180 lines
4.7 KiB
C
180 lines
4.7 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : CH58x_SPI1.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 : source file(ch585/ch584)
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "CH58x_common.h"
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/*********************************************************************
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* @fn SPI1_MasterDefInit
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*
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* @brief 主机模式默认初始化：模式0+3线全双工+8MHz
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*
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* @param none
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*
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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 = 240; // 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 | RB_SPI_MISO_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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* @fn SPI1_CLKCfg
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*
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* @brief SPI1 基准时钟配置，= d*Tsys
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*
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* @param c - 时钟分频系数
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*
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* @return none
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*/
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void SPI1_CLKCfg(uint8_t c)
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{
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if(c == 2)
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{
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R8_SPI1_CTRL_CFG |= RB_SPI_MST_DLY_EN;
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}
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else
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{
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R8_SPI1_CTRL_CFG &= ~RB_SPI_MST_DLY_EN;
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}
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R8_SPI1_CLOCK_DIV = c;
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}
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/*********************************************************************
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* @fn SPI1_DataMode
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*
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* @brief 设置数据流模式
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*
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* @param m - 数据流模式 refer to ModeBitOrderTypeDef
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*
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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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* @fn SPI1_MasterSendByte
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*
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* @brief 发送单字节 (buffer)
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*
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* @param d - 发送字节
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*
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* @return none
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*/
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void SPI1_MasterSendByte(uint8_t 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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* @fn SPI1_MasterRecvByte
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*
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* @brief 接收单字节 (buffer)
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*
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* @param none
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*
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* @return 接收到的字节
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*/
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uint8_t 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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* @fn SPI1_MasterTrans
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*
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* @brief 使用FIFO连续发送多字节
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*
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* @param pbuf - 待发送的数据内容首地址
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* @param len - 请求发送的数据长度，最大4095
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*
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* @return none
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*/
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void SPI1_MasterTrans(uint8_t *pbuf, uint16_t len)
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{
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uint16_t 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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* @fn SPI1_MasterRecv
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*
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* @brief 使用FIFO连续接收多字节
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*
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* @param pbuf - 待接收的数据首地址
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* @param len - 待接收的数据长度，最大4095
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*
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* @return none
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*/
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void SPI1_MasterRecv(uint8_t *pbuf, uint16_t len)
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{
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uint16_t 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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