157 lines
5.4 KiB
C
157 lines
5.4 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : CH57x_SPI1.c
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* Author : WCH
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* Version : V1.0
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* Date : 2019/4/29
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* Description
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*******************************************************************************/
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#include "CH57x_common.h"
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/*******************************************************************************
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* Function Name : SPI1_MasterDefInit
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* Description : 主机模式默认初始化：模式0+3线全双工+8MHz
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* Input : None
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* Return : None
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*******************************************************************************/
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void SPI1_MasterDefInit( void )
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{
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R8_SPI1_CLOCK_DIV = 4; // 主频时钟4分频
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R8_SPI1_CTRL_MOD = RB_SPI_ALL_CLEAR;
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R8_SPI1_CTRL_MOD = RB_SPI_MOSI_OE | RB_SPI_SCK_OE ;
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R8_SPI1_CTRL_CFG |= RB_SPI_AUTO_IF; // 访问BUFFER/FIFO自动清除IF_BYTE_END标志
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R8_SPI1_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; // 不启动DMA方式
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}
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/*******************************************************************************
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* Function Name : SPI1_CLKCfg
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* Description : SPI1 基准时钟配置，= d*Tsys
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* Input : c: 时钟分频系数
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* Return : None
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*******************************************************************************/
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void SPI1_CLKCfg( UINT8 c )
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{
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if(c==2)
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R8_SPI1_CTRL_CFG |= RB_SPI_MST_DLY_EN;
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else
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R8_SPI1_CTRL_CFG &= ~RB_SPI_MST_DLY_EN;
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R8_SPI1_CLOCK_DIV = c;
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}
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/*******************************************************************************
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* Function Name : SPI1_DataMode
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* Description : 设置数据流模式
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* Input : m: 数据流模式
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refer to ModeBitOrderTypeDef
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* Return : None
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*******************************************************************************/
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void SPI1_DataMode( ModeBitOrderTypeDef m )
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{
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switch( m )
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{
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case Mode0_LowBitINFront:
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R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
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R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
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break;
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case Mode0_HighBitINFront:
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R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
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R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
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break;
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case Mode3_LowBitINFront:
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R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
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R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
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break;
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case Mode3_HighBitINFront:
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R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
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R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
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break;
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default:
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break;
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}
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}
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/*******************************************************************************
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* Function Name : SPI1_MasterSendByte
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* Description : 发送单字节 (buffer)
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* Input : d: 发送字节
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* Return : None
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*******************************************************************************/
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void SPI1_MasterSendByte( UINT8 d )
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{
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R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R8_SPI1_BUFFER = d;
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while( !(R8_SPI1_INT_FLAG & RB_SPI_FREE) );
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}
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/*******************************************************************************
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* Function Name : SPI1_MasterRecvByte
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* Description : 接收单字节 (buffer)
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* Input : None
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* Return : 接收到的字节
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*******************************************************************************/
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UINT8 SPI1_MasterRecvByte( void )
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{
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R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R8_SPI1_BUFFER = 0xFF; // 启动传输
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while( !(R8_SPI1_INT_FLAG & RB_SPI_FREE) );
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return ( R8_SPI1_BUFFER );
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}
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/*******************************************************************************
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* Function Name : SPI1_MasterTrans
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* Description : 使用FIFO连续发送多字节
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* Input : pbuf: 待发送的数据内容首地址
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len: 请求发送的数据长度，最大4095
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* Return : None
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*******************************************************************************/
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void SPI1_MasterTrans( UINT8 *pbuf, UINT16 len )
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{
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UINT16 sendlen;
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sendlen = len;
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R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出
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R16_SPI1_TOTAL_CNT = sendlen; // 设置要发送的数据长度
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R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
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while( sendlen )
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{
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if( R8_SPI1_FIFO_COUNT < SPI_FIFO_SIZE )
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{
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R8_SPI1_FIFO = *pbuf;
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pbuf++;
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sendlen--;
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}
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}
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while( R8_SPI1_FIFO_COUNT != 0 ); // 等待FIFO中的数据全部发送完成
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}
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/*******************************************************************************
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* Function Name : SPI1_MasterRecv
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* Description : 使用FIFO连续接收多字节
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* Input : pbuf: 待发送的数据内容首地址
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len: 请求发送的数据长度，最大4095
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* Return : None
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*******************************************************************************/
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void SPI1_MasterRecv( UINT8 *pbuf, UINT16 len )
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{
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UINT16 readlen;
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readlen = len;
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R8_SPI1_CTRL_MOD |= RB_SPI_FIFO_DIR; // 设置数据方向为输入
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R16_SPI1_TOTAL_CNT = len; // 设置需要接收的数据长度，FIFO方向为输入长度不为0则会启动传输 */
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R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
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while( readlen )
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{
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if( R8_SPI1_FIFO_COUNT )
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{
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*pbuf = R8_SPI1_FIFO;
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pbuf++;
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readlen--;
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}
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}
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}
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