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Fix UART write logic issue

pull/11888/head
fred.li 2019-07-18 14:31:12 +08:00
parent cef6aba55e
commit 79f06c7b6c
1 changed files with 4 additions and 4 deletions
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8
targets/TARGET_RDA/TARGET_UNO_91H/serial_api.c
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@ -321,7 +321,7 @@ int serial_getc(serial_t *obj)
void serial_putc(serial_t *obj, int c)
{
while (serial_writable(obj));
while (!serial_writable(obj));
obj->uart->THR = c;
}
@ -334,12 +334,12 @@ int serial_writable(serial_t *obj)
{
int isWritable = 1;
if (obj->index == 0) {
return (obj->uart->FSR & TXFIFO_FULL_MASK); // uart0 not have flow control
return !(obj->uart->FSR & TXFIFO_FULL_MASK); // uart0 not have flow control
} else {
if (((obj->uart->MCR & AFCE_MASK) == 0x00UL) && (NC != uart_data[obj->index].sw_cts.pin)) //If flow control: writable if CTS low + UART done
isWritable = (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->FSR & TXFIFO_FULL_MASK);
isWritable = (gpio_read(&uart_data[obj->index].sw_cts) == 0) && !(obj->uart->FSR & TXFIFO_FULL_MASK);
else
isWritable = (obj->uart->FSR & TXFIFO_FULL_MASK);
isWritable = !(obj->uart->FSR & TXFIFO_FULL_MASK);
return isWritable;
}
}