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-1

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– SPI Loopback test (1/2/3 bytes) ADS1256 needs send/receive two and three bytes. So I have also tested the 1/2/3 bytes loopback version. # spi_loopback_123_v70_2019jun0901 tlfong01 2019jun09hkt2302 … – Write Register and Read Register Appendix K – Status Register 0x00 Appendix L – SPI Loopback test (before testing ADS1256) Now I am doing a SPI loopback test as a preparation to read and …
answered Jun 8 by tlfong01

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test and found both SPI channels can loop back. The config.txt changes, “$ ls -l /dev/spi*” output and loopback sample outputs are also included in the program listing. I also attach the SPI 2 … pinout for your reference. # spi_loopback_onebyte_v44_2019may3001 tlfong01 2019may30hkt1958 *** # Rpi3B+ stretch 2019apr08, IDLE python 3.5.3 # Test – loopBackTest – SPI port send and receive one …
answered May 30 by tlfong01

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Test Program # Program – spi_test_v1312_2019jul0301 tlfong01 2019jul03hkt1027 # Config – Rpi3B+ raspberrypi 4.19.42-v7+, IDLE python 3.5.3 # Function – (1) SPI loopback 1/2/3 bytes, (2) SPI … )) return # *** SPI Write/Read/Loopback 1/2/3 Bytes *** # *** SPI Send/Receive 1/2/3 Bytes *** def spiSendRecvOneByte(spiPort, sendByte): sendByteArray = [sendByte] recvByteArray …
answered Jul 3 by tlfong01

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Python Program Example AdaFruit PiTFT Plus Assembled 320×240 2.8″ TFT + Resistive Touchscreen $35 https://www.adafruit.com/product/2298 [SPI Loopback test] How to check if SPI is enabled and functional … > GPIO only displays [not used for SPI mode tlfong01 2019may18] db00-15 – Databus cs – Chip Select wr – Write strobe fbtft_device have default values for these pin names (a few …
answered May 14 by tlfong01

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link will find new program versions updated int eh PenZu diary. Now is version 09. mcp3208 SPI ADT Test Program Version 09 – tlfong01 2019may03hkt1108 Update 2019may03hkt1531 I checked my urine … = 0.06V Percentage difference = 0.06V 0.06V / 5V (input range) = 1.2% 1 / 256 (8-bit) = 0.4% So I am thinking of using another ADC. I am considering MCP3008 and MCP3201. SPI MCP3201 …
answered Apr 18 by tlfong01
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0

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made a summary for you to compare and contrast your installation. You can also read the full installation record in Reference 2 below: Circuit Python and Blinka Installation Summary pi@tlfong01 … :~ $ date Sun 03 Nov 2019 09:51:49 AM HKT pi@tlfong01:~ $ uname -a Linux tlfong01 4.19.75-v7l+ #1270 SMP Tue Sep 24 18:51:41 BST 2019 armv7l GNU/Linux pi@tlfong01:~ $ sudo apt-get update …
answered Nov 3 by tlfong01

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Test Program # Program – spi_test_v1312_2019jul0301 tlfong01 2019jul03hkt1027 # Config – Rpi3B+ raspberrypi 4.19.42-v7+, IDLE python 3.5.3 # Function – (1) SPI loopback 1/2/3 bytes, (2) SPI … () # *** End of Program *** ”’ Sample ouput tlfong01 2019jun12 RESTART: /home/pi/Python Programs/test1301/spi/spi_test_v1308_2019jun1201.py Begin loopbackOneByteSpiPort00(),… Begin …
answered Jul 3 by tlfong01

5

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> GPIO only displays [not used for SPI mode tlfong01 2019may18] db00-15 – Databus cs – Chip Select wr – Write strobe fbtft_device have default values for these pin names (a few … Question ILI9341 SPI 2.8″ Touch TFT LCD Arduino Shield Rpi3B+ OK? How to connect? Short Answer (S1) Yes, it is OK to use the ILI9341 Arduino Shield for Rpi. The following is the …
answered May 14 by tlfong01

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pinout for your reference. # spi_loopback_onebyte_v44_2019may3001 tlfong01 2019may30hkt1958 *** # Rpi3B+ stretch 2019apr08, IDLE python 3.5.3 # Test – loopBackTest – SPI port send and receive one … Question Trying to use two SPI busses on RpiZW Put a line on /boot/config.txt to enable it “dtoverlay=spi1-3cs” Nothing works Answer I googled and found that it is as easy as you …
answered May 30 by tlfong01

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write ADS1256 ADC registers. # spi_loopback_50_2019jun0901 tlfong01 2019jun09hkt2153 *** # Rpi3B+ stretch 2019apr08, python 3.5.3 # Test – loopBackTest – SPI port send and receive one byte/two … – SPI Loopback test (1/2/3 bytes) ADS1256 needs send/receive two and three bytes. So I have also tested the 1/2/3 bytes loopback version. # spi_loopback_123_v70_2019jun0901 tlfong01 2019jun09hkt2302 …
answered Jun 8 by tlfong01

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UART Discussions Raspberry Pi Serial (UART) Tutorial SC16IS750 Single UART with I2C-bus/SPI interface – NXP NXP SC16IS750 I2C/SPI to UART Module Not Recommended for Newbies – tlfong01 2019apr19 … SC16IS750 I2C/SPI to UART module. Then you can have as many UART channels as you have SC16IS750s. But this chip is difficult for newbies (See my comments at the end of the references below). Or you can …
answered May 9 by tlfong01

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program below and run it to see how I don’t need to set input/output mode but still can do loopback. You might also like to refer to my answer to the following question. How to check if SPI is enabled and … functional on Raspi 3b+? Update 2019may01hkt1519 And how come your program takes care of MISO but forgets MOSI? Update 2019may03hkt1146 Now that we have checked that the Rpi SPI can do loopback …
answered May 1 by tlfong01

2

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# *** l298n_test04_ tlfong01 2019apr01hkt1627 *** import RPi.GPIO as GPIO from   time import sleep # *** Description *** # Move motor one direction, then reverse direction. # *** Notes *** # Only motor … 1 tested # *** Config *** enablePin1 =  11 # (SPI SCL) inPin11     = 10 # (SPI MOSI) inPin12     =  9 # (SPI MISO) motorPinList1 = [enablePin1, inPin11, inPin12] motorPinList2 = [enablePin1 …
answered Apr 1 by tlfong01

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. – @glenneroo Apr 24 at 20:49 # spi_test05 tlfong01 2019apr07hkt2043 *** # Computer = Rpi3B+ # Linux = $ hostnamectl = raspberrypi Raspbian GNU/Linux 9 (stretch) Linux 4.14.34-v7+ arm # Python … = >>> sys.version = 3.5.3 Jan 19 2017 # Test 1 – repeatSendByte() – SPI port repeatedly send out single bytes. # Function – Repeat many times sending a byte, pause after each byte. # Test 2 …
answered Apr 24 by tlfong01

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You might like to try my little test program, under GUI Desktop IDLE python. Or run under terminal mode with sudo. # spi_test05 tlfong01 2019apr07hkt2043 *** # Computer = Rpi3B+ # Linux …    = $ hostnamectl = raspberrypi Raspbian GNU/Linux 9 (stretch) Linux 4.14.34-v7+ arm  # Python   = >>> sys.version = 3.5.3 Jan 19 2017 # Test 1   – repeatSendByte() – SPI port repeatedly send out …
answered Apr 7 by tlfong01

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for Arduino 2.7-5.5 V High Precision – US$4 MCP3424 Schematic MCP3424 Datasheet – Microchip ADS1256 SPI 24 bit ΔΣ ADC Engineering Experimention Notes – tlfong01 Sending I2C-bus signals via long …
answered Jun 12 by tlfong01

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of home automation projects using sensors (temperature, humidity, pressure etc) and actuators (relays and solenoid, and motor etc). I mainly use I2C, SPI, and UART. My basic project development … Pins TxD, RdX ) Communication Not Working (D) Rpi Serial Testing Functions – tlfong01 2019oct03hkt2147 .END of Answer …
answered Oct 3 by tlfong01

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link will find new program versions updated int eh PenZu diary. Now is version 09. mcp3208 SPI ADT Test Program Version 09 – tlfong01 2019may03hkt1108 Update 2019may03hkt1531 I checked my urine … = 0.06V Percentage difference = 0.06V 0.06V / 5V (input range) = 1.2% 1 / 256 (8-bit) = 0.4% So I am thinking of using another ADC. I am considering MCP3008 and MCP3201. SPI MCP3201 …
answered Apr 18 by tlfong01

-2

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frequency: 4.6 +/- 0.5 KHz Resonant impedance (ohms): 300 max Plate material: Brass Great for: Acoustic Instrument Pickups, Stomp Boxes, Contact Mics, etc… (2) MCP3008 SPI 8 … Imgur for help. Another good thing is that the RpiSO CircuitLab account tlfong01 is automatically created for me. So next time I came back and found my pictures ready for more “final” strokes! One …
answered Sep 23 by tlfong01

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be beyond your and my budget. I’m looking for either sensors that connect to the raspberry via usb or through the I2C, but with a max current rating of around 10A. There are many I2C/SPI ADC … chips and cheap breakout boards/modules using SPI or I2C, which Rpi can handle. But communication using USB is a bit complex for Rpi. I once tried SPI ADC and found no problems. Now I am thinking …
answered Mar 22 by tlfong01

0

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means it is NOT Rpi compatible. The chip PCF8574 is very likely Vcc = 5V. I am pretty sure, because I never apply Vcc = 3V3 for the LCD and all the other I2C SPI guys. I am not suggesting you to use … notes – tlfong01 2019apr09 GPIO Spec and Electronic design checklist Everything You Want to Know About Raspberry Pi GPIO: But Were Afraid to Ask Understanding GPIO Outputs (Current Limits) GPIO …
answered Apr 26 by tlfong01

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