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@@ -38,11 +38,11 @@ |
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typedef struct I2C_Buffer { |
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volatile uint16_t head; |
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volatile uint16_t tail; |
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volatile uint8_t sequencePos; |
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volatile uint16_t size; |
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volatile uint8_t *buffer; |
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uint16_t head; |
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uint16_t tail; |
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uint8_t sequencePos; |
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uint16_t size; |
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uint8_t *buffer; |
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} I2C_Buffer; |
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// ----- Function Declarations ----- |
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@@ -56,6 +56,7 @@ void cliFunc_ledZero( char* args ); |
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uint8_t I2C_TxBufferPop(); |
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void I2C_BufferPush( uint8_t byte, I2C_Buffer *buffer ); |
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uint16_t I2C_BufferLen( I2C_Buffer *buffer ); |
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uint8_t I2C_Send( uint8_t *data, uint8_t sendLen, uint8_t recvLen ); |
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@@ -63,8 +64,8 @@ uint16_t I2C_BufferLen( I2C_Buffer *buffer ); |
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// Scan Module command dictionary |
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CLIDict_Entry( echo, "Example command, echos the arguments." ); |
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CLIDict_Entry( i2cRecv, "Send I2C sequence of bytes and expect a reply of 1 byte." ); |
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CLIDict_Entry( i2cSend, "Send I2C sequence of bytes." ); |
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CLIDict_Entry( i2cRecv, "Send I2C sequence of bytes and expect a reply of 1 byte on the last sequence. Use |'s to split sequences with a stop." ); |
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CLIDict_Entry( i2cSend, "Send I2C sequence of bytes. Use |'s to split sequences with a stop." ); |
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CLIDict_Entry( ledZero, "Zero out LED register pages (non-configuration)." ); |
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CLIDict_Def( scanCLIDict, "Scan Module Commands" ) = { |
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@@ -87,8 +88,8 @@ uint16_t Scan_scanCount = 0; |
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volatile uint8_t I2C_TxBufferPtr[ I2C_TxBufferLength ]; |
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volatile uint8_t I2C_RxBufferPtr[ I2C_TxBufferLength ]; |
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volatile I2C_Buffer I2C_TxBuffer = { 0, 0, 0, I2C_TxBufferLength, I2C_TxBufferPtr }; |
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volatile I2C_Buffer I2C_RxBuffer = { 0, 0, 0, I2C_RxBufferLength, I2C_RxBufferPtr }; |
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volatile I2C_Buffer I2C_TxBuffer = { 0, 0, 0, I2C_TxBufferLength, (uint8_t*)I2C_TxBufferPtr }; |
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volatile I2C_Buffer I2C_RxBuffer = { 0, 0, 0, I2C_RxBufferLength, (uint8_t*)I2C_RxBufferPtr }; |
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void I2C_setup() |
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{ |
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@@ -168,6 +169,7 @@ void i2c0_isr() |
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} |
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else |
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{ |
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dbug_print("Attempting to read byte"); |
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I2C0_C1 = I2C_RxBuffer.sequencePos == 1 |
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? I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TXAK // Single byte read |
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: I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST; // Multi-byte read |
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@@ -175,28 +177,25 @@ void i2c0_isr() |
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} |
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else |
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{ |
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/* |
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dbug_msg("STOP - "); |
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printHex( I2C_BufferLen( (I2C_Buffer*)&I2C_TxBuffer ) ); |
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print(NL); |
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*/ |
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// Delay around STOP to make sure it actually happens... |
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delayMicroseconds( 1 ); |
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I2C0_C1 = I2C_C1_IICEN; // Send STOP |
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delayMicroseconds( 7 ); |
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// If there is another sequence, start sending |
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if ( I2C_BufferLen( (I2C_Buffer*)&I2C_TxBuffer ) < I2C_TxBuffer.size ) |
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{ |
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// Check to see if we already have control of the bus |
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if ( I2C0_C1 & I2C_C1_MST ) |
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{ |
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// Already the master (ah yeah), send a repeated start |
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I2C0_C1 = I2C_C1_IICEN | I2C_C1_MST | I2C_C1_RSTA | I2C_C1_TX; |
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} |
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// Otherwise, seize control |
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else |
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{ |
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// Wait...till the master dies |
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while ( I2C0_S & I2C_S_BUSY ); |
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// Now we're the master (ah yisss), get ready to send stuffs |
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I2C0_C1 = I2C_C1_IICEN | I2C_C1_MST | I2C_C1_TX; |
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} |
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// Clear status flags |
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I2C0_S = I2C_S_IICIF | I2C_S_ARBL; |
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// Wait...till the master dies |
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while ( I2C0_S & I2C_S_BUSY ); |
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// Enable I2C interrupt |
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I2C0_C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_MST | I2C_C1_TX; |
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@@ -204,12 +203,6 @@ void i2c0_isr() |
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// Transmit byte |
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I2C0_D = I2C_TxBufferPop(); |
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} |
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// Issue STOP |
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else |
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{ |
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delayMicroseconds( 1 ); // Should be enough time before issuing STOP |
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I2C0_C1 = I2C_C1_IICEN; // Send STOP |
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} |
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} |
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} |
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// Master Mode Receive |
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@@ -246,10 +239,45 @@ void i2c0_isr() |
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// ----- Functions ----- |
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void LED_zeroPages( uint8_t startPage, uint8_t numPages, uint8_t pageLen ) |
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{ |
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// Page Setup |
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uint8_t pageSetup[] = { 0xE8, 0xFD, 0x00 }; |
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// Max length of a page + chip id + reg start |
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uint8_t fullPage[ 0xB3 + 2 ] = { 0 }; |
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fullPage[0] = 0xE8; // Set chip id, starting reg is already 0x00 |
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// Iterate through given pages, zero'ing out the given register regions |
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for ( uint8_t page = startPage; page < startPage + numPages; page++ ) |
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{ |
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// Set page |
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pageSetup[2] = page; |
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// Setup page |
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while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 ) |
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delay(1); |
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// Zero out page |
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while ( I2C_Send( fullPage, pageLen + 2, 0 ) == 0 ) |
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delay(1); |
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} |
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} |
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// Setup |
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inline void LED_setup() |
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{ |
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I2C_setup(); |
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// Zero out Frame Registers |
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LED_zeroPages( 0x00, 8, 0xB3 ); // LED Registers |
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LED_zeroPages( 0x0B, 1, 0x0C ); // Control Registers |
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// Disable Hardware shutdown of ISSI chip (pull high) |
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GPIOD_PDDR |= (1<<1); |
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PORTD_PCR1 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1); |
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GPIOD_PSOR |= (1<<1); |
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} |
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@@ -397,6 +425,7 @@ uint8_t I2C_TxBufferPop() |
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// Decrement buffer sequence (until next stop will be sent) |
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I2C_TxBuffer.sequencePos--; |
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/* |
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dbug_msg("Popping: "); |
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printHex( data ); |
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print(" "); |
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@@ -406,6 +435,7 @@ uint8_t I2C_TxBufferPop() |
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print(" "); |
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printHex( I2C_TxBuffer.sequencePos ); |
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print(NL); |
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*/ |
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return data; |
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} |
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@@ -459,6 +489,7 @@ uint8_t I2C_Send( uint8_t *data, uint8_t sendLen, uint8_t recvLen ) |
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// Depending on what type of transfer, the first byte is configured for R or W |
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I2C0_D = I2C_TxBufferPop(); |
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return 1; |
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} |
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@@ -467,32 +498,6 @@ uint8_t I2C_Send( uint8_t *data, uint8_t sendLen, uint8_t recvLen ) |
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} |
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void LED_zeroPages( uint8_t startPage, uint8_t numPages, uint8_t pageLen ) |
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{ |
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// Page Setup |
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uint8_t pageSetup[] = { 0xE8, 0xFD, 0x00 }; |
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// Max length of a page + chip id + reg start |
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uint8_t fullPage[ 0xB3 + 2 ] = { 0 }; |
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fullPage[0] = 0xE8; // Set chip id, starting reg is already 0x00 |
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// Iterate through given pages, zero'ing out the given register regions |
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for ( uint8_t page = startPage; page < startPage + numPages; page++ ) |
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{ |
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// Set page |
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pageSetup[2] = page; |
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// Setup page |
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while ( I2C_Send( pageSetup, sizeof( pageSetup ), 0 ) == 0 ) |
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delay(1); |
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// Zero out page |
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while ( I2C_Send( fullPage, pageLen + 2, 0 ) == 0 ) |
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delay(1); |
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} |
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} |
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// LED State processing loop |
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inline uint8_t LED_loop() |
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@@ -599,6 +604,15 @@ void cliFunc_i2cSend( char* args ) |
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if ( *arg1Ptr == '\0' ) |
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break; |
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// If | is found, end sequence and start new one |
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if ( *arg1Ptr == '|' ) |
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{ |
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print("| "); |
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I2C_Send( buffer, bufferLen, 0 ); |
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bufferLen = 0; |
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continue; |
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} |
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// Interpret the argument |
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buffer[ bufferLen++ ] = (uint8_t)numToInt( arg1Ptr ); |
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@@ -638,6 +652,15 @@ void cliFunc_i2cRecv( char* args ) |
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if ( *arg1Ptr == '\0' ) |
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break; |
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// If | is found, end sequence and start new one |
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if ( *arg1Ptr == '|' ) |
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{ |
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print("| "); |
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I2C_Send( buffer, bufferLen, 0 ); |
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bufferLen = 0; |
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continue; |
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} |
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// Interpret the argument |
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buffer[ bufferLen++ ] = (uint8_t)numToInt( arg1Ptr ); |
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