58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
// Blocking serial port.
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//
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// Copyright 2015 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "serial.h"
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#include "board.h"
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/// Initialise the hardware.
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void Serial::init() {
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Chip_UART_Init(LPC_USART0);
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Chip_Clock_SetUARTClockDiv(ClockDiv);
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handle_ = LPC_UARTD_API->uart_setup(
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LPC_USART0_BASE, static_cast<uint8_t*>(static_cast<void*>(mem_)));
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UART_CONFIG_T cfg = {
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.sys_clk_in_hz = CONFIG_SYS_FREQ / ClockDiv,
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.baudrate_in_hz = 115200,
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.config = 1,
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.sync_mod = 0,
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.error_en = NO_ERR_EN,
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};
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auto frg = LPC_UARTD_API->uart_init(handle_, &cfg);
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Chip_SYSCTL_SetUSARTFRGDivider(0xFF);
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Chip_SYSCTL_SetUSARTFRGMultiplier(frg);
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}
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/// Wait until the hardware is free then start the transmit.
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void Serial::putch(uint8_t ch) {
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LPC_UARTD_API->uart_put_char(handle_, ch);
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}
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/// Send a string.
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void Serial::putstr(const char* str) {
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for (; *str != '\0'; str++) {
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putch(*str);
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}
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}
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/// Wait until a character is received, then return it.
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uint8_t Serial::getch() {
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return LPC_UARTD_API->uart_get_char(handle_);
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}
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