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add usart0, printf support for GD32VF103C_START board

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This commit is contained in:
acevest
2019-10-01 17:18:54 +08:00
parent 25f2aeef9e
commit bd407ece98
8 changed files with 139 additions and 59 deletions
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30
board/GD32VF103C_START/BSP/Src/usart.c Normal file
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@@ -0,0 +1,30 @@
#include "gd32vf103.h"
#include "usart.h"
void usart0_init(int baud)
{
uint32_t com = USART0;
/* enable GPIO clock */
rcu_periph_clock_enable(RCU_GPIOA);
/* enable USART clock */
rcu_periph_clock_enable(RCU_USART0);
/* connect port to USARTx_Tx */
gpio_init(USART0_GPIO_PORT, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, USART0_GPIO_TX_PIN);
/* connect port to USARTx_Rx */
gpio_init(USART0_GPIO_PORT, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, USART0_GPIO_RX_PIN);
/* USART configure */
usart_deinit(com);
usart_baudrate_set(com, baud);
usart_word_length_set(com, USART_WL_8BIT);
usart_stop_bit_set(com, USART_STB_1BIT);
usart_parity_config(com, USART_PM_NONE);
usart_hardware_flow_rts_config(com, USART_RTS_DISABLE);
usart_hardware_flow_cts_config(com, USART_CTS_DISABLE);
usart_receive_config(com, USART_RECEIVE_ENABLE);
usart_transmit_config(com, USART_TRANSMIT_ENABLE);
usart_enable(com);
}