From 53b6f6d8df525c3f71d230c6ed2be39c64c871a5 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Mon, 18 Feb 2008 15:53:48 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@193 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- demos/ARM7-AT91SAM7X-GCC/board.c | 82 +++++++++++++++++++++++++++++++--------- 1 file changed, 64 insertions(+), 18 deletions(-) (limited to 'demos/ARM7-AT91SAM7X-GCC/board.c') diff --git a/demos/ARM7-AT91SAM7X-GCC/board.c b/demos/ARM7-AT91SAM7X-GCC/board.c index bc0d46189..fac56f18d 100644 --- a/demos/ARM7-AT91SAM7X-GCC/board.c +++ b/demos/ARM7-AT91SAM7X-GCC/board.c @@ -19,7 +19,8 @@ #include -#include "at91lib/AT91SAM7X256.h" +#include "board.h" +#include "at91lib/aic.h" extern void FiqHandler(void); @@ -29,10 +30,24 @@ static void SpuriousHandler(void) { AT91C_BASE_AIC->AIC_EOICR = (AT91_REG)AT91C_BASE_AIC; } +/* + * Timer 0 IRQ handling here. + */ +__attribute__((naked)) +static void SYSIrqHandler(void) { + + chSysIRQEnterI(); + + if (AT91C_BASE_PITC->PITC_PISR & AT91C_PITC_PITS) { + chSysTimerHandlerI(); + (void) AT91C_BASE_PITC->PITC_PIVR; + } + + chSysIRQExitI(); +} + void hwinit(void) { int i; - AT91PS_PMC pmcp = AT91C_BASE_PMC; - AT91PS_AIC aicp = AT91C_BASE_AIC; /* * Flash Memory: 1 wait state, about 50 cycles in a microsecond. @@ -47,40 +62,71 @@ void hwinit(void) { /* * Enables the main oscillator and waits 56 slow cycles as startup time. */ - pmcp->PMC_MOR = (AT91C_CKGR_OSCOUNT & (7 << 8)) | AT91C_CKGR_MOSCEN; - while (!(pmcp->PMC_SR & AT91C_PMC_MOSCS)) + AT91C_BASE_PMC->PMC_MOR = (AT91C_CKGR_OSCOUNT & (7 << 8)) | AT91C_CKGR_MOSCEN; + while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS)) ; /* * PLL setup: DIV = 14, MUL = 72, PLLCOUNT = 10 * PLLfreq = 96109714 Hz (rounded) */ - pmcp->PMC_PLLR = (AT91C_CKGR_DIV & 14) | - (AT91C_CKGR_PLLCOUNT & (10 << 8)) | - (AT91C_CKGR_MUL & (72 << 16)); - while (!(pmcp->PMC_SR & (AT91C_PMC_LOCK))) + AT91C_BASE_PMC->PMC_PLLR = (AT91C_CKGR_DIV & 14) | + (AT91C_CKGR_PLLCOUNT & (10 << 8)) | + (AT91C_CKGR_MUL & (72 << 16)); + while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK)) ; /* * Master clock = PLLfreq / 2 = 48054858 Hz (rounded) */ - pmcp->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | AT91C_PMC_PRES_CLK_2; - while (!(pmcp->PMC_SR & (AT91C_PMC_MCKRDY))) + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_PLL_CLK | AT91C_PMC_PRES_CLK_2; + while (!(AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY)) ; + /* + * I/O setup, enable clocks, initially all pins are inputs with pullups. + */ + AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_PIOA) | (1 << AT91C_ID_PIOB); + AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; + AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF; + /* * Default AIC setup, the device drivers will modify it as needed. */ - aicp->AIC_SVR[0] = (AT91_REG)FiqHandler; + AT91C_BASE_AIC->AIC_ICCR = 0xFFFFFFFF; + AT91C_BASE_AIC->AIC_SVR[0] = (AT91_REG)FiqHandler; for (i = 1; i < 31; i++) { - aicp->AIC_SVR[i] = (AT91_REG)NULL; - aicp->AIC_EOICR = (AT91_REG)i; + AT91C_BASE_AIC->AIC_SVR[i] = (AT91_REG)NULL; + AT91C_BASE_AIC->AIC_EOICR = (AT91_REG)i; } - aicp->AIC_SPU = (AT91_REG)SpuriousHandler; + AT91C_BASE_AIC->AIC_SPU = (AT91_REG)SpuriousHandler; /* - * I/O setup, enable clocks, initially all pins are inputs with pullups. + * LCD pins setup. */ - pmcp->PMC_PCER = (1 << AT91C_ID_PIOA) | (1 << AT91C_ID_PIOB); - AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; + AT91C_BASE_PIOB->PIO_SODR = PIOB_LCD_BL; // Set to high. + AT91C_BASE_PIOB->PIO_OER = PIOB_LCD_BL; // Configure as output. + AT91C_BASE_SYS->PIOA_PPUDR = PIOB_LCD_BL; // Disable internal pullup resistor. + + AT91C_BASE_PIOA->PIO_SODR = PIOA_LCD_RESET; // Set to high. + AT91C_BASE_PIOA->PIO_OER = PIOA_LCD_RESET; // Configure as output. + AT91C_BASE_SYS->PIOB_PPUDR = PIOA_LCD_RESET; // Disable internal pullup resistor. + + /* + * Joystick and buttons, disable pullups, already inputs. + */ + AT91C_BASE_SYS->PIOA_PPUDR = PIOA_B1 | PIOA_B2 | PIOA_B3 | PIOA_B4 | PIOA_B5; + AT91C_BASE_SYS->PIOB_PPUDR = PIOB_SW1 | PIOB_SW2; + + /* + * MMC/SD slot, disable pullups, already inputs. + */ + AT91C_BASE_SYS->PIOB_PPUDR = PIOB_MMC_WP | PIOB_MMC_CP; + + /* + * PIT Initialization. + */ + AIC_ConfigureIT(AT91C_ID_SYS, AT91C_AIC_SRCTYPE_POSITIVE_EDGE, SYSIrqHandler); + AT91C_BASE_PITC->PITC_PIMR = (MCK / 16 / CH_FREQUENCY) - 1; + AT91C_BASE_PITC->PITC_PIMR |= AT91C_PITC_PITEN | AT91C_PITC_PITIEN; } -- cgit v1.2.3