 ); // Only 1 byte is ever read at a time with the ISSI chip
- }
-
- void cliFunc_ledPage( char* args )
- {
- // Parse number from argument
- // NOTE: Only first argument is used
- char* arg1Ptr;
- char* arg2Ptr;
- CLI_argumentIsolation( args, &arg1Ptr, &arg2Ptr );
-
- // Default to 0 if no argument is given
- uint8_t page = 0;
-
- if ( arg1Ptr[0] != '\0' )
- {
- page = (uint8_t)numToInt( arg1Ptr );
- }
-
- // No \r\n by default after the command is entered
- print( NL );
-
- LED_readPage( 0xB4, page );
- }
-
- void cliFunc_ledStart( char* args )
- {
- print( NL ); // No \r\n by default after the command is entered
- LED_zeroPages( 0x0B, 1, 0x00, 0x0C ); // Control Registers
- //LED_zeroPages( 0x00, 8, 0x00, 0xB4 ); // LED Registers
- LED_writeReg( 0x0A, 0x01, 0x0B );
- LED_sendPage( (uint8_t*)LED_ledEnableMask, sizeof( LED_ledEnableMask ), 0 );
-
- }
-
- void cliFunc_ledTest( char* args )
- {
- print( NL ); // No \r\n by default after the command is entered
- LED_sendPage( (uint8_t*)examplePage, sizeof( examplePage ), 0 );
- }
-
- void cliFunc_ledZero( char* args )
- {
- print( NL ); // No \r\n by default after the command is entered
- LED_zeroPages( 0x00, 8, 0x24, 0xB4 ); // Only PWMs
- }
-
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