Posted on July 12, 2018 at 22:23I'm developing a system that uses an STM32F4 with an eMMC from Micron. The issue I'm having is related to the voltage levels I'm seeing on the CMD line. When the STM32 is driving the line I see good 3.3V levels. Ho...
Posted on February 20, 2012 at 02:31
A bit stumped on what to try next. I'm working with an SD card (2GB). I'm using the SDIO interface. The initialization sequence is failing during the change to widebus operation. Specifically it's failing inF...
Posted on January 31, 2012 at 22:53
Here is my code block for setting up the EXTI for Port B pin 0:
void
VFD_Busy_EXTI_Init(
void
){
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitS...
Posted on January 31, 2012 at 06:01I'm using the SPI TXE interrupt. My ISR simply checks to see if there is anything more to transmit in the buffer. If there is, it sends it, moves the buffer pointer, and returns. If there isn't anything left to ...
Posted on January 26, 2012 at 18:17It would seem to me given the way the GPIO pins are mapped to EXTI lines, there is no way to use two pins that have the same GPIO pin number. For example, in my case I would like to use pins A8 and B8 as separate ...
Posted on July 13, 2018 at 01:063 weeks I've spent on this....sigh.... Looking more deeply at the hardware if found the entire power plane for the eMMC is not connected to power. The device was running parasitically from the data lines of the STM3...
Posted on July 12, 2018 at 22:32Oh I should add that I tried a second assembly with an ISSI part instead of Micron and the response/signal levels were identical.
Posted on June 09, 2013 at 18:35THANK YOU!!!!!!!!!!!!I cannot express the level of gratitude I have for you posting the above demo. I mean seriously. You went out of your way to put together a fairly complex piece of code and provided it free to a...
Posted on February 12, 2012 at 06:53Sigh... Can we at least try to act civil. Would you answer me like that face to face? ''Way to totally miss the point .... '' I have respected you and your answers for quite some time on here but when people act...
