diff options
Diffstat (limited to 'openpcd/firmware/src/start/Cstartup_SAM7.c')
-rw-r--r-- | openpcd/firmware/src/start/Cstartup_SAM7.c | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/openpcd/firmware/src/start/Cstartup_SAM7.c b/openpcd/firmware/src/start/Cstartup_SAM7.c deleted file mode 100644 index 66dbe20..0000000 --- a/openpcd/firmware/src/start/Cstartup_SAM7.c +++ /dev/null @@ -1,89 +0,0 @@ -//*---------------------------------------------------------------------------- -//* ATMEL Microcontroller Software Support - ROUSSET - -//*---------------------------------------------------------------------------- -//* The software is delivered "AS IS" without warranty or condition of any -//* kind, either express, implied or statutory. This includes without -//* limitation any warranty or condition with respect to merchantability or -//* fitness for any particular purpose, or against the infringements of -//* intellectual property rights of others. -//*---------------------------------------------------------------------------- -//* File Name : Cstartup_SAM7.c -//* Object : Low level initializations written in C for GCC Tools -//* Creation : 12/Jun/04 -//* 1.2 28/Feb/05 JPP : LIB change AT91C_WDTC_WDDIS & PLL -//* 1.3 21/Mar/05 JPP : Change PLL Wait time -//*---------------------------------------------------------------------------- - -// Include the board file description -#include <board.h> - -// The following functions must be write in ARM mode this function called directly -// by exception vector -extern void AT91F_Spurious_handler (void); -extern void AT91F_Default_IRQ_handler (void); -extern void AT91F_Default_FIQ_handler (void); - -//*---------------------------------------------------------------------------- -//* \fn AT91F_LowLevelInit -//* \brief This function performs very low level HW initialization -//* this function can be use a Stack, depending the compilation -//* optimization mode -//*---------------------------------------------------------------------------- -void -AT91F_LowLevelInit (void) -{ - int i; - AT91PS_PMC pPMC = AT91C_BASE_PMC; - //* Set Flash Waite sate - // Single Cycle Access at Up to 30 MHz, or 40 - // if MCK = 47923200 I have 50 Cycle for 1 usecond ( flied MC_FMR->FMCN - AT91C_BASE_MC->MC_FMR = ((AT91C_MC_FMCN) & (48 << 16)) | AT91C_MC_FWS_1FWS; - - //* Watchdog Disable - AT91C_BASE_WDTC->WDTC_WDMR = AT91C_WDTC_WDDIS; - - //* Set MCK at 47 923 200 - // 1 Enabling the Main Oscillator: - // SCK = 1/32768 = 30.51 uSecond - // Start up time = 8 * 6 / SCK = 56 * 30.51 = 1,46484375 ms - pPMC->PMC_MOR = ((AT91C_CKGR_OSCOUNT) & (0x06 << 8)) | AT91C_CKGR_MOSCEN; - // Wait the startup time - while (!(pPMC->PMC_SR & AT91C_PMC_MOSCS)); - // 2 Checking the Main Oscillator Frequency (Optional) - // 3 Setting PLL and divider: - // - div by 24 Fin = 0,7680 =(18,432 / 24) - // - Mul 125: Fout = 96,0000 =(0,7680 *125) - // for 96 MHz the erroe is 0.16% - // Field out NOT USED = 0 - // PLLCOUNT pll startup time estimate at : 0.844 ms - // PLLCOUNT 28 = 0.000844 /(1/32768) -#if 0 - pPMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x05) | - (AT91C_CKGR_PLLCOUNT & (28 << 8)) | - (AT91C_CKGR_MUL & (25 << 16))); -#else - pPMC->PMC_PLLR = ((AT91C_CKGR_DIV & 24) | - (AT91C_CKGR_PLLCOUNT & (28 << 8)) | - (AT91C_CKGR_MUL & (125 << 16))); -#endif - - // Wait the startup time - while (!(pPMC->PMC_SR & AT91C_PMC_LOCK)); - while (!(pPMC->PMC_SR & AT91C_PMC_MCKRDY)); - // 4. Selection of Master Clock and Processor Clock - // select the PLL clock divided by 2 - pPMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; - while (!(pPMC->PMC_SR & AT91C_PMC_MCKRDY)); - - pPMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK; - while (!(pPMC->PMC_SR & AT91C_PMC_MCKRDY)); - - // Set up the default interrupts handler vectors - AT91C_BASE_AIC->AIC_SVR[0] = (int) AT91F_Default_FIQ_handler; - for (i = 1; i < 31; i++) - { - AT91C_BASE_AIC->AIC_SVR[i] = (int) AT91F_Default_IRQ_handler; - } - AT91C_BASE_AIC->AIC_SPU = (int) AT91F_Spurious_handler; - -} |