关于Hi3516A的RTC问题，有点蹊跷_问答

[code]#include
#include
#include
#include
#include
#include
#include
#include

typedef struct {
      unsigned int  year;
      unsigned int  month;
      unsigned int  date;
      unsigned int  hour;
      unsigned int  minute;
      unsigned int  second;
      unsigned int  weekday;
} rtc_time_t;

typedef struct {
unsigned char reg;
unsigned char val;
} reg_data_t;

typedef enum temp_sel_mode {
TEMP_SEL_FIXMODE  = 0,
TEMP_SEL_OUTSIDE,
TEMP_SEL_INTERNAL,
} temp_sel_mode;

typedef struct {
temp_sel_mode mode;
int value;
} reg_temp_mode_t;

typedef struct {
unsigned int freq_l;
} rtc_freq_t;

#define HI_RTC_AIE_ON _IO('p', 0x01)
#define HI_RTC_AIE_OFF _IO('p', 0x02)

#define HI_RTC_COMP_ON _IO('p', 0x03)
#define HI_RTC_COMP_OFF _IO('p', 0x04)

#define HI_RTC_GET_FREQ _IOR('P', 0x05, rtc_freq_t)
#define HI_RTC_SET_FREQ _IOW('p', 0x06, rtc_freq_t)

#define HI_RTC_ALM_SET _IOW('p', 0x07,  rtc_time_t)
#define HI_RTC_ALM_READ _IOR('p', 0x08,  rtc_time_t)
#define HI_RTC_RD_TIME _IOR('p', 0x09,  rtc_time_t)
#define HI_RTC_SET_TIME _IOW('p', 0x0a,  rtc_time_t)
#define HI_RTC_RESET _IOW('p', 0x0b,  rtc_time_t)
#define HI_RTC_REG_SET _IOW('p', 0x0c,  reg_data_t)
#define HI_RTC_REG_READ _IOR('p', 0x0d,  reg_data_t)

#define HI_RTC_SET_TEMP_MODE _IOW('p', 0x0e,  reg_temp_mode_t)
#define HI_RTC_GET_TEMP       _IOR('p', 0x0f,  char)

int main(int argc, const char *argv[])
{
rtc_time_t tm;
reg_data_t regv;
reg_temp_mode_t mode;
int ret = -1;
int fd = -1;
const char *dev_name = "/dev/hi_rtc";
char string[50] = {0};

memset(&tm, 0, sizeof(tm));

fd = open(dev_name, O_RDWR);
if (fd < 0) {
printf("open %s failed\n", dev_name);
exit(-1);
}

unsigned int freq;
rtc_freq_t value;

ret = ioctl(fd, HI_RTC_GET_FREQ, &value);
if (ret < 0)
{
printf("get current frequency failed\n");
exit(-2);
}

freq = value.freq_l;

if (freq > 3277000 || freq < 3276000)
{
printf("get invalid freq %d\n", freq);
exit(-3);
}
printf("current frequency : %d\n", freq);

printf("[RTC_RD_TIME]\n");
ret = ioctl(fd, HI_RTC_RD_TIME, &tm);
if (ret < 0)
{
printf("ioctl: HI_RTC_RD_TIME failed\n");
exit(-4);
}
struct tm tptr;
struct timeval tv;

tptr.tm_year = tm.year - 1900;
tptr.tm_mon  = tm.month - 1;
tptr.tm_mday = tm.date;
tptr.tm_hour = tm.hour;
tptr.tm_min  = tm.minute;
tptr.tm_sec  = tm.second;

tv.tv_sec = mktime(&tptr);
tv.tv_usec = 0;
settimeofday(&tv, NULL);

struct tm *timePassed;
time_t spentTime;
while(1)
{
sleep(10);
time(&spentTime);
timePassed = localtime(&spentTime);
tm.year = 1900+timePassed->tm_year;
tm.month = 1+timePassed->tm_mon;
tm.date = timePassed->tm_mday;
tm.hour = timePassed->tm_hour;
tm.minute  = timePassed->tm_min;
tm.second  = timePassed->tm_sec;
tm.weekday = 0;

ret = ioctl(fd, HI_RTC_SET_TIME, &tm);
if (ret < 0)
{
printf("ioctl: HI_RTC_SET_TIME failed\n");
}
}
return 0;
}

[/code]

关于Hi3516A的RTC问题，有点蹊跷

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