circuitpython/ports/mimxrt10xx/supervisor/serial.c

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