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soypat
62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
package main
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import (
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"fmt"
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"machine"
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"time"
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"tinygo.org/x/drivers/sd"
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)
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const (
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SPI_RX_PIN = machine.GP16
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SPI_TX_PIN = machine.GP19
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SPI_SCK_PIN = machine.GP18
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SPI_CS_PIN = machine.GP15
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)
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var (
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spibus = machine.SPI0
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spicfg = machine.SPIConfig{
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Frequency: 250000,
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Mode: 0,
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SCK: SPI_SCK_PIN,
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SDO: SPI_TX_PIN,
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SDI: SPI_RX_PIN,
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}
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)
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func main() {
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time.Sleep(time.Second)
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SPI_CS_PIN.Configure(machine.PinConfig{Mode: machine.PinOutput})
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err := spibus.Configure(spicfg)
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if err != nil {
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panic(err.Error())
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}
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sdcard := sd.NewSPICard(spibus, SPI_CS_PIN.Set)
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println("start init")
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err = sdcard.Init()
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if err != nil {
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panic("sd card init:" + err.Error())
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}
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// After initialization it's safe to increase SPI clock speed.
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csd := sdcard.CSD()
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kbps := csd.TransferSpeed().RateKilobits()
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spicfg.Frequency = uint32(kbps * 1000)
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err = spibus.Configure(spicfg)
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cid := sdcard.CID()
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fmt.Printf("name=%s\ncsd=\n%s\n", cid.ProductName(), csd.String())
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var buf [512]byte
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for i := 0; i < 11; i += 1 {
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err = sdcard.ReadBlocks(buf[:], int64(i))
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if err != nil {
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println("err reading block", i, ":", err.Error())
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continue
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}
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expectCRC := sd.CRC16(buf[:])
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fmt.Printf("block %d theircrc=%#x ourcrc=%#x:\n\t%#x\n", i, sdcard.LastReadCRC(), expectCRC, buf[:])
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}
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}
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