stm32 hal spi tle5012

#include "main.h"

#include "stdarg.h"
#include "stdio.h"

extern SPI_HandleTypeDef hspi1;
extern UART_HandleTypeDef huart1;

void USARTx_Printf (char *fmt_pa, ...);

void tle5012(void)
{
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);

    uint16_t ang_reg_v = 0x8021, data_v;
    HAL_SPI_Transmit(&hspi1, (uint8_t *)(&ang_reg_v), 1, 0xff);
    HAL_SPI_Receive(&hspi1, (uint8_t *)(&data_v), 1, 0xff);

    data_v = data_v & 0x7fff;
    float ang_v = data_v / (0x7fff / 360.0);

    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);

    USARTx_Printf("angle: %d.%03d\n", (int)ang_v, (int)((ang_v * 1000) - (int)(ang_v)*1000));
    HAL_Delay(500);
}

void USARTx_Printf (char *fmt_pa, ...)
{
    static char buffer_v[50];
    va_list arg_p;//定义指针arg_ptr
    va_start(arg_p, fmt_pa);//把arg_ptr定位到fmt开始的的位置
    uint8_t len_v = vsnprintf(buffer_v, 50, fmt_pa, arg_p);
    va_end(arg_p);
    while (HAL_UART_Transmit_IT(&huart1, (uint8_t *)buffer_v, len_v) != HAL_OK)
        ;
}

 在main.c的while里调用tle5012函数就行了