162 lines
6.3 KiB
C
162 lines
6.3 KiB
C
/*!
|
|
\file main.c
|
|
\brief USART DMA transmitter receiver
|
|
|
|
\version 2021-10-30, V1.0.0, firmware for GD32W51x
|
|
*/
|
|
|
|
/*
|
|
Copyright (c) 2021, 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 "gd32w51x.h"
|
|
#include <stdio.h>
|
|
|
|
#define ARRAYNUM(arr_nanme) (uint32_t)(sizeof(arr_nanme) / sizeof(*(arr_nanme)))
|
|
#define USART2_TDATA_ADDRESS (&USART_TDATA(USART2))
|
|
#define USART2_RDATA_ADDRESS (&USART_RDATA(USART2))
|
|
|
|
uint8_t rxbuffer[10];
|
|
uint8_t txbuffer[]="\n\rUSART DMA receive and transmit example, please input 10 bytes:\n\r";
|
|
|
|
void com_usart_init(void);
|
|
|
|
/*!
|
|
\brief main function
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
int main(void)
|
|
{
|
|
dma_single_data_parameter_struct dma_init_struct;
|
|
/* enable DMA clock */
|
|
rcu_periph_clock_enable(RCU_DMA0);
|
|
|
|
/* initialize the COM */
|
|
com_usart_init();
|
|
|
|
printf("\n\ra usart dma function test example!\n\r");
|
|
|
|
/* deinitialize DMA0 channel3 */
|
|
dma_deinit(DMA0, DMA_CH3);
|
|
dma_single_data_para_struct_init(&dma_init_struct);
|
|
dma_init_struct.periph_addr = (uint32_t)USART2_TDATA_ADDRESS;
|
|
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
|
|
dma_init_struct.memory0_addr = (uint32_t)txbuffer;
|
|
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
|
|
dma_init_struct.periph_memory_width = DMA_MEMORY_WIDTH_8BIT;
|
|
dma_init_struct.circular_mode = DMA_CIRCULAR_MODE_DISABLE;
|
|
dma_init_struct.direction = DMA_MEMORY_TO_PERIPH;
|
|
dma_init_struct.number = ARRAYNUM(txbuffer);
|
|
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
|
|
dma_single_data_mode_init(DMA0, DMA_CH3, &dma_init_struct);
|
|
|
|
/* DMA channel peripheral select */
|
|
dma_channel_subperipheral_select(DMA0, DMA_CH3, DMA_SUBPERI4);
|
|
|
|
/* enable DMA0 channel3 */
|
|
dma_channel_enable(DMA0, DMA_CH3);
|
|
/* USART DMA enable for transmission */
|
|
usart_dma_enable(USART2, USART_DMA_TRANSMIT);
|
|
|
|
/* wait DMA0 Channe3 transfer complete */
|
|
while(RESET == dma_flag_get(DMA0, DMA_CH3, DMA_FLAG_FTF));
|
|
|
|
while(1){
|
|
/* deinitialize DMA0 channel1 */
|
|
dma_deinit(DMA0, DMA_CH1);
|
|
dma_single_data_para_struct_init(&dma_init_struct);
|
|
dma_init_struct.periph_addr = (uint32_t)USART2_RDATA_ADDRESS;
|
|
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
|
|
dma_init_struct.memory0_addr = (uint32_t)rxbuffer;
|
|
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
|
|
dma_init_struct.periph_memory_width = DMA_MEMORY_WIDTH_8BIT;
|
|
dma_init_struct.circular_mode = DMA_CIRCULAR_MODE_DISABLE;
|
|
dma_init_struct.direction = DMA_PERIPH_TO_MEMORY;
|
|
dma_init_struct.number = 10;
|
|
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
|
|
dma_single_data_mode_init(DMA0, DMA_CH1, &dma_init_struct);
|
|
|
|
/* DMA0 channel peripheral select */
|
|
dma_channel_subperipheral_select(DMA0, DMA_CH1, DMA_SUBPERI4);
|
|
/* enable DMA0 channel1 */
|
|
dma_channel_enable(DMA0, DMA_CH1);
|
|
/* USART DMA enable for reception */
|
|
usart_dma_enable(USART2, USART_DMA_RECEIVE);
|
|
|
|
/* wait DMA0 channel2 receive complete */
|
|
while(RESET == dma_flag_get(DMA0, DMA_CH1, DMA_FLAG_FTF));
|
|
printf("\n\r%s\n\r", rxbuffer);
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\brief initialize the USART configuration of the COM
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void com_usart_init(void)
|
|
{
|
|
/* enable COM GPIO clock */
|
|
rcu_periph_clock_enable(RCU_GPIOB);
|
|
/* enable USART clock */
|
|
rcu_periph_clock_enable(RCU_USART2);
|
|
|
|
/* connect port to USART TX */
|
|
gpio_af_set(GPIOB, GPIO_AF_7, GPIO_PIN_10);
|
|
/* connect port to USART RX */
|
|
gpio_af_set(GPIOB, GPIO_AF_7, GPIO_PIN_11);
|
|
|
|
/* configure USART TX as alternate function push-pull */
|
|
gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10);
|
|
gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_10);
|
|
|
|
/* configure USART RX as alternate function push-pull */
|
|
gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_11);
|
|
gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_11);
|
|
|
|
/* USART configure */
|
|
usart_deinit(USART2);
|
|
usart_word_length_set(USART2, USART_WL_8BIT);
|
|
usart_stop_bit_set(USART2, USART_STB_1BIT);
|
|
usart_parity_config(USART2, USART_PM_NONE);
|
|
usart_baudrate_set(USART2, 115200U);
|
|
usart_receive_config(USART2, USART_RECEIVE_ENABLE);
|
|
usart_transmit_config(USART2, USART_TRANSMIT_ENABLE);
|
|
|
|
usart_enable(USART2);
|
|
}
|
|
|
|
/* retarget the C library printf function to the USART */
|
|
int fputc(int ch, FILE *f)
|
|
{
|
|
usart_data_transmit(USART2, (uint8_t) ch);
|
|
while(RESET == usart_flag_get(USART2, USART_FLAG_TBE));
|
|
return ch;
|
|
}
|