A program about PCF8563T, not tuned out

q891031520

A program about PCF8563T, not tuned out [Copy link]

I recently tried to use the PCF8563T chip and communicate with IIC, but after several attempts, I could not write data in or read data out. But the same logic 51 can read and write. I found a brother's code on the Internet. After modifying it, it still doesn't work. I posted the program for everyone to help me. I have not used IIC much. /* PCF8563 low-level driver2006-04-18 */ #include
//#include "msp430_m.h" #include "BaseConfig.h" #define ADDR_RD 0xa3 #define ADDR_WR 0xa2 #define REG_CTL1 0x00 #define REG_CTL2 0x01 #define REG_SEC 0x02 #define REG_MIN 0x03 #define REG_HOUR 0x04 #define REG_DAY 0x05 #define REG_WEEK 0x06 #define REG_MON 0x07 #define REG_YEAR 0x08 #define REG_ALARM_MIN 0x09 #define REG_ALARM_HOUR 0x0a #define REG_ALARM_DAY 0x0b #define REG_ALARM_WEEK 0x0c #define REG_FREQ 0x0d #define REG_TMRCTL 0x0e #define REG_TMR 0x0f #define uchar unsigned char #define uint unsigned int //************ ****************************************** #define set_sda() Set_Bit(P3OUT ,BIT2)//bitclr(P4DIR,BIT0); //Set to input mode, because there is a pull-up resistor, the output is high level #define clr_sda() Clr_Bit(P3OUT,BIT2) //bitset(P4DIR,BIT0) / /Set to output mode, port POUT must be set to 0 when initialized #define sdain() Clr_Bit(P3DIR,BIT2) #define sdaout() Set_Bit(P3DIR,BIT2) [ i]#define set_sclk() Set_Bit(P3OUT,BIT3)//bitset(P4OUT,BIT3) #define clr_sclk() Clr_Bit(P3OUT,BIT3)//bitclr(P4OUT,BIT3) #define sclkout() Set_Bit(P3OUT,BIT3) #define bittest_sda_1 () (P3IN&BIT2)==BIT2//bittest(P4IN,BIT0) //Test whether the input signal of SDA is 1 //********************** *********************************************** uchar time_init_data[7]={ 0,0,12,5,5,9,14}; uchar time_data[7]={0,0,0,0,0,0,0}; uint sec; void test_pcf8563(void); void InitOSC(void ) { unsigned char i; BCSCTL1 &= ~XT2OFF; //Turn on XT oscillator BCSCTL2 |= SELM_2+ SELS + DIVS_3; do { IFG1 &= ~OFIFG; //Clear oscillation error flag for(i = 0; i < 100; i++) _NOP(); //Delay waiting} while ((IFG1 & OFIFG) != 0); //If the flag is 1, continue to loop and wait} static void Start(void) //ok,Start the IIC bus { sdaout(); sclkout(); set_sda(); //1 _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP() ; _NOP(); _NOP(); _NOP(); clr_sda(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk(); _NOP(); _NOP(); _NOP (); _NOP(); _NOP(); } static void Stop(void) { clr_sda(); _NOP(); _NOP( ); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); set_sda(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk(); _NOP(); _NOP( ); _NOP(); _NOP(); _NOP(); } static void Ack(void) { clr_sda(); _NOP() ; _NOP(); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk(); _NOP(); _NOP (); _NOP(); _NOP(); _NOP(); } static void NoAck(void) { set_sda(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP (); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP() ; } static void Write8Bit(unsigned char input) { unsigned char i; for(i=0;i<8;i--) { if(input&0x80) { set_sda(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); } else { clr_sda(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); clr_sclk (); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); } input<<=1; } } /*************************************/[/ i] static unsigned char Read8Bit(void) { unsigned char i,rbyte; rbyte=0; for(i=0;i<8;i++) { sdain(); _NOP(); _NOP( ); _NOP(); _NOP(); _NOP(); set_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); rbyte<<=1; if(bittest_sda_1()) rbyte|=0x01; clr_sclk(); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); } return(rbyte); } [i ]/*************************************/ void pcf8563_wr(uchar addr,uchar *ptr_data1,uchar length) { Start(); Write8Bit(ADDR_WR); _NOP(); _NOP(); _NOP(); _NOP(); _NOP(); Write8Bit(addr); _NOP(); _NOP(); _NOP(); for(;length;--length) { Write8Bit(*ptr_data1++); _NOP();_NOP();_NOP();_NOP();_NOP(); } Stop(); } /*************************************/[/ i] void pcf8563_rd(uchar addr,uchar *ptr_data1,uchar length) { Start(); Write8Bit(ADDR_WR); Write8Bit(addr); Start(); Write8Bit(ADDR_RD); for(;length;length--) { Ack(); *ptr_data1++=Read8Bit(); } NoAck(); Stop(); } void rtc_init() { Start(); Write8Bit(ADDR_WR); Write8Bit(0x00); Write8Bit(0x00); Stop(); } void main (void) { WDTCTL = WDTPW + WDTHOLD; rtc_init(); while(1) pcf8563_rd(0x02,time_data,7); } /****************************** ****/ #if 0 uint sec; void test_pcf8563(void) { uchar i,arr[16]; uchar const arr_init_rtc[]= { 0x00, 0x00, 0x00, 0x00, 0x08, 0x01, 0x01, 0x05, 0x04, 0x80, 0x80, 0x80, 0x80, 0x83, 0x00 }; for(i=0;i="arr_init_rtc;" for(;;)="" for(i="0;i<20;++i)" pcf8563_rd(0,arr,8);="" pcf8563_wr(0,arr,sizeof(arr_init_rtc));="" sec="(arr[2]" {="">>4)*10; sec+=arr[2]&0x0f; i=sec; _NOP(); } } #endif /****************************** *******************/

q891031520

This is the source file

q891031520

The analog IIC is used because the IIC pin is already occupied, and the actual data read out is FFFFFFFFFF.

chenbingjy

Timing problem, use an oscilloscope to view the waveform

q891031520

This is an old post. It is better to write your own code than to trust other people's code. Thanks to all the brothers!