SPI.rar_ wince spi_6410 SPI WINCE_s3c6410 spi wince_wince spi_wi

//------------------------------------------------------------------------------------------------------------------------- // Copyright (c) Samsung Electronics Co., Ltd. All rights reserved. //------------------------------------------------------------------------------------------------------------------------- // // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, // INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE. // // Module Name : SPI.C // // Abstract : SPI Interface Routines for Samsung S3C6410 CPU // // Environment : Samsung S3C6410 / WinCE6.0 // // 2007/06/ // //------------------------------------------------------------------------------------------------------------------------- #include <windows.h> //#include <types.h> // #include <nkintr.h> #include <ceddk.h> //For DMA Buffer Alloc #include <memory.h> //#include <bsp_cfg.h> #include <s3c6410.h> // for 6410 #include <DrvLib.h> #include "spi.h" #include "oal_intr.h" #include "s3c6410_dma_controller.h" #define MASTER_CS_ENABLE pSPIregs->SLAVE_SEL = 0 #define MASTER_CS_DISABLE pSPIregs->SLAVE_SEL = 1 #define TRAIL_CNT(n) (((n)&0x3FF)<<19)//将计数接收缓冲区的寄存器值初始化为最大。19bit-28bit全为1. #define SPI_POWER_ON (1<<21) #define SPI_SCLK_ON (1<<20) #define SPI_USBHOST_ON (1<<22) #define PCLOCK (0) #define USB_HOST_CLOCK (1) #define EPLL_CLOCK (2) #define SPI_CLOCK EPLL_CLOCK //#define TEST_MODE //#define POLLING // MSG #define SPI_MSG 0 #define SPI_INIT 1 volatile S3C6410_SPI_REG *pRestoreSPIregs = NULL; #define WRITE_TIME_OUT_CONSTANT 5000 #define WRITE_TIME_OUT_MULTIPLIER 1 #define READ_TIME_OUT_CONSTANT 5000 #define READ_TIME_OUT_MULTIPLIER 1 DWORD HW_Init(PSPI_PUBLIC_CONTEXT pPublicSpi);//函数的声明 DWORD ThreadForTx(PSPI_PUBLIC_CONTEXT pPublicSpi); DWORD ThreadForRx(PSPI_PUBLIC_CONTEXT pPublicSpi); DWORD ThreadForSpi(PSPI_PUBLIC_CONTEXT pPublicSpi); DWORD ThreadForRxDmaDone(PSPI_PUBLIC_CONTEXT pPublicSpi); DWORD ThreadForTxDmaDone(PSPI_PUBLIC_CONTEXT pPublicSpi); static DMA_CH_CONTEXT g_OutputDMA; static DMA_CH_CONTEXT g_InputDMA; //DMA //UINT nDmaLen; UINT DmaDstAddress; UINT DmaSrcAddress; //DMA Buffer Address Alloc #define Buffer_Mem_Size 1504 //1024 //Memory Physical Address PHYSICAL_ADDRESS g_PhysDmaDstBufferAddr; PHYSICAL_ADDRESS g_PhysDmaSrcBufferAddr; // DMA Buffer Address Alloc PBYTE pVirtDmaDstBufferAddr = NULL; PBYTE pVirtDmaSrcBufferAddr = NULL; BOOL DllEntry( //入口函数 HINSTANCE hinstDll, DWORD dwReason, LPVOID lpReserved ) { if ( dwReason == DLL_PROCESS_ATTACH ) { DEBUGMSG (1, (TEXT("[SPI] Process Attach\r\n"))); } if ( dwReason == DLL_PROCESS_DETACH ) { DEBUGMSG (1, (TEXT("[SPI] Process Detach\r\n"))); } return(TRUE); } DWORD HW_Init( //初始化函数 PSPI_PUBLIC_CONTEXT pPublicSpi ) { BOOL bResult = TRUE; if ( !pPublicSpi ) { return FALSE; } // GPIO Virtual alloc pPublicSpi->pGPIOregs = (volatile S3C6410_GPIO_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_GPIO, sizeof(S3C6410_GPIO_REG), FALSE); if (pPublicSpi->pGPIOregs == NULL) { RETAILMSG(SPI_INIT,(TEXT("[SPI] For pGPIOregs: DrvLib_MapIoSpace failed!\r\n"))); bResult = FALSE; goto CleanUp; } // HS-SPI Virtual alloc pPublicSpi->pSPIregs = (volatile S3C6410_SPI_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_SPI0, sizeof(S3C6410_SPI_REG), FALSE); if (pPublicSpi->pSPIregs == NULL) { RETAILMSG(SPI_INIT,(TEXT("[SPI] For pSPIregs: DrvLib_MapIoSpace failed!\r\n"))); bResult = FALSE; goto CleanUp; } // Syscon Virtual alloc 系统控制器寄存器的地址分配 system controller registers的虚拟地址分配。 pPublicSpi->pSYSCONregs = (volatile S3C6410_SYSCON_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_SYSCON, sizeof(S3C6410_SYSCON_REG), FALSE); if (pPublicSpi->pSYSCONregs == NULL) { RETAILMSG(SPI_INIT,(TEXT("[SPI] For pSYSCONregs: DrvLib_MapIoSpace failed!\r\n"))); bResult = FALSE; goto CleanUp; } // DMAC0 Virtual alloc DMA控制器的CPU寄存器的虚拟地址分配（可以看出SPI通信是DMA方式） pPublicSpi->pDMAC0regs = (volatile S3C6410_DMAC_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_DMA0, sizeof(S3C6410_DMAC_REG), FALSE); if (pPublicSpi->pDMAC0regs == NULL) { RETAILMSG(SPI_INIT,(TEXT("[SPI] For pDMAC0regs: DrvLib_MapIoSpace failed!\r\n"))); bResult = FALSE; goto CleanUp; } // DMAC1 Virtual alloc pPublicSpi->pDMAC1regs = (volatile S3C6410_DMAC_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_DMA1, sizeof(S3C6410_DMAC_REG), FALSE); if (pPublicSpi->pDMAC1regs == NULL) { RETAILMSG(SPI_INIT,(TEXT("[SPI] For pDMAC1regs: DrvLib_MapIoSpace failed!\r\n"))); bResult = FALSE; goto CleanUp; } CleanUp://标志 if (!bResult) { if (pPublicSpi->pGPIOregs) { DrvLib_UnmapIoSpace((PVOID)pPublicSpi->pGPIOregs); pPublicSpi->pGPIOregs = NULL; } if (pPublicSpi->pSPIregs) { DrvLib_UnmapIoSpace((PVOID)pPublicSpi->pSPIregs); pPublicSpi->pSPIregs = NULL; } if (pPublicSpi->pDMAC0regs) { DrvLib_UnmapIoSpace((PVOID)pPublicSpi->pDMAC0regs); pPublicSpi->pDMAC0regs = NULL; } if (pPublicSpi->pDMAC1regs) { DrvLib_UnmapIoSpace((PVOID)pPublicSpi->pDMAC1regs); pPublicSpi->pDMAC1regs = NULL; } if (pPublicSpi->pSYSCONregs) { DrvLib_UnmapIoSpace((PVOID)pPublicSpi->pSYSCONregs); pPublicSpi->pSYSCONregs = NULL; } return FALSE; } #if (CPU_NAME == S3C6410) //Configure HS-SPI Port Drive Strength pPublicSpi->pGPIOregs->SPCON = pPublicSpi->pGPIOregs->SPCON & ~(0x3<<28) | (2<<28); #endif //Set GPIO for MISO, MOSI, SPICLK, SS设置SPI0对应的引脚工作为SPI工作模式 pPublicSpi->pGPIOregs->GPCPUD = pPublicSpi->pGPIOregs->GPCPUD & ~(0xFF<<0); pPublicSpi->pGPIOregs->GPCCON = pPublicSpi->pGPIOregs->GPCCON & ~(0xFFFF<<0) | (2<<0) | (2<<4) | (2<<8) |(2<<12);//最后GPCCON的值为0x5555（先按位取反，再按位与，最后按位或） // Clock On pPublicSpi->pSYSCONregs->PCLK_GATE |= SPI_POWER_ON; #if (SPI_CLOCK == EPLL_CLOCK) pPublicSpi->pSYSCONregs->SCLK_GATE |= SPI_SCLK_ON; #elif (SPI_CLOCK == USB_HOST_CLOCK) pPublicSpi->pSYSCONregs->SCLK_GATE |= SPI_USBHOST_ON; #endif DMA_initialize_register_address((void *)pPublicSpi->pDMAC0regs, (void *)pPublicSpi->pDMAC1regs, (void *)pPublicSpi->pSYSCONregs);//将申请到的虚拟地址进行初始化。 return TRUE; } BOOL InitializeBuffer() //寄存器初始化 { DMA_ADAPTER_OBJECT Adapter1, Adapter2; RETAILMSG(SPI_INIT,(TEXT("+[SPI] InitializeBuffer\n"))); memset(&Adapter1, 0, sizeof(DMA_ADAPTER_OBJECT)); Adapter1.InterfaceType = Internal; Adapter1.ObjectSize = sizeof(DMA_ADAPTER_OBJECT); memset(&Adapter2, 0, sizeof(DMA_ADAPTER_OBJECT)); Adapter2.InterfaceType = Internal; Adapter2.ObjectSize = sizeof(DMA_ADAPTER_OBJECT); // Allocate a block of virtual memory (physically contiguous) for the DMA buffers. // pVirtDmaDstBufferAddr = (PBYTE)HalAllocateCommonBuffer(&Adapter1, Buffer_Mem_Size, &g_PhysDmaDstBufferAddr, FALSE); //为Adapter1分配一个Buffer_Mem_Size大小的内存，这个函数分配的内存是专用于