焊好SD卡座之后:对应SD卡pin都接到MCU上了。卡座上另有CD引脚是检测卡插入的,卡插入后CD与GND连通。还有WP引脚是识别写保护开关用的,我没连它。 个人的DIY就是折腾,ST官方库已经有SDIO的函数了为何不用?重新发明轮子?我就喜欢这么干,不喜欢烦琐的一层层打包的库函数啊,直接写寄存器才好玩 先得知道这些信号都...
焊好SD卡座之后：对应SD卡pin都接到MCU上了。卡座上另有CD引脚是检测卡插⼊的，卡插⼊后CD与GND连通。还有WP引脚是识别写保护开关⽤的，我没连它。个⼈的DIY就是折腾，ST官⽅库已经有SDIO的函数了为何不⽤？重新发明轮⼦？我就喜欢这么⼲，不喜欢烦琐的⼀层层打包的库函数啊，直接写寄存器才...
焊好SD卡座之后:对应SD卡pin都接到MCU上了。卡座上另有CD引脚是检测卡插入的,卡插入后CD与GND连通。还有WP引脚是识别写保护开关用的,我没连它。 个人的DIY就是折腾,ST官方库已经有SDIO的函数了为何不用?重新发明轮子?我就喜欢这么干,不喜欢烦琐的一层层打包的库函数啊,直接写寄存器才好玩 先得知道这些信号都...
disable-wp; cap-sd-highspeed; cap-sdio-irq; keep-power-in-suspend; mmc-pwrseq = <&sdio_pwrseq>; non-removable; num-slots = <1>; pinctrl-names = "default"; pinctrl-0 = <&sdio0_bus4 &sdio0_cmd &sdio0_clk &sdio0_cd &sdio0_pwr >; sd-uhs-sdr104; ...
I would like to use the TXS0206A for my SDIO circuit, designed for voltage conversion between 1.8V and 3.3V for Wi-Fi applications. Is this possible? If yes, what do I need to look for in terms of design? Additionally, since there are no pins "WP" ...
Command, Clock, CD, WP, Pwr Ctrl (MIO or EMIO) LED control, bus voltage (EMIO) Interrupt or polling driven AHB master-slave interface operating at the CPU_1x clock rate Master mode for DMA transfers (with 1 KB FIFO) Slave mode for register accesses ...
Try to use broken-cd; to try to probe in polling if anytime it failed to probe. Have you gone through Porting Guide? Pull-Up (Not able to download schematic, but I suppose you have added external pull-ups) PCB : I assume you have PCB created with above external pull-ups (> 10 Ca...
am335x_mmc[1].gpio_cd = -EINVAL; am335x_mmc[1].gpio_wp = -EINVAL; am335x_mmc[1].ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34; /* 3V3 */ /* mmc will be initialized when mmc0_init is called */ printk("!!!mmc2_wifi_init!!!\n"); return; } //开启使能及供电...
am335x_mmc[1].gpio_cd = -EINVAL; am335x_mmc[1].gpio_wp = -EINVAL; am335x_mmc[1].ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34; /* 3V3 */ /* mmc will be initialized when mmc0_init is called */ return; } *** 注:这里有一个非常容易犯错的地方,这个项目中我们用的mmc总线...
[ 2.663394] sdhci-esdhc-imx 219c000.usdhc: Got CD GPIO [ 2.663409] sdhci-esdhc-imx 219c000.usdhc: Got WP GPIO [ 2.676496] sdhci: === REGISTER DUMP (mmc3) === [ 2.676503] sdhci: Sys addr: 0x00000000 | Version: 0x00000002 [ 2.676507] sdhci: Blk size: 0x00000200 | Blk cnt: 0x...