STM32CubeMx 4.17 Send data 16 over SPI using DMA

[tinhlagi9947]

Posted on November 09, 2016 at 02:31

Hi,

I want to transfer data 16bit over SPI using DMA (data width: half word, Mode: normal), but in function HAL_SPI_Transmit_DMA(SPIx, (uint8_t *)data, uint16_t size) only transfer data 8bit. I want to fill color on ILI9341 LCD.Many thanks.

[Tesla DeLorean]

Posted on November 09, 2016 at 03:07

Are you sure it is not just a pointer cast of convenience? What's the actual transfer being configured as?

[tinhlagi9947]

Posted on November 09, 2016 at 03:53

I want to transfer such asx SPI_DMA_SendHalfWord(SPIx, uint16_t value, uint16_t count); 

Ex: SPI_DMA_SendHalfWord(SPIx, color, 0xFFFF);  // Send 65535 bytes, SPI MUST BE IN 16-bit MODE