291 lines
8.5 KiB
C
291 lines
8.5 KiB
C
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/*
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* FreeModbus Libary: RT-Thread Port
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* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (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 GNU
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* 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
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* File: $Id: portserial_m.c,v 1.60 2013/08/13 15:07:05 Armink add Master
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* Functions $
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*/
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#include "port.h"
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mbport.h"
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#include "wk_bsp.h"
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static usart_type* port_uart_list[] = {UART7};
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static usart_type* port_uart;
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#if MB_MASTER_RTU_ENABLED > 0 || MB_MASTER_ASCII_ENABLED > 0
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/* ----------------------- Static variables ---------------------------------*/
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static volatile uint8_t rx_buff[FIFO_SIZE_MAX];
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static Serial_fifo Master_serial_rx_fifo;
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/* software simulation serial transmit IRQ handler thread stack */
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/* software simulation serial transmit IRQ handler thread */
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static TaskHandle_t thread_serial_soft_trans_irq = NULL; /* 创建任务句柄 */
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/* serial event */
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static EventGroupHandle_t event_serial = NULL;
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/* modbus master serial device */
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//static UART_HandleTypeDef *serial;
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/* ----------------------- Defines ------------------------------------------*/
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/* serial transmit event */
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#define EVENT_SERIAL_TRANS_START (1 << 0)
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/* ----------------------- static functions ---------------------------------*/
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static void prvvUARTTxReadyISR(void);
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static void prvvUARTRxISR(void);
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static void serial_soft_trans_irq(void *parameter);
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//static void Master_TxCpltCallback(struct __UART_HandleTypeDef *huart);
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//static void Master_RxCpltCallback(struct __UART_HandleTypeDef *huart);
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static int stm32_getc(void);
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static int stm32_putc(CHAR c);
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/* ----------------------- Start implementation -----------------------------*/
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BOOL xMBMasterPortSerialInit(UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits,
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eMBParity eParity)
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{
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/**
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* set 485 mode receive and transmit control IO
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* @note MODBUS_MASTER_RT_CONTROL_PIN_INDEX need be defined by user
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*/
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BOOL bStatus = FALSE;
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usart_parity_selection_type usart_parity;
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usart_stop_bit_num_type usart_stop;
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usart_data_bit_num_type usart_data;
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gpio_init_type gpio_init_struct;
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bStatus = TRUE;
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if(ucPORT < (sizeof(port_uart_list) / sizeof(usart_type*)))
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{
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port_uart = port_uart_list[ucPORT];
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}
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else
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{
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bStatus = FALSE;
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}
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switch ( eParity )
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{
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case MB_PAR_NONE:
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usart_parity = USART_PARITY_NONE;
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usart_stop = USART_STOP_1_BIT;
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break;
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case MB_PAR_ODD:
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usart_parity = USART_PARITY_ODD;
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usart_stop = USART_STOP_1_BIT;
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break;
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case MB_PAR_EVEN:
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usart_parity = USART_PARITY_EVEN;
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usart_stop = USART_STOP_1_BIT;
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break;
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default:
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bStatus = FALSE;
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break;
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}
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switch ( ucDataBits )
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{
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case 8:
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if(usart_stop == USART_STOP_1_BIT)
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{
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usart_data = USART_DATA_8BITS;
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}
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else
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{
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bStatus = FALSE;
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}
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break;
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default:
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bStatus = FALSE;
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break;
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}
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//串口初始化
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if(TRUE == bStatus)
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{
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wk_uart7_init(ulBaudRate, usart_data, usart_stop, usart_parity);
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switch((u32)port_uart){
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case (u32)UART7:
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usart_interrupt_enable(port_uart, USART_RDBF_INT, FALSE);
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// NVIC_SetPriority(UART7_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 4, 0));//emac = 5
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NVIC_ClearPendingIRQ(UART7_IRQn);
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nvic_irq_enable(UART7_IRQn, 6, 0); //emac = 5
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break;
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default:
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bStatus = FALSE;
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break;
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}
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}
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/* software initialize */
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Master_serial_rx_fifo.buffer = rx_buff;
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Master_serial_rx_fifo.get_index = 0;
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Master_serial_rx_fifo.put_index = 0;
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/* software initialize */
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/* 创建主站发送任<E98081>?? */
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event_serial = xEventGroupCreate();
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if (NULL != event_serial) {
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MODBUS_DEBUG("Master create event_serial success! event_serial=%d\r\n",
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event_serial);
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} else {
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MODBUS_DEBUG("Master create event_serial Failed!\r\n");
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}
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BaseType_t xReturn = pdPASS;
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xReturn =
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xTaskCreate((TaskFunction_t)serial_soft_trans_irq, /* 任务入口函数 */
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(const char *)"mb_tx_irq", /* 任务名字 */
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(uint16_t)MB_TX_STK_SIZE, /* 任务栈大<E6A088>?? */
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(void *)NULL, /* 任务入口函数参数 */
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(UBaseType_t)MB_TX_PRIO, /* 任务的优先级 */
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NULL); /*任务控制块指<E59D97>?? */
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if (xReturn == pdPASS) {
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MODBUS_DEBUG("xTaskCreate Master trans success\r\n");
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} else {
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MODBUS_DEBUG("xTaskCreate Master trans faild!\r\n");
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return FALSE;
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}
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return TRUE;
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}
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void vMBMasterPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable) {
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/*这一步不能省略，需要提前清理掉标志位，否则接收会有问题*/
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usart_flag_clear(port_uart, USART_RDBF_FLAG);
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if(xRxEnable == TRUE)
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{
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at32_gpio_low(RS485_DE2);
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usart_interrupt_enable(port_uart, USART_RDBF_INT, TRUE);
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}
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else
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{
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usart_interrupt_enable(port_uart, USART_RDBF_INT, FALSE);
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}
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if (xTxEnable == pdTRUE) {
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at32_gpio_high(RS485_DE2);
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/* start serial transmit */
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xEventGroupSetBits(event_serial, EVENT_SERIAL_TRANS_START);
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} else {
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xEventGroupClearBits(event_serial, EVENT_SERIAL_TRANS_START);
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}
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}
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void vMBMasterPortClose(void) {
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// __HAL_UART_DISABLE(serial);
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}
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BOOL xMBMasterPortSerialPutByte(CHAR ucByte) {
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// RTT_LOG("%x ",ucByte);
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stm32_putc(ucByte);
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return TRUE;
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}
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BOOL xMBMasterPortSerialGetByte(CHAR *pucByte) {
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Get_from_fifo(&Master_serial_rx_fifo, (uint8_t *)pucByte, 1);
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return TRUE;
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}
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/*
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* Create an interrupt handler for the transmit buffer empty interrupt
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* (or an equivalent) for your target processor. This function should then
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* call pxMBFrameCBTransmitterEmpty( ) which tells the protocol stack that
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* a new character can be sent. The protocol stack will then call
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* xMBPortSerialPutByte( ) to send the character.
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*/
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void prvvUARTTxReadyISR(void) { pxMBMasterFrameCBTransmitterEmpty(); }
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/*
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* Create an interrupt handler for the receive interrupt for your target
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* processor. This function should then call pxMBFrameCBByteReceived( ). The
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* protocol stack will then call xMBPortSerialGetByte( ) to retrieve the
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* character.
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*/
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void prvvUARTRxISR(void) { pxMBMasterFrameCBByteReceived(); }
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/**
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* Software simulation serial transmit IRQ handler.
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*
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* @param parameter parameter
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*/
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static void serial_soft_trans_irq(void *parameter) {
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while (1) {
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/* waiting for serial transmit start */
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xEventGroupWaitBits(event_serial, /* 事件对象句柄 */
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EVENT_SERIAL_TRANS_START, /* 接收任务感兴趣的事件 */
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pdFALSE, /* 退出时清除事件<E4BA8B>?? */
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pdFALSE, /* 满足感兴趣的所有事<E69C89>?? */
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portMAX_DELAY); /* 指定超时事件,无限等待 */
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/* execute modbus callback */
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prvvUARTTxReadyISR();
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}
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}
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/**
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* @brief Rx Transfer completed callbacks.
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* @param huart Pointer to a UART_HandleTypeDef structure that contains
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* the configuration information for the specified UART module.
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* @retval None
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*/
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/*UART发送一个数据*/
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static int stm32_putc(CHAR c) {
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while(usart_flag_get(port_uart, USART_TDBE_FLAG) == RESET);
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usart_data_transmit(port_uart, (uint16_t)c);
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while(usart_flag_get(port_uart, USART_TDC_FLAG) == RESET);
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return TRUE;
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}
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void Master_vUSARTHandler( void )
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{
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int ch = -1;
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if(port_uart->ctrl1_bit.rdbfien == SET)
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{
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if(usart_flag_get(port_uart, USART_RDBF_FLAG) == SET)
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{
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ch = usart_data_receive(port_uart);
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Put_in_fifo(&Master_serial_rx_fifo, (uint8_t *)&ch, 1);
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prvvUARTRxISR();
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}
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}
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if(port_uart->ctrl1_bit.tdbeien == SET)
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{
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if(usart_flag_get(port_uart, USART_TDBE_FLAG) == SET)
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{
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prvvUARTTxReadyISR();
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}
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}
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}
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void UART7_IRQHandler(void)
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{
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Master_vUSARTHandler( );
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}
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#endif
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