mirror of https://github.com/m-labs/artiq.git
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
import unittest
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from artiq.experiment import *
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from artiq.test.hardware_testbench import ExperimentCase
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from artiq.language.core import (kernel, delay_mu, delay)
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from artiq.language.units import us
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from artiq.coredevice import spi2 as spi
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_SDCARD_SPI_CONFIG = (0*spi.SPI_OFFLINE | 0*spi.SPI_END |
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0*spi.SPI_INPUT | 0*spi.SPI_CS_POLARITY |
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0*spi.SPI_CLK_POLARITY | 0*spi.SPI_CLK_PHASE |
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0*spi.SPI_LSB_FIRST | 0*spi.SPI_HALF_DUPLEX)
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class CardTest(EnvExperiment):
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def build(self):
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self.setattr_device("core")
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self.setattr_device("spi_mmc")
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@kernel
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def run(self):
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self.core.reset()
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delay(1*ms)
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freq = 1*MHz
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cs = 1
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# run a couple of clock cycles with miso high to wake up the card
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG, 32, freq, 0)
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for i in range(10):
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self.spi_mmc.write(0xffffffff)
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG | spi.SPI_END, 32, freq, 0)
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self.spi_mmc.write(0xffffffff)
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delay(200*us)
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG, 8, freq, cs)
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self.spi_mmc.write(0x40 << 24) # CMD
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG, 32, freq, cs)
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self.spi_mmc.write(0x00000000) # ARG
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG, 8, freq, cs)
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self.spi_mmc.write(0x95 << 24) # CRC
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG | spi.SPI_INPUT, 8, freq, cs)
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idle = False
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response = 0
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for i in range(8):
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self.spi_mmc.write(0xff << 24) # NCR
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response = self.spi_mmc.read()
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delay(100*us)
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if response == 0x01:
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idle = True
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break
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self.spi_mmc.set_config(_SDCARD_SPI_CONFIG | spi.SPI_END, 8, freq, cs)
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self.spi_mmc.write(0xff << 24)
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if not idle:
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print(response)
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raise ValueError("SD Card did not reply with IDLE")
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class SDTest(ExperimentCase):
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def test(self):
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self.execute(CardTest)
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