About zhiyongwoo

zhiyongwoo · 2020-07-07

Similar question found in the previous post: https://community.st.com/s/question/0D50X00009XkbEZSAZ/uart-multiprocessor-communication?t=1594178292764In the post, it did mentions about supporting Broadcast Message and Specific Address Message but it d...

zhiyongwoo · 2020-06-24

Hi,My application is to copy the content (32-bit Data) in the Memory to PORT ODR each time it detects a Falling Edge. I use DMA1 from TIMER CCP pin. The problem I have is, DMA1 will stop as soon as it complete the transfer and require to re-enabling ...

zhiyongwoo · 2020-06-23

Hi All,I am trying to set a few GPIO speed to High Speed but I was struct when PC13-15 are only able to set to Low Speed. May I know is this the STM32CubeMx bugs?Or it is the STM32F446RE limitation? Please help.Many Thanks

zhiyongwoo · 2020-05-17

Hi Experts,May I know is there any speed different between access direct to Peripheral Register like, GPIOx_IDR? with access directly to SRAM ( using DMA to do Peripheral to Memory)?From this block diagram, the GPIOx_IDR is using AHB1 bus and it runs...

zhiyongwoo · 2020-05-14

Dear Experts,Can I configure the DMA2 to do say 3 repeats read on GPIOx_IDR by a single DMA request? I do not want to have array of bytes instead I would like to write into a single variable and overriding it with the latest value.I have set the MINC...

zhiyongwoo · 2020-06-24

Okay, I think I found out why it stopped. From the SFR debug Window, I found out an Error Transfer and I think that is why it make it stop.BTW, I am able to use DMA2 for USART TX and they are working perfectly fine. So I think the lib is okay or at l...

zhiyongwoo · 2020-06-23

Section 5.1.12 (Power Supplies). In the NUCLEO-64, PC13 is use to read User Button and PC14 and PC15 is connected to OSC32 crystal. So I think due to the RTC HW configuration, it is restricted to run at a lower Clock Speed. I think 2 MHz still okay f...

zhiyongwoo · 2020-05-17

My main concern here is, I do not want to wait for any delay to read the GPIOx IDR value. That is why I was thinking to use DMA to do the P2M transfer while I have my code running in "Parallel". But do I have latency delay when accessing to variable ...

zhiyongwoo · 2020-05-14

I am using 32F429ZI. Does it has the module you mention?

zhiyongwoo · 2020-05-14

I was inspired by how the DMA for UART Tx is and the ADC. They can do multiple transfer per request. BTW, I am using TIM Chn2 to detect a falling edge, this generates a DMA request.

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RS485 UART multiprocessor communication to match 2 addresses (Broadcast & Unicast)

How to enable DMA to run continuously without re-enabling it.

GPIO High-Speed Option - Not Available on PC13-15

Speed different when accessing Peripheral Register (i.e. GPIOx_IDR) vs using DMA to copy GPIOx_IDR to SRAM?

Multiple read from Peripheral to Memory using DMA

Re: How to enable DMA to run continuously without re-enabling it.

Re: GPIO High-Speed Option - Not Available on PC13-15

Re: Speed different when accessing Peripheral Register (i.e. GPIOx_IDR) vs using DMA to copy GPIOx_IDR to SRAM?

Re: Multiple read from Peripheral to Memory using DMA

Re: Multiple read from Peripheral to Memory using DMA