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/********************************** (C) COPYRIGHT *******************************
* File Name : CH58x_SPI1.c
* Author : WCH
* Version : V1.0
* Date : 2018/12/15
* Description
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/
#include "CH58x_common.h"
/*********************************************************************
* @fn SPI1_MasterDefInit
*
* @brief 主机模式默认初始化：模式0+3线全双工+8MHz
*
* @param none
*
* @return none
*/
void SPI1_MasterDefInit(void)
{
R8_SPI1_CLOCK_DIV = 4; // 主频时钟4分频
R8_SPI1_CTRL_MOD = RB_SPI_ALL_CLEAR;
R8_SPI1_CTRL_MOD = RB_SPI1_SDO_OE | RB_SPI_SCK_OE;
R8_SPI1_CTRL_CFG |= RB_SPI_AUTO_IF; // 访问BUFFER/FIFO自动清除IF_BYTE_END标志
}
/*********************************************************************
* @fn SPI1_CLKCfg
*
* @brief SPI1 基准时钟配置，= d*Tsys
*
* @param c - 时钟分频系数
*
* @return none
*/
void SPI1_CLKCfg(uint8_t c)
{
if(c == 2)
{
R8_SPI1_CTRL_CFG |= RB_SPI_MST_DLY_EN;
}
else
{
R8_SPI1_CTRL_CFG &= ~RB_SPI_MST_DLY_EN;
}
R8_SPI1_CLOCK_DIV = c;
}
/*********************************************************************
* @fn SPI1_DataMode
*
* @brief 设置数据流模式
*
* @param m - 数据流模式 refer to ModeBitOrderTypeDef
*
* @return none
*/
void SPI1_DataMode(ModeBitOrderTypeDef m)
{
switch(m)
{
case Mode0_LowBitINFront:
R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
break;
case Mode0_HighBitINFront:
R8_SPI1_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD;
R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
break;
case Mode3_LowBitINFront:
R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
R8_SPI1_CTRL_CFG |= RB_SPI_BIT_ORDER;
break;
case Mode3_HighBitINFront:
R8_SPI1_CTRL_MOD |= RB_SPI_MST_SCK_MOD;
R8_SPI1_CTRL_CFG &= ~RB_SPI_BIT_ORDER;
break;
default:
break;
}
}
/*********************************************************************
* @fn SPI1_MasterSendByte
*
* @brief 发送单字节 (buffer)
*
* @param d - 发送字节
*
* @return none
*/
void SPI1_MasterSendByte(uint8_t d)
{
R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
R8_SPI1_BUFFER = d;
while(!(R8_SPI1_INT_FLAG & RB_SPI_FREE));
}
/*********************************************************************
* @fn SPI1_MasterRecvByte
*
* @brief 接收单字节 (buffer)
*
* @param none
*
* @return 接收到的字节
*/
uint8_t SPI1_MasterRecvByte(void)
{
R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR;
R8_SPI1_BUFFER = 0xFF; // 启动传输
while(!(R8_SPI1_INT_FLAG & RB_SPI_FREE));
return (R8_SPI1_BUFFER);
}
/*********************************************************************
* @fn SPI1_MasterTrans
*
* @brief 使用FIFO连续发送多字节
*
* @param pbuf - 待发送的数据内容首地址
* @param len - 请求发送的数据长度，最大4095
*
* @return none
*/
void SPI1_MasterTrans(uint8_t *pbuf, uint16_t len)
{
uint16_t sendlen;
sendlen = len;
R8_SPI1_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出
R16_SPI1_TOTAL_CNT = sendlen; // 设置要发送的数据长度
R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
while(sendlen)
{
if(R8_SPI1_FIFO_COUNT < SPI_FIFO_SIZE)
{
R8_SPI1_FIFO = *pbuf;
pbuf++;
sendlen--;
}
}
while(R8_SPI1_FIFO_COUNT != 0); // 等待FIFO中的数据全部发送完成
}
/*********************************************************************
* @fn SPI1_MasterRecv
*
* @brief 使用FIFO连续接收多字节
*
* @param pbuf - 待接收的数据首地址
* @param len - 待接收的数据长度，最大4095
*
* @return none
*/
void SPI1_MasterRecv(uint8_t *pbuf, uint16_t len)
{
uint16_t readlen;
readlen = len;
R8_SPI1_CTRL_MOD |= RB_SPI_FIFO_DIR; // 设置数据方向为输入
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 */
R8_SPI1_INT_FLAG = RB_SPI_IF_CNT_END;
while(readlen)
{
if(R8_SPI1_FIFO_COUNT)
{
*pbuf = R8_SPI1_FIFO;
pbuf++;
readlen--;
}
}
}
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