ls7366 STM32例程

以下是LS7366 STM32的例程：

#include "stm32f10x.h"
#include "LS7366.h"

void SPI_MasterInit(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef  SPI_InitStructure;
  
    /* Enable SPI1 and GPIOA clocks */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 | RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure SPI1 pins: SCK, MISO and MOSI -------------------------------*/
    /* Configure SCK and MOSI pins as Alternate Function Push Pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    /* Configure MISO pin as Input Floating  */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* SPI1 configuration ------------------------------------------------------*/
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI1, &SPI_InitStructure);

    /* Enable SPI1 */
    SPI_Cmd(SPI1, ENABLE);
}

void Delay (uint32_t nCount)
{
    while(nCount--)
    {
    }
}

int main(void)
{
    int i;
    uint32_t nCount;
    uint8_t txData[5], rxData[5];

    SPI_MasterInit();

    LS7366_Init();

    nCount = 0;
    while(1)
    {
        nCount = LS7366_GetCount();
        LS7366_ClearCount();

        Delay(1000000);

        txData[0] = 0x60;	//Read command
        txData[1] = 0x00;	//Address
        txData[2] = 0x00;
        txData[3] = 0x00;
        txData[4] = 0x00;

        /* Send SPI data */
        GPIO_ResetBits(GPIOA, GPIO_Pin_4);
        for (i = 0; i < 5; i++)
        {
            while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
            SPI_I2S_SendData(SPI1, txData[i]);
            while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
            rxData[i] = SPI_I2S_ReceiveData(SPI1);
        }
        GPIO_SetBits(GPIOA, GPIO_Pin_4);
    }
    return 0;
}

这个例程中使用了STM32的SPI1模块来与LS7366进行通信。同时也使用了LS7366库文件中的函数来初始化LS7366芯片并读取编码器的计数值。需要注意的是，在使用此例程时，需要根据具体的硬件连接情况来修改GPIO初始化和SPI初始化的参数。