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qiyongshuang
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/********************************** (C) COPYRIGHT *******************************
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* File Name : uart.c
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* Author : WCH
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* Version : V1.0
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* Date : 2022/06/30
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* Description :
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "config.h"
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#include "uart.h"
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#include "atomic.h"
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#include "test_dtm.h"
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static tmosTaskID uart_taskid;
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static uint8_t rx_buf[100];
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static struct simple_buf *uart_buf = NULL;
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static struct simple_buf uart_buffer;
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enum uart_status {
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UART_STATUS_IDLE,
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UART_STATUS_RCVING,
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UART_STATUS_RCV_END,
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UART_STATUS_SENDING,
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UART_STATUS_NUM,
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};
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atomic_t uart_flag;
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void uart_buffer_create(struct simple_buf **buf)
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{
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*buf = simple_buf_create(&uart_buffer, rx_buf, sizeof(rx_buf));
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}
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int uart_start_receiving(void)
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{
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PRINT("uart2 reeciving\n");
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atomic_set(&uart_flag, UART_STATUS_RCVING);
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uart_buffer_create(&uart_buf);
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USART_Cmd(USART2, ENABLE);
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return 0;
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}
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void uart2_send_data(uint8_t *data, uint16_t len)
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{
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for(int i = 0; i < len; i++) {
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USART_SendData(USART2, data[i]);
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while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET) {
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/* waiting for sending finish */
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;
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}
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}
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}
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int uart_send(struct simple_buf *buf)
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{
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atomic_set(&uart_flag, UART_STATUS_SENDING);
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uint8_t *send_data;
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uint16_t send_len;
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send_len = buf->len;
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send_data = simple_buf_pull(buf, buf->len);
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uart2_send_data(send_data, send_len);
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atomic_set(&uart_flag, UART_STATUS_IDLE);
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PRINT("uart2 send %d bytes [", send_len);
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for(int i = 0; i < send_len; i++){
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if(i) PRINT(" ");
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PRINT("%#x", send_data[i]);
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}
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PRINT("]\n");
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return 0;
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}
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/*********************************************************************
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* @fn uart_processevent
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*
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* @brief process handle
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*
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* @param task_id - The TMOS assigned task ID.
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* @param events - events to process. This is a bit map and can
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* contain more than one event.
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*
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* @return events not processed
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*/
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tmosEvents uart_processevent(tmosTaskID task_id, tmosEvents events)
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{
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if(events & SYS_EVENT_MSG)
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{
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uint8_t *msgPtr;
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msgPtr = tmos_msg_receive(task_id);
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if(msgPtr)
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{
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/* De-allocate */
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tmos_msg_deallocate(msgPtr);
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}
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return (events ^ SYS_EVENT_MSG);
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}
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if(events & UART_RECEIVE_POLL_EVT) {
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if(atomic_get(&uart_flag) == UART_STATUS_RCV_END) {
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PRINT("uart2 recevied %d bytes [", uart_buf->len);
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for(int i = 0; i < uart_buf->len; i++) {
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if(i) PRINT(" ");
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PRINT("%#x", uart_buf->data[i]);
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}
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PRINT("]\n");
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struct uart_process_msg *uart_msg;
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uart_msg = (struct uart_process_msg *) \
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tmos_msg_allocate(sizeof(struct uart_process_msg));
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if(uart_msg) {
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uart_msg->hdr.event = UART_PROCESS_EVT;
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uart_msg->hdr.status = true;
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uart_msg->data = (uint8_t *)uart_buf;
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tmos_msg_send(test_taskid, (uint8_t *)uart_msg );
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}
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}
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return (events ^ UART_RECEIVE_POLL_EVT);
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}
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return 0;
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}
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void uart_task_init(void)
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{
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uart_taskid = TMOS_ProcessEventRegister(uart_processevent);
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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/* USART2 TX-->A.2 RX-->A.3 */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
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USART_Init(USART2, &USART_InitStructure);
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USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
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USART_ITConfig(USART2, USART_IT_IDLE, ENABLE);
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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tmos_start_reload_task(uart_taskid, UART_RECEIVE_POLL_EVT,
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MS1_TO_SYSTEM_TIME(100));
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atomic_set(&uart_flag, UART_STATUS_IDLE);
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uart_start_receiving();
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}
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/*********************************************************************
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* @fn USART2_IRQHandler
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*
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* @brief This function handles USART2 global interrupt request.
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*
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* @return none
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*/
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__attribute__((interrupt("WCH-Interrupt-fast")))
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void USART2_IRQHandler(void)
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{
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if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
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{
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simple_buf_add_u8(uart_buf, USART_ReceiveData(USART2));
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}
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if(USART_GetITStatus(USART2, USART_IT_IDLE) != RESET)
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{
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atomic_set(&uart_flag, UART_STATUS_RCV_END);
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/* clear IDLE flag */
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(void)USART_ReceiveData(USART2);
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}
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}
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