MahnoKropotkinvich/xv6-labs-2024-solution
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Update uart.c

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added read of register ISR to clear interrupt source of UART16550.
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x653 2023-02-17 13:03:20 +01:00 committed by Frans Kaashoek
parent 343d1ab482
commit 72cb3849eb
1 changed files with 1 additions and 0 deletions
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kernel/uart.c
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@ -136,6 +136,7 @@ uartstart()
while(1){ while(1){
if(uart_tx_w == uart_tx_r){ if(uart_tx_w == uart_tx_r){
// transmit buffer is empty. // transmit buffer is empty.
ReadReg(ISR);
return; return;
} }