117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
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#include "usart.h"
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#ifdef __GNUC__
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/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
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set to 'Yes') calls __io_putchar() */
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#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
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#else
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#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
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#endif /* __GNUC__ */
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/*******************************************************************************
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* Function Name : USART_Configuration
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* Description : Configure Open207V_USART
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* Input : None
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* Output : None
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* Return : None
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* Attention : None
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*******************************************************************************/
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void USART_Configuration(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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RCC_AHB1PeriphClockCmd(Open207V_USART_TX_GPIO_CLK | Open207V_USART_RX_GPIO_CLK,ENABLE);
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RCC_APB2PeriphClockCmd(Open207V_USART_CLK,ENABLE);
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GPIO_PinAFConfig(Open207V_USART_TX_GPIO_PORT, Open207V_USART_TX_SOURCE, Open207V_USART_TX_AF);
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GPIO_PinAFConfig(Open207V_USART_RX_GPIO_PORT, Open207V_USART_RX_SOURCE, Open207V_USART_RX_AF);
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/*
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* Open207V_USART_TX -> PA9 , Open207V_USART_RX -PA10
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*/
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GPIO_InitStructure.GPIO_Pin = Open207V_USART_TX_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = Open207V_USART_RX_PIN;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/*
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USARTx configured as follow:
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- BaudRate = 115200 baud
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- Word Length = 8 Bits
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- One Stop Bit
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- No parity
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- Hardware flow control disabled (RTS and CTS signals)
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- Receive and transmit
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*/
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USART_InitStructure.USART_BaudRate = 115200;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(Open207V_USART, &USART_InitStructure);
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/* Enable the Open207V_USART Transmit interrupt: this interrupt is generated when the
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Open207V_USART transmit data register is empty */
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USART_ITConfig(Open207V_USART,USART_IT_RXNE,ENABLE);
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USART_Cmd(Open207V_USART, ENABLE);
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}
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void USART_NVIC_Config(void)
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{
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NVIC_InitTypeDef NVIC_InitStructure;
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/* Enable the USARTx Interrupt */
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NVIC_InitStructure.NVIC_IRQChannel = Open207V_USART_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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}
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/* Use no semihosting */
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#if 1
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#pragma import(__use_no_semihosting)
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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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_sys_exit(int x)
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{
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x = x;
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}
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#endif
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/**
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* @brief Retargets the C library printf function to the USART.
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* @param None
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* @retval None
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*/
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PUTCHAR_PROTOTYPE
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{
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/* Place your implementation of fputc here */
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/* e.g. write a character to the USART */
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USART_SendData(Open207V_USART, (uint8_t) ch);
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/* Loop until the end of transmission */
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while (USART_GetFlagStatus(Open207V_USART, USART_FLAG_TC) == RESET)
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{}
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return ch;
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}
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