132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
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/*************************************CopyRight(c)************************************************
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** <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˾
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** www.lvbu.wang
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**************************************************************************************************
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**Filename:
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**Version:
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**Author:
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**Date:
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**Description:
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**
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**************************************************************************************************
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**Version:
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**Modifier:
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**Datemodified:
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**Description:
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**
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**************************************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*********************************************************************
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* Include
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*/
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#include "spi_soft.h"
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#include "gpio.h"
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/*********************************************************************
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* Macros
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*/
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/*********************************************************************
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* Constants
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*/
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/*********************************************************************
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* Typedefs
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*/
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/*********************************************************************
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* Global Variables
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*/
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/*********************************************************************
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* Global Functions
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*/
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/*********************************************************************
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* External Variables
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*/
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/*********************************************************************
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* External Functions
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*/
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/*********************************************************************
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* Local Vriables
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*/
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static uint32_t csio=0;
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static uint32_t wrio=0;
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static uint32_t rdio=0;
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static uint32_t dataio=0;
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/*********************************************************************
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* Local Functions
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*/
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void spi_soft_delay_us(uint16_t n) {
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uint16_t i,j;
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for(i=0; i<n; i++)
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for(j=0; j<2; j++);
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}
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void spi_soft_init(spi_soft_t * p_spis,uint32_t cs_io,uint32_t wr_io, uint32_t rd_io, uint32_t data_io )
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{
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p_spis->csio = cs_io;
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p_spis->wrio =wr_io;
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p_spis->rdio =rd_io;
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p_spis->dataio =data_io;
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GPIO_Set_Output(U32BIT(p_spis->csio) | U32BIT(p_spis->dataio));
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GPIO_Pin_Set(U32BIT(p_spis->csio) | U32BIT(p_spis->dataio));
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if(p_spis->wrio != 0)
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{
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GPIO_Set_Output(U32BIT(p_spis->wrio));
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GPIO_Pin_Set(U32BIT(p_spis->wrio));
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}
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if(p_spis->rdio != 0)
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{
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GPIO_Set_Output(U32BIT(p_spis->rdio) );
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GPIO_Pin_Set(U32BIT(p_spis->rdio) );
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}
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}
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void spi_soft_cs_enable(spi_soft_t * p_spis)
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{
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GPIO_Pin_Clear(U32BIT(p_spis->csio));
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}
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void spi_soft_cs_disenable(spi_soft_t * p_spis)
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{
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GPIO_Pin_Set(U32BIT(p_spis->csio));
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}
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void spi_soft_writebit(spi_soft_t * p_spis,uint8_t Data,uint8_t cnt)
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{
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unsigned char i;
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for (i=0;i<cnt;i++)
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{
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GPIO_Pin_Clear(U32BIT(p_spis->wrio));
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spi_soft_delay_us(5);
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if((Data&0x80)==0)
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{
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GPIO_Pin_Clear(U32BIT(p_spis->dataio));
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}
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else
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{
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GPIO_Pin_Set(U32BIT(p_spis->dataio));
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}
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spi_soft_delay_us(5);
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GPIO_Pin_Set(U32BIT(p_spis->wrio));
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spi_soft_delay_us(5);
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Data<<=1;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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