325 lines
12 KiB
C
325 lines
12 KiB
C
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/********************************** (C) COPYRIGHT *******************************
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* File Name : CH57x_SPI0.c
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* Author : WCH
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* Version : V1.0
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* Date : 2018/12/15
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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 : SPI0_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 SPI0_MasterDefInit( void )
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{
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R8_SPI0_CLOCK_DIV = 4; // 主频时钟4分频
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R8_SPI0_CTRL_MOD = RB_SPI_ALL_CLEAR;
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R8_SPI0_CTRL_MOD = RB_SPI_MOSI_OE | RB_SPI_SCK_OE ;
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R8_SPI0_CTRL_CFG |= RB_SPI_AUTO_IF; // 访问BUFFER/FIFO自动清除IF_BYTE_END标志
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R8_SPI0_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 : SPI0_CLKCfg
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* Description : SPI0 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 SPI0_CLKCfg( UINT8 c )
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{
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if(c==2)
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R8_SPI0_CTRL_CFG |= RB_SPI_MST_DLY_EN;
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else
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R8_SPI0_CTRL_CFG &= ~RB_SPI_MST_DLY_EN;
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R8_SPI0_CLOCK_DIV = c;
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}
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/*******************************************************************************
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* Function Name : SPI0_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 SPI0_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_SPI0_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
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R8_SPI0_CTRL_CFG |= RB_SPI_BIT_ORDER;
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break;
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case Mode0_HighBitINFront:
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R8_SPI0_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
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R8_SPI0_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
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break;
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case Mode3_LowBitINFront:
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R8_SPI0_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
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R8_SPI0_CTRL_CFG |= RB_SPI_BIT_ORDER;
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break;
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case Mode3_HighBitINFront:
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R8_SPI0_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
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R8_SPI0_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 : SPI0_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 SPI0_MasterSendByte( UINT8 d )
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{
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R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R8_SPI0_BUFFER = d;
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while( !(R8_SPI0_INT_FLAG & RB_SPI_FREE) );
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}
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/*******************************************************************************
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* Function Name : SPI0_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 SPI0_MasterRecvByte( void )
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{
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R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R8_SPI0_BUFFER = 0xFF; // 启动传输
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while( !(R8_SPI0_INT_FLAG & RB_SPI_FREE) );
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return ( R8_SPI0_BUFFER );
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}
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/*******************************************************************************
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* Function Name : SPI0_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 SPI0_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_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出
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R16_SPI0_TOTAL_CNT = sendlen; // 设置要发送的数据长度
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END;
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while( sendlen )
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{
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if( R8_SPI0_FIFO_COUNT < SPI_FIFO_SIZE )
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{
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R8_SPI0_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_SPI0_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 : SPI0_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 SPI0_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_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; // 设置数据方向为输入
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R16_SPI0_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_SPI0_INT_FLAG = RB_SPI_IF_CNT_END;
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while( readlen )
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{
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if( R8_SPI0_FIFO_COUNT )
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{
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*pbuf = R8_SPI0_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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/*******************************************************************************
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* Function Name : SPI0_MasterDMATrans
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* Description : DMA方式连续发送数据
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* Input : pbuf: 待发送数据起始地址
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* len : 待发送数据长度
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* Return : None
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*******************************************************************************/
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void SPI0_MasterDMATrans( PUINT8 pbuf, UINT16 len)
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{
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R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R16_SPI0_DMA_BEG = (UINT32)pbuf;
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R16_SPI0_DMA_END = (UINT32)(pbuf + len);
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R16_SPI0_TOTAL_CNT = len;
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END|RB_SPI_IF_DMA_END;
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R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE;
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while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END));
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R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE;
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}
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/*******************************************************************************
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* Function Name : SPI0_MasterDMARecv
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* Description : DMA方式连续接收数据
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* Input : pbuf: 待接收数据存放起始地址
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* len : 待接收数据长度
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* Return : None
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*******************************************************************************/
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void SPI0_MasterDMARecv( PUINT8 pbuf, UINT16 len)
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{
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R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR;
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R16_SPI0_DMA_BEG = (UINT32)pbuf;
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R16_SPI0_DMA_END = (UINT32)(pbuf + len);
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R16_SPI0_TOTAL_CNT = len;
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END|RB_SPI_IF_DMA_END;
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R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE;
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while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END));
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R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE;
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveInit
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* Description : 设备模式默认初始化，建议设置MISO的GPIO对应为输入模式
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* Input : None
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* Return : None
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*******************************************************************************/
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void SPI0_SlaveInit( void )
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{
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R8_SPI0_CTRL_MOD = RB_SPI_ALL_CLEAR;
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R8_SPI0_CTRL_MOD = RB_SPI_MISO_OE | RB_SPI_MODE_SLAVE;
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R8_SPI0_CTRL_CFG |= RB_SPI_AUTO_IF;
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveRecvByte
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* Description : 从机模式，接收一字节数据
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* Input : None
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* Return : 接收到数据
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*******************************************************************************/
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UINT8 SPI0_SlaveRecvByte( void )
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{
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R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR;
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while( R8_SPI0_FIFO_COUNT == 0 );
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return R8_SPI0_FIFO;
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveSendByte
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* Description : 从机模式，发送一字节数据
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* Input : d -待发送数据
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* Return : None
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*******************************************************************************/
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void SPI0_SlaveSendByte( UINT8 d )
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{
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R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R8_SPI0_FIFO = d;
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while( R8_SPI0_FIFO_COUNT != 0 ); // 等待发送完成
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveRecv
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* Description : 从机模式，接收多字节数据
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* Input : pbuf: 接收收数据存放起始地址
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* len : 请求接收数据长度
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* Return : None
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*******************************************************************************/
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void SPI0_SlaveRecv( PUINT8 pbuf, UINT16 len )
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{
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UINT16 revlen;
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revlen = len;
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R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR;
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END;
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while( revlen )
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{
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if( R8_SPI0_FIFO_COUNT )
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{
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*pbuf = R8_SPI0_FIFO;
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pbuf++;
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revlen--;
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}
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}
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveTrans
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* Description : 从机模式，发送多字节数据
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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 SPI0_SlaveTrans( 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_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END;
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while( sendlen )
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{
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if( R8_SPI0_FIFO_COUNT < SPI_FIFO_SIZE )
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{
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R8_SPI0_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_SPI0_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 : SPI0_SlaveDMARecv
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* Description : DMA方式连续接收数据
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* Input : pbuf: 待接收数据存放起始地址
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* len : 待接收数据长度
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* Return : None
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*******************************************************************************/
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void SPI0_SlaveDMARecv( PUINT8 pbuf, UINT16 len)
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{
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R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR;
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R16_SPI0_DMA_BEG = (UINT32)pbuf;
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R16_SPI0_DMA_END = (UINT32)(pbuf + len);
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R16_SPI0_TOTAL_CNT = len;
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END|RB_SPI_IF_DMA_END;
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R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE;
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while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END));
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R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE;
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}
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/*******************************************************************************
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* Function Name : SPI0_SlaveDMATrans
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* Description : DMA方式连续发送数据
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* Input : pbuf: 待发送数据起始地址
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* len : 待发送数据长度
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* Return : None
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*******************************************************************************/
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void SPI0_SlaveDMATrans( PUINT8 pbuf, UINT16 len)
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{
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R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
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R16_SPI0_DMA_BEG = (UINT32)pbuf;
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R16_SPI0_DMA_END = (UINT32)(pbuf + len);
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R16_SPI0_TOTAL_CNT = len;
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R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END|RB_SPI_IF_DMA_END;
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R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE;
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while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END));
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R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE;
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}
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