19 lines
632 B
C
19 lines
632 B
C
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#define GPIO_BASE 0x6000d000
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void _start() {
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*(volatile unsigned int *)(0x60006010) |= (1 << 8);
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*(volatile unsigned int *)(GPIO_BASE + 0x500 + 0x14) = 0xFF; // Port U OE
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*(volatile unsigned int *)(GPIO_BASE + 0x600 + 0x14) = 0xFF; // Port V OE
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*(volatile unsigned int *)(GPIO_BASE + 0x500 + 0x10) = 0xFF; // Port U CNF
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*(volatile unsigned int *)(GPIO_BASE + 0x600 + 0x10) = 0xFF; // Port V CNF
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while (1) {
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*(volatile unsigned int *)(GPIO_BASE + 0x500 + 0x18) ^= 0xFF;
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*(volatile unsigned int *)(GPIO_BASE + 0x600 + 0x18) ^= 0xFF;
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for (volatile int i = 0; i < 200000; i++)
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; // Visible delay
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}
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}
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