mirror of
https://github.com/hathach/tinyusb.git
synced 2025-01-17 05:32:55 +08:00
106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2023 Denis Krasutski
|
|
*
|
|
* 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.
|
|
*
|
|
* This file is part of the TinyUSB stack.
|
|
*/
|
|
#include <ch32f20x.h>
|
|
|
|
#include "board.h"
|
|
#include "debug_uart.h"
|
|
|
|
#define UART_RINGBUFFER_SIZE_TX 64
|
|
#define UART_RINGBUFFER_MASK_TX (UART_RINGBUFFER_SIZE_TX-1)
|
|
|
|
static char tx_buf[UART_RINGBUFFER_SIZE_TX];
|
|
static unsigned int tx_produce = 0;
|
|
static volatile unsigned int tx_consume = 0;
|
|
|
|
void UART_DEV_IRQHandler(void)
|
|
{
|
|
if(USART_GetITStatus(UART_DEV, USART_IT_TC) != RESET) {
|
|
USART_ClearITPendingBit(UART_DEV, USART_IT_TC);
|
|
|
|
if(tx_consume != tx_produce) {
|
|
USART_SendData(UART_DEV, tx_buf[tx_consume]);
|
|
tx_consume = (tx_consume + 1) & UART_RINGBUFFER_MASK_TX;
|
|
}
|
|
}
|
|
}
|
|
|
|
void uart_write(char c)
|
|
{
|
|
unsigned int tx_produce_next = (tx_produce + 1) & UART_RINGBUFFER_MASK_TX;
|
|
|
|
NVIC_DisableIRQ(UART_DEV_IRQn);
|
|
if((tx_consume != tx_produce) || (USART_GetFlagStatus(UART_DEV, USART_FLAG_TXE) == RESET)) {
|
|
tx_buf[tx_produce] = c;
|
|
tx_produce = tx_produce_next;
|
|
} else {
|
|
USART_SendData(UART_DEV, c);
|
|
}
|
|
NVIC_EnableIRQ(UART_DEV_IRQn);
|
|
}
|
|
|
|
void uart_sync(void)
|
|
{
|
|
while(tx_consume != tx_produce) {
|
|
//Waiting for transfer complete
|
|
}
|
|
}
|
|
|
|
void usart_printf_init(uint32_t baudrate)
|
|
{
|
|
tx_produce = 0;
|
|
tx_consume = 0;
|
|
|
|
UART_DEV_CLK_EN();
|
|
|
|
GPIO_InitTypeDef gpio_config = {
|
|
.GPIO_Pin = UART_DEV_TX_PIN,
|
|
.GPIO_Speed = GPIO_Speed_50MHz,
|
|
.GPIO_Mode = GPIO_Mode_AF_PP,
|
|
};
|
|
GPIO_Init(UART_DEV_GPIO_PORT, &gpio_config);
|
|
|
|
USART_InitTypeDef uart_config = {
|
|
.USART_BaudRate = baudrate,
|
|
.USART_WordLength = USART_WordLength_8b,
|
|
.USART_StopBits = USART_StopBits_1,
|
|
.USART_Parity = USART_Parity_No,
|
|
.USART_HardwareFlowControl = USART_HardwareFlowControl_None,
|
|
.USART_Mode = USART_Mode_Tx,
|
|
};
|
|
|
|
USART_Init(UART_DEV, &uart_config);
|
|
USART_ITConfig(UART_DEV, USART_IT_TC, ENABLE);
|
|
USART_Cmd(UART_DEV, ENABLE);
|
|
|
|
NVIC_InitTypeDef nvic_config = {
|
|
.NVIC_IRQChannel = UART_DEV_IRQn,
|
|
.NVIC_IRQChannelPreemptionPriority = 1,
|
|
.NVIC_IRQChannelSubPriority = 3,
|
|
.NVIC_IRQChannelCmd = ENABLE,
|
|
};
|
|
NVIC_Init(&nvic_config);
|
|
}
|