Easyelectronics.ru

#include "stm32f10x.h"

#define Set_PortB_Pin_10_output ((GPIOB->CRH |= 0x200)|(GPIOB->CRH &= ~0xC00))
#define Set_PortB_Pin_11_output ((GPIOB->CRH |= 0x2000)|(GPIOB->CRH &= ~0xC000))
#define Set_PortB_Pin_12_output ((GPIOB->CRH |= 0x20000)|(GPIOB->CRH &= ~0xC0000))
#define Set_PortB_Pin_13_output ((GPIOB->CRH |= 0x200000)|(GPIOB->CRH &= ~0xC00000))
#define Set_PortB_Pin_14_output ((GPIOB->CRH |= 0x2000000)|(GPIOB->CRH &= ~0xC000000))
#define Set_PortB_Pin_15_output ((GPIOB->CRH |= 0x20000000)|(GPIOB->CRH &= ~0xC0000000))

void Delay (long cnt)
{
while (cnt--);
}

void WriteByte4 (char b)
{
GPIOB->BSRR = GPIO_BSRR_BR10;
GPIOB->BSRR = GPIO_BSRR_BR11;
GPIOB->BSRR = GPIO_BSRR_BR12;
GPIOB->BSRR = GPIO_BSRR_BR13;

GPIOB->BSRR = (b & 0xF)<<10;

GPIOB->BSRR = GPIO_BSRR_BS14;
Delay(100);
GPIOB->BSRR = GPIO_BSRR_BR14;
Delay(100);

GPIOB->BSRR = GPIO_BSRR_BS10;
GPIOB->BSRR = GPIO_BSRR_BS11;
GPIOB->BSRR = GPIO_BSRR_BS12;
GPIOB->BSRR = GPIO_BSRR_BS13;
}

void WriteByte (char b)
{
WriteByte4 (b>>4);
WriteByte4 (b);
}

void WriteCommand (char c)
{
GPIOB->BSRR = GPIO_BSRR_BR15;
WriteByte (c);
}

void WriteData (char d)
{
GPIOB->BSRR = GPIO_BSRR_BS15;
WriteByte (d);
}

void ClrLCD (void)
{
WriteCommand (0x01);
}

void InitLCD (void)
{
Delay(1000000);
GPIOB->BRR = 0xFC00;
WriteByte4(0x30);
Delay(10000);
WriteByte4(0x30);
Delay(10000);
WriteByte4(0x30);
Delay(1000);
WriteByte4(0x20);
Delay(1000);
WriteCommand (0x20);
Delay(1000);
WriteCommand (0x28);
Delay(1000);
WriteCommand (0x0C);
Delay(1000);
WriteCommand (0x06);
Delay(1000);
WriteCommand (0x01);
Delay(1000);
WriteCommand (0x01);
Delay(1000);
WriteCommand (0x01);
Delay(1000);
WriteCommand (0x01);
}

void LCDputc (char c)
{
WriteData(c);
}

void LCDputs (char *s)
{
while (*s)
{
LCDputc (*s++);
}
}

void LCDgotoxy (char x, char y)
{
char c;

c = --x;
if (--y)
{
c |= 0x40;
}
WriteCommand (c | 0x80);
}

void DevsInit(void)
{
RCC->APB2ENR |= RCC_APB2ENR_IOPBEN;

Set_PortB_Pin_10_output;
Set_PortB_Pin_11_output;
Set_PortB_Pin_12_output;
Set_PortB_Pin_13_output;
Set_PortB_Pin_14_output;
Set_PortB_Pin_15_output;
}

int main (void)
{
SystemInit();
DevsInit();
InitLCD();
LCDgotoxy (4, 1);
LCDputs ("Test LCD");
}