Part Number: TSER953
Other Parts Discussed in Thread: TDES954
def ti954_init_serdes(self):
"""Initialize SerDes configuration"""
try:
# Reset deserializer digital block
self.deser_regmap.write(TI954_RESET, 0x03)
time.sleep(2.0) # 2000ms delay
# Write Enable for RX port 0 registers
self.deser_regmap.write(0x4C, 0x03)
# Enable I2C Pass-Through, BC = 50Mbps
self.deser_regmap.write(0x58, 0x5E)
# Set Alias for AR1044 Camera
self.deser_regmap.write(0x5D, 0x20)
self.deser_regmap.write(0x65, 0x20)
# Enable CSI output
self.deser_regmap.write(0x32, 0x01)
# Enable CSI output with non-continuous clock, 2 lanes
self.deser_regmap.write(0x33, 0x21)
# Forwarding enabled for RX Port 0
self.deser_regmap.write(0x20, 0x20)
# Read and log RX_PORT_STS1
val = self.deser_regmap.read(TI954_RX_PORT_STS1)
self.logger.info(f"954 RX_PORT_STS1: 0x{val:02x}")
# Set SerAlias address
self.deser_regmap.write(TI954_SLAVE_ID0, self.ser_alias_addr << 1)
# Read and log serializer GENERAL_STATUS
val = self.ser_regmap.read(TI953_GENERAL_STATUS)
self.logger.info(f"953 GENERAL_STATUS: 0x{val:02x}")
# Configure serializer: 2 lanes, CRC enable, 1.8V I2C
self.ser_regmap.write(0x02, 0x13)
return 0
except Exception as e:
self.logger.error(f"Error in ti954_init_serdes: {e}")
return -1
def ti954_init_gpio_hw(self):
"""Initialize GPIO hardware configuration"""
try:
# Initialize GPIO 0 hardware
# Enable output for GPIO4
self.deser_regmap.write(0x0F, 0x6F)
# Set output source of DES GPIO4 to be GPIO2 on the serializer at RX Port 0
self.deser_regmap.write(0x14, 0x41)
# Configure all GPIOs from Ser to be remote from Deser
self.ser_regmap.write(0x0D, 0xF0)
# Set GPIO1 and 3 Direction Output
self.ser_regmap.write(0x0E, 0xA5)
# Commented out alternative configuration:
# self.ser_regmap.write(0x0E, 0x2D)
self.ser_regmap.write(0x33, 0x07)
# Commented out placeholder configurations:
# self.deser_regmap.write(0x10, 0x6F) # GPIO 1 enable
# self.deser_regmap.write(0x15, 0x41) # GPIO 1 source
# Initialize both GPIO states to LOW
self.gpio_state[0] = 0
self.gpio_state[1] = 0
return 0
except Exception as e:
self.logger.error(f"Error in ti954_init_gpio_hw: {e}")
return -1
the python code is the initilization for serdes, but we want one of the gpio outputs on the serializer to output a pwm signal to control LED brightness, is there a configuration that allows pwm duty cycle control, the frequency is not too important.
