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test write_ramp

This commit is contained in:
Florian Agbuya 2024-08-29 17:29:19 +08:00
parent 0927824c61
commit e7549b7392
1 changed files with 23 additions and 15 deletions
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38
fast-servo/pyfastservo/dac.py
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@ -124,6 +124,12 @@ def write_sample(channel, sample):
for addr, value in zip(addresses, values): for addr, value in zip(addresses, values):
write_to_memory(addr, value) write_to_memory(addr, value)
def write_ramp():
signal = [i for i in range(16384)]
for value in signal:
write_sample(0, value)
def configure_ad9117(): def configure_ad9117():
spi = spidev.SpiDev() spi = spidev.SpiDev()
@ -148,25 +154,27 @@ def configure_ad9117():
power_down(1, False) power_down(1, False)
manual_override(True) manual_override(True)
# Write sample value 0x1FFF to both channels write_ramp()
sample_value = 0x1FFF
write_sample(0, sample_value) # Write to channel 0
write_sample(1, sample_value) # Write to channel 1
print(f"Sample value 0x{sample_value:04X} written to both channels") # # Write sample value 0x1FFF to both channels
# sample_value = 0x1FFF
# write_sample(0, sample_value) # Write to channel 0
# write_sample(1, sample_value) # Write to channel 1
# Read back the values from memory # print(f"Sample value 0x{sample_value:04X} written to both channels")
ch0_high = read_from_memory(CH0_HIGH_WORD_ADDR, 1)[0]
ch0_low = read_from_memory(CH0_LOW_WORD_ADDR, 1)[0]
ch1_high = read_from_memory(CH1_HIGH_WORD_ADDR, 1)[0]
ch1_low = read_from_memory(CH1_LOW_WORD_ADDR, 1)[0]
# Reconstruct the 14-bit values # # Read back the values from memory
ch0_value = (ch0_high << 8) | ch0_low # ch0_high = read_from_memory(CH0_HIGH_WORD_ADDR, 1)[0]
ch1_value = (ch1_high << 8) | ch1_low # ch0_low = read_from_memory(CH0_LOW_WORD_ADDR, 1)[0]
# ch1_high = read_from_memory(CH1_HIGH_WORD_ADDR, 1)[0]
# ch1_low = read_from_memory(CH1_LOW_WORD_ADDR, 1)[0]
print(f"Read back value for channel 0: 0x{ch0_value:04X}") # # Reconstruct the 14-bit values
print(f"Read back value for channel 1: 0x{ch1_value:04X}") # ch0_value = (ch0_high << 8) | ch0_low
# ch1_value = (ch1_high << 8) | ch1_low
# print(f"Read back value for channel 0: 0x{ch0_value:04X}")
# print(f"Read back value for channel 1: 0x{ch1_value:04X}")
print("AD9117 configuration completed successfully") print("AD9117 configuration completed successfully")
return True return True