69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
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#include "sys.h"
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#include "usart.h"
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#if SYSTEM_SUPPORT_OS
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#include "includes.h" //ucos ʹ<><CAB9>
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#endif
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//////////////////////////////////////////////////////////////////
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>´<EFBFBD><C2B4><EFBFBD>,֧<><D6A7>printf<74><66><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫѡ<D2AA><D1A1>use MicroLIB
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#if 1
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#pragma import(__use_no_semihosting)
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// <20><><EFBFBD><D7BC><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>֧<EFBFBD>ֺ<EFBFBD><D6BA><EFBFBD>
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struct __FILE
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{
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int handle;
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};
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FILE __stdout;
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// <20><><EFBFBD><EFBFBD>_sys_exit()<29>Ա<EFBFBD><D4B1><EFBFBD>ʹ<EFBFBD>ð<EFBFBD><C3B0><EFBFBD><EFBFBD><EFBFBD>ģʽ
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_sys_exit(int x)
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{
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x = x;
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}
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// <20>ض<EFBFBD><D8B6><EFBFBD>fputc<74><63><EFBFBD><EFBFBD>
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int fputc(int ch, FILE *f)
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{
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while ((USART1->SR & 0X40) == 0); // ʹ<>ô<EFBFBD><C3B4><EFBFBD>1
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USART1->DR = (u8)ch;
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return ch;
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}
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#endif
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/**************************************************************************
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Function: Serial port 1 initialization
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Input : bound<EFBFBD><EFBFBD>Baud rate
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Output : none
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>bound<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD> ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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**************************************************************************/
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void uart_init(u32 bound)
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{
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// GPIO<49>˿<EFBFBD><CBBF><EFBFBD><EFBFBD><EFBFBD>
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE); // ʹ<><CAB9>USART1<54><31>GPIOAʱ<41><CAB1>
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// USART1_TX GPIOA.9
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; // PA.9
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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GPIO_Init(GPIOA, &GPIO_InitStructure); // <20><>ʼ<EFBFBD><CABC>GPIOA.9
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// USART1_RX GPIOA.10<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; // PA10
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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GPIO_Init(GPIOA, &GPIO_InitStructure); // <20><>ʼ<EFBFBD><CABC>GPIOA.10
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// USART <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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USART_InitStructure.USART_BaudRate = bound; // <20><><EFBFBD>ڲ<EFBFBD><DAB2><EFBFBD><EFBFBD><EFBFBD>
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USART_InitStructure.USART_WordLength = USART_WordLength_8b; // <20>ֳ<EFBFBD>Ϊ8λ<38><CEBB><EFBFBD>ݸ<EFBFBD>ʽ
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USART_InitStructure.USART_StopBits = USART_StopBits_1; // һ<><D2BB>ֹͣλ
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USART_InitStructure.USART_Parity = USART_Parity_No; // <20><><EFBFBD><EFBFBD>żУ<C5BC><D0A3>λ
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; // <20><>Ӳ<EFBFBD><D3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; // <20>շ<EFBFBD>ģʽ
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USART_Init(USART1, &USART_InitStructure); // <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1
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USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><DABD><EFBFBD><EFBFBD>ж<EFBFBD>
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USART_Cmd(USART1, ENABLE); // ʹ<>ܴ<EFBFBD><DCB4><EFBFBD>1
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}
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