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https://github.com/Derisis13/AT-VFD.git
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96 lines
4.3 KiB
C
96 lines
4.3 KiB
C
//
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// Created by lacko on 02/03/2022.
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//
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#ifndef _PT6302_H_
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#define _PT6302_H_
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#define DISPLAY_DIGITS 12
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/* PT6302 timing constants, all in usec */
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static const uint8_t TCW = 1; //CLKB pulse width
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static const uint8_t TDOFF = 16; //Data processing time
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static const uint8_t DTCSH = 16; //time difference between tDOFF and tCSH
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static const uint8_t TPRZ = 100; //VDD rise time
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static const uint8_t TWRSTB = 1; //RSTB pulse width
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enum pins {
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RSTpin = (1 << PC2),
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CSBpin = (1 << PB0),
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CLKBpin = (1 << PB6),
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DINpin = (1 << PB7),
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};
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enum RAM_types{
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DCRAM = 0x10,
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CGRAM = 0x20,
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ADRAM = 0x30,
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};
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/* -------------------------------------------------------------
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* Initial setup for the VFD controller interface
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* Sets up the connected pins and leaves them in inactive state.
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* ------------------------------------------------------------- */
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void PT6302_startup (void);
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/* -------------------------------------------------------------------------------
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* Transmits size byte of data through the VFD controller's interface from payload
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* Handles CLKB, CSB and timing constraints
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* ------------------------------------------------------------------------------- */
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void transmit_bytes (const uint8_t *payload, uint8_t size);
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/* ---------------------------------------------------------
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* Sets GP1 and GP2 to the values given in the function call
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* Handles the entire communication
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* --------------------------------------------------------- */
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void set_ports (uint8_t gp1, uint8_t gp2);
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/* ---------------------------------------------------------------------------------------
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* Sets the number of digit_count the VFD has
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* digit_count below 9 are interpreted as 9 and digit_count above 16 are interpreted as 16
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* Handles the entire communication
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* --------------------------------------------------------------------------------------- */
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void set_digits(uint8_t digit_count);
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/* -----------------------------------------------------------
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* Sets duty cycle of controlled VFD
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* Brightness between 0 and 7 are accepted, any higher means 7
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* duty = (brightness + 8)/16 (valid between 8/16 and 15/16)
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* Handles the entire communication
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* ----------------------------------------------------------- */
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void set_duty (uint8_t brightness);
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/* ------------------------------------------------------------------------------------------
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* Set the content of the DCRAM - this will display a character from the CGROM/RAM at address
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* cd_address is an array of the CGROM/RAM addresses of characters to display
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* size is the number of characters to display (max DISPLAY_DIGITS - address)
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* if exceeded, max possible number of characters will be displayed
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* address is the starting address (4 bits, max DISPLAY_DIGITS)
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* if DISPLAY_DIGITS is exceeded, no characters will be set
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* Handles the entire communication
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* ------------------------------------------------------------------------------------------ */
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void set_DCRAM(uint8_t address, const uint8_t* cg_address, uint8_t size);
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/* -------------------------------------------------------------------------------
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* Set the content of the CGRAM - this will write custom characters into the CGRAM
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* data is an array of 5-byte arrays that contain the custom character data
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* size is the number of 5-byte arrays
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* address is the starting address (3 bits)
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* Handles the entire communication
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* ------------------------------------------------------------------------------- */
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void set_CGRAM (uint8_t address, const uint8_t *data, uint8_t size);
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/* ---------------------------------------------------------------------------------------
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* Set the content of the ADRAM - This will cause the corresponding segments to be set
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* data is an array containing sequential data of the segments (one byte for two segments)
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* elements of the array are truncated after two bits
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* size is the number of segment pairs to be changed (max DISPLAY_DIGITS pairs - address)
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* if exceeded, max possible number of segment pairs will be set
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* address is the starting address (4 bits, max DISPLAY_DIGITS)
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* if DISPLAY_DIGITS is exceeded, no segment pairs will be set
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* Handles the entire communication
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* --------------------------------------------------------------------------------------- */
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void set_ADRAM(uint8_t address, const uint8_t* data, uint8_t size);
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#endif //_PT6302_H_
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