wizspi.c

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//#define FILE_LOG_SILENCE
#include "host/wizspi.h"


int8 wizspi_init(wizpf_spi spi)
{
    SPI_TypeDef *SPIx;
    SPI_InitTypeDef SPI_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    switch(spi) {
    case WIZ_SPI1:
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
        GPIO_InitStructure.GPIO_Pin = SPI1_SCS_PIN;
        GPIO_Init(SPI1_SCS_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStructure.GPIO_Pin = SPI1_SCLK_PIN;
        GPIO_Init(SPI1_SCLK_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Pin = SPI1_MISO_PIN;
        GPIO_Init(SPI1_MISO_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Pin = SPI1_MOSI_PIN;
        GPIO_Init(SPI1_MOSI_PORT, &GPIO_InitStructure);
        GPIO_SetBits(SPI1_SCS_PORT, SPI1_SCS_PIN);
        SPIx = SPI1;
        break;
    case WIZ_SPI2:
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
        GPIO_InitStructure.GPIO_Pin = SPI2_SCS_PIN;
        GPIO_Init(SPI2_SCS_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStructure.GPIO_Pin = SPI2_SCLK_PIN;
        GPIO_Init(SPI2_SCLK_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Pin = SPI2_MISO_PIN;
        GPIO_Init(SPI2_MISO_PORT, &GPIO_InitStructure);
        GPIO_InitStructure.GPIO_Pin = SPI2_MOSI_PIN;
        GPIO_Init(SPI2_MOSI_PORT, &GPIO_InitStructure);
        GPIO_SetBits(SPI2_SCS_PORT, SPI2_SCS_PIN);
        SPIx = SPI2;
        break;
    //case WIZ_SPI3:
    //  break;
    default:
        ERRA("SPI(%d) is not allowed", spi);
        return RET_NOK;
    }

    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_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPIx, &SPI_InitStructure);
    SPI_Cmd(SPIx, ENABLE);

    return RET_OK;
}

void wizspi_cs(wizpf_spi spi, uint8 val)
{
    GPIO_TypeDef* GPIOx;
    uint16 GPIO_Pin;

    switch(spi) {
    case WIZ_SPI1:
        GPIOx = SPI1_SCS_PORT;
        GPIO_Pin = SPI1_SCS_PIN;
        break;
    case WIZ_SPI2:
        GPIOx = SPI2_SCS_PORT;
        GPIO_Pin = SPI2_SCS_PIN;
        break;
    //case WIZ_SPI3:
    //  break;
    default:
        ERRA("SPI(%d) is not allowed", spi);
        return;
    }

    if (val == VAL_LOW) {
        GPIO_ResetBits(GPIOx, GPIO_Pin);
    }else if (val == VAL_HIGH){
        GPIO_SetBits(GPIOx, GPIO_Pin); 
    }
}

uint8 wizspi_byte(wizpf_spi spi, uint8 byte)
{
    SPI_TypeDef *SPIx;

    switch(spi) {
    case WIZ_SPI1:
        SPIx = SPI1;
        break;
    case WIZ_SPI2:
        SPIx = SPI2;
        break;
    //case WIZ_SPI3:
    //  break;
    default:
        ERRA("SPI(%d) is not allowed", spi);
        return 0;
    }

    while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET);         
    SPI_I2S_SendData(SPIx, byte);          
    while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET);          
    return (uint8)SPI_I2S_ReceiveData(SPIx);
}

/* @} */