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Forum Posts

UART junk values

Posted on September 03, 2012 at 09:20Hello, I was using UART4 pin PA0 and PA1 for my project. I have done all the initialization procedures right but ended up getting junk values at the output. below is my initialization function. void UART_LowLevel...

vivek2 by Associate II
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Resolved! malloc library - _sbrk problem

Posted on September 02, 2012 at 00:47I was trying to use malloc in a project  which has been ported from an other platform. I get the message that... _sbrk  ... is undefined. This is used by _sbrk_r which again is used by malloc. I found no solution...

Zainka by Associate III
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I2C on STM32L Discovery

Posted on September 03, 2012 at 11:48Hi everyone, I'm new in the world of STM32. I want to run the STM32L Discovery as I2C slave by using the Standard Peripheral Library. Does anyone have a code example for me. #i2c

STM32F4 Bit Set Reset Register

Posted on August 31, 2012 at 12:09 The file stm32f4xx.h defines the BSRR as two 16 bit ''halves''. typedef struct { __IO uint32_t MODER; /*!< GPIO port mode register, Address offset: 0x00 */ __IO uint32_t OTYPER; /*!< GPIO port output...

John F. by Senior
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Simulating Alternate Function Input

Posted on October 26, 2011 at 20:27In the STM32 reference manual (Doc ID 13902 Rev 13) in section 9.1.4 it states:It is also possible to emulate the AFI input pin by software by programming the GPIO controller. In this case, the port should be confi...

SDIO Wide Bus Enable Issue

Posted on April 11, 2012 at 10:00In my diskio.c wrapper for fatfs file system i have now got the problem of not been able to enable 4bit wide bus on SDIO. Below is the functions i call in disk_initailse().errorstatus = SD_Init();errorstatus = SD_Get...