In my project i have interfaced stm8s003f3 with3 digit 7 segment display via 74hc595d in order to reduce the used pin count in stm8s. From the Stm8s 3 pin are to 74hc595d (sh_cp,st_cp,ds) and three pin to digits pin of 7 segment display. I attaching my program code. please provide some suggestions .
/* MAIN.C file
*
* Copyright (c) 2002-2005 STMicroelectronics
*/
#include "stm8s.h"
void clock_setup(void);
void GPIO_SETUP(void);
void serial_clock(void);
void latch_enable(void);
void data_show(unsigned char data);
void digit_cal(unsigned char digit);
void _delay_us(int delay);
unsigned char Numbers[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
main()
{
GPIO_SETUP();
clock_setup();
digit_cal(1);
while (TRUE)
{
//digit_cal(1);
}
}
void GPIO_SETUP(void)
{
GPIO_DeInit(GPIOD);
GPIO_Init(GPIOA,GPIO_PIN_3,GPIO_MODE_OUT_PP_HIGH_FAST);
GPIO_DeInit(GPIOC);
GPIO_Init(GPIOC,GPIO_PIN_3,GPIO_MODE_OUT_PP_LOW_FAST);
GPIO_Init(GPIOC,GPIO_PIN_4,GPIO_MODE_OUT_PP_LOW_FAST);
GPIO_Init(GPIOC,GPIO_PIN_5,GPIO_MODE_OUT_PP_HIGH_FAST);
GPIO_Init(GPIOC,GPIO_PIN_6,GPIO_MODE_OUT_PP_HIGH_FAST);
GPIO_Init(GPIOC,GPIO_PIN_7,GPIO_MODE_OUT_PP_HIGH_FAST);
}
void serial_clock(void)
{
GPIO_WriteHigh(GPIOA, GPIO_PIN_3);
_delay_us(10000);
GPIO_WriteLow(GPIOA, GPIO_PIN_3);
_delay_us(10000);
}
void latch_enable(void)
{
GPIO_WriteHigh(GPIOC,GPIO_PIN_4);
_delay_us(10000);
GPIO_WriteLow(GPIOC,GPIO_PIN_4);
_delay_us(10000);
}
void data_show(unsigned char data)
{
int i=0;
for(i=0;i<8;i++)
{
if((data>>i) & 0x01)
{
GPIO_WriteHigh(GPIOC,GPIO_PIN_3);
}
else
{
GPIO_WriteHigh(GPIOC,GPIO_PIN_3);
}
serial_clock();
}
latch_enable();
}
void digit_cal(unsigned char digit_in)
{
int seg=1;
int n=0;
switch(seg)
{
case 1:
{
n=((digit_in/100)%10);
data_show(Numbers[n]);
GPIO_WriteHigh(GPIOC,GPIO_PIN_5);
break;
}
case 2:
{
n=((digit_in/10)%10);
data_show(Numbers[n]);
GPIO_WriteHigh(GPIOC,GPIO_PIN_6);
break;
}
case 3:
{
n=(digit_in%10);
data_show(Numbers[n]);
GPIO_WriteHigh(GPIOC,GPIO_PIN_7);
break;
}
}
seg ++;
if (seg>1)
{
seg=1;
}
}
void _delay_us(int delay)
{
int m=0;
for(m=0;m<delay;m++)
{
;
}
}
void clock_setup(void)
{
CLK_DeInit();
CLK_HSECmd(DISABLE);
CLK_LSICmd(DISABLE);
CLK_HSICmd(ENABLE);
while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == FALSE);
CLK_ClockSwitchCmd(ENABLE);
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV8);
CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);
CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSI,
DISABLE, CLK_CURRENTCLOCKSTATE_ENABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_SPI, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_ADC, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_AWU, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_UART1, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER1, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER2, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER4, DISABLE);
}
