408 lines
19 KiB
C
408 lines
19 KiB
C
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/******************************************************************************************************************************************
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* 文件名称: SWM341_spi.c
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* 功能说明: SWM341单片机的SPI功能驱动库
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* 技术支持: http://www.synwit.com.cn/e/tool/gbook/?bid=1
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* 注意事项:
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* 版本日期: V1.0.0 2016年1月30日
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* 升级记录:
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*
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*
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*******************************************************************************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION
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* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
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* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
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* -ECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2012 Synwit Technology
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*******************************************************************************************************************************************/
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#include "SWM341.h"
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#include "SWM341_spi.h"
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/******************************************************************************************************************************************
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* 函数名称: SPI_Init()
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* 功能说明: SPI同步串行接口初始化，包括帧长度设定、时序设定、速度设定、中断设定、FIFO触发设定
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* SPI_InitStructure * initStruct 包含SPI相关设定值的结构体
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_Init(SPI_TypeDef * SPIx, SPI_InitStructure * initStruct)
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{
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uint32_t fast = 0, no_sync = 0;
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switch((uint32_t)SPIx)
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{
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case ((uint32_t)SPI0):
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SYS->CLKEN0 |= (0x01 << SYS_CLKEN0_SPI0_Pos);
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break;
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case ((uint32_t)SPI1):
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SYS->CLKEN0 |= (0x01 << SYS_CLKEN0_SPI1_Pos);
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break;
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}
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SPI_Close(SPIx); //一些关键寄存器只能在SPI关闭时设置
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if(initStruct->clkDiv == SPI_CLKDIV_2)
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{
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fast = 1;
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no_sync = 1;
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}
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else if(initStruct->clkDiv == SPI_CLKDIV_4)
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{
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no_sync = 1;
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}
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SPIx->CTRL &= ~(SPI_CTRL_FFS_Msk | SPI_CTRL_CPHA_Msk | SPI_CTRL_CPOL_Msk | SPI_CTRL_SIZE_Msk | SPI_CTRL_MSTR_Msk |
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SPI_CTRL_CLKDIV_Msk | SPI_CTRL_SSN_H_Msk | SPI_CTRL_RFTHR_Msk | SPI_CTRL_TFTHR_Msk);
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SPIx->CTRL |= (initStruct->FrameFormat << SPI_CTRL_FFS_Pos) |
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(initStruct->SampleEdge << SPI_CTRL_CPHA_Pos) |
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(initStruct->IdleLevel << SPI_CTRL_CPOL_Pos) |
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((initStruct->WordSize-1) << SPI_CTRL_SIZE_Pos) |
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(initStruct->Master << SPI_CTRL_MSTR_Pos) |
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(fast << SPI_CTRL_FAST_Pos) |
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(no_sync << SPI_CTRL_NSYNC_Pos) |
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((initStruct->clkDiv & 7) << SPI_CTRL_CLKDIV_Pos) |
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(0 << SPI_CTRL_SSN_H_Pos) |
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((initStruct->RXThreshold > 0 ? initStruct->RXThreshold-1 : 0) << SPI_CTRL_RFTHR_Pos) |
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(initStruct->TXThreshold << SPI_CTRL_TFTHR_Pos) |
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(1 << SPI_CTRL_RFCLR_Pos) |
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(1 << SPI_CTRL_TFCLR_Pos);
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SPIx->CTRL &= ~(SPI_CTRL_RFCLR_Msk | SPI_CTRL_TFCLR_Msk);
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SPIx->IF = 0x37F; //清除中断标志
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SPIx->IE = 0x000;
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SPIx->IE |= (initStruct->RXThresholdIEn << SPI_IE_RFTHR_Pos) |
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(initStruct->TXThresholdIEn << SPI_IE_TFTHR_Pos) |
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(initStruct->TXCompleteIEn << SPI_IE_FTC_Pos);
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switch((uint32_t)SPIx)
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{
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case ((uint32_t)SPI0):
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if(initStruct->RXThresholdIEn | initStruct->TXThresholdIEn | initStruct->TXCompleteIEn)
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{
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NVIC_EnableIRQ(SPI0_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(SPI0_IRQn);
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}
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break;
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case ((uint32_t)SPI1):
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if(initStruct->RXThresholdIEn | initStruct->TXThresholdIEn | initStruct->TXCompleteIEn)
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{
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NVIC_EnableIRQ(SPI1_IRQn);
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}
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else
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{
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NVIC_DisableIRQ(SPI1_IRQn);
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}
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break;
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}
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_Open()
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* 功能说明: SPI打开，允许收发
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_Open(SPI_TypeDef * SPIx)
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{
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SPIx->CTRL |= (0x01 << SPI_CTRL_EN_Pos);
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_Close()
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* 功能说明: SPI关闭，禁止收发
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_Close(SPI_TypeDef * SPIx)
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{
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SPIx->CTRL &= ~SPI_CTRL_EN_Msk;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_Read()
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* 功能说明: 读取一个数据
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: uint32_t 读取到的数据
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SPI_Read(SPI_TypeDef * SPIx)
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{
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return SPIx->DATA;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_Write()
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* 功能说明: 写入一个数据
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t 要写入的数据
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_Write(SPI_TypeDef * SPIx, uint32_t data)
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{
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SPIx->DATA = data;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_WriteWithWait()
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* 功能说明: 写入一个数据并等待数据完全发送出去
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1、SPI1
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* uint32_t 要写入的数据
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_WriteWithWait(SPI_TypeDef * SPIx, uint32_t data)
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{
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SPIx->STAT |= (1 << SPI_STAT_WTC_Pos);
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SPIx->DATA = data;
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while((SPIx->STAT & SPI_STAT_WTC_Msk) == 0);
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_ReadWrite()
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* 功能说明: 发送一个数据，并返回发送过程中接收到的
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t data 要发送的数据
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* 输 出: uint32_t 接收到的数据
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* 注意事项: 对于同一个SPI模块，此函数不应与SPI_Write()混着用，因为SPI_Write()不清除SPI_STAT_RFNE状态
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******************************************************************************************************************************************/
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uint32_t SPI_ReadWrite(SPI_TypeDef * SPIx, uint32_t data)
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{
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SPIx->DATA = data;
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while(!(SPIx->STAT & SPI_STAT_RFNE_Msk));
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return SPIx->DATA;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_IsRXEmpty()
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* 功能说明: 接收FIFO是否空，如果不空则可以继续SPI_Read()
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: uint32_t 1 接收FIFO空 0 接收FIFO非空
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SPI_IsRXEmpty(SPI_TypeDef * SPIx)
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{
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return (SPIx->STAT & SPI_STAT_RFNE_Msk) ? 0 : 1;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_IsTXFull()
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* 功能说明: 发送FIFO是否满，如果不满则可以继续SPI_Write()
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: uint32_t 1 发送FIFO满 0 发送FIFO不满
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SPI_IsTXFull(SPI_TypeDef * SPIx)
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{
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return (SPIx->STAT & SPI_STAT_TFNF_Msk) ? 0 : 1;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_IsTXEmpty()
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* 功能说明: 发送FIFO是否空
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* 输 出: uint32_t 1 发送FIFO空 0 发送FIFO非空
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SPI_IsTXEmpty(SPI_TypeDef * SPIx)
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{
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return (SPIx->STAT & SPI_STAT_TFE_Msk) ? 1 : 0;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_INTEn()
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* 功能说明: 中断使能
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t it interrupt type，有效值SPI_IT_RX_OVF、SPI_IT_RX_FULL、SPI_IT_RX_HFULL、SPI_IT_TX_EMPTY、SPI_IT_TX_HFULL、
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* SPI_IT_RX_THRES、SPI_IT_TX_THRES、SPI_IT_TX_DONE、SPI_IT_CS_FALL、SPI_IT_CS_RISE 及其“或”
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_INTEn(SPI_TypeDef * SPIx, uint32_t it)
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{
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SPIx->IE |= it;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_INTDis()
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* 功能说明: 中断禁止
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t it interrupt type，有效值SPI_IT_RX_OVF、SPI_IT_RX_FULL、SPI_IT_RX_HFULL、SPI_IT_TX_EMPTY、SPI_IT_TX_HFULL、
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* SPI_IT_RX_THRES、SPI_IT_TX_THRES、SPI_IT_TX_DONE、SPI_IT_CS_FALL、SPI_IT_CS_RISE 及其“或”
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_INTDis(SPI_TypeDef * SPIx, uint32_t it)
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{
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SPIx->IE &= ~it;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_INTClr()
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* 功能说明: 中断标志清除
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t it interrupt type，有效值SPI_IT_RX_OVF、SPI_IT_RX_FULL、SPI_IT_RX_HFULL、SPI_IT_TX_EMPTY、SPI_IT_TX_HFULL、
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* SPI_IT_RX_THRES、SPI_IT_TX_THRES、SPI_IT_TX_DONE、SPI_IT_CS_FALL、SPI_IT_CS_RISE 及其“或”
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void SPI_INTClr(SPI_TypeDef * SPIx, uint32_t it)
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{
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SPIx->IF = it;
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}
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/******************************************************************************************************************************************
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* 函数名称: SPI_INTStat()
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* 功能说明: 中断状态查询
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* uint32_t it interrupt type，有效值SPI_IT_RX_OVF、SPI_IT_RX_FULL、SPI_IT_RX_HFULL、SPI_IT_TX_EMPTY、SPI_IT_TX_HFULL、
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* SPI_IT_RX_THRES、SPI_IT_TX_THRES、SPI_IT_TX_DONE、SPI_IT_CS_FALL、SPI_IT_CS_RISE 及其“或”
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* 输 出: uint32_t 1 中断发生 0 中断未发生
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SPI_INTStat(SPI_TypeDef * SPIx, uint32_t it)
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{
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return (SPIx->IF & it) ? 1 : 0;
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}
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/******************************************************************************************************************************************
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* 函数名称: I2S_Init()
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* 功能说明: I2S音频串行接口初始化，包括帧格式、数据长度、时钟频率、中断设定、FIFO触发设定
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* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
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* I2S_InitStructure * initStruct 包含I2S相关设定值的结构体
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void I2S_Init(SPI_TypeDef * SPIx, I2S_InitStructure * initStruct)
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{
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switch((uint32_t)SPIx)
|
|||
|
|
{
|
|||
|
|
case ((uint32_t)SPI0):
|
|||
|
|
SYS->CLKEN0 |= (0x01 << SYS_CLKEN0_SPI0_Pos);
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case ((uint32_t)SPI1):
|
|||
|
|
SYS->CLKEN0 |= (0x01 << SYS_CLKEN0_SPI1_Pos);
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
I2S_Close(SPIx); //一些关键寄存器只能在SPI关闭时设置
|
|||
|
|
|
|||
|
|
SPIx->CTRL &= ~(SPI_CTRL_FFS_Msk | SPI_CTRL_RFTHR_Msk | SPI_CTRL_TFTHR_Msk);
|
|||
|
|
SPIx->CTRL |= (SPI_FORMAT_I2S << SPI_CTRL_FFS_Pos) |
|
|||
|
|
((initStruct->RXThreshold > 0 ? initStruct->RXThreshold-1 : 0) << SPI_CTRL_RFTHR_Pos) |
|
|||
|
|
(initStruct->TXThreshold << SPI_CTRL_TFTHR_Pos) |
|
|||
|
|
(1 << SPI_CTRL_RFCLR_Pos) |
|
|||
|
|
(1 << SPI_CTRL_TFCLR_Pos);
|
|||
|
|
SPIx->CTRL &= ~(SPI_CTRL_RFCLR_Msk | SPI_CTRL_TFCLR_Msk);
|
|||
|
|
|
|||
|
|
SPIx->I2SCR &= ~(SPI_I2SCR_MSTR_Msk | SPI_I2SCR_DIEN_Msk | SPI_I2SCR_DOEN_Msk | SPI_I2SCR_FFMT_Msk | SPI_I2SCR_DLEN_Msk | SPI_I2SCR_PCMSYNW_Msk);
|
|||
|
|
SPIx->I2SCR |= ((initStruct->Mode & 0x04 ? 1 : 0) << SPI_I2SCR_MSTR_Pos) |
|
|||
|
|
((initStruct->Mode & 0x02 ? 1 : 0) << SPI_I2SCR_DOEN_Pos) |
|
|||
|
|
((initStruct->Mode & 0x01 ? 1 : 0) << SPI_I2SCR_DIEN_Pos) |
|
|||
|
|
((initStruct->FrameFormat & 0x03) << SPI_I2SCR_FFMT_Pos) |
|
|||
|
|
(initStruct->DataLen << SPI_I2SCR_DLEN_Pos) |
|
|||
|
|
((initStruct->FrameFormat & 0x04 ? 1 : 0) << SPI_I2SCR_PCMSYNW_Pos);
|
|||
|
|
|
|||
|
|
SPIx->I2SPR &= ~SPI_I2SPR_SCLKDIV_Msk;
|
|||
|
|
SPIx->I2SPR |= (SystemCoreClock / initStruct->ClkFreq / 2 - 1) << SPI_I2SPR_SCLKDIV_Pos;
|
|||
|
|
|
|||
|
|
SPIx->IF = 0x37F; //清除中断标志
|
|||
|
|
SPIx->IE = 0x000;
|
|||
|
|
SPIx->IE |= (initStruct->RXThresholdIEn << SPI_IE_RFTHR_Pos) |
|
|||
|
|
(initStruct->TXThresholdIEn << SPI_IE_TFTHR_Pos) |
|
|||
|
|
(initStruct->TXCompleteIEn << SPI_IE_FTC_Pos);
|
|||
|
|
|
|||
|
|
switch((uint32_t)SPIx)
|
|||
|
|
{
|
|||
|
|
case ((uint32_t)SPI0):
|
|||
|
|
if(initStruct->RXThresholdIEn | initStruct->TXThresholdIEn | initStruct->TXCompleteIEn)
|
|||
|
|
{
|
|||
|
|
NVIC_EnableIRQ(SPI0_IRQn);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
NVIC_DisableIRQ(SPI0_IRQn);
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case ((uint32_t)SPI1):
|
|||
|
|
if(initStruct->RXThresholdIEn | initStruct->TXThresholdIEn | initStruct->TXCompleteIEn)
|
|||
|
|
{
|
|||
|
|
NVIC_EnableIRQ(SPI1_IRQn);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
NVIC_DisableIRQ(SPI1_IRQn);
|
|||
|
|
}
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/******************************************************************************************************************************************
|
|||
|
|
* 函数名称: I2S_Open()
|
|||
|
|
* 功能说明: I2S打开，允许收发
|
|||
|
|
* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
|
|||
|
|
* 输 出: 无
|
|||
|
|
* 注意事项: 无
|
|||
|
|
******************************************************************************************************************************************/
|
|||
|
|
void I2S_Open(SPI_TypeDef * SPIx)
|
|||
|
|
{
|
|||
|
|
SPIx->CTRL |= (0x01 << SPI_CTRL_EN_Pos); //使能SPI才能使用TX Complete中断
|
|||
|
|
SPIx->I2SCR |= (0x01 << SPI_I2SCR_EN_Pos);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/******************************************************************************************************************************************
|
|||
|
|
* 函数名称: I2S_Close()
|
|||
|
|
* 功能说明: I2S关闭，禁止收发
|
|||
|
|
* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
|
|||
|
|
* 输 出: 无
|
|||
|
|
* 注意事项: 无
|
|||
|
|
******************************************************************************************************************************************/
|
|||
|
|
void I2S_Close(SPI_TypeDef * SPIx)
|
|||
|
|
{
|
|||
|
|
SPIx->CTRL &= ~SPI_CTRL_EN_Msk;
|
|||
|
|
SPIx->I2SCR &= ~SPI_I2SCR_EN_Msk;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/******************************************************************************************************************************************
|
|||
|
|
* 函数名称: I2S_MCLKConfig()
|
|||
|
|
* 功能说明: I2S MCLK时钟输出配置
|
|||
|
|
* 输 入: SPI_TypeDef * SPIx 指定要被设置的SPI，有效值包括SPI0、SPI1
|
|||
|
|
* uint32_t output_enable 是否输出MCLK时钟
|
|||
|
|
* uint32_t mclk_freq MCLK时钟频率
|
|||
|
|
* 输 出: 无
|
|||
|
|
* 注意事项: 无
|
|||
|
|
******************************************************************************************************************************************/
|
|||
|
|
void I2S_MCLKConfig(SPI_TypeDef * SPIx, uint32_t output_enable, uint32_t mclk_freq)
|
|||
|
|
{
|
|||
|
|
if(output_enable)
|
|||
|
|
{
|
|||
|
|
SPIx->I2SPR &= ~SPI_I2SPR_MCLKDIV_Msk;
|
|||
|
|
SPIx->I2SPR |= (SystemCoreClock / mclk_freq / 2 - 1) << SPI_I2SPR_MCLKDIV_Pos;
|
|||
|
|
|
|||
|
|
SPIx->I2SCR |= (1 << SPI_I2SCR_MCLKOE_Pos);
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
SPIx->I2SCR &= ~(1 << SPI_I2SCR_MCLKOE_Pos);
|
|||
|
|
}
|
|||
|
|
}
|