[GigaDevice GD32F310 Review] + UART Application

jinglixixi

[GigaDevice GD32F310 Review] + UART Application [Copy link]

GD32F310 is equipped with standard and advanced communication interfaces including 2 USARTs, which can be used for debugging output and communication between serial port devices.

1. printf output

To realize printf output, it is necessary to configure the pins and serial communication. The main functions of this work are usart0_gpio_config(),

usart0_config() and fputc() are used to complete the operation. The content is as follows:

void usart0_gpio_config(void)
{
 rcu_periph_clock_enable(RCU_GPIOA);
 /* connect port to USARTx_Tx */
 gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_9);
 /* connect port to USARTx_Rx */
 gpio_af_set(GPIOA, GPIO_AF_1, GPIO_PIN_10);
 gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9);
 gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_9);
 gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10);
 gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_10MHZ, GPIO_PIN_10);
}

void usart0_config(void)
{
 rcu_periph_clock_enable(RCU_USART0);
 usart_deinit(USART0);
 usart_word_length_set(USART0, USART_WL_8BIT);
 usart_stop_bit_set(USART0, USART_STB_1BIT);
 usart_parity_config(USART0, USART_PM_NONE);
 usart_baudrate_set(USART0, 115200U);
 usart_receive_config(USART0, USART_RECEIVE_ENABLE);
 usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
 usart_enable(USART0);
}

int fputc(int ch, FILE *f)
{
 usart_data_transmit(USART0, (uint8_t) ch);
 while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));
 return ch;
}

With the support of the above functions, the printf output function can be realized, and the test effect is shown in Figure 1.

Figure 1 Output test

The main program to implement the output test is:

int main(void)
{
 systick_config();
 usart0_gpio_config();
 usart0_config();
 printf("usart transmit test example!");
while(1);
}

2. Send characters

In serial communication, sending various instructions and parameters is very common and very useful. The problem can be solved by using the function usart_data_transmit in the function library. If sending instructions, the instructions can also be stored in an array to simplify processing.

The test procedure for sending characters is as follows:

int main(void)
{
 systick_config();
 usart0_gpio_config();
 usart0_config();
 printf("usart transmit test example!");
while(1){
 delay_1ms(1000);
 usart_data_transmit(USART0, 'A');
 }
}

After downloading and testing, the test result is shown in Figure 2, indicating that the function is normal.

Figure 2 Sending characters

3. Send and receive processing

In serial communication, the sending and receiving response between devices is very important, which can ensure the reliable operation of the devices.

Use the receiving function usart_data_receive() to complete the test of the receiving and sending process. The test procedure is as follows:

int main(void)
{
 uint16_t m,p;
 systick_config();
 usart0_gpio_config();
 usart0_config();
while(1){
    m=usart_data_receive(USART0);
if(m!=p)
{
usart_data_transmit(USART0, m);
p=m;
}
 }
}

The program is downloaded, and the test result is shown in FIG3 , that is, each time an inconsistent character is sent, the corresponding content is echoed.

Figure 3 Character reception and transmission

Jacktang

UART application is a basic application and the evaluation is normal

lugl4313820

Great tutorial, thanks for sharing.

芯片老兵

Thank you for sharing, I have learned a lot and hope to have the opportunity to communicate more about this.

jinglixixi

Chip Veteran Published on 2022-5-31 13:52 Thank you for sharing, I have learned a lot, and I hope to have the opportunity to communicate more about these.

jinglixixi

lugl4313820 posted on 2022-5-30 08:19 Very good tutorial, thank you for sharing.

Thanks for your support!!!

芯片老兵

Thanks for sharing, very professional.

芯片老兵

Thank you for sharing, very professional, I hope to have the opportunity to learn.

ZanbaTea

Thank you for sharing! Let's learn and progress together. Come on! Come on!

jinglixixi

ZanbaTea posted on 2022-6-3 22:35 Thank you for sharing! Let's learn and progress together, come on! Come on!