ronald.sutherland-
Serial Port with Pi Zero W
05/18/2019 at 19:07 • 0 commentsLinux icsp1 4.14.98+ #1200 Tue Feb 12 20:11:02 GMT 2019 armv6l
RTS and CTS handshake is only valid with uart0, so I need to use the Alt0 pin functions. Unfortunately, raspi-config cannot change the config file at this time.
sudo systemctl list-units hciuart sudo systemctl disable hciuart sudo nano /boot/config.txt
dtoverlay=pi3-disable-bt # Alt0 pin function dtoverlay=uart0,pin_func=4 # raspi-config can set enable_uart enable_uart=1
As the R-Pi Zero W boots up the D1 green LED is dimly lit. Once the overlay is applied D1 turns off, the R-Pi pin has 1.6V at power on and does sink some current. It is acceptable for this application, but that is not how the AVR's or PIC's that I have used power up.
I did a script so that I can push the bootload button (S1) and run the make bootload rule. I run that script after setting the working folder to the location with the make rule (e.g., change directory to the folder with Makefile).
Next I have a bootload rule in the RPUno i2c-debug application's Makefile.
bootload: avrdude -v -p $(MCU) -c arduino -P $(BOOTLOAD_PORT) -b 38400 -U flash:w:$(TARGET).hexThen ran this bootld.py script on the working folder with that Makefile.
https://github.com/epccs/Driver/tree/master/ICSP/Bootload
# build the hex file make # run script python ~/bin/bootld.py rsutherland dialout gpio spi rsutherland dialout gpio spi avrdude -v -p atmega328p -c arduino -P /dev/ttyAMA0 -b 38400 -U flash:w:I2c-debug.hex avrdude: Version 6.3-20171130 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "/etc/avrdude.conf" User configuration file is "/home/rsutherland/.avrduderc" User configuration file does not exist or is not a regular file, skipping Using Port : /dev/ttyAMA0 Using Programmer : arduino Overriding Baud Rate : 38400 AVR Part : ATmega328P Chip Erase delay : 9000 us PAGEL : PD7 BS2 : PC2 RESET disposition : dedicated RETRY pulse : SCK serial program mode : yes parallel program mode : yes Timeout : 200 StabDelay : 100 CmdexeDelay : 25 SyncLoops : 32 ByteDelay : 0 PollIndex : 3 PollValue : 0x53 Memory Detail : Block Poll Page Polled Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- --------- eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00 Programmer Type : Arduino Description : Arduino Hardware Version: 3 Firmware Version: 6.2 Vtarget : 0.3 V Varef : 0.3 V Oscillator : 28.800 kHz SCK period : 3.3 us avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.00s avrdude: Device signature = 0x1e950f (probably m328p) avrdude: safemode: lfuse reads as 0 avrdude: safemode: hfuse reads as 0 avrdude: safemode: efuse reads as 0 avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed To disable this feature, specify the -D option. avrdude: erasing chip avrdude: reading input file "I2c-debug.hex" avrdude: input file I2c-debug.hex auto detected as Intel Hex avrdude: writing flash (8692 bytes): Writing | ################################################## | 100% 3.28s avrdude: 8692 bytes of flash written avrdude: verifying flash memory against I2c-debug.hex: avrdude: load data flash data from input file I2c-debug.hex: avrdude: input file I2c-debug.hex auto detected as Intel Hex avrdude: input file I2c-debug.hex contains 8692 bytes avrdude: reading on-chip flash data: Reading | ################################################## | 100% 2.69s avrdude: verifying ... avrdude: 8692 bytes of flash verified avrdude: safemode: lfuse reads as 0 avrdude: safemode: hfuse reads as 0 avrdude: safemode: efuse reads as 0 avrdude: safemode: Fuses OK (E:00, H:00, L:00) avrdude done. Thank you. icsp_pin falling event occured so use_icsp_pin_to_stop flag cleared press bootload_pin again to end program make clean![ICSPbootloadingRPUno]( "^2 ICSP bootloading RPUno")
I am impressed with how easy it was to automate this; the toil of tracking hex files was what I have seen and was expecting based on that experience, but going from source in the repository to binary upload all within the tool is satisfying.
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ICSP over SPI with Pi Zero W
05/18/2019 at 19:03 • 0 commentsLets do a loopback test for SPI, so short MISO to MOSI and power VCC with 5V.
sudo usermod -a -G spi rsutherland mkdir spiLoopBack cd spiLoopBack wget https://raw.githubusercontent.com/epccs/RPUno/master/SpiSlv/spidev_test.c gcc -o spidev_test spidev_test.c ./spidev_test -s 1000 -D /dev/spidev0.0 ./spidev_test -s 10000 -D /dev/spidev0.0 ./spidev_test -s 100000 -D /dev/spidev0.0 ./spidev_test -s 250000 -D /dev/spidev0.0 ./spidev_test -s 500000 -D /dev/spidev0.0 ./spidev_test -s 1000000 -D /dev/spidev0.0 ./spidev_test -s 2000000 -D /dev/spidev0.0
The test output
spi mode: 0 bits per word: 8 max speed: 500000 Hz (500 KHz) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Those should not be zeros. I connected the R-Pi to node MIS0 (note the zero) and the buffer to MISO. After some rework it is passing the loopback test.
spi mode: 0 bits per word: 8 max speed: 500000 Hz (500 KHz) FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF DE AD BE EF BA AD F0 0D
Next I have added a linuxspi rule in the RPUpi Remote application's Makefile. I used sudo because of an issue with permissions.
linuxspi: sudo avrdude -v -p $(MCU) -C +$(LIBDIR)/avrdude/328pb.conf -c linuxspi -P /dev/spidev0.0 -e -U flash:w:$(TARGET).hex -U lock:w:0xef:m
Ran this icsp.py script on the working folder with that Makefile.
https://github.com/epccs/Driver/tree/master/ICSP/Icsp
python ~/bin/icsp.py rsutherland dialout gpio spi rsutherland dialout gpio spi sudo avrdude -v -p atmega328pb -C +../lib/avrdude/328pb.conf -c linuxspi -P /dev/spidev0.0 -e -U flash:w:Remote.hex -U lock:w:0xef:m avrdude: Version 6.3-20171130 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "/etc/avrdude.conf" User configuration file is "/root/.avrduderc" User configuration file does not exist or is not a regular file, skipping Additional configuration file is "../lib/avrdude/328pb.conf" avrdude: warning at ../lib/avrdude/328pb.conf:4: part m328pb overwrites previous definition /etc/avrdude.conf:8573. Using Port : /dev/spidev0.0 Using Programmer : linuxspi AVR Part : ATmega328PB Chip Erase delay : 9000 us PAGEL : PD7 BS2 : PC2 RESET disposition : dedicated RETRY pulse : SCK serial program mode : yes parallel program mode : yes Timeout : 200 StabDelay : 100 CmdexeDelay : 25 SyncLoops : 32 ByteDelay : 0 PollIndex : 3 PollValue : 0x53 Memory Detail : Block Poll Page Polled Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- --------- eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00 efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00 Programmer Type : linuxspi Description : Use Linux SPI device in /dev/spidev* avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.00s avrdude: Device signature = 0x1e9516 (probably m328pb) avrdude: safemode: lfuse reads as FF avrdude: safemode: hfuse reads as D6 avrdude: safemode: efuse reads as FD avrdude: erasing chip avrdude: reading input file "Remote.hex" avrdude: input file Remote.hex auto detected as Intel Hex avrdude: writing flash (5792 bytes): Writing | ################################################## | 100% 1.60s avrdude: 5792 bytes of flash written avrdude: verifying flash memory against Remote.hex: avrdude: load data flash data from input file Remote.hex: avrdude: input file Remote.hex auto detected as Intel Hex avrdude: input file Remote.hex contains 5792 bytes avrdude: reading on-chip flash data: Reading | ################################################## | 100% 1.34s avrdude: verifying ... avrdude: 5792 bytes of flash verified avrdude: reading input file "0xef" avrdude: writing lock (1 bytes): Writing | ################################################## | 100% 0.01s avrdude: 1 bytes of lock written avrdude: verifying lock memory against 0xef: avrdude: load data lock data from input file 0xef: avrdude: input file 0xef contains 1 bytes avrdude: reading on-chip lock data: Reading | ################################################## | 100% 0.00s avrdude: verifying ... avrdude: 1 bytes of lock verified avrdude: safemode: lfuse reads as FF avrdude: safemode: hfuse reads as D6 avrdude: safemode: efuse reads as FD avrdude: safemode: Fuses OK (E:FD, H:D6, L:FF) avrdude done. Thank you. icsp_pin falling event occured so use_bootload_pin_to_stop flag cleared press icsp_pin again to end programThat was fast, that was the fastest I have seen anything go.
![ICSPwithMisoHackRPUpi]( "ICSPwithMisoHack RPUpi linuxspi")
ICSP
Pi Zero as a host to do In-Circuit Serial Programming of AVR’s
