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improve os_printf handling when buffer full.

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- wait for free buffer in hw fifo
This commit is contained in:
Markus Sattler 2015-05-17 13:43:49 +02:00
parent e0f9a4173e
commit 5b5deb5a77
1 changed files with 31 additions and 15 deletions
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16
cores/esp8266/HardwareSerial.cpp
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@ -400,6 +400,14 @@ void uart0_write_char(char c) {
return; return;
} }
} }
// wait for the Hardware FIFO
while(true) {
if(((USS(0) >> USTXC) & 0xff) <= (UART_TX_FIFO_SIZE - 2)) {
break;
}
}
if(c == '\n') { if(c == '\n') {
USF(0) = '\r'; USF(0) = '\r';
} }
@ -416,6 +424,14 @@ void uart1_write_char(char c) {
return; return;
} }
} }
// wait for the Hardware FIFO
while(true) {
if(((USS(1) >> USTXC) & 0xff) <= (UART_TX_FIFO_SIZE - 2)) {
break;
}
}
if(c == '\n') { if(c == '\n') {
USF(1) = '\r'; USF(1) = '\r';
} }