82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2014 Karl Palsson <karlp@tweak.net.au>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/dma.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/usart.h>
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#include "usb_cdcacm.h"
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#include "syscfg.h"
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#include "ringb.h"
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int glue_set_line_coding_cb(uint32_t baud, uint8_t databits,
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enum usb_cdc_line_coding_bParityType cdc_parity,
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enum usb_cdc_line_coding_bCharFormat cdc_stopbits)
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{
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int uart_parity;
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int uart_stopbits;
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if (databits < 8 || databits > 9) {
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return 0;
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}
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/* Be careful here, ST counts parity as a data bit */
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switch (cdc_parity) {
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case USB_CDC_NO_PARITY:
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uart_parity = USART_PARITY_NONE;
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break;
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case USB_CDC_ODD_PARITY:
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uart_parity = USART_PARITY_ODD;
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databits++;
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break;
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case USB_CDC_EVEN_PARITY:
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uart_parity = USART_PARITY_EVEN;
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databits++;
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break;
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default:
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return 0;
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}
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switch (cdc_stopbits) {
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case USB_CDC_1_STOP_BITS:
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uart_stopbits = USART_STOPBITS_1;
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break;
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case USB_CDC_2_STOP_BITS:
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uart_stopbits = USART_STOPBITS_2;
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break;
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default:
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return 0;
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}
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/* Disable the UART while we mess with its settings */
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usart_disable(USART2);
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/* Set communication parameters */
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usart_set_baudrate(USART2, baud);
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usart_set_databits(USART2, databits);
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usart_set_parity(USART2, uart_parity);
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usart_set_stopbits(USART2, uart_stopbits);
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/* Back to work. */
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usart_enable(USART2);
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return 1;
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}
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