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Fix fe310 SPI read

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This commit is contained in:
Thomas Tromp
2021-03-12 16:05:14 -05:00
committed by Ron Evans
parent 0b44d0bcc5
commit 56bbc5bf6d
1 changed files with 4 additions and 2 deletions
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src/machine/machine_fe310.go
+4 -2
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@@ -174,11 +174,13 @@ func (spi SPI) Transfer(w byte) (byte, error) {
spi.Bus.TXDATA.Set(uint32(w))
// wait until receive has data
for spi.Bus.RXDATA.HasBits(sifive.QSPI_RXDATA_EMPTY) {
data := spi.Bus.RXDATA.Get()
for data&sifive.QSPI_RXDATA_EMPTY > 0 {
data = spi.Bus.RXDATA.Get()
}
// return data
return byte(spi.Bus.RXDATA.Get() & sifive.QSPI_RXDATA_DATA_Msk), nil
return byte(data), nil
}
// I2C on the FE310-G002.