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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2014 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/dma.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/usart.h>
#include "usb_cdcacm.h"
#include "syscfg.h"
#include "ringb.h"
extern bool out_in_progress;
void usb_cdcacm_setup_pre_arch(void)
{
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_OTGFS);
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE,
GPIO9 | GPIO11 | GPIO12);
gpio_set_af(GPIOA, GPIO_AF10, GPIO9 | GPIO11 | GPIO12);
}
void usb_cdcacm_setup_post_arch(void)
{
}
// hacktastic
extern struct ringb tx_ring;
void glue_send_data_cb(uint8_t *buf, uint16_t len)
{
if (len == 0) {
return;
}
gpio_set(LED_TX_PORT, LED_TX_PIN);
gpio_set(RS485DE_PORT, RS485DE_PIN);
for (int x = 0; x < len; x++) {
if (!ringb_put(&tx_ring, buf[x])) {
// failed to process usb traffic properly.
// should _never_ happen, means we failed to nak in time.
// this is _never_recoverable beyond watchdog reset.
while(1);
}
usart_enable_tx_interrupt(USART2);
}
}
void glue_set_line_state_cb(uint8_t dtr, uint8_t rts)
{
(void) dtr;
(void) rts;
// LM4f has an implementation of this if you're keen
}
int glue_set_line_coding_cb(uint32_t baud, uint8_t databits,
enum usb_cdc_line_coding_bParityType cdc_parity,
enum usb_cdc_line_coding_bCharFormat cdc_stopbits)
{
int uart_parity;
int uart_stopbits;
if (databits < 8 || databits > 9) {
return 0;
}
/* Be careful here, ST counts parity as a data bit */
switch (cdc_parity) {
case USB_CDC_NO_PARITY:
uart_parity = USART_PARITY_NONE;
break;
case USB_CDC_ODD_PARITY:
uart_parity = USART_PARITY_ODD;
databits++;
break;
case USB_CDC_EVEN_PARITY:
uart_parity = USART_PARITY_EVEN;
databits++;
break;
default:
return 0;
}
switch (cdc_stopbits) {
case USB_CDC_1_STOP_BITS:
uart_stopbits = USART_STOPBITS_1;
break;
case USB_CDC_2_STOP_BITS:
uart_stopbits = USART_STOPBITS_2;
break;
default:
return 0;
}
/* Disable the UART while we mess with its settings */
usart_disable(USART2);
/* Set communication parameters */
usart_set_baudrate(USART2, baud);
usart_set_databits(USART2, databits);
usart_set_parity(USART2, uart_parity);
usart_set_stopbits(USART2, uart_stopbits);
/* Back to work. */
usart_enable(USART2);
return 1;
}
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