diff options
Diffstat (limited to 'platform/kendryte/k210/uarths.c')
-rw-r--r-- | platform/kendryte/k210/uarths.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/platform/kendryte/k210/uarths.c b/platform/kendryte/k210/uarths.c deleted file mode 100644 index 67d5d1c..0000000 --- a/platform/kendryte/k210/uarths.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * SPDX-License-Identifier: Apache-2.0 - * - * Copyright 2018 Canaan Inc. - * Copyright (c) 2019 Western Digital Corporation or its affiliates. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "sysctl.h" -#include "uarths.h" - -static volatile struct uarths *const uarths = - (volatile struct uarths *)UARTHS_BASE_ADDR; - -void uarths_init(u32 baud_rate, enum uarths_stopbit stopbit) -{ - u32 freq = sysctl_get_cpu_freq(); - u16 div = freq / baud_rate - 1; - - /* Set UART registers */ - uarths->div.div = div; - uarths->txctrl.nstop = stopbit; - uarths->txctrl.txen = 1; - uarths->rxctrl.rxen = 1; - uarths->txctrl.txcnt = 0; - uarths->rxctrl.rxcnt = 0; - uarths->ip.txwm = 1; - uarths->ip.rxwm = 0; - uarths->ie.txwm = 1; - uarths->ie.rxwm = 0; - - /* Clear input */ - if (!uarths->rxdata.empty) - (void)uarths_getc(); -} - -void uarths_putc(char c) -{ - while (uarths->txdata.full) - ; - - uarths->txdata.data = (u8)c; -} - -int uarths_getc(void) -{ - struct uarths_rxdata rx = uarths->rxdata; - - if (rx.empty) - return -1; - - return rx.data; -} |