31 lines
687 B
C
31 lines
687 B
C
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/* See LICENSE of license details. */
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "platform.h"
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#include "stub.h"
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ssize_t __wrap_read(int fd, void* ptr, size_t len)
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{
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uint8_t * current = (uint8_t *)ptr;
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volatile uint32_t * uart_rx = (uint32_t *)(UART0_BASE_ADDR + UART_REG_RXFIFO);
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volatile uint8_t * uart_rx_cnt = (uint8_t *)(UART0_BASE_ADDR + UART_REG_RXCTRL + 2);
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ssize_t result = 0;
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if (isatty(fd)) {
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for (current = (uint8_t *)ptr;
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(current < ((uint8_t *)ptr) + len) && (*uart_rx_cnt > 0);
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current ++) {
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*current = *uart_rx;
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result++;
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}
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return result;
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}
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return _stub(EBADF);
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}
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