Ajout drivers LCD(hd44780)

Include/lcd.h

@@ -0,0 +1,96 @@
+/*
+ * lcd.h
+ *
+ *  Created on: 10/06/2018
+ *      Author: Olivier Van den Eede
+ */
+
+#ifndef LCD_H_
+#define LCD_H_
+
+#include "stm32f4xx_hal.h"
+#include "string.h"
+#include "main.h"
+
+// #define LCD20xN 		// For 20xN LCDs
+#define LCD16xN			// For 16xN LCDs
+
+// For row start addresses
+extern const uint8_t ROW_16[];
+extern const uint8_t ROW_20[];
+
+/************************************** Command register **************************************/
+#define CLEAR_DISPLAY 0x01
+
+#define RETURN_HOME 0x02
+
+#define ENTRY_MODE_SET 0x04
+#define OPT_S	0x01					// Shift entire display to right
+#define OPT_INC 0x02					// Cursor increment
+
+#define DISPLAY_ON_OFF_CONTROL 0x08
+#define OPT_D	0x04					// Turn on display
+#define OPT_C	0x02					// Turn on cursor
+#define OPT_B 	0x01					// Turn on cursor blink
+
+#define CURSOR_DISPLAY_SHIFT 0x10		// Move and shift cursor
+#define OPT_SC 0x08
+#define OPT_RL 0x04
+
+#define FUNCTION_SET 0x20
+#define OPT_DL 0x10						// Set interface data length
+#define OPT_N 0x08						// Set number of display lines
+#define OPT_F 0x04						// Set alternate font
+
+#define SET_DDRAM_ADDR 0x80				// Set DDRAM address
+
+
+/************************************** Helper macros **************************************/
+#define DELAY(X) HAL_Delay(X)
+
+
+/************************************** LCD defines **************************************/
+#define LCD_NIB 4
+#define LCD_BYTE 8
+#define LCD_DATA_REG 1
+#define LCD_COMMAND_REG 0
+
+
+/************************************** LCD typedefs **************************************/
+#define Lcd_PortType GPIO_TypeDef*
+#define Lcd_PinType uint16_t
+
+typedef enum {
+	LCD_4_BIT_MODE,
+	LCD_8_BIT_MODE
+} Lcd_ModeTypeDef;
+
+
+typedef struct {
+	Lcd_PortType * data_port;
+	Lcd_PinType * data_pin;
+
+	Lcd_PortType rs_port;
+	Lcd_PinType rs_pin;
+
+	Lcd_PortType en_port;
+	Lcd_PinType en_pin;
+
+	Lcd_ModeTypeDef mode;
+
+} Lcd_HandleTypeDef;
+
+
+/************************************** Public functions **************************************/
+void Lcd_init(Lcd_HandleTypeDef * lcd);
+void Lcd_int(Lcd_HandleTypeDef * lcd, int number);
+void Lcd_string(Lcd_HandleTypeDef * lcd, char * string);
+void Lcd_cursor(Lcd_HandleTypeDef * lcd, uint8_t row, uint8_t col);
+Lcd_HandleTypeDef Lcd_create(
+		Lcd_PortType port[], Lcd_PinType pin[],
+		Lcd_PortType rs_port, Lcd_PinType rs_pin,
+		Lcd_PortType en_port, Lcd_PinType en_pin, Lcd_ModeTypeDef mode);
+
+
+
+#endif /* LCD_H_ */

Source/lcd.c

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+/*
+ * lcd.c
+ *
+ *  Created on: 10/06/2018
+ *      Author: Olivier Van den Eede
+ */
+
+#include "lcd.h"
+
+const uint8_t ROW_16[] = {0x00, 0x40, 0x10, 0x50};
+const uint8_t ROW_20[] = {0x00, 0x40, 0x14, 0x54};
+/************************************** Static declarations **************************************/
+
+static void lcd_write_data(Lcd_HandleTypeDef * lcd, uint8_t data);
+static void lcd_write_command(Lcd_HandleTypeDef * lcd, uint8_t command);
+static void lcd_write(Lcd_HandleTypeDef * lcd, uint8_t data, uint8_t len);
+
+
+/************************************** Function definitions **************************************/
+
+/**
+ * Create new Lcd_HandleTypeDef and initialize the Lcd
+ */
+Lcd_HandleTypeDef Lcd_create(
+		Lcd_PortType port[], Lcd_PinType pin[],
+		Lcd_PortType rs_port, Lcd_PinType rs_pin,
+		Lcd_PortType en_port, Lcd_PinType en_pin, Lcd_ModeTypeDef mode)
+{
+	Lcd_HandleTypeDef lcd;
+
+	lcd.mode = mode;
+
+	lcd.en_pin = en_pin;
+	lcd.en_port = en_port;
+
+	lcd.rs_pin = rs_pin;
+	lcd.rs_port = rs_port;
+
+	lcd.data_pin = pin;
+	lcd.data_port = port;
+
+	Lcd_init(&lcd);
+
+	return lcd;
+}
+
+/**
+ * Initialize 16x2-lcd without cursor
+ */
+void Lcd_init(Lcd_HandleTypeDef * lcd)
+{
+	if(lcd->mode == LCD_4_BIT_MODE)
+	{
+			lcd_write_command(lcd, 0x33);
+			lcd_write_command(lcd, 0x32);
+			lcd_write_command(lcd, FUNCTION_SET | OPT_N);				// 4-bit mode
+	}
+	else
+		lcd_write_command(lcd, FUNCTION_SET | OPT_DL | OPT_N);
+
+
+	lcd_write_command(lcd, CLEAR_DISPLAY);						// Clear screen
+	lcd_write_command(lcd, DISPLAY_ON_OFF_CONTROL | OPT_D);		// Lcd-on, cursor-off, no-blink
+	lcd_write_command(lcd, ENTRY_MODE_SET | OPT_INC);			// Increment cursor
+}
+
+/**
+ * Write a number on the current position
+ */
+void Lcd_int(Lcd_HandleTypeDef * lcd, int number)
+{
+	char buffer[11];
+	sprintf(buffer, "%d", number);
+
+	Lcd_string(lcd, buffer);
+}
+
+/**
+ * Write a string on the current position
+ */
+void Lcd_string(Lcd_HandleTypeDef * lcd, char * string)
+{
+	for(uint8_t i = 0; i < strlen(string); i++)
+	{
+		lcd_write_data(lcd, string[i]);
+	}
+}
+
+/**
+ * Set the cursor position
+ */
+void Lcd_cursor(Lcd_HandleTypeDef * lcd, uint8_t row, uint8_t col)
+{
+	#ifdef LCD20xN
+	lcd_write_command(lcd, SET_DDRAM_ADDR + ROW_20[row] + col);
+	#endif
+
+	#ifdef LCD16xN
+	lcd_write_command(lcd, SET_DDRAM_ADDR + ROW_16[row] + col);
+	#endif
+}
+
+/**
+ * Clear the screen
+ */
+void Lcd_clear(Lcd_HandleTypeDef * lcd) {
+	lcd_write_command(lcd, CLEAR_DISPLAY);
+}
+
+
+/************************************** Static function definition **************************************/
+
+/**
+ * Write a byte to the command register
+ */
+void lcd_write_command(Lcd_HandleTypeDef * lcd, uint8_t command)
+{
+	HAL_GPIO_WritePin(lcd->rs_port, lcd->rs_pin, LCD_COMMAND_REG);		// Write to command register
+
+	if(lcd->mode == LCD_4_BIT_MODE)
+	{
+		lcd_write(lcd, (command >> 4), LCD_NIB);
+		lcd_write(lcd, command & 0x0F, LCD_NIB);
+	}
+	else
+	{
+		lcd_write(lcd, command, LCD_BYTE);
+	}
+
+}
+
+/**
+ * Write a byte to the data register
+ */
+void lcd_write_data(Lcd_HandleTypeDef * lcd, uint8_t data)
+{
+	HAL_GPIO_WritePin(lcd->rs_port, lcd->rs_pin, LCD_DATA_REG);			// Write to data register
+
+	if(lcd->mode == LCD_4_BIT_MODE)
+	{
+		lcd_write(lcd, data >> 4, LCD_NIB);
+		lcd_write(lcd, data & 0x0F, LCD_NIB);
+	}
+	else
+	{
+		lcd_write(lcd, data, LCD_BYTE);
+	}
+
+}
+
+/**
+ * Set len bits on the bus and toggle the enable line
+ */
+void lcd_write(Lcd_HandleTypeDef * lcd, uint8_t data, uint8_t len)
+{
+	for(uint8_t i = 0; i < len; i++)
+	{
+		HAL_GPIO_WritePin(lcd->data_port[i], lcd->data_pin[i], (data >> i) & 0x01);
+	}
+
+	HAL_GPIO_WritePin(lcd->en_port, lcd->en_pin, 1);
+	DELAY(1);
+	HAL_GPIO_WritePin(lcd->en_port, lcd->en_pin, 0); 		// Data receive on falling edge
+}