/****************************************************************************
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* Copyright: (C)2018 Î人ÁèÔÆÎïÍøÖÇ¿ÆʵÑéÊÒ www.iot-yun.com
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* Author: GuoWenxue<guowenxue@gmail.com> QQ: 281143292
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* Description: STM32L151C8T6 CubeMX ¿ª·¢°å printfºÍ´®¿Ú³õʼ»¯º¯Êý
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* δʹÓÃÖжÏģʽ´¦Àí·¢ËͺͽÓÊÕ
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*
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* ChangeLog:
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* °æ±¾ºÅ ÈÕÆÚ ×÷Õß ËµÃ÷
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* V1.0.0 2018.11.05 GuoWenxue ·¢²¼¸Ã°æ±¾
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****************************************************************************/
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#include <stdio.h>
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#include "stm32_usart.h"
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static USART_TypeDef* debug_usart=USART1; /* ĬÈÏʹÓô®¿Ú1×÷Ϊµ÷ÊÔ´®¿Ú */
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/* ¿ª·¢°åÉϵĸ÷¸ö´®¿ÚËùʹÓõĴ®¿Ú ¹Ü½Å¡¢Ê±ÖÓ¶¨Òå */
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stm32_usart_pins_t usart_pins[USART_MAX] =
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{
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/* USARTx GPIOx Tx_Pin Rx_Pin Tx_Pin_source Rx_Pin_Source GPIO_AF_USARTx USART_Clock TxRx_GPIO_Clock */
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{USART1, GPIOA, GPIO_Pin_9, GPIO_Pin_10, GPIO_PinSource9, GPIO_PinSource10, GPIO_AF_USART1, RCC_APB2Periph_USART1, RCC_AHBPeriph_GPIOA},
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{USART2, GPIOA, GPIO_Pin_2, GPIO_Pin_3, GPIO_PinSource2, GPIO_PinSource3, GPIO_AF_USART2, RCC_APB1Periph_USART2, RCC_AHBPeriph_GPIOA},
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{USART3, GPIOB, GPIO_Pin_10, GPIO_Pin_11, GPIO_PinSource10, GPIO_PinSource11, GPIO_AF_USART3, RCC_APB1Periph_USART3, RCC_AHBPeriph_GPIOB},
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};
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/* º¯Êý˵Ã÷: ÅäÖô®¿ÚGPIO¿ÚºÍʱÖÓ£»
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* ²ÎÊý˵Ã÷: whichÖ¸¶¨ÒªÅäÖõĴ®¿Ú,ÆäÖµÓ¦¸ÃΪ USART_PORT1¡¢USART_PORT2¡¢USART_PORT3£¬¶¨ÒåÔÚstm32_usart.hÖУ»
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* ·µ»ØÖµ: ÎÞ
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*/
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void init_usart_gpio(uint8_t which)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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if( which >= USART_MAX )
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return ;
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/* Enable USART GPIO and USART clock */
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RCC_AHBPeriphClockCmd(usart_pins[which].gpio_clk, ENABLE);
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if( USART_PORT1 == which )
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RCC_APB2PeriphClockCmd(usart_pins[which].usart_clk, ENABLE);
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else
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RCC_APB1PeriphClockCmd(usart_pins[which].usart_clk, ENABLE);
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/* Connect PXx to USARTx_Tx, PXx to USARTx_Rx */
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GPIO_PinAFConfig(usart_pins[which].group, usart_pins[which].txpin_src, usart_pins[which].gpio_af);
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GPIO_PinAFConfig(usart_pins[which].group, usart_pins[which].rxpin_src, usart_pins[which].gpio_af);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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/* Configure USART Tx as alternate function push-pull */
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GPIO_InitStructure.GPIO_Pin = usart_pins[which].txpin;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(usart_pins[which].group, &GPIO_InitStructure);
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/* Configure USART1 Rx as input floating */
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GPIO_InitStructure.GPIO_Pin = usart_pins[which].rxpin;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(usart_pins[which].group, &GPIO_InitStructure);
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}
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/* º¯Êý˵Ã÷: ÅäÖô®¿ÚµÄ²¨ÌØÂÊ¡¢Êý¾Ýλ¡¢ÆæżУÑéλ¡¢Í£Ö¹Î»¡¢Á÷¿ØµÈ£»
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* ²ÎÊý˵Ã÷: whichÖ¸¶¨ÒªÅäÖõĴ®¿Ú,ÆäÖµÓ¦¸ÃΪ USART_PORT1¡¢USART_PORT2¡¢USART_PORT3£¬¶¨ÒåÔÚstm32_usart.hÖУ»
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* baudrate: ²¨ÌØÂÊ,ÆäֵΪ: 115200,9600,4800,2400,1200....
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* rxirq: ÊÇ·ñʹÄܽÓÊÕÖжϣ» 1->ʹÄÜ 0->²»Ê¹ÄÜ
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* txirq: ÊÇ·ñʹÄÜ·¢ËÍÖжϣ» 1->ʹÄÜ 0->²»Ê¹ÄÜ
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* ·µ»ØÖµ: ÎÞ
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*/
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void stm32_init_usart(uint8_t which, uint32_t baudrate, uint8_t txirq, uint8_t rxirq)
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{
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USART_InitTypeDef USART_InitStructure;
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if( which >= USART_MAX )
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return ;
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init_usart_gpio(which);
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/* Configure USART1 */
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USART_InitStructure.USART_BaudRate = baudrate; //²¨ÌØÂÊ
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USART_InitStructure.USART_WordLength = USART_WordLength_8b; //Êý¾Ýλ8λ
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USART_InitStructure.USART_StopBits = USART_StopBits_1; //ֹͣλ1λ
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USART_InitStructure.USART_Parity = USART_Parity_No; //ÎÞУÑéλ
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //ÎÞÓ²¼þÁ÷¿Ø
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
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USART_Init(usart_pins[which].USARTx, &USART_InitStructure); //ÅäÖô®¿Ú²ÎÊýº¯Êý
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#if 0 /* Not implement yet */
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if( rxirq ) //ʹÄܽÓÊÕÖжÏ
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USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);
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if( txirq ) //ʹÄÜ·¢ËÍ»º³å¿ÕÖжÏ
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USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
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#endif
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/* Enable the USARTx */
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USART_Cmd(usart_pins[which].USARTx, ENABLE);
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}
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/* º¯Êý˵Ã÷: ³õʼ»¯µ÷ÊÔ´®¿Ú,²¢Ö¸¶¨ÏàÓ¦µÄ´®¿ÚΪprintfº¯ÊýµÄÊä³ö´®¿Ú
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* ²ÎÊý˵Ã÷: whichÖ¸¶¨ÒªÅäÖõĴ®¿Ú,ÆäÖµÓ¦¸ÃΪ USART_PORT1¡¢USART_PORT2¡¢USART_PORT3£¬¶¨ÒåÔÚstm32_usart.hÖУ»
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* baudrate: ²¨ÌØÂÊ,ÆäֵΪ: 115200,9600,4800,2400,1200....
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* ·µ»ØÖµ£º ÎÞ
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*/
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void stm32_init_printf(uint8_t which, uint32_t baudrate)
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{
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if( which >= USART_MAX )
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return ;
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debug_usart = usart_pins[which].USARTx;
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/* ³õʼ»¯ USART1µÄGPIO¿Ú */
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stm32_init_usart(which, baudrate, TXIRQ_DISABLE, RXIRQ_DISABLE);
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/* Êä³öÒ»¸ö»Ø³µ, secureCRTÈí¼þ²Ù×÷´®¿ÚµÄʱºòÐèÒª */
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USART_PUTCHR(debug_usart, '\n');
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}
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/* º¯Êý˵Ã÷: printfº¯ÊýʵÏֵĹ³×Óº¯Êý
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* ²ÎÊý˵Ã÷: ch: Òª·¢Ë͵Ä×Ö·û FILE *f: δʹÓÃ
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* ·µ»ØÖµ£º ·¢Ë͵Ä×Ö·û
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*/
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int fputc(int ch, FILE *f)
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{
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/* windowsÏ»»ÐзûÊÇ\r\n,Èç¹ûÅöµ½\nÔòÔÚÇ°ÃæÌí¼Ó\r */
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if('\n' == ch)
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{
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USART_PUTCHR(debug_usart, '\r');
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}
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USART_PUTCHR(debug_usart, ch);
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return ch;
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}
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