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--- rv3032c7_pi [2025/02/01 05:16] – [Enable i2c] admin
+++ rv3032c7_pi [2025/02/01 05:21] (current) – [Install Requirements] admin
@@ Line 1: / Line 1: @@
 ====== Micro Crystal RV-3032-C7 on Raspberry Pi ======
+{{ ::rv-3032-c7_app-manual.pdf}}
+{{ ::rv-3032-c7_datasheet.pdf}}
 ===== Enable i2c =====
-in /boot/config.txt (or use ''raspi-config'')
+in ''/boot/config.txt'' (or use ''raspi-config'')
-<code>
+''dtparam=i2c_arm=on''
-dtparam=i2c_arm=on
-</code>
 reboot
 On a Pi5, also disable the onboard rtc:
-<code>
-dtparam=rtc=off
-</code>
+''dtparam=rtc=off''
 ===== Install Requirements =====
-<code>
-sudo apt-get install python-smbus i2c-tools
-</code>
+''sudo apt-get install python-smbus i2c-tools''
 ===== Confirm Presence =====
 <code>
@@ Line 63: / Line 61: @@
 </code>
+====== dmesg ======
+<code>
+$ sudo dmesg | grep rtc
+[    2.837650] rtc-rv3032 1-0051: registered as rtc0
+[    2.839127] rtc-rv3032 1-0051: setting system clock to 2025-02-01T05:17:05 UTC (1738387025)
+</code>
 ===== Disable Fake hwclock =====
@@ Line 104: / Line 108: @@
 <code>
-ds3231-i2c-1-68
+rpi_volt-isa-0000
-Adapter: bcm2835 (i2c@7e804000)
+Adapter: ISA adapter
-temp1:        +30.8°C
+in0:              N/A
 cpu_thermal-virtual-0
 Adapter: Virtual device
-temp1:        +48.9°C
+temp1:        +31.4°C
-</code>
-===== Directly =====
+rv3032-i2c-1-51
-<code>cat /sys/class/i2c-dev/i2c-1/device/1-0068/hwmon/hwmon2/temp1_input</code>
+Adapter: Synopsys DesignWare I2C adapter
+temp1:        +21.3°C
-===== Python =====
+rp1_adc-isa-0000
-<code>
+Adapter: ISA adapter
-import smbus
+in1:         950.00 mV
-import os
+in2:           2.39 V
+in3:           1.40 V
-bus = smbus.SMBus(1)
+in4:           1.43 V
-address = 0x68
+temp1:        +36.9°C
-os.system('sudo rmmod rtc_ds1307')
-def getTemp(address):
-   byte_tmsb = bus.read_byte_data(address,0x11)
-   byte_tlsb = bin(bus.read_byte_data(address,0x12))[2:].zfill(8)
-   return byte_tmsb+int(byte_tlsb[0])*2**(-1)+int(byte_tlsb[1])*2**(-2)
-#print getTemp(address)
-Celsius = getTemp(address)
-Fahrenheit = 9.0/5.0 * Celsius + 32
-print Fahrenheit, "*F /", Celsius, "*C"
-os.system('sudo modprobe rtc_ds1307')
 </code>
-Save as a .py file (e.g. ds3231_temp.py) and run with ''sudo python ds3231_temp.py''
+===== Directly =====
+<code>$cat /sys/class/i2c-dev/i2c-1/device/1-0051/hwmon/hwmon3/temp1_input
+</code>
-You may need to install ''python-smbus''.

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