132 lines
2.6 KiB
C
132 lines
2.6 KiB
C
#include "lcd_hd44780.h"
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#include <stddef.h>
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void lcd_hd44780_writeToDisp(cm_lcd_hd44780_t *inst){
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inst->setGetGpio_event(&(inst->gpio_data),LCD_HD44780_SET);
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}
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/*
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void lcd_hd44780_clearDisp(lcd_hd44780_t *inst){
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return;
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}
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void lcd_hd44780_printf(lcd_hd44780_t *inst, char *string){
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return;
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}*/
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static void lcd_writeCmd_disp(cm_lcd_hd44780_t *inst, hd44780_cmd_t cmd, hd44780_setGet_t getSet){
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inst->gpio_data.data_bus = cmd;
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inst->gpio_data.rw_pin = getSet;
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// We want to write an instruction.
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inst->gpio_data.rs_pin = LCD_HD44780_INSTRUCTION;
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// E pin is sopposed to be zero when data is ready on port.
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inst->gpio_data.e_pin = 0;
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inst->setGetGpio_event(&(inst->gpio_data),getSet);
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// Then Clock data in with E pin:
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inst->gpio_data.e_pin = 1;
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inst->setGetGpio_event(&(inst->gpio_data),getSet);
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// Then Clock data in with E pin:
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inst->gpio_data.e_pin = 0;
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inst->setGetGpio_event(&(inst->gpio_data),getSet);
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}
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void lcd_hd44780_initDisp_8bit(cm_lcd_hd44780_t *inst){
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// Wait for more than 15ms after VCC rise..
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// Delay(15)
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lcd_writeCmd_disp(inst, LCD_HD44780_FUNCTION_SET,LCD_HD44780_SET);
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// Wait for 4.1ms..
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// Delay(4)
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lcd_writeCmd_disp(inst, LCD_HD44780_DISP_ONOFF_CTL,LCD_HD44780_SET);
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// delay 100us
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lcd_writeCmd_disp(inst, LCD_HD44780_ENTRY_MODE,LCD_HD44780_SET);
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}
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void lcd_hd44780_initDisp_4bit(cm_lcd_hd44780_t *inst){
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// Wait for more than 15ms after VCC rise..
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// Delay(15)
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lcd_writeCmd_disp(inst, LCD_HD44780_FUNCTION_SET >> 4,LCD_HD44780_SET);
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// Delay(4)
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lcd_writeCmd_disp(inst, LCD_HD44780_FUNCTION_SET >> 4,LCD_HD44780_SET);
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// Delay(4)
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lcd_writeCmd_disp(inst, LCD_HD44780_FUNCTION_SET >> 4,LCD_HD44780_SET);
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}
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void lcd_hd44780_regGpioEvt(cm_lcd_hd44780_t *inst, setGet_Gpio_Event_fpt getGpioEvt_fpt){
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//if(inst == NULL)return;
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inst->setGetGpio_event = getGpioEvt_fpt;
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}
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void lcd_hd44780_regWaitEvt(cm_lcd_hd44780_t *inst, wait_ms_Event_fpt waitEvt_fpt){
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//if(inst == NULL)return;
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inst->wait_event = waitEvt_fpt;
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}
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void lcd_hd44780_init(cm_lcd_hd44780_t *inst, lcd_hd44780_bitmode bit_mode){
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//inst->gpio_data = 0x00;
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inst->bit_mode = bit_mode;
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/*
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inst->gpio_data.data_bus = 0x0;
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inst->gpio_data.e_pin = 0x0;
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inst->gpio_data.rs_pin = 0x1;
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inst->gpio_data.rw_pin = 0x0;
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inst->setGetGpio_event(&(inst->gpio_data), 1);*/
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//lcd_hd44780_initDisp(inst);
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//lcd_writeCmd_disp(inst,LCD_HD44780_CLEAR_DISP,LCD_HD44780_SET);
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//lcd_writeCmd_disp(inst,LCD_HD44780_DISP_ONOFF_CTL,LCD_HD44780_SET);
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switch (inst->bit_mode) {
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case LCD_BITMODE_8BIT:
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lcd_hd44780_initDisp_8bit(inst);
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break;
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case LCD_BITMODE_4BIT:
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break;
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default:
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break;
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}
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return;
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}
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