contiki/lib/uart1.c

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2010-03-09 23:23:40 +00:00
#include <mc1322x.h>
#include <types.h>
volatile char u1_tx_buf[1024];
volatile uint32_t u1_head, u1_tail;
void uart1_isr(void) {
while( *UART1_UTXCON != 0 ) {
if (u1_head == u1_tail) {
disable_irq(UART1);
return;
}
*UART1_UDATA = u1_tx_buf[u1_tail];
u1_tail++;
if (u1_tail >= sizeof(u1_tx_buf))
u1_tail = 0;
}
enable_irq(UART1);
}
void uart1_putc(char c) {
2010-03-09 23:23:40 +00:00
uint32_t h = u1_head;
h = u1_head + 1;
if (h >= sizeof(u1_tx_buf))
h = 0;
if (h == u1_tail) /* drop chars when no room */
return;
u1_tx_buf[u1_head] = c;
u1_head = h;
uart1_isr();
}
uint8_t uart1_getc(void) {
while(uart1_can_get() == 0) { continue; }
return *UART1_UDATA;
}