PSoC Development on Linux

PSoC from Cypress is a unique microcontroller for the flexibility of its peripherals.  The low-cost PSoC 5LP prototyping kit CY8CKIT-059 is particularly attractive with $10 price and built-in programmer and debugger KitProg.  The PSoC5 series has an ARM Cortex-M3 core, which is supported by the GNU compiler.  However, the develop environment Cypress PSoC Creator only runs on Windows.  My attempt to run PSoC Creator with wine was unsuccessful.  I can run PSoC Creator Windows virtual machine, in which the peripherals can be set up.  (The last version supported on Windows XP is 4.0.) Once the hardware is set up, the software development can be done in Linux.

One way to update the application software on Linux is to use a bootloader.  Cypress supplies a bootloader component, that can communicate over UART, I2C, and USB HID.

First we have to flash the bootloader itself; we can use OpenOCD, which has support for KitProg.   The Linux kernel detect KitProg (ID 04b4:f139) as a USB HID device and a serial port.

[ 1995.852252] usb 1-1.2.2: new full-speed USB device number 11 using ehci-pci
[ 1995.968208] usb 1-1.2.2: New USB device found, idVendor=04b4, idProduct=f139, bcdDevice= 2.11
[ 1995.968217] usb 1-1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=128
[ 1995.968222] usb 1-1.2.2: Product: Cypress KitProg
[ 1995.968227] usb 1-1.2.2: Manufacturer: Cypress Semiconductor
[ 1995.968231] usb 1-1.2.2: SerialNumber: 1016163201324400
[ 1995.970949] hid-generic 0003:04B4:F139.0003: hiddev0,hidraw1: USB HID v1.11 Device [Cypress Semiconductor Cypress KitProg] on usb-0000:00:1a.0-1.2.2/input0
[ 1996.015524] cdc_acm 1-1.2.2:1.2: ttyACM0: USB ACM device
[ 1996.017170] usbcore: registered new interface driver cdc_acm
[ 1996.017172] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters

After building openocd from the source, openocd detects KitProg,

./src/openocd -s ./tcl/ -c "interface kitprog" -f target/psoc5lp.cfg -c "targets"
Open On-Chip Debugger 0.10.0+dev-g9a363c9 (2020-02-09-14:02)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'swd'
cortex_m reset_config sysresetreq
    TargetName         Type       Endian TapName            State       
--  ------------------ ---------- ------ ------------------ ------------
 0* psoc5lp.cpu        cortex_m   little psoc5lp.cpu        unknown
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : KitProg v2.17
Info : Hardware version: 17
Info : VTARG = 4.755 V
Info : This adapter doesn't support configurable speed
Info : SWD DPIDR 0x2ba01477
Info : psoc5lp.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : Listening on port 3333 for gdb connections
Info : accepting 'telnet' connection on tcp/4444

To program the bootloader, 

../Cypress-OpenOCD/src/openocd -s ../Cypress-OpenOCD/tcl/ -c "interface kitprog; kitprog_init_acquire_psoc" -f target/psoc5lp.cfg -c "init; halt; program output/debug/Bootloader_USBUART.elf  verify reset exit"
Open On-Chip Debugger 0.10.0+dev-g9a363c9 (2020-02-09-14:02)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : only one transport option; autoselect 'swd'
cortex_m reset_config sysresetreq
Info : KitProg v2.17
Info : Hardware version: 17
Info : VTARG = 4.758 V
Info : This adapter doesn't support configurable speed
Info : SWD DPIDR 0x2ba01477
Info : psoc5lp.cpu: hardware has 6 breakpoints, 4 watchpoints
Info : psoc5lp.cpu: external reset detected
Info : Listening on port 3333 for gdb connections
target halted due to debug-request, current mode: Thread 
xPSR: 0x41000000 pc: 0x000004b8 msp: 0x20007fc8
target halted due to debug-request, current mode: Thread 
xPSR: 0x01000000 pc: 0x00000010 msp: 0x20008000
** Programming Started **
auto erase enabled
Info : Padding image section 0 at 0x00001869 with 3 bytes
Info : Flash write discontinued at 0x00001de0, next section at 0x0003ffc0
Warn : Adding extra erase range, 0x0003c000 .. 0x0003ffbf
Error: Writes must be row-aligned, got offset 0x0003ffc0
Error: error writing to flash at address 0x00000000 at offset 0x0003ffc0
** Programming Failed **
shutdown command invoked
Error: Sequence 2 not supported.

If the hex file is used, the error message is different,

** Programming Started **
auto erase enabled
Warn : no flash bank found for address 0x80000000
Warn : There is no erase operation for NV Latches
Error: failed erasing sectors 0 to 0
** Programming Failed **
shutdown command invoked
Error: Sequence 2 not supported.

 Despite of the error message, the programming of the bootloader seems to have succeeded.

The UART bootloader works with a Linux version of bootloader_host, cyhostboot, built around the source for Bootloader Host Tool provided by Cypress, available on Github.

../cypress_linux_tools/cyhostboot/cyhostboot -f output/debug/PSoC5ino.cyacd
Programing file output/debug/PSoC5ino.cyacd
Start programing on serial /dev/ttyACM0, baudrate 115200
no parity
Got silicon id 0x2e161069, rev 0x00
Progress: array_id 0, row_num 30
Progress: array_id 0, row_num 31

... 

Progress: array_id 0, row_num 149
Progress: array_id 3, row_num 255
programing OK !

It takes about 2 minutes to program about 30KB.