SPI_IOC_RD_MODE, &mode) == -1 ||ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits) ==-1||// ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits) == -1 ||ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed) ==-1||// ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed) ==...
Therefore you can switch speed any time you like (as long as the master can handle it) and ...
Type: SDHC/SDXC Speed: 20.00 MHz (limit: 20.00 MHz) Size: 7382MB CSD: ver=2, sector_size=512, capacity=15118336 read_bl_len=9 SSR: bus_width=1 后面还输出了读写文件相应的信息。
If not set, this value is simply ignored,* and it's up to the individual driver to perform any validation.* @min_speed_hz: Lowest supported transfer speed* @max_speed_hz: Highest supported transfer speed* @flags: other constraints relevant to this driver* @slave: indicates that this is ...
I (2961) main_task: Returned from app_main() 可以看到输出了存储卡信息: Name: CS064 Type: SDHC/SDXC Speed: 20.00 MHz (limit: 20.00 MHz) Size: 7382MB CSD: ver=2, sector_size=512, capacity=15118336 read_bl_len=9 SSR: bus_width=1...
lcd_data_speed 用于设置spi/dbi接口时钟的速率,单位MHz。 发送端(SOC)的最大限制是100MHz。 接收端(屏Driver IC)的限制,请查看对应Driver IC手册或者询问屏厂支持。 超出以上限制都有可能导致显示异常。 lcd_fps 设置屏的刷新率,单位Hz。当lcd_dbi_te使能时,这个值设置无效。 lcd_pwm_used 是否使用pwm。 此...
不用写驱动程序自带坏块管理的NAND Flash(贴片式TF卡),尺寸小巧,简单易用,兼容性强,稳定可靠,固件可定制,LGA-8封装,标准SDIO接口,兼容SPI/SD接口,兼容各大MCU平台,可替代普通TF卡/SD卡,尺寸6x8mm毫米,内置SLC晶圆擦写寿命10万次,通过1万次随机掉电测试耐高低温,支持工业级温度-40°~+85°,机贴手贴都非常方...
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//---100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//---上拉 GPIO_Init(GPIOB, &GPIO_InitStructure);//---初始化 //配置引脚复用映射 GPIO_PinAFConfig(GPIOB, GPIO_PinSource3, GPIO_AF_SPI3); //PB3 复用为 SPI3 ...
SPI devices sometimes use another signal line to send an interrupt signal to a host CPU. Examples include pen-down interrupts from touchscreen sensors, thermal limit alerts from temperature sensors, alarms issued by real time clock chips, SDIO,[5] and headset jack insertions from the sound codec...
8x PLL selected)//#pragma config PLLMODE = PLL96DIV1#pragma config IESO = ON // Two-speed ...