About BitBanger46

BitBanger46 · 2020-05-05

I am trying to implement Ethernet capability using the LwIP middleware on a STM32F765 board with a LAN8742A PHY.I have observed that the firmware/hardware functions properly when receiving an ARP request.However, when the low_level_output routine (in...

BitBanger46 · 2020-04-07

I just installed the STM32CubeMX IDE and the packages for the STM32F7xx MCU. (I have used IDE's from IAR, Atmel and other sources for decades.) Unlike other IDE's, it appears that the current version of the STM32CubeMX does not contain any example ...

BitBanger46 · 2020-03-30

I am using a custom board which includes a uSD that is interfaced to a STM32F765 through the SDMMC1 pins. The clock rate is set to 48 MHz. I am using the stm32f7xx_hal_sd driver to read and write to an uSD card. I initialize the driver with a call t...

BitBanger46 · 2020-03-25

I am using the stm32f7xx_hal_rtc.c driver to initialize the RTC. I have configured the high speed clock source as the external crystal (HSE) and I have configured the low speed (32 KHz) clock source as the external crystal (LSE). Prior to calling the...

BitBanger46 · 2020-03-22

I insert a breakpoint in the source code by toggling it Ctrl+Shift+B. I view the breakpoint in the Breakpoints window. After startup, the program is halted at the first line of code. I then press F8 to start the program and execution blows through th...

BitBanger46 · 2020-05-05

The buffer for the ARP response is near the start of the SRAM1 internal RAM memory (starting at 0x2000 484C). I verified that the Ethernet MAC intersects the SRAM1 memory in the DMA support matrix. The buffer is aligned on a 4-byte basis. It seems...

BitBanger46 · 2020-04-08

Your answer was incredibly useful!! I was able to locate the examples with no problem. My only wish is that this valuable information would be more prominently displayed in the STMicroelectronics documentation for the demonstration/evaluation board...

BitBanger46 · 2020-03-31

After many hours of research and reviewing community posts, I determined that the problem was related to the speed of the SDMMC clock which was running at 48 MHz. By changing the clock divider (hsd1.Init.ClockDiv) from 0 to 3, the resulting SDMMC clo...

BitBanger46 · 2020-03-26

I added a line of code to the #define __HAL_RCC_LSE_CONFIG(__STATE__) macro in the stm32f7xx_hal_rcc.h header to set the RTCSEL_0 bit (to select the LSE (32 KHz.) external oscillator as the RTC clock source):/** * @brief Macro to configure the Exter...

BitBanger46 · 2020-03-26

Your advice was spot on!! I modified the stm32f7xx_hal_rcc.c driver to set the RTC clock select bits, verified that they were indeed being set and tested my RTC driver. It worked perfectly!!! Since the RTC is functioning correctly using the LSE as...

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User Activity

DMA fails to transmit Ethernet frame with STM32F765 board.

Unable to locate examples!!

RX overrun error when reading blocks from uSD card using HAL driver.

HAL RTC driver doesn't set RTC Clock Select bits in RCC_BDCR register.

Cannot get program to stop execution at breakpoint using ST-LINK V3 -or- Segger JLINK+.

Re: DMA fails to transmit Ethernet frame with STM32F765 board.

Re: Unable to locate examples!!

Re: RX overrun error when reading blocks from uSD card using HAL driver.

Re: HAL RTC driver doesn't set RTC Clock Select bits in RCC_BDCR register.

Re: HAL RTC driver doesn't set RTC Clock Select bits in RCC_BDCR register.