91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017, 2018 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland for Adafruit Industries
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* Copyright (c) 2019 Artur Pacholec
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/mphal.h"
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#include <string.h>
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#include "supervisor/serial.h"
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#include "fsl_clock.h"
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#include "fsl_lpuart.h"
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// TODO: Switch this to using DEBUG_UART.
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// static LPUART_Type *uart_instance = LPUART1; // evk
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static LPUART_Type *uart_instance = LPUART4; // feather 1011
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// static LPUART_Type *uart_instance = LPUART2; // feather 1062
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static uint32_t UartSrcFreq(void) {
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uint32_t freq;
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/* To make it simple, we assume default PLL and divider settings, and the only variable
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from application is use PLL3 source or OSC source */
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/* PLL3 div6 80M */
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if (CLOCK_GetMux(kCLOCK_UartMux) == 0) {
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freq = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
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} else {
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freq = CLOCK_GetOscFreq() / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
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}
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return freq;
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}
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void port_serial_init(void) {
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lpuart_config_t config;
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LPUART_GetDefaultConfig(&config);
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config.baudRate_Bps = 115200;
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config.enableTx = true;
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config.enableRx = true;
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LPUART_Init(uart_instance, &config, UartSrcFreq());
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}
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bool port_serial_connected(void) {
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return true;
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}
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char port_serial_read(void) {
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uint8_t data;
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LPUART_ReadBlocking(uart_instance, &data, sizeof(data));
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return data;
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}
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bool port_serial_bytes_available(void) {
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return LPUART_GetStatusFlags(uart_instance) & kLPUART_RxDataRegFullFlag;
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}
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void port_serial_write_substring(const char *text, uint32_t len) {
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if (len == 0) {
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return;
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}
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LPUART_WriteBlocking(uart_instance, (uint8_t *)text, len);
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}
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