+ device_property_read_bool(&client->dev,"wakeup-source")) {+ device_init_wakeup(&client->dev,true); }/*check state of calendar information*/@@-563,9+554,8@@if(ret <0)returnret;- hym8563->valid = !(ret &HYM8563_SEC_VL); dev_dbg(&client->dev,"rtc information is %s\n",- ...
第8行,使用pcf8563_read_block_data函数从PCF8563_REG_ST1寄存器(地址为0X00)开始,连续读取9个寄存器的数据。这样就可以得到PCF8563的控制与状态寄存器1和2,以及事件与日期寄存器的值。 第12行,判断PCF8563的0X02寄存器VL位是否为1,也就是检查PCF8563是否处于低电压模式,事件和日期是否有效。 第28-34行,依次获取PCF8...
第12行，判断PCF8563的0X02寄存器VL位是否为1，也就是检查PCF8563是否处于低电压模式，事件和日期是否有效...
{ case RTC_VL_READ: ret = regmap_test_bits(pcf8563->regmap, PCF8563_REG_SC, PCF8563_SC_LV); if (ret < 0) return ret; return put_user(ret ? RTC_VL_DATA_INVALID : 0, (unsigned int __user *)arg); default: return -ENOIOCTLCMD; } } static int pcf8563_rtc_read_alarm(struct ...
if (ioctl(fd, RTC_VL_READ, &tmp) < 0) { if ((errno != EINVAL) && (errno != EINTR) && (errno != ENOTTY)) { ret = -errno; pr_fail("%s: ioctl RTC_VL_READ failed, errno=%d (%s)\n", args->name, errno, strerror(errno)); ...
/* log.c */ #include #include #include #include // 定义输出日志的函数,留白给运用者完成 extern void Ffmpeglog(int , char*); static void log_callback(void *avcl, int level, const char *fmt, va_list vl) { (void) avcl; char log[1024] = {0}; int n = vsnprintf(log, 1024, ...
Having a PCIe interface for the SSD means there is no VL805 chip and as a result, no USB 3.0 ports, only four USB 2.0 ports on the CM4 Maker Board. Let’s run sbc-bench benchmark scripts to check for potential issues: 1 2 3 4 5 6 7 8 9 10 11 12...
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read protection modes – 1 Kbyte of RAM SO8N (4.9 x 6 mm or 150 mils width) • DMA – 4 channels supporting ADC, SPI, I2C, USART, timers – 1 channel for memory-to-memory • 12-bit ADC up to 1 Msps/4 channels – Internal reference voltage • Timers – Two 16-bit timers ...
read protection modes – 1 Kbyte of RAM SO8N (4.9 x 6 mm or 150 mils width) • DMA – 4 channels supporting ADC, SPI, I2C, USART, timers – 1 channel for memory-to-memory • 12-bit ADC up to 1 Msps/4 channels – Internal reference voltage • Timers – Two 16-bit timers ...