mirror of
git://projects.qi-hardware.com/ben-blinkenlights.git
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70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
/*
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* Test code for the Tornado CPU board
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*/
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#include <stddef.h>
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#include <stdint.h>
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extern uint32_t _data_flash;
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extern uint32_t _data_begin;
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extern uint32_t _data_end;
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extern uint32_t _bss_end;
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extern uint32_t _stack_end;
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extern uint32_t _neg_stack_end;
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#define IOCONFIG 0x40044000
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#define GPIO_BASE_0 0x50000000
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#define GPIO0DATA (GPIO_BASE_0+0x3ffc)
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#define GPIO0DIR (GPIO_BASE_0+0x8000)
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/* LED is on PIO0_5 */
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int main(int argc, char **argv)
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{
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volatile uint32_t *data = (void *) GPIO0DATA;
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volatile uint32_t *dir = (void *) GPIO0DIR;
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uint32_t mask = 0;
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uint32_t loop;
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*dir = 1 << 5;
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while (1) {
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*data = mask;
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mask ^= 1 << 5;
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for (loop = 100000; loop; loop--);
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}
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}
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void __attribute__((naked, section(".init"))) __init(void)
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{
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register uint32_t *t = &_data_begin;
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register uint32_t *s = &_data_flash;
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while (t != &_data_end)
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*t++ = *s++;
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while (t != &_bss_end)
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*t++ = 0;
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main(0, NULL);
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}
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#define INITIAL_SP ((uint32_t) &_stack_end)
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#define NEG_INITIAL_SP ((uint32_t) &_neg_stack_end)
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#define VECTORS 8
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uint32_t __vectors[VECTORS] __attribute__((section(".vectors"))) = {
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INITIAL_SP, /* initial SP value @@@ */
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VECTORS*4+1, /* reset */
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0, /* NMI */
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0, /* HardFault */
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0, /* reserved */
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0, /* reserved */
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0, /* reserved */
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NEG_INITIAL_SP-(VECTORS*4+1),/* checksum */
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};
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