About taz1000

taz1000 · 2020-04-01

For educational purpose, I want to make a STM32F103 board.I'm going to design, make, and sell them. To use ST's reference project also, the nucleo schematic can be the best reference.If I make a STM32F103 board based on nucleo schematic (remove STLIN...

taz1000 · 2019-12-25

I'm running USB CDC in HS with STM32F405.Receiving data from PC is very good. But, sending data to PC has problem sometimes. To send data, I'm using CDC_Transmit_HS ( *Buf, Len )There is no error in the function at all. But, data is not sent to PC.To...

taz1000 · 2019-12-19

I'm implementing USB CDC for my project. In the USB callback function (CDC_Receive_HS), I copy the contents to a user's data array and exit the function. I process the received data in the main function. (not in USB interrupt routine)What I want to d...

taz1000 · 2019-02-23

I'm using STM32F401RB, which has an internal 128KB flash. IAP bootloader is using about 20KB. So, I set USER_APP's flash address to 0x08006000 (24KB)When I download the USER_APP hex file with STLINK UTIL or STM32CubeProgrammer, they erase the flash f...

taz1000 · 2019-02-12

I am generating a special signals with GPIO. It is unique protocol signal to communicate with other system.To make signal timing, I ran one of TIMER counter and check the value in a while loop.But, the problem is from USB connection. If I don't conn...

taz1000 · 2019-12-25

I had changed the MCU to STM32F4xx for higher performance and memory sizes. ( no change in HW , only MCU is changed.)After changing the MCU, I don't have the issue any more.

taz1000 · 2019-12-22

Great Thanks. As your comment, "moving USBD_CDC_ReceivePacket( ) into main routine" does what I want. if USBD_CDC_ReceivePacket( ) is not called in ISR (interrupt service routine), USBD_CDC OUT (from PC to MCU) is not activated (MCU responses with NA...

taz1000 · 2019-02-12

Thanks for your comment, In the current project, the function needs to work outside of interrupt service routine. But, in future, it can be one of solutions. Making a SW triggered interrupt and give it a proper interrupt level. Thanks ~!

taz1000 · 2019-02-12

Dear JW, STM32L412RBT is the one I'm using. I had tried as following, but it doesn't work. NVIC_DisableIRQ(OTG_FS_IRQn); NVIC_EnableIRQ(OTG_FS_IRQn);Would you teach me how to disable and enable USB interrupt on STM32L412RBT ? * It is good t...

taz1000 · 2019-02-07

All button input pins are configured to be input mode no pull-up, no pull-down

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User Activity

Making boards based on STM32F103 nucleo board and selling them .

USB CDC in HS with STM32F405, Issue in sending data to PC.

How to disable USB Receive (OUT) (response with NACK) for a while ?

USER_APP Flash start address=0x08006000, but STLINK erases the internal flash from 0x08004000

Can I disable USB interrupt for < 10us ? If can, how ?

Re: STM32L412RBT, IO damaged very easily?

Re: How to disable USB Receive (OUT) (response with NACK) for a while ?

Re: Can I disable USB interrupt for < 10us ? If can, how ?

Re: Can I disable USB interrupt for < 10us ? If can, how ?

Re: STM32L412RBT, IO damaged very easily?