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by Pito
Wed Jan 18, 2017 12:30 pm
Forum: Generic STM32F103
Topic: STM32F103CB Dual SPI
Replies: 7
Views: 81

Re: STM32F103CB Dual SPI

Yes, you get 2xSPI, 2xI2C, 2xSerial - all could be used in your sketch at the same time..
by Pito
Wed Jan 18, 2017 12:18 pm
Forum: General discussion
Topic: STM32F103C8T6 - serial.print from setup()
Replies: 4
Views: 90

Re: STM32F103C8T6 - serial.print from setup()

Hi, 1) it is possible send string to serial (USB) from setup()? I try it but it doesn't working (it is working from loop() without any problem). And second question: is here any example for serial.read (read characters to array until enter key/character is not received but meanwhile I need using ot...
by Pito
Tue Jan 17, 2017 12:32 pm
Forum: Generic STM32F103
Topic: Execute from external SRAM
Replies: 144
Views: 1242

Re: Execute from external SRAM

EXRAM_VARIANTS_CLASSIC_V1.JPG
EXRAM_VARIANTS_CLASSIC_V1.JPG (65.17 KiB) Viewed 24 times

EXRAM_VARIANTS_V2_V3.JPG
EXRAM_VARIANTS_V2_V3.JPG (72.34 KiB) Viewed 24 times
by Pito
Mon Jan 16, 2017 9:49 am
Forum: Generic STM32F103
Topic: Execute from external SRAM
Replies: 144
Views: 1242

Re: Execute from external SRAM

Return from a running APP via a jump to reset back to xLOADER works as expected. In this session :) the Dhrystone runs 2x and then jumps back to xLOADER: ### Hello from xLOADER v1.03 ! ### Usage: help dir run APP.bin > dir Root dir: DATA.BMP STM_Dhrystone128.ino.bin STM_HelloToggle_fromEXRAM.ino.bin...
by Pito
Sun Jan 15, 2017 8:25 pm
Forum: Off topic
Topic: P-channel MOSFET for 3.3v logic.
Replies: 4
Views: 67

Re: P-channel MOSFET for 3.3v logic.

PS: I think it is not "off topic" but "Hardware" related :)
by Pito
Sun Jan 15, 2017 8:11 pm
Forum: Off topic
Topic: P-channel MOSFET for 3.3v logic.
Replies: 4
Views: 67

Re: P-channel MOSFET for 3.3v logic.

For 3.3V logic always look for a transistor with lowest Vt0 ( or "Vgs threshold voltage" or "Vgs(th)" ). The best are with Vgs(th)=0.9 to 1.5V (minus for pmos, plus for nmos). Above transistor seems to be ok, even the datasheet does not list the Vgs(th) explicitly, there is a pic...
by Pito
Sun Jan 15, 2017 1:36 pm
Forum: Generic STM32F103
Topic: Changing Timer1 frequency will effect UART ?
Replies: 6
Views: 99

Re: Changing Timer1 frequency will effect UART ?

The PA9 and PA10, has TIM1_CH2 and TIM1_CH3 attached

That is for PWM, isn't it?
by Pito
Sun Jan 15, 2017 9:52 am
Forum: Generic STM32F103
Topic: Execute from external SRAM
Replies: 144
Views: 1242

Re: Execute from external SRAM

A new Variant V3: 1. APP runs off the internal IRAM, and uses HEAP in EXRAM 2. xLOADER's ram is placed on top of IRAM 3. xLOADER runs as usual off the flash, and loads the APP into IRAM (0x20000000). You may see the VT addresses below point to the internal IRAM. Dhrystone and Mandelbrot 200x200, all...
by Pito
Sun Jan 15, 2017 8:46 am
Forum: STM32F4 Boards
Topic: f407vet6 & f407zet6
Replies: 36
Views: 1101

Re: f407vet6 & f407zet6

@stephen: Win7 64bit, USB Mass storage driver..
USB\VID_0483&PID_5720&REV_0200
by Pito
Sat Jan 14, 2017 7:18 pm
Forum: STM32F4 Boards
Topic: f407vet6 & f407zet6
Replies: 36
Views: 1101

Re: f407vet6 & f407zet6

FYI - I got the 407ZET6 board as per stephen's link in the first post. After connecting the USB it installed the driver e:automatically, and it is showing 2 new removable storages E: and K:, device description SD flash disk, manufacturer ALIENTEC :) Schematics and pcb: my revision is v3.0, and the s...

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