About gitarpista

gitarpista · 2012-05-01

Posted on May 01, 2012 at 12:37Hi. I want to simply read the PCM data coming from the microphone(MP45DT02), which is on the stm32f4 discovery board. I configured the I2S2_CK and I2S2_SD pins, the I2S communication, and enabled the SPI_I2S_IT_RXNE in...

gitarpista · 2012-04-23

Posted on April 24, 2012 at 00:01Hi. If i want to use PDM_Filter_64_LSB() function from pmd_filter.h in my program or just build the ''Audio_playback_and_record'' project, i got a 'undefined reference to PDM_Filter_64_LSB' error. I guess i have to ...

gitarpista · 2012-05-04

Posted on May 05, 2012 at 00:25 With an oscilloscope i could measure the I2S_SCK clock but there's no data on the I2S_DOUT. I also tried to call the functions above, but nothing happens. Maybe my mic is the problem. I dont have any idea, but tr...

gitarpista · 2012-05-02

Posted on May 02, 2012 at 20:49I dont understand exactly what you mean, but if i configure the SPI communication this way, it works perfectly(obviously not the mic, but everything else). If i change to I2S_MCLKOutput_Enable it doest work either, if ...

gitarpista · 2012-05-02

Posted on May 02, 2012 at 20:47

gitarpista · 2012-05-01

Posted on May 01, 2012 at 20:15Thanx. 'volatile' helped a bit, because 'app' isnt 'not in scope' anymore after the statement app = SPI_I2S_ReceiveData(SPI2). But of course it's always zero. It looks like the microphone doesnt send anything towards ...

gitarpista · 2012-05-01

Posted on May 01, 2012 at 14:58GPIO config: GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10...

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