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stm32f4 i2c pcf8574

Posted on June 29, 2013 at 14:22 Hi there, I got stuck on communicating with a PCF.. I know that i have the address right, because i connected the chip to my Arduino for testing. The program gets stuck onwhile(!I2C_CheckEven...

kenny__84 by • Associate II
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2 Pins interrupts

Posted on June 29, 2013 at 11:13Hi , I have the following initialisation ://ADXL interrupt port pin  AFIO->EXTICR[0] |= AFIO_EXTICR1_EXTI2_PD; EXTI->IMR |= EXTI_IMR_MR2; EXTI->RTSR = EXTI_RTSR_TR2; NVIC_EnableIRQ(EXTI2_IRQn); //user alert button PA...

raducara by • Associate II
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Can you explain this code to me please ?

Posted on June 28, 2013 at 21:28 Hello,  Could somebody please explain why the code below (AN4099) does configure alternate function 2 for TIM2 (capture/compare channel 2) and yet configured channel 1 as well as an interrupt source? If it is desire...

EXTI - High Latency on STM32F407

Posted on June 27, 2013 at 20:47Hi. I used one of the examples shipped with Discovery as a template for my code.  Basically, a GPIO input (PA0) is coupled to a function generator and every time an interrupt is detected, a different pin goes HI/LO to...

F4 and Code Protect

Posted on March 11, 2013 at 15:53I loaded data into ROM page 11.  I then changed from 1’s to 0’s from my running code.  So far so good.Now I want to prevent my code from being read via a debugger.I can set FLASH_OPTCR bits 8..15 to 0xBB in my co...

picguy2 by • Associate II
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Terminatre Unconnected Pins

Posted on June 28, 2013 at 12:511. What do of BOOT0 pin. Should be float, pull down or pull high.2. Pin PC13-15 hae limited function . I am not using them. Should I terminate the by making input pull high, or left them as default or output low.

RTC F207

Posted on June 28, 2013 at 10:10MCU: STM32 F207 VG We try to upgrade a device from STM32 F107 to F207. We are glad to use the ''old'' RTC and to have a simple 32bit counter with a free settable prescaler (our RTC works at 1024Hz). Now the ''new'' RT...

damh by • Associate II
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STM32F051C Alternate Function Register problem

Posted on June 28, 2013 at 11:12Hi Everyone! Sorry for interrupting all of you, but I have a problem. Next year I will graduate from my University as an Electrical Engineer (at least on paper I will be one). For my thesis I'm currently using an STM3...

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