2022-12-08 03:39 PM
Hello, I am working on the project from scratch. I would like to know what are the minimum connections I will need for the STM32F429VIT6 in order to program? I have segger J-Link which I will be using. so far I have connect SWCLK (Pin 76), SWDIO (Pin 72), TDI (Pin 77), NJTRST (pin 90), and Vref 3.3V (Pin 75) and VSS (GND) (Pin 74). Is that the bare minimum connection I will need to connect the board and start programming? I did check the Datasheet, Ref manual and programming guide but I am not 100% sure. I am getting an error.
2022-12-09 10:16 AM
SWD requires SWDIO+SWCLK+GND. J-Link supports SWD, I'd try that.
2022-12-09 10:54 AM
yes, i do same, just using stlink2 .
minimum to connect is: SWDIO+SWCLK+GND - as tdk said.
+ RST , if using it by j-link.
and all power pins vss, vdd, vdda must be used, with some cer.caps.
ah..
+ in debug config. -> select SWD + "software system reset" ! ( <- for stlink )
2022-12-09 11:45 AM
Hello TDK and AScha.3 I tried the SWD setting and connected SWDIO+SWCLK+GND but still no luck. can you please guide what are the minimum connections like VDD, VSS, Vcap1, Vcap2, etc?
Please see the attached pinouts. I am having a hunch that I am not biasing properly. Because the error message says "Could not connect to target. Please check power, connection and settings.".
2022-12-09 12:17 PM
2022-12-09 12:20 PM
There is no custom board it is pretty much like extension board for LQFP100 pinouts. pretty much like breadboard. Do I need to connect all the VDD and VSS of the board to +3.3V and GND? I want to know what are the minimum pinouts I have to connect in order to bias properly? I used 100nf caps for Vcap1 and Vcap2 and connected to the ground.
2022-12-09 12:23 PM
>like VDD, VSS, Vcap1, Vcap2, .. all of these, and correct cer.caps on vdd, vcapx .
i told you: ALL power pins !
+
boot0 to GND
, on RST a 10..100nf cap
+
see as reference : the circuit of a discovery board.
2022-12-09 01:03 PM
Sure sounds like a custom board to me.
There are a variety of sources to get this info. Datasheet, ST board schematic, or the stm32f4 hardware guide.
2022-12-09 01:32 PM
VCAP1 VCAP2 need bulk capacitance, so likely 2u2 each, or bonded together with one 4u7
Aren't there power/wiring diagrams in the Data Sheet?
2022-12-09 01:33 PM
Sounds like tacking flying wires to a handful of pins to me.