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I2S standards - strange values

Posted on August 12, 2013 at 20:14 Hi I am using the I2S bus to transfer audio samples from an audio codec module to the microprocessor. There are several standards for I2S like Phillips, MSB, LSB or PCM. With the Phillips standard, every...

ADC regular channels vs injected channels

Posted on August 12, 2013 at 13:52Hello,Can somebody kindly explain the difference/ different usage scenarios of ADC regular channels and injected channels?As per available documentation, it is mentioned injected channels are intended, when the conv...

SysTick_Handler suspended during other interrupts

Posted on August 13, 2013 at 17:12Hello Allm I am prototyping with the STM32 F3 Discovery board and using the ST standard peripheral library.  I am also using some example code that contains a function - Delay() - which uses the SysTick_Handler to d...

STM32F37x SRAM size

Posted on August 13, 2013 at 14:23Hi, I have a simple question regarding internal SRAM size of STM32F373Rx processor. Datasheet (rev.3, table 2 on page 10) specifies SRAM size of 24kB for 128kB Flash units,but I can read and write up to 32kB of SRAM...

bpacan by Associate II
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Generating a fixed number of pulses on trigger

Posted on August 08, 2013 at 23:31Hi,I have what is essentially a timer question. I am interested in using an STM32 F4 (more RAM, higher clock speeds) for an application. My application requires me to generate a pulse every 2ms, pulse length ~100 us...

srsinha by Associate II
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DMA interrupt handler hit but no IT flags set

Posted on August 13, 2013 at 11:41Hi, I am using DMA1 on an STM32F103 to collect data continuously from ADC1 as it cycles thru a regular conversion group.  Every time the DMA transfer complete interrupt fires I post an event to look at the data and ...

STM32F0 does not run standalone

Posted on August 12, 2013 at 13:27Hi, on my STM32F0 discovery board I configured the clock source to be HSI with a system_stm32f0xx.c generated by the clock configuration tool . That seemed to run like it should. Now I pulled JP2 and supplied Vdd pi...

mmensch by Associate II
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Help to create large buffers in RAM

Posted on August 12, 2013 at 21:48 Hello guys, I need some help. I want to create a large buffer in the sram and I'm having some problems with the compiler. I want to use the 112KB SRAM memory (pag 52 - RM0090) for my buffer. But when I w...