92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
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*********************************************************************************************************
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* IAR Development Kits
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* on the
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*
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* M451
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*
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* Filename : uart_console.c
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* Version : V1.00
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* Programmer(s) : Qian Xianghong
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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* INCLUDE FILES
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*********************************************************************************************************
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*/
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#include "includes.h"
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//#include "stm32l4xx_hal_uart.h"
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#pragma import(__use_no_semihosting)
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/* ?????????? */
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struct __FILE {
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int handle;
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};
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/* FILE ?stdio.h?? */
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FILE __stdout;
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/* ??_sys_exit()?????????? */
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void _sys_exit(int x)
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{
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x = x;
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}
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int fputc(int ch, FILE *stream)
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{
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// while((USART1->ISR & UART_FLAG_TC) == 0);
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// USART1->TDR = (uint8_t) ch;
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// return ch;
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// ?????????
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while (!LL_USART_IsActiveFlag_TXE(USART2));
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// ????
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LL_USART_TransmitData8(USART2, (uint8_t)ch);
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return ch;
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}
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void Console_Init()
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{
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOD);
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/**USART2 GPIO Configuration
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PD5 ------> USART2_TX
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PD6 ------> USART2_RX
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*/
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GPIO_InitStruct.Pin = LL_GPIO_PIN_5|LL_GPIO_PIN_6;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_MEDIUM;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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GPIO_InitStruct.Alternate = LL_GPIO_AF_7;
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LL_GPIO_Init(GPIOD, &GPIO_InitStruct);
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}
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void Console_Open()
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{
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LL_USART_InitTypeDef USART_InitStruct = {0};
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/* Peripheral clock enable */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_USART2);
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/* USART2 interrupt Init */
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NVIC_SetPriority(USART2_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),5, 0));
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NVIC_EnableIRQ(USART2_IRQn);
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USART_InitStruct.BaudRate = 115200;
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USART_InitStruct.DataWidth = LL_USART_DATAWIDTH_8B;
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USART_InitStruct.StopBits = LL_USART_STOPBITS_1;
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USART_InitStruct.Parity = LL_USART_PARITY_NONE;
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USART_InitStruct.TransferDirection = LL_USART_DIRECTION_TX_RX;
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USART_InitStruct.HardwareFlowControl = LL_USART_HWCONTROL_NONE;
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USART_InitStruct.OverSampling = LL_USART_OVERSAMPLING_16;
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LL_USART_Init(USART2, &USART_InitStruct);
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LL_USART_ConfigAsyncMode(USART2);
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SET_BIT(USART2->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
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LL_USART_Enable(USART2);
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}
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