54 lines
966 B
C++
Executable File
54 lines
966 B
C++
Executable File
/*
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* JZ47xx GPIO lines
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*
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* Written 2010 by Andres Calderon andres.calderon@emqbit.com
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*/
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#include "jz47xx_mmap.h"
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unsigned int *
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jz_mmap (off_t address)
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{
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int fd;
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unsigned int *pio;
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if ((fd = open ("/dev/mem", O_RDWR | O_SYNC)) == -1)
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{
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fprintf (stderr, "Cannot open /dev/mem.\n");
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return 0;
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}
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pio = (unsigned int *) mmap (0, getpagesize (), PROT_READ | PROT_WRITE, MAP_SHARED, fd, address);
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if (pio == (unsigned int *) -1)
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{
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fprintf (stderr, "Cannot mmap.\n");
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return 0;
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}
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return pio;
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}
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void
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jz_cs2_init()
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{
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JZ_PIO *pio;
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pio = jz_gpio_map (CS2_PORT);
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jz_gpio_as_func (pio, CS2_PIN, 0);
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virt_addr = (JZ_REG *) (jz_mmap(0x13010000) + 0x18);
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if (*virt_addr != 0x0FFF7700)
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{
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*virt_addr = 0x0FFF7700;
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printf ("ADC: Configuring CS2 8 bits and 0 WS: %08X\n", *virt_addr);
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}
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else
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printf ("ADC: CS2, already configured: %08X\n", *virt_addr);
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virt_addr = (JZ_REG *) jz_mmap (0x14000000);
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}
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