0f066befeb
This should remove a race condition in the case that some uart event occurs after the uart0 thread has started and before control has returned to the calling thread, as uart0_handler_pid would not have been set yet.
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#include <chardev_thread.h>
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#include <ringbuffer.h>
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#include <stdio.h>
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#include <thread.h>
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#include <msg.h>
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#include <posix_io.h>
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#include <board_uart0.h>
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#define UART0_BUFSIZE (32)
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#define UART0_STACKSIZE (MINIMUM_STACK_SIZE + 256)
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ringbuffer_t uart0_ringbuffer;
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int uart0_handler_pid;
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static char buffer[UART0_BUFSIZE];
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static char uart0_thread_stack[UART0_STACKSIZE];
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static void uart0_loop(void)
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{
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chardev_loop(&uart0_ringbuffer);
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}
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void board_uart0_init(void)
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{
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ringbuffer_init(&uart0_ringbuffer, buffer, UART0_BUFSIZE);
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int pid = thread_create(uart0_thread_stack, sizeof(uart0_thread_stack), PRIORITY_MAIN - 1, CREATE_STACKTEST|CREATE_WOUT_YIELD, uart0_loop, "uart0");
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uart0_handler_pid = pid;
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puts("uart0_init() [OK]");
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}
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void uart0_handle_incoming(int c)
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{
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rb_add_element(&uart0_ringbuffer, c);
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}
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void uart0_notify_thread(void)
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{
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msg_t m;
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m.type = 0;
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msg_send_int(&m, uart0_handler_pid);
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}
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int uart0_readc(void)
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{
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char c = 0;
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posix_read(uart0_handler_pid, &c, 1);
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return c;
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}
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void uart0_putc(int c)
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{
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putchar(c);
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}
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