f28f8ba568
This was done to allow greatly granularity when deciding what functionality is built into each board's build. For example, this way pulseio can be omitted to allow for something else such as touchio.
121 lines
3.8 KiB
C
121 lines
3.8 KiB
C
/*
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* This file is part of the Micro Python 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) 2016 Damien P. George
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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 "common-hal/microcontroller/__init__.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/busio/UART.h"
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#include "ets_sys.h"
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#include "espuart.h"
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#include "py/nlr.h"
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// UartDev is defined and initialized in rom code.
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extern UartDevice UartDev;
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void common_hal_busio_uart_construct(busio_uart_obj_t *self,
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const mcu_pin_obj_t * tx, const mcu_pin_obj_t * rx, uint32_t baudrate,
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uint8_t bits, uart_parity_t parity, uint8_t stop, uint32_t timeout,
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uint8_t receiver_buffer_size) {
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if (rx != NULL || tx != &pin_GPIO2) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "Only tx supported on UART1 (GPIO2)."));
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}
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// set baudrate
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UartDev.baut_rate = baudrate;
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// set data bits
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switch (bits) {
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case 5:
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UartDev.data_bits = UART_FIVE_BITS;
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break;
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case 6:
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UartDev.data_bits = UART_SIX_BITS;
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break;
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case 7:
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UartDev.data_bits = UART_SEVEN_BITS;
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break;
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case 8:
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UartDev.data_bits = UART_EIGHT_BITS;
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break;
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default:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid data bits"));
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break;
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}
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if (parity == PARITY_NONE) {
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UartDev.parity = UART_NONE_BITS;
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UartDev.exist_parity = UART_STICK_PARITY_DIS;
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} else {
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UartDev.exist_parity = UART_STICK_PARITY_EN;
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if (parity == PARITY_ODD) {
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UartDev.parity = UART_ODD_BITS;
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} else {
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UartDev.parity = UART_EVEN_BITS;
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}
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}
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switch (stop) {
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case 1:
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UartDev.stop_bits = UART_ONE_STOP_BIT;
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break;
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case 2:
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UartDev.stop_bits = UART_TWO_STOP_BIT;
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break;
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default:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid stop bits"));
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break;
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}
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uart_setup(UART1);
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}
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void common_hal_busio_uart_deinit(busio_uart_obj_t *self) {
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PIN_FUNC_SELECT(FUNC_U1TXD_BK, 0);
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}
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size_t common_hal_busio_uart_read(busio_uart_obj_t *self, uint8_t *data, size_t len, int *errcode) {
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return 0;
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}
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// Write characters.
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size_t common_hal_busio_uart_write(busio_uart_obj_t *self, const uint8_t *data, size_t len, int *errcode) {
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// write the data
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for (size_t i = 0; i < len; ++i) {
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uart_tx_one_char(UART1, *data++);
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}
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// return number of bytes written
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return len;
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}
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uint32_t common_hal_busio_uart_rx_characters_available(busio_uart_obj_t *self) {
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return 0;
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}
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bool common_hal_busio_uart_ready_to_tx(busio_uart_obj_t *self) {
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return true;
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}
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