DS1302输出为什么都是零

杀手天使 · 发表于 2015-5-22 14:48:17

[mw_shl_code=c,true]#include "stm32f10x.h" #include "bsp_led.h" #define DS1302_SCLK_HIGH LED3_OFF ; //?????????? 1 #define DS1302_SCLK_LOW LED3_ON ; //?????????? 0 #define DS1302_IO_HIGH LED4_OFF ; #define DS1302_IO_LOW LED4_ON ; #define DS1302_RST_HIGH LED5_OFF; #define DS1302_RST_LOW LED5_ON ; typedef struct __SYSTEMTIME__ { u8 Second; u8 Minute; u8 Hour; u8 Week; u8 Day; u8 Month; u8 Year; u8 DateString[9]; u8 TimeString[9]; }SYSTEMTIME; //time mode #define AM(X) X #define PM(X) (X+12) //24 hour #define DS1302_SECOND 0x80 #define DS1302_MINUTE 0x82 #define DS1302_HOUR 0x84 #define DS1302_WEEK 0x8A #define DS1302_DAY 0x86 #define DS1302_MONTH 0x88 #define DS1302_YEAR 0x8C #define DS1302_RAM(X) (0xC0+(X)*2) void DS1302InputByte(u8 d) { u8 i,ReadValue ; for(i=8;i > 0 ; i-- ) { if(d & 0x01 ) { DS1302_IO_HIGH } else { DS1302_IO_LOW } d>>= 1 ; DS1302_SCLK_HIGH DS1302_SCLK_LOW } } u8 DS1302OutputByte(void) { u8 i, ReadValue ; DS1302_IO_HIGH for( i = 8 ; i > 0 ; i-- ) { ReadValue >>= 1 ; if(GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)==1) //io high { ReadValue |= DS1302_SECOND ; } else { ReadValue &= 0x7f ; } DS1302_SCLK_HIGH DS1302_SCLK_LOW } return ReadValue ; } void Write1302(u8 a, u8 d) { DS1302_RST_LOW DS1302_SCLK_LOW DS1302_RST_HIGH DS1302InputByte( a ) ; DS1302InputByte(d) ; DS1302_RST_LOW DS1302_SCLK_HIGH } u8 Read1302(u8 a) { u8 ReadValue ; DS1302_RST_LOW DS1302_SCLK_LOW DS1302_RST_HIGH DS1302InputByte(a ) ; ReadValue = DS1302OutputByte() ; DS1302_RST_LOW DS1302_SCLK_HIGH return ReadValue ; } void DS1302_SetProtect(c) { if(c) Write1302(0x8E,0x10); else Write1302(0x8E,0x00); } void DS1302_SetTime(unsigned char Address, unsigned char Value) { DS1302_SetProtect(0); Write1302(Address, ((Value/10)<<4 | (Value%10))); } void DS1302_GetTime(SYSTEMTIME *Time) //8--10 { unsigned char ReadValue; ReadValue = Read1302(DS1302_SECOND); Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_MINUTE); Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_HOUR); Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_DAY); Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_WEEK); Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_MONTH); Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); ReadValue = Read1302(DS1302_YEAR); Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F); } void DateToStr(SYSTEMTIME *Time) { Time->DateString[0] = Time->Year ; Time->DateString[2] = '-'; Time->DateString[3] = Time->Month; Time->DateString[5] = '-'; Time->DateString[6] = Time->Day ; Time->DateString[8] = '\0'; } void TimeToStr(SYSTEMTIME *Time) { Time->TimeString[0] = Time->Hour ; Time->TimeString[2] = ':'; Time->TimeString[3] = Time->Minute; Time->TimeString[5] = ':'; Time->TimeString[6] = Time->Second; Time->DateString[8] = '\0'; } void Initial_DS1302(void) { unsigned char Second=Read1302(DS1302_SECOND); if(Second&0x80) DS1302_SetTime(DS1302_SECOND,0); } int main() { u8 t0,t1,t2; SYSTEMTIME CurrentTime; Initial_DS1302(); DS1302_SetTime(DS1302_HOUR,10); DS1302_SetTime(DS1302_MINUTE,54); DS1302_SetTime(DS1302_SECOND,30); uart_init(115200); while(1) { SYSTEMTIME CurrentTime; DS1302_GetTime(&CurrentTime); DateToStr(&CurrentTime); TimeToStr(&CurrentTime); t0=CurrentTime.TimeString[0]; t1=CurrentTime.TimeString[3]; t2=CurrentTime.TimeString[6]; printf("t0??%d\nt1??%d\nt2??%d\n",t0,t1,t2); } }[/mw_shl_code]