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MCU Voltage Level vs USB FS

Posted on April 23, 2013 at 07:36Hi,My F4 MCU is running at 2.8V, but I need to use USB OTG FS peripheral.MCU is device mode (peripheral mode) and not bus powered, I only use vbus, for detect dm-dp signals entity.Data is bidirectionalVBus, DM,DPBut,...

auzgec by Associate II
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SPI Slave - Data received with errors

Posted on April 17, 2013 at 00:35I'm working with two STM32L151 communicating them via SPI port A-Master and B-Slave. I can only receive data correctly in B-Slave if I switch off transmission but I want full duplex in master and in slave. I can't ei...

friquero by Associate II
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Timers timing thorough explanation, please...

Posted on April 22, 2013 at 17:19Hi all, I know it was disscused many times over the forum but still I can't get the correct results for the timer setting in PWM mode... Can someone explain to me step by step how to understand timers timing, please?...

jamsoft by Associate II
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why winsock cannot get my UDP packet ?

Posted on December 28, 2012 at 15:01 #include ''stm32f4xx_conf.h'' #include ''ethernet.h'' #include <stdio.h> #include <string.h> //source IP #define S_IP1 192 #define S_IP2 168 #define S_IP3 1 #define S_IP4 100 //dest IP #define D_IP1 ...

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Issue with timer interrupt routines

Posted on April 14, 2013 at 12:25Hello all, I've run into the following problem with the program execution. On the STM32f4 Discovery board I've configured two timers with the IRQ routines for measuring two external PWM signals. This works excellentl...

jamsoft by Associate II
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  • 7 replies
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STM32F4 + EEPROM + I2C interrupts

Posted on April 22, 2013 at 16:17 Hi I am trying to read 4 consecutive registers from an EEPROM using I2C through interrupts. The Start Generation is done inside an EXTI interrupt handler after the user button is Pressed. The rest of the read...

Problem on my USART

Posted on April 19, 2013 at 10:13Hi everybody, I got a strange problem on my USART3 of my STM32F205VE. The UART is working perfectly up to 19200 bauds. With a terminal, I can see my sentences, with the oscilloscope my bit period is OK. I would like ...

Stm32F4 and JTAG

Posted on April 22, 2013 at 10:15Hello I have 3 units ulink2 , I am using keil .. when i was using v4.60 , i was able to debug and download using jtag .. I get some problem with that version later one we upgrade it to v4.70a ; now I cant use JTAG ,...

sami by Associate II
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usart and rs 232 problem

Posted on April 21, 2013 at 12:35 I have a problem ... I want to connect to the terminal via RS 232 converter usb .. code seems to be reasonable but still something is wrong, I can not send anything to the terminal please help. #include ''stm32...

teacha by Associate II
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  • 5 replies
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