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soypat
96 lines
2.8 KiB
Go
96 lines
2.8 KiB
Go
package sd
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import (
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"encoding/hex"
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"testing"
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)
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func TestCRC16(t *testing.T) {
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tests := []struct {
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block string
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wantcrc uint16
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}{
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{
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block: "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",
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wantcrc: 0x52ce,
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},
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}
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for _, tt := range tests {
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b, err := hex.DecodeString(tt.block)
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if err != nil {
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t.Fatal(err)
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}
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gotcrc := CRC16(b)
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if gotcrc != tt.wantcrc {
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t.Errorf("calculateCRC(%s) = %#x, want %#x", tt.block, gotcrc, tt.wantcrc)
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}
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}
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}
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func TestCRC7(t *testing.T) {
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const cmdSendMask = 0x40
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tests := []struct {
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data []byte
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wantCRC uint8
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}{
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{ // See CRC7 Examples from section 4.5 of the SD Card Physical Layer Simplified Specification.
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data: []byte{cmdSendMask, 4: 0}, // CMD0, arg=0
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wantCRC: 0b1001010,
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},
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{
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data: []byte{cmdSendMask | 17, 4: 0}, // CMD17, arg=0
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wantCRC: 0b0101010,
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},
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{
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data: []byte{17, 3: 0b1001, 4: 0}, // Response of CMD17
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wantCRC: 0b0110011,
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},
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{ // CSD for a 8GB card.
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data: []byte{64, 14, 0, 50, 83, 89, 0, 0, 60, 1, 127, 128, 10, 64, 0},
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wantCRC: 0b1110010,
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},
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}
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for _, tt := range tests {
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gotcrc := CRC7(tt.data[:])
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if gotcrc != tt.wantCRC {
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t.Errorf("got crc=%#b, want=%#b for %#b", gotcrc, tt.wantCRC, tt.data)
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}
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}
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cmdTests := []struct {
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cmd command
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arg uint32
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wantCRC uint8
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}{
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{
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cmd: cmdGoIdleState,
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arg: 0,
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wantCRC: 0x95,
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},
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{
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cmd: cmdSendIfCond,
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arg: 0x1AA,
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wantCRC: 0x87,
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},
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}
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var dst [6]byte
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for _, test := range cmdTests {
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putCmd(dst[:], test.cmd, test.arg)
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gotcrc := dst[5]
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if gotcrc != test.wantCRC {
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t.Errorf("got crc=%#x, want=%#x", gotcrc, test.wantCRC)
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}
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}
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}
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func putCmd(dst []byte, cmd command, arg uint32) {
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dst[0] = byte(cmd) | (1 << 6)
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dst[1] = byte(arg >> 24)
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dst[2] = byte(arg >> 16)
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dst[3] = byte(arg >> 8)
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dst[4] = byte(arg)
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dst[5] = crc7noshift(dst[:5]) | 1 // Stop bit added.
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}
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