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- /*!
- \file main.c
- \brief transfer data from RAM to USART
- \version 2017-02-10, V1.0.0, firmware for GD32F30x
- \version 2018-10-10, V1.1.0, firmware for GD32F30x
- \version 2018-12-25, V2.0.0, firmware for GD32F30x
- \version 2020-09-30, V2.1.0, firmware for GD32F30x
- */
- /*
- Copyright (c) 2020, GigaDevice Semiconductor Inc.
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- 1. Redistributions of source code must retain the above copyright notice, this
- list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- 3. Neither the name of the copyright holder nor the names of its contributors
- may be used to endorse or promote products derived from this software without
- specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- OF SUCH DAMAGE.
- */
- #include "gd32f30x.h"
- #include "gd32f307c_eval.h"
-
- #define USART0_DATA_ADDRESS ((uint32_t)0x40013804)
- #define ARRAYNUM(arr_nanme) (uint32_t)(sizeof(arr_nanme) / sizeof(*(arr_nanme)))
- uint8_t welcome[]="hi,this is a example: RAM_TO_USART by DMA !\n";
- FlagStatus g_transfer_complete = RESET;
- void led_config(void);
- void nvic_config(void);
- /*!
- \brief main function
- \param[in] none
- \param[out] none
- \retval none
- */
- int main(void)
- {
- dma_parameter_struct dma_init_struct;
- /* enable DMA clock */
- rcu_periph_clock_enable(RCU_DMA0);
- /* USART configure */
- gd_eval_com_init(EVAL_COM0);
- /*configure DMA interrupt*/
- nvic_config();
- /* initialize LED2 */
- led_config();
- /* turn off LED2 */
- gd_eval_led_off(LED2);
-
- /* initialize DMA channel3 */
- dma_deinit(DMA0, DMA_CH3);
- dma_init_struct.direction = DMA_MEMORY_TO_PERIPHERAL;
- dma_init_struct.memory_addr = (uint32_t)welcome;
- dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
- dma_init_struct.memory_width = DMA_MEMORY_WIDTH_8BIT;
- dma_init_struct.number = ARRAYNUM(welcome);
- dma_init_struct.periph_addr = USART0_DATA_ADDRESS;
- dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
- dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_8BIT;
- dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
- dma_init(DMA0, DMA_CH3, &dma_init_struct);
-
- /* configure DMA mode */
- dma_circulation_disable(DMA0, DMA_CH3);
- dma_memory_to_memory_disable(DMA0, DMA_CH3);
- /* USART DMA enable for transmission */
- usart_dma_transmit_config(USART0, USART_TRANSMIT_DMA_ENABLE);
-
- /* enable DMA transfer complete interrupt */
- dma_interrupt_enable(DMA0, DMA_CH3, DMA_INT_FTF);
-
- /* enable DMA channel1 */
- dma_channel_enable(DMA0, DMA_CH3);
-
- /* waiting for the transfer to complete*/
- while(RESET == g_transfer_complete);
-
- /* light LED2 */
- gd_eval_led_on(LED2);
- while (1);
- }
- /*!
- \brief LEDs configure
- \param[in] none
- \param[out] none
- \retval none
- */
- void led_config(void)
- {
- gd_eval_led_init (LED2);
- }
- /*!
- \brief configure DMA interrupt
- \param[in] none
- \param[out] none
- \retval none
- */
- void nvic_config(void)
- {
- nvic_irq_enable(DMA0_Channel3_IRQn, 0, 0);
- }
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