diff options
Diffstat (limited to 'demos/ARM7-AT91SAM7X-GCC/board.c')
| -rw-r--r-- | demos/ARM7-AT91SAM7X-GCC/board.c | 82 |
1 files changed, 64 insertions, 18 deletions
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 <ch.h>
-#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;
}
|