STM32F4xx Example code bug?

Anderson.Steven · ‎2015-10-13

Posted on October 13, 2015 at 15:32

In file:

...\STM32F4xx_DSP_StdPeriph_Lib_V1.6.0\Project\STM32F4xx_StdPeriph_Examples\ADC\ADC_TripleModeInterleaved\main.c

Is DMA_Memory0BaseAddr really intended to be a pointer to a pointer?

The variable aADCTripleConvertedValue is an array of 3 uint32_t's, so should (uint32_t)&aADCTripleConvertedValue below need a ''[0]'' appended?

From the file:

Declaration:

/* Private variables ---------------------------------------------------------*/

__IO uint32_t aADCTripleConvertedValue[3];

Use:

DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&aADCTripleConvertedValue;

Tesla DeLorean · ‎2015-10-13

Posted on October 13, 2015 at 18:16

Actually, all three of these resolve to the same address

DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)aADCTripleConvertedValue;

DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&aADCTripleConvertedValue;

DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&aADCTripleConvertedValue[0];

I'd prefer case 3, over 1, but I think you'll find there are all valid.

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