/********************************** (C) COPYRIGHT ******************************* * File Name : CH59x_SPI0.c * Author : WCH * Version : V1.2 * Date : 2021/11/17 * 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 "CH59x_common.h" /********************************************************************* * @fn SPI0_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 SPI0_MasterDefInit(void) { R8_SPI0_CLOCK_DIV = 4; // 主频时钟4分频 R8_SPI0_CTRL_MOD = RB_SPI_ALL_CLEAR; R8_SPI0_CTRL_MOD = RB_SPI_MOSI_OE | RB_SPI_SCK_OE; R8_SPI0_CTRL_CFG |= RB_SPI_AUTO_IF; // 访问BUFFER/FIFO自动清除IF_BYTE_END标志 R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; // 不启动DMA方式 } /********************************************************************* * @fn SPI0_CLKCfg * * @brief SPI0 基准时钟配置，= d*Tsys * * @param c - 时钟分频系数 * * @return none */ void SPI0_CLKCfg(uint8_t c) { if(c == 2) { R8_SPI0_CTRL_CFG |= RB_SPI_MST_DLY_EN; } else { R8_SPI0_CTRL_CFG &= ~RB_SPI_MST_DLY_EN; } R8_SPI0_CLOCK_DIV = c; } /********************************************************************* * @fn SPI0_DataMode * * @brief 设置数据流模式 * * @param m - 数据流模式 refer to ModeBitOrderTypeDef * * @return none */ void SPI0_DataMode(ModeBitOrderTypeDef m) { switch(m) { case Mode0_LowBitINFront: R8_SPI0_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD; R8_SPI0_CTRL_CFG |= RB_SPI_BIT_ORDER; break; case Mode0_HighBitINFront: R8_SPI0_CTRL_MOD &= ~RB_SPI_MST_SCK_MOD; R8_SPI0_CTRL_CFG &= ~RB_SPI_BIT_ORDER; break; case Mode3_LowBitINFront: R8_SPI0_CTRL_MOD |= RB_SPI_MST_SCK_MOD; R8_SPI0_CTRL_CFG |= RB_SPI_BIT_ORDER; break; case Mode3_HighBitINFront: R8_SPI0_CTRL_MOD |= RB_SPI_MST_SCK_MOD; R8_SPI0_CTRL_CFG &= ~RB_SPI_BIT_ORDER; break; default: break; } } /********************************************************************* * @fn SPI0_MasterSendByte * * @brief 发送单字节 (buffer) * * @param d - 发送字节 * * @return none */ void SPI0_MasterSendByte(uint8_t d) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R8_SPI0_BUFFER = d; while(!(R8_SPI0_INT_FLAG & RB_SPI_FREE)); } /********************************************************************* * @fn SPI0_MasterRecvByte * * @brief 接收单字节 (buffer) * * @param none * * @return 接收到的字节 */ uint8_t SPI0_MasterRecvByte(void) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R8_SPI0_BUFFER = 0xFF; // 启动传输 while(!(R8_SPI0_INT_FLAG & RB_SPI_FREE)); return (R8_SPI0_BUFFER); } /********************************************************************* * @fn SPI0_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 SPI0_MasterTrans(uint8_t *pbuf, uint16_t len) { uint16_t sendlen; sendlen = len; R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出 R16_SPI0_TOTAL_CNT = sendlen; // 设置要发送的数据长度 R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END; while(sendlen) { if(R8_SPI0_FIFO_COUNT < SPI_FIFO_SIZE) { R8_SPI0_FIFO = *pbuf; pbuf++; sendlen--; } } while(R8_SPI0_FIFO_COUNT != 0); // 等待FIFO中的数据全部发送完成 } /********************************************************************* * @fn SPI0_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 SPI0_MasterRecv(uint8_t *pbuf, uint16_t len) { uint16_t readlen; readlen = len; R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; // 设置数据方向为输入 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 */ R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END; while(readlen) { if(R8_SPI0_FIFO_COUNT) { *pbuf = R8_SPI0_FIFO; pbuf++; readlen--; } } } /********************************************************************* * @fn SPI0_MasterDMATrans * * @brief DMA方式连续发送数据 * * @param pbuf - 待发送数据起始地址,需要四字节对其 * @param len - 待发送数据长度 * * @return none */ void SPI0_MasterDMATrans(uint8_t *pbuf, uint16_t len) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R16_SPI0_DMA_BEG = (uint32_t)pbuf; R16_SPI0_DMA_END = (uint32_t)(pbuf + len); R16_SPI0_TOTAL_CNT = len; R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END | RB_SPI_IF_DMA_END; R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE; while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END)); R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; } /********************************************************************* * @fn SPI0_MasterDMARecv * * @brief DMA方式连续接收数据 * * @param pbuf - 待接收数据存放起始地址,需要四字节对其 * @param len - 待接收数据长度 * * @return none */ void SPI0_MasterDMARecv(uint8_t *pbuf, uint16_t len) { R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; R16_SPI0_DMA_BEG = (uint32_t)pbuf; R16_SPI0_DMA_END = (uint32_t)(pbuf + len); R16_SPI0_TOTAL_CNT = len; R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END | RB_SPI_IF_DMA_END; R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE; while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END)); R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; } /********************************************************************* * @fn SPI0_SlaveInit * * @brief 设备模式默认初始化，建议设置MISO的GPIO对应为输入模式 * * @return none */ void SPI0_SlaveInit(void) { R8_SPI0_CTRL_MOD = RB_SPI_ALL_CLEAR; R8_SPI0_CTRL_MOD = RB_SPI_MISO_OE | RB_SPI_MODE_SLAVE; R8_SPI0_CTRL_CFG |= RB_SPI_AUTO_IF; } /********************************************************************* * @fn SPI0_SlaveRecvByte * * @brief 从机模式，接收一字节数据 * * @return 接收到数据 */ uint8_t SPI0_SlaveRecvByte(void) { R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; while(R8_SPI0_FIFO_COUNT == 0); return R8_SPI0_FIFO; } /********************************************************************* * @fn SPI0_SlaveSendByte * * @brief 从机模式，发送一字节数据 * * @param d - 待发送数据 * * @return none */ void SPI0_SlaveSendByte(uint8_t d) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R8_SPI0_FIFO = d; while(R8_SPI0_FIFO_COUNT != 0); // 等待发送完成 } /********************************************************************* * @fn SPI0_SlaveRecv * * @brief 从机模式，接收多字节数据 * * @param pbuf - 接收收数据存放起始地址 * @param len - 请求接收数据长度 * * @return none */ __HIGH_CODE void SPI0_SlaveRecv(uint8_t *pbuf, uint16_t len) { uint16_t revlen; revlen = len; R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END; while(revlen) { if(R8_SPI0_FIFO_COUNT) { *pbuf = R8_SPI0_FIFO; pbuf++; revlen--; } } } /********************************************************************* * @fn SPI0_SlaveTrans * * @brief 从机模式，发送多字节数据 * * @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 */ __HIGH_CODE void SPI0_SlaveTrans(uint8_t *pbuf, uint16_t len) { uint16_t sendlen; sendlen = len; R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; // 设置数据方向为输出 R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END; while(sendlen) { if(R8_SPI0_FIFO_COUNT < SPI_FIFO_SIZE) { R8_SPI0_FIFO = *pbuf; pbuf++; sendlen--; } } while(R8_SPI0_FIFO_COUNT != 0); // 等待FIFO中的数据全部发送完成 } /********************************************************************* * @fn SPI0_SlaveDMARecv * * @brief DMA方式连续接收数据 * * @param pbuf - 待接收数据存放起始地址,需要四字节对其 * @param len - 待接收数据长度 * * @return none */ void SPI0_SlaveDMARecv(uint8_t *pbuf, uint16_t len) { R8_SPI0_CTRL_MOD |= RB_SPI_FIFO_DIR; R16_SPI0_DMA_BEG = (uint32_t)pbuf; R16_SPI0_DMA_END = (uint32_t)(pbuf + len); R16_SPI0_TOTAL_CNT = len; R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END | RB_SPI_IF_DMA_END; R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE; while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END)); R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; } /********************************************************************* * @fn SPI0_SlaveDMATrans * * @brief DMA方式连续发送数据 * * @param pbuf - 待发送数据起始地址,需要四字节对其 * @param len - 待发送数据长度 * * @return none */ void SPI0_SlaveDMATrans(uint8_t *pbuf, uint16_t len) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R16_SPI0_DMA_BEG = (uint32_t)pbuf; R16_SPI0_DMA_END = (uint32_t)(pbuf + len); R16_SPI0_TOTAL_CNT = len; R8_SPI0_INT_FLAG = RB_SPI_IF_CNT_END | RB_SPI_IF_DMA_END; R8_SPI0_CTRL_CFG |= RB_SPI_DMA_ENABLE; while(!(R8_SPI0_INT_FLAG & RB_SPI_IF_CNT_END)); R8_SPI0_CTRL_CFG &= ~RB_SPI_DMA_ENABLE; } uint8_t SPI0_MasterSendByte_tang(uint8_t data) { R8_SPI0_CTRL_MOD &= ~RB_SPI_FIFO_DIR; R8_SPI0_BUFFER = data; while (!(R8_SPI0_INT_FLAG & RB_SPI_FREE)); return (R8_SPI0_BUFFER); }