mirror of
https://github.com/Fishwaldo/bl_mcu_sdk.git
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79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/**
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* @file main.c
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* @brief
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*
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* Copyright (c) 2021 Bouffalolab team
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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*/
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#include "bflb_platform.h"
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#include "hal_dma.h"
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#include "hal_uart.h"
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static volatile uint8_t dma_busy_flag = 0;
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void dma_transfer_done(struct device *dev, void *args, uint32_t size, uint32_t state)
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{
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dma_busy_flag = 0;
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BL_CASE_SUCCESS;
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}
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int main(void)
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{
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bflb_platform_init(0);
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uart_register(UART1_INDEX, "uart1");
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struct device *uart = device_find("uart1");
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if (uart) {
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//UART_DEV(uart)->fifo_threshold = 0;
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device_open(uart, DEVICE_OFLAG_DMA_TX | DEVICE_OFLAG_DMA_RX);
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}
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dma_register(DMA0_CH0_INDEX, "dma_ch0");
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struct device *dma_ch0 = device_find("dma_ch0");
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if (dma_ch0) {
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DMA_DEV(dma_ch0)->direction = DMA_PERIPH_TO_PERIPH;
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DMA_DEV(dma_ch0)->transfer_mode = DMA_LLI_ONCE_MODE;
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DMA_DEV(dma_ch0)->src_req = DMA_REQUEST_UART1_RX;
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DMA_DEV(dma_ch0)->dst_req = DMA_REQUEST_UART1_TX;
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DMA_DEV(dma_ch0)->src_addr_inc = DMA_ADDR_INCREMENT_DISABLE;
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DMA_DEV(dma_ch0)->dst_addr_inc = DMA_ADDR_INCREMENT_DISABLE;
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DMA_DEV(dma_ch0)->src_burst_size = DMA_BURST_INCR1;
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DMA_DEV(dma_ch0)->dst_burst_size = DMA_BURST_INCR1;
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DMA_DEV(dma_ch0)->src_width = DMA_TRANSFER_WIDTH_8BIT;
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DMA_DEV(dma_ch0)->dst_width = DMA_TRANSFER_WIDTH_8BIT;
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device_open(dma_ch0, 0);
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device_set_callback(dma_ch0, dma_transfer_done);
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device_control(dma_ch0, DEVICE_CTRL_SET_INT, NULL);
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}
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while (1) {
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if (dma_busy_flag == 0) {
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dma_busy_flag = 1;
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/* default fifo_threshold is 63 , so if size < 64 ,data will be stored in fifo not tdr.
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So you can modify fifo_threshold=0 at first to get one data trigger
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*/
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dma_reload(dma_ch0, (uint32_t)DMA_ADDR_UART1_RDR, (uint32_t)DMA_ADDR_UART1_TDR, 64);
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dma_channel_start(dma_ch0);
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}
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bflb_platform_delay_ms(100);
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}
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}
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