mirror of
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241 lines
12 KiB
Markdown
241 lines
12 KiB
Markdown
# group `hd44780`
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HD44780 Character LCD Driver
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## Summary
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Members | Descriptions
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`define `[`HD44780_CMD_CLEAR_DISPLAY`](#group__hd44780_1ga317a0fa779dcbd40d04095e1c3b16447) |
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`define `[`HD44780_CMD_RETURN_HOME`](#group__hd44780_1ga64cd4e167d1a9cd65b32d5dcd7ac1bb8) |
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`define `[`HD44780_CMD_ENTRY_MODE`](#group__hd44780_1ga6a4bd39ff528e4b7c7cc556095466158) |
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`define `[`HD44780_ENTRY_MODE_INC`](#group__hd44780_1ga8def8b2eb6120f932fc5831e3fbb3377) |
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`define `[`HD44780_ENTRY_MODE_SHIFT`](#group__hd44780_1gac58c05aa3eae28e88272bfb7ee7f5c40) |
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`define `[`HD44780_CMD_DISPLAY`](#group__hd44780_1gafb9f17134eb0765671ea8f43b188ae1e) |
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`define `[`HD44780_DISPLAY_ON`](#group__hd44780_1gaefd6f75e3454ecbe00950c818e9e9420) |
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`define `[`HD44780_DISPLAY_CURSOR`](#group__hd44780_1gad125b60be30b2cd0e0bfb23f949238ec) |
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`define `[`HD44780_DISPLAY_BLINK`](#group__hd44780_1gadb288f3996fafc6537c5e413eff39df8) |
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`define `[`HD44780_CMD_MOVE`](#group__hd44780_1gac1f843079f60718d770b34b1d9e080a1) |
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`define `[`HD44780_MOVE_DISPLAY`](#group__hd44780_1ga7f5aead3ce92c0bb8eef4afb6ec03fdc) |
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`define `[`HD44780_MOVE_RIGHT`](#group__hd44780_1ga5b8911c499925d126afd681d19e16985) |
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`define `[`HD44780_CMD_FUNCTION`](#group__hd44780_1ga66e53be765239225f30b35689edcc7f1) |
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`define `[`HD44780_FUNCTION_8_BIT`](#group__hd44780_1gab4760a025661db140bd7df635bbd67e7) |
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`define `[`HD44780_FUNCTION_2_LINES`](#group__hd44780_1ga88dbd8646d5fad0456e4685239404da3) |
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`define `[`HD44780_FUNCTION_5X10_DOTS`](#group__hd44780_1ga66002af4238dd0830e3dbe7780143492) |
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`define `[`HD44780_CMD_SET_CGRAM_ADDRESS`](#group__hd44780_1ga73397fed8f690a6508fb5967a76bcd3f) |
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`define `[`HD44780_CMD_SET_DDRAM_ADDRESS`](#group__hd44780_1ga32d29769e79b9843c284f98a9bc6ad2a) |
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`define `[`HD44780_BUSY_FLAG`](#group__hd44780_1gae22e5ab2bb9069fb265a6ff8ca5d0254) |
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`public void `[`hd44780_write`](#group__hd44780_1ga3a41d7df58b5856c629f8181e93b7c00)`(uint8_t data,bool isData)` | Write a byte to the display.
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`public uint8_t `[`hd44780_read`](#group__hd44780_1ga855e31aeb778f32efbd75be995797d1b)`(bool isData)` | Read a byte from the display.
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`public bool `[`hd44780_busy`](#group__hd44780_1gadcb1634221c116247735e3312637edc1)`(void)` | Indicates whether the display is currently processing, and cannot accept instructions.
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`public void `[`hd44780_command`](#group__hd44780_1gacd6ba5f8ecc8e6776e6617312b60d28e)`(uint8_t command)` | Send a command to the display. Refer to the datasheet for the valid commands.
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`public void `[`hd44780_data`](#group__hd44780_1ga8bc010c20fd8026b0d98bce13066b049)`(uint8_t data)` | Send a byte of data to the display.
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`public void `[`hd44780_clear`](#group__hd44780_1gaa358b83b37987e488b8f47d48a896ef8)`(void)` | Clear the display.
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`public void `[`hd44780_home`](#group__hd44780_1gac59e0708629529fee41ae215abd1e954)`(void)` | Move the cursor to the home position.
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`public void `[`hd44780_on`](#group__hd44780_1ga86f7413fd10963734e7d00cc475a8aba)`(bool cursor,bool blink)` | Turn the display on, and/or set the cursor position.
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`public void `[`hd44780_off`](#group__hd44780_1gaa236bcd35da58b8d3a9c5347358d3560)`(void)` | Turn the display off.
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`public void `[`hd44780_set_cgram_address`](#group__hd44780_1gacd561522fddf2ec8833325fd10e3a924)`(uint8_t address)` | Set the CGRAM address.
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`public void `[`hd44780_set_ddram_address`](#group__hd44780_1ga8de3a1df53c6481652683d1a6df31948)`(uint8_t address)` | Set the DDRAM address.
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`public void `[`hd44780_init`](#group__hd44780_1ga16611b90107639921a68efd503949db8)`(bool cursor,bool blink)` | Initialize the display.
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`public void `[`hd44780_set_cursor`](#group__hd44780_1ga0144f1c7e1de7745862f991451efa614)`(uint8_t col,uint8_t line)` | Move the cursor to the specified position on the display.
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`public void `[`hd44780_define_char`](#group__hd44780_1gaa167a2e4398a665658597f328ea08736)`(uint8_t index,uint8_t * data)` | Define a custom character.
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`public void `[`hd44780_putc`](#group__hd44780_1gaf9578702c16938a2abbb8c6becc9915f)`(char c)` | Print a character to the display. The newline character will move the cursor to the start of the next line.
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`public void `[`hd44780_puts`](#group__hd44780_1gaefe6076f55a4619cd8279765e125e513)`(const char * s)` | Print a string of characters to the display.
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`public void `[`hd44780_define_char_P`](#group__hd44780_1ga8d31109c8c7ef295511145c490cdba7d)`(uint8_t index,const uint8_t * data)` | Define a custom character from PROGMEM.
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`public void `[`hd44780_puts_P`](#group__hd44780_1gad999de4c8c443783542aece3c5ffaefc)`(const char * s)` | Print a string of characters from PROGMEM to the display.
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## Members
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#### `define `[`HD44780_CMD_CLEAR_DISPLAY`](#group__hd44780_1ga317a0fa779dcbd40d04095e1c3b16447)
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#### `define `[`HD44780_CMD_RETURN_HOME`](#group__hd44780_1ga64cd4e167d1a9cd65b32d5dcd7ac1bb8)
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#### `define `[`HD44780_CMD_ENTRY_MODE`](#group__hd44780_1ga6a4bd39ff528e4b7c7cc556095466158)
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#### `define `[`HD44780_ENTRY_MODE_INC`](#group__hd44780_1ga8def8b2eb6120f932fc5831e3fbb3377)
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#### `define `[`HD44780_ENTRY_MODE_SHIFT`](#group__hd44780_1gac58c05aa3eae28e88272bfb7ee7f5c40)
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#### `define `[`HD44780_CMD_DISPLAY`](#group__hd44780_1gafb9f17134eb0765671ea8f43b188ae1e)
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#### `define `[`HD44780_DISPLAY_ON`](#group__hd44780_1gaefd6f75e3454ecbe00950c818e9e9420)
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#### `define `[`HD44780_DISPLAY_CURSOR`](#group__hd44780_1gad125b60be30b2cd0e0bfb23f949238ec)
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#### `define `[`HD44780_DISPLAY_BLINK`](#group__hd44780_1gadb288f3996fafc6537c5e413eff39df8)
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#### `define `[`HD44780_CMD_MOVE`](#group__hd44780_1gac1f843079f60718d770b34b1d9e080a1)
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#### `define `[`HD44780_MOVE_DISPLAY`](#group__hd44780_1ga7f5aead3ce92c0bb8eef4afb6ec03fdc)
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#### `define `[`HD44780_MOVE_RIGHT`](#group__hd44780_1ga5b8911c499925d126afd681d19e16985)
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#### `define `[`HD44780_CMD_FUNCTION`](#group__hd44780_1ga66e53be765239225f30b35689edcc7f1)
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#### `define `[`HD44780_FUNCTION_8_BIT`](#group__hd44780_1gab4760a025661db140bd7df635bbd67e7)
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#### `define `[`HD44780_FUNCTION_2_LINES`](#group__hd44780_1ga88dbd8646d5fad0456e4685239404da3)
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#### `define `[`HD44780_FUNCTION_5X10_DOTS`](#group__hd44780_1ga66002af4238dd0830e3dbe7780143492)
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#### `define `[`HD44780_CMD_SET_CGRAM_ADDRESS`](#group__hd44780_1ga73397fed8f690a6508fb5967a76bcd3f)
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#### `define `[`HD44780_CMD_SET_DDRAM_ADDRESS`](#group__hd44780_1ga32d29769e79b9843c284f98a9bc6ad2a)
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#### `define `[`HD44780_BUSY_FLAG`](#group__hd44780_1gae22e5ab2bb9069fb265a6ff8ca5d0254)
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#### `public void `[`hd44780_write`](#group__hd44780_1ga3a41d7df58b5856c629f8181e93b7c00)`(uint8_t data,bool isData)`
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Write a byte to the display.
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#### Parameters
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* `data` The byte to send to the display.
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* `isData` Whether the byte is an instruction or character data.
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#### `public uint8_t `[`hd44780_read`](#group__hd44780_1ga855e31aeb778f32efbd75be995797d1b)`(bool isData)`
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Read a byte from the display.
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#### Parameters
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* `isData` Whether to read the current cursor position, or the character at the cursor.
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#### Returns
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If `isData` is `true`, the returned byte will be the character at the current DDRAM address. Otherwise, it will be the current DDRAM address and the busy flag.
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#### `public bool `[`hd44780_busy`](#group__hd44780_1gadcb1634221c116247735e3312637edc1)`(void)`
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Indicates whether the display is currently processing, and cannot accept instructions.
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#### Returns
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`true` if the display is busy.
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#### `public void `[`hd44780_command`](#group__hd44780_1gacd6ba5f8ecc8e6776e6617312b60d28e)`(uint8_t command)`
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Send a command to the display. Refer to the datasheet for the valid commands.
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This function waits for the display to clear the busy flag before sending the command.
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#### Parameters
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* `command` The command to send.
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#### `public void `[`hd44780_data`](#group__hd44780_1ga8bc010c20fd8026b0d98bce13066b049)`(uint8_t data)`
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Send a byte of data to the display.
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This function waits for the display to clear the busy flag before sending the data.
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#### Parameters
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* `data` The byte of data to send.
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#### `public void `[`hd44780_clear`](#group__hd44780_1gaa358b83b37987e488b8f47d48a896ef8)`(void)`
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Clear the display.
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This function is called on init.
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#### `public void `[`hd44780_home`](#group__hd44780_1gac59e0708629529fee41ae215abd1e954)`(void)`
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Move the cursor to the home position.
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This function is called on init.
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#### `public void `[`hd44780_on`](#group__hd44780_1ga86f7413fd10963734e7d00cc475a8aba)`(bool cursor,bool blink)`
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Turn the display on, and/or set the cursor position.
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This function is called on init.
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#### Parameters
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* `cursor` Whether to show the cursor.
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* `blink` Whether to blink the cursor, if shown.
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#### `public void `[`hd44780_off`](#group__hd44780_1gaa236bcd35da58b8d3a9c5347358d3560)`(void)`
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Turn the display off.
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#### `public void `[`hd44780_set_cgram_address`](#group__hd44780_1gacd561522fddf2ec8833325fd10e3a924)`(uint8_t address)`
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Set the CGRAM address.
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This function is used when defining custom characters.
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#### Parameters
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* `address` The CGRAM address to move to, from `0x00` to `0x3F`.
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#### `public void `[`hd44780_set_ddram_address`](#group__hd44780_1ga8de3a1df53c6481652683d1a6df31948)`(uint8_t address)`
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Set the DDRAM address.
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This function is used when printing characters to the display, and setting the cursor.
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#### Parameters
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* `address` The DDRAM address to move to, from `0x00` to `0x7F`.
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#### `public void `[`hd44780_init`](#group__hd44780_1ga16611b90107639921a68efd503949db8)`(bool cursor,bool blink)`
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Initialize the display.
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This function should be called only once, before any of the other functions can be called.
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#### Parameters
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* `cursor` Whether to show the cursor.
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* `blink` Whether to blink the cursor, if shown.
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#### `public void `[`hd44780_set_cursor`](#group__hd44780_1ga0144f1c7e1de7745862f991451efa614)`(uint8_t col,uint8_t line)`
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Move the cursor to the specified position on the display.
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#### Parameters
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* `col` The column number to move to, from 0 to 15 on 16x2 displays.
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* `line` The line number to move to, either 0 or 1 on 16x2 displays.
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#### `public void `[`hd44780_define_char`](#group__hd44780_1gaa167a2e4398a665658597f328ea08736)`(uint8_t index,uint8_t * data)`
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Define a custom character.
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#### Parameters
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* `index` The index of the custom character to define, from 0 to 7.
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* `data` An array of 8 bytes containing the 5-bit row data of the character, where the first byte is the topmost row, and the least significant bit of each byte is the rightmost column.
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#### `public void `[`hd44780_putc`](#group__hd44780_1gaf9578702c16938a2abbb8c6becc9915f)`(char c)`
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Print a character to the display. The newline character will move the cursor to the start of the next line.
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The exact character shown may depend on the ROM code of your particular display - refer to the datasheet for the full character set.
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#### Parameters
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* `c` The character to print.
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#### `public void `[`hd44780_puts`](#group__hd44780_1gaefe6076f55a4619cd8279765e125e513)`(const char * s)`
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Print a string of characters to the display.
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#### Parameters
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* `s` The string to print.
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#### `public void `[`hd44780_define_char_P`](#group__hd44780_1ga8d31109c8c7ef295511145c490cdba7d)`(uint8_t index,const uint8_t * data)`
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Define a custom character from PROGMEM.
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On ARM devices, this function is simply an alias of [hd44780_define_char()](.build/docs/internals/undefined.md#group__hd44780_1gaa167a2e4398a665658597f328ea08736).
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#### Parameters
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* `index` The index of the custom character to define, from 0 to 7.
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* `data` A PROGMEM array of 8 bytes containing the 5-bit row data of the character, where the first byte is the topmost row, and the least significant bit of each byte is the rightmost column.
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#### `public void `[`hd44780_puts_P`](#group__hd44780_1gad999de4c8c443783542aece3c5ffaefc)`(const char * s)`
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Print a string of characters from PROGMEM to the display.
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On ARM devices, this function is simply an alias of [hd44780_puts()](.build/docs/internals/undefined.md#group__hd44780_1gaefe6076f55a4619cd8279765e125e513).
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#### Parameters
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* `s` The PROGMEM string to print.
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