SPI.rar_ SPI_-spi_M25P40_SPI ADC_i2c

//====================================================================== // Name : SPI.c // Date : 2007/03/12 // Author : Xu // Comment: Driving MCP41010 // SPIMOSI0(GPE12) working is in master mode // SPICLK0(GPE13) is the master outpuc clock // GPG3 is master CS pin // Version: // History: 2007/03/12 Create //====================================================================== #include <windows.h> #include <types.h> #include <tchar.h> #include <cardserv.h> #include <cardapi.h> #include <tuple.h> #include <devload.h> #include <diskio.h> #include <nkintr.h> #include <oalintr.h> #include <windev.h> #include "s2410.h" #define PUBLIC volatile IOPreg * v_pIOPregs; volatile SSPreg *v_pSSPregs; BOOL SPI_InitAddrIO(VOID); BOOL SPI_InitAddrSPI(void); //====================================================================== // Name : InitSPI // Date : 2007/03/12 // Author : XuHaibo // Parameters: // Return : // Comment : // Version : // History : 2007/03/12 Create //====================================================================== void InitSPI(void) //init uart2 { unsigned int pclk = S2410PCLK; // s2410.h define // #define S2410FCLK (203 * 1000 * 1000) // 203MHz (FCLK). // #define PCLKDIV 4 // P-clock (PCLK) divisor. // #define S2410PCLK (S2410FCLK / PCLKDIV) // PCLK. // Set I/O is SPI interface // Config GPE12,13 is SPIMOSI0,SPICLK0 v_pIOPregs->rGPECON &= ~(0x0F << 24); v_pIOPregs->rGPECON |= (0x0A << 24); // Config GPG3 is Master SPI CS v_pIOPregs->rGPGCON &= ~(0x3 << 6); v_pIOPregs->rGPGCON |= (0x1 << 6); v_pIOPregs->rGPGUP &= ~(0x1 << 3); // Initialize CS is high v_pIOPregs->rGPGDAT |= (0x1 << 3); // Baudrate = PCLK/2/(Prescaler value + 1) // PCLK = 203000000/4 = 50750000 Hz // Prescaler value = 0x18 = 24 // Baudrate = 50750000/2/(24 + 1) = 1015000 = 1.015MHz // MCP41010 max clock frequency is 10MHz v_pSSPregs->rSPPRE0 = 0x18; // Set SPCON0 to configure properly the SPI module. // Master // SCK enable // polling mode v_pSSPregs->rSPCON0 = 0x18; // 0 Tx Auto Garbage Data mode enable (TAGD):Decide whether the receiving data only needs or not. // 0 = normal mode, 1 = Tx auto garbage data mode // NOTE: In normal mode, if you only want to receive data, // you should transmit dummy 0xFF data. // 1,2 It is possible to operate the devices in SPI modes 0,0and 1,1. (MCP41010 datasheet) // Set SPI mode is 0,0. // 3 Set S3C2410 is Master. // 4 SCK Enable (ENSCK) // 5,6 Determine how and by what SPTDAT is read/written. // 00 = polling mode, 01 = interrupt mode // 10 = DMA mode, 11 = reserved // Set polling mode } //====================================================================== // Name : InitSPI // Date : 2007/03/12 // Author : XuHaibo // Parameters: // Return : // Comment : // Version : // History : 2007/03/12 Create //====================================================================== BOOL SPI_InitAddrIO(VOID) { BOOL RetValue = TRUE; v_pIOPregs = (volatile IOPreg *)VirtualAlloc(0, sizeof(IOPreg), MEM_RESERVE, PAGE_NOACCESS); if (v_pIOPregs == NULL) { // ERRORMSG(1,(TEXT("For SPI_IOPregs : VirtualAlloc failed!\r\n"))); RetValue = FALSE; } else { if (!VirtualCopy((PVOID)v_pIOPregs, (PVOID)(IOP_BASE), sizeof(IOPreg), PAGE_READWRITE | PAGE_NOCACHE)) { // ERRORMSG(1,(TEXT("For SPI_IOPregs: VirtualCopy failed!\r\n"))); RetValue = FALSE; } } if (!RetValue) { // RETAILMSG (1, (TEXT("::: SPI_InitializeAddresses - Fail!!\r\n") )); if (v_pIOPregs) { VirtualFree((PVOID) v_pIOPregs, 0, MEM_RELEASE); } v_pIOPregs = NULL; } else { ; // RETAILMSG (1, (TEXT("::: SPI_InitializeAddresses - Success\r\n") )); } return(RetValue); } //====================================================================== // Name : InitSPI // Date : 2007/03/12 // Author : XuHaibo // Parameters: // Return : // Comment : // Version : // History : 2007/03/12 Create //====================================================================== BOOL SPI_InitAddrSPI(void) { BOOL RetValue = TRUE; // RETAILMSG (1, (TEXT("SPI_InitializeAddresses \r\n") )); v_pSSPregs = (volatile SSPreg *)VirtualAlloc(0, sizeof(UART2reg), MEM_RESERVE, PAGE_NOACCESS); if (v_pSSPregs == NULL) { // ERRORMSG(1,(TEXT("For SPI_UART2regs : VirtualAlloc failed!\r\n"))); RetValue = FALSE; } else { if (!VirtualCopy((PVOID)v_pSSPregs, (PVOID)(UART2_BASE), sizeof(UART2reg), PAGE_READWRITE | PAGE_NOCACHE)) { // ERRORMSG(1,(TEXT("For SPI_UART2regs: VirtualCopy failed!\r\n"))); RetValue = FALSE; } } if (!RetValue) { // RETAILMSG (1, (TEXT("::: SPI_InitializeAddresses - Fail!!\r\n") )); if (v_pSSPregs) { VirtualFree((PVOID) v_pSSPregs, 0, MEM_RELEASE); } v_pSSPregs = NULL; } else { ; // RETAILMSG (1, (TEXT("SPI_InitializeAddresses - Success\r\n") )); } return(RetValue); }