SPI - send 16 bit and 8-bit data

Preface

Life is a journey , I am also a pedestrian .

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SPI 8 Bit data transfer

unsigned char code = 0xcf;

HAL_SPI_Transmit(&hspi1,code,1,0xffff);

SPI 16 Bit data transfer

• Method 1 ： Change the number of digits to 16 position , Call the send function ：

uint16_t code[1] = {
    0xcfff};

HAL_SPI_Transmit(&hspi1, (uint8_t *)code, 1, 0xffff);

• Method 2 ： Configure to 8 position Pattern , Then send two bits of data as an array ：

unsigned char code[2] = {
    0xcf, 0xff};

HAL_SPI_Transmit(&hspi1, code, 2, 0xffff);