/***************************************************************************//**
* @brief Initial the LCD1602
******************************************************************************/
void Lcd_Init(void)
{
char const *p;
int i;
/* Enable clock for peripheral */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
Delay(1500000);
GPIO_WriteBit(GPIOC, GPIO_Pin_8, Bit_SET);
/* Set all pins for LCD as outputs */
LCD_ALL_DIR_OUT();
Delay(1500000);
GPIO_WriteBit(GPIOA, RS, Bit_RESET);
Lcd_Write_4bits(0x3); /* Select 4-bit interface */
Delay(410000);
Lcd_Write_4bits(0x3);
Delay(10000);
Lcd_Write_4bits(0x3);
Lcd_Write_4bits(0x2);
Lcd_Write_Command(0x28); /* 2 lines, 5x8 character matrix */
Lcd_Write_Command(0x0C); /* Display ctrl:Disp=ON,Curs/Blnk=OFF */
Lcd_Write_Command(0x06); /* Entry mode: Move right, no shift */
/* Load user-specific characters into CGRAM */
Lcd_Write_Command(0x40); /* Set CGRAM address counter to 0 */
p = &UserFont[0][0];
for (i = 0; i < sizeof(UserFont); i++, p++)
lcd_print (*p);
Lcd_Write_Command(0x80); /* Set DDRAM address counter to 0 */
GPIO_WriteBit(GPIOC, GPIO_Pin_8, Bit_RESET);
}
static void Lcd_Cursor(uint8_t column, uint8_t line){
uint8_t position = LCD_2X16_DDRAM_ADDR;
if (line > 0)
{
position |= LCD_2X16_NEXT_LINE;
}
Lcd_Write_Command(position | column);
}
/*******************************************************************************
* @brief : Set cursor position on LCD display
* @param[in] column : Column position
* @param[in] line : Line position
*******************************************************************************/
void set_cursor(int column, int line)
{
unsigned char address;
address = (line * 40) + column;
address = 0x80 + (address & 0x7F);
Lcd_Write_Command(address); /* Set DDRAM address counter to 0 */
}
void Lcd_SetXY(unsigned char x,unsigned char y) //字符初始位置设定，x表示列，y表示行
{
unsigned char addr; //D7为位置使能位，D6控制行数
if(y==0)
addr=0x80+x;
else if(y==1)
addr=0xC0+x;
Lcd_Write_Command(addr,1) ;
}
static void Lcd_Init(void){
lsObjectInit(&myLCD);
Lcd_Pin_Dir();
chThdSleepMilliseconds(500);
palWritePort(LCD_PORT_CRTL,0x00);
palWritePort(LCD_PORT_DATA,0x00);
palSetPad(LCD_PORT_DATA,LCD_PIN_D5);
palSetPad(LCD_PORT_CRTL,LCD_PIN_EN);
chThdSleepMilliseconds(40);
palClearPad(LCD_PORT_CRTL,LCD_PIN_EN);
chThdSleepMilliseconds(40);
Lcd_Write_Command(0x28);
chThdSleepMicroseconds(40);
Lcd_Write_Command(0x0c);
chThdSleepMicroseconds(40);
}
void pm25_read()
{
asm("sim"); //禁止中断
int i = 7;
u16 comp;
u16 value;
u16 pm25_value[6]={0,0,0,0,0,0};
char string_pm25[15];
LED_Y = 0;
#if 0 //原始的查找0xff和0xaa函数
u16 temp_value[2]={0,0};
while(1)
{
temp_value[0] = read_pm25_byte();
temp_value[1] = read_pm25_byte();
if((0xff == temp_value[0])&&(0xaa == temp_value[1]))
break;
}
#endif
while(!((read_pm25_byte()==0xff)&&(read_pm25_byte()==0xaa)));//查找0xff与0xaa相连，作为起始；
for(i = 0;i < 6;++i)
pm25_value[i] = read_pm25_byte();
asm("rim"); //开总中断
comp = pm25_value[0] + pm25_value[1] + pm25_value[2] + pm25_value[3];
if(comp >255) comp -= 256; //处理溢出
if(comp == pm25_value[4])
{
value = (u16)((pm25_value[0] << 8 | pm25_value[1])*1.43); //直接转化为ug/m3；3.5mg/m3对应1V
/*
标准的比例为3.5mg/m3
ADC转化为电平信号： ADC/1024*5
结合起来，变成 ADC*5/3.5 ug/m3 约为 ADC*1.43 ug/m3;
之后再经过adc_convert函数转化为 千分之一的小数，单位变为mg/m3
*/
convert(string_pm25,value); //adc转化为小数
Lcd_Write_Command( 0x01,1); //清屏
Lcd_Puts(0,1,"P25: mg/m3");
Lcd_Puts(4,1,(uchar*)string_pm25);
LED_Y = 1;
}
}
void pm25_read()
{
asm("sim"); //禁止中断
LED_G = 0;
int i = 7;
u16 comp;
u16 value;
u16 pm25_value[6]={0,0,0,0,0,0};
char string_pm25[15];
#if 0
u16 temp_value[2]={0,0};
while(1)
{
temp_value[0] = read_pm25_byte();
temp_value[1] = read_pm25_byte();
if((0xff == temp_value[0])&&(0xaa == temp_value[1]))
break;
}
#endif
while(!((read_pm25_byte()==0xff)&&(read_pm25_byte()==0xaa)));//查找0xff与0xaa相连，作为起始；
for(i = 5;i >= 0;--i)
{
pm25_value[5-i] = read_pm25_byte();
//delay_us(4000);
}
comp = pm25_value[0] + pm25_value[1] + pm25_value[2] + pm25_value[3];
if(comp >255) //处理数据溢出
comp -= 256;
if(comp == pm25_value[4])
{
LED_G = 1;
}
asm("rim"); //开总中断
//value = (pm25_value[0] << 8 | pm25_value[1]) * 5; //转化为mV； 0.2mg/m3对应1V
value = (pm25_value[0] << 8 | pm25_value[1]); //直接转化为mg/m3 * 1000；0.2mg/m3对应1V
adc_convert(string_pm25,value);
Lcd_Write_Command( 0x01,1); //清屏
Lcd_Puts(0,1,"P25: mg/m3");
Lcd_Puts(4,1,(uchar*)string_pm25);
}
void Lcd_Init( void ) //初始化，，1602的套路
{
Lcd_GPIO_init();
delay_ms(15); //延时15ms
Lcd_Write_Command( 0x38,0); // 写指令38H 不检测忙信号
delay_ms(5); //延时5ms
Lcd_Write_Command( 0x38,0); // 写指令38H 不检测忙信号
delay_ms(5); //延时5ms
Lcd_Write_Command( 0x38,0); // 写指令38H 不检测忙信号
//以后每次写指令、读/写数据操作之前需检测忙信号
Lcd_Write_Command( 0x38,1); //显示模式设置
delay_ms(5); //延时5ms
Lcd_Write_Command( 0x08,1); //显示关闭
delay_ms(5); //延时5ms
Lcd_Write_Command( 0x01,1); //显示清屏
delay_ms(5); //延时5ms
Lcd_Write_Command( 0x06,1); //显示光标移动设置
delay_ms(5); //延时5ms
//Lcd_Write_Command( 0x0f,1);
Lcd_Write_Command( 0x0C,1); //显示开、光标不显示
//delay_ms(5); //延时5ms
}
static void Lcd_Clear (void){
Lcd_Write_Command(0x01);
chThdSleepMicroseconds(40);
}
/*******************************************************************************
* @brief Clear the LCD display *
*******************************************************************************/
void lcd_clear (void)
{
Lcd_Write_Command(0x01); /* Display clear */
set_cursor (0, 0);
}
