1.问题描述：
时间设置到2020-01-01 00:00:00之前，时间不能跳到2020-01-01 00:00:00；
https://www.nxp.com.cn/docs/zh/data-sheet/PCF8563.pdf
1 #include "stdio.h"
2 #include "lib_i2c.h"
3 //==============================================================================
4 //
5 // DEFINES
6 //
7 //==============================================================================
8
9 #define I2C_ADDR (0xA2>>1)
10
11 //==============================================================================
12 //
13 // EXTERNAL VARIABLES REFERENCE
14 //
15 //==============================================================================
16
17 //==============================================================================
18 //
19 // EXTERNAL FUNCTION PROTOTYPES
20 //
21 //==============================================================================
22
23 //==============================================================================
24 //
25 // VARIABLES
26 //
27 //==============================================================================
28
29 //==============================================================================
30 //
31 // FUNCTIONS
32 //
33 //==============================================================================
34 s32 gm_pcf8563_check()
35 {
36 s32 REG0,REG1,REG2;
37 REG0 = gm_i2c_read(I2C_ADDR,0x02);
38 REG1 = gm_i2c_read(I2C_ADDR,0x03);
39 REG2 = gm_i2c_read(I2C_ADDR,0x04);
40 printf("0:%d,1:%d,2:%d\n",REG0,REG1,REG2);
41 if((REG0 < 0) || (REG1 < 0) || (REG2 < 0) || (REG0 == 0xFF) || (REG1 == 0xFF) || (REG2 == 0xFF))
42 {
43 printf("pcf8563 not exist\n");
44 return -1;
45 }
46 else
47 {
48 printf("pcf8563 exist\n");
49 return 0;
50 }
51 }
52
53
54 s32 gm_pcf8563_gettime(u32 *year, u32 *mon, u32 *mday,
55 u32 *hour, u32 *min, u32 *sec)
56 {
57 #if 1
58 struct i2c_msg msgs[2];
59 unsigned char tmp[2], tmp2[7];
60
61 tmp[0] = 0x2 & 0xFF;
62 msgs[0].addr = I2C_ADDR;
63 msgs[0].flags = 0;
64 msgs[0].len = 1;
65 msgs[0].buf = tmp;
66
67 tmp2[0] = 0;
68 msgs[1].addr = I2C_ADDR;
69 msgs[1].flags = 1;
70 msgs[1].len = 7;
71 msgs[1].buf = tmp2;
72
73 if (gm_i2c_transfer(msgs, 2) != 2){
74 printf("PCF8563 Get Fail\n");
75 return FAIL;
76 }
77 #if 0
78 {
79 int i;
80 printf("\n\n");
81 for(i=0; i<7; i++){
82 printf("%d, ", tmp2[i]);
83 }
84 printf("\n\n");
85 }
86 #endif
87 *sec = (u32)(((tmp2[0]>>4)&0x7)*10 + (tmp2[0]&0x0F));
88 *min = (u32)(((tmp2[1]>>4)&0x7)*10 + (tmp2[1]&0x0F));
89 *hour = (u32)(((tmp2[2]>>4)&0x3)*10 + (tmp2[2]&0x0F));
90 *mday = (u32)(((tmp2[3]>>4)&0x3)*10 + (tmp2[3]&0x0F));
91 *mon = (u32)(((tmp2[5]>>4)&0x1)*10 + (tmp2[5]&0x0F) + ((tmp2[5]&BIT7)? 1 : 0));
92 *year = (u32)(((tmp2[6]>>4)&0xF)*10 + (tmp2[6]&0x0F)) + 2000;
93 printf("hi,gm_pcf8563_gettime:%04d/%02d/%02d, %02d:%02d:%02d\n", *year, *mon, *mday, *hour, *min, *sec);
94 return SUCCESS;
95
96 #else
97 s32 value;
98
99 //lib_I2C_SetAddressMode(I2C_ADDR_MODE_8BIT);
100
101 if ((value = gm_i2c_read(I2C_ADDR, 0x02)) < 0)
102 {
103 goto pcf8563_get_fail;
104 }
105 else
106 {
107 *sec = (int)(((value>>4)&0x7)*10 + (value&0x0F));
108 }
109
110 if ((value = gm_i2c_read(I2C_ADDR, 0x03)) < 0)
111 {
112 goto pcf8563_get_fail;
113 }
114 else
115 {
116 *min = (int)(((value>>4)&0x7)*10 + (value&0x0F));
117 }
118
119 if ((value = gm_i2c_read(I2C_ADDR, 0x04)) < 0)
120 {
121 goto pcf8563_get_fail;
122 }
123 else
124 {
125 *hour = (int)(((value>>4)&0x3)*10 + (value&0x0F));
126 }
127
128 if ((value = gm_i2c_read(I2C_ADDR, 0x05)) < 0)
129 {
130 goto pcf8563_get_fail;
131 }
132 else
133 {
134 *mday = (int)(((value>>4)&0x3)*10 + (value&0x0F));
135 }
136
137 if ((value = gm_i2c_read(I2C_ADDR, 0x07)) < 0)
138 {
139 goto pcf8563_get_fail;
140 }
141 else
142 {
143 *mon = (int)(((value>>4)&0x1)*10 + (value&0x0F) + ((value&BIT7)? 1 : 0));
144 }
145
146 if ((value = gm_i2c_read(I2C_ADDR, 0x08)) < 0)
147 {
148 goto pcf8563_get_fail;
149 }
150 else
151 {
152 *year = (int)(((value>>4)&0xF)*10 + (value&0x0F)) + 1900; /* years since 1900 */
153 }
154
155 printf("gm_pcf8563_gettime: %d-%d-%d %d:%d:%d\n", *year, *mon, *mday, *hour, *min, *sec);
156
157 return SUCCESS;
158
159 pcf8563_get_fail:
160 printf("PCF8563 Get Fail\n");
161 return FAIL;
162 #endif
163 }
164
165 s32 gm_pcf8563_settime(u32 year, u32 mon, u32 mday,
166 u32 hour, u32 min, u32 sec)
167 {
168 if (year < 2000 || year > 2100 || mon > 12 || mday > 31 || //steven 20130410
169 hour > 23 || min > 59 || sec > 59)
170 {
171 return FAIL;
172 }
173 else
174 {
175 //lib_I2C_SetAddressMode(I2C_ADDR_MODE_8BIT);
176
177 if (gm_i2c_write(I2C_ADDR, 0x02, (((sec/10)&0x7)<<4)|((sec%10)&0xF)) < 0)
178 {
179 goto pcf8563_set_fail;
180 }
181
182 if (gm_i2c_write(I2C_ADDR, 0x03, (((min/10)&0x7)<<4)|((min%10)&0xF)) < 0)
183 {
184 goto pcf8563_set_fail;
185 }
186
187 if (gm_i2c_write(I2C_ADDR, 0x04, (((hour/10)&0x3)<<4)|((hour%10)&0xF)) < 0)
188 {
189 goto pcf8563_set_fail;
190 }
191
192 if (gm_i2c_write(I2C_ADDR, 0x05, (((mday/10)&0x3)<<4)|((mday%10)&0xF)) < 0)
193 {
194 goto pcf8563_set_fail;
195 }
196
197 if (gm_i2c_write(I2C_ADDR, 0x07, (((mon/10)&0x1)<<4)|((mon%10)&0xF)) < 0)
198 {
199 goto pcf8563_set_fail;
200 }
201
202 if (gm_i2c_write(I2C_ADDR, 0x08, ((((year-2000)/10)&0xF)<<4)|(((year-2000)%10)&0xF)) < 0)
203 {
204 goto pcf8563_set_fail;
205 }
206 }
207 printf("\n\n\ngm_pcf8563_settime22:%04d/%02d/%02d, %02d:%02d:%02d\n\n\n\n", year, mon, mday, hour, min, sec);
208 return SUCCESS;
209
210 pcf8563_set_fail:
211 printf("PCF8563 Set Fail\n");
212 return FAIL;
213 }
原文地址：https://www.cnblogs.com/feige1314/p/12422395.html
时间： 2024-10-10 00:56:05