Posted on December 22, 2014 at 17:14
Dear All,
I write a program for USART1 of STM32F0 Discovery board. I am sure that my hardware is working . I configured with PuTTY but it does not display the message
Please advice
PA10 RX to MAX 232 pin 12
PA9 TX to MAX 232 pin 11
#include ''stm32f0xx.h''
#include ''stm32f0xx_tim.h''
#include <
stm32f0xx_rcc.h
>
#include ''stm32f0xx_usart.h''
void gpio_init(){
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd (RCC_AHBPeriph_GPIOC | RCC_AHBPeriph_GPIOA,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_8 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void LED(){
GPIOC->ODR ^= GPIO_Pin_8;
}
void USART_gpio_Initialize(){
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_0);
//Configure USART1 pins: Rx and Tx ----------------------------
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void USART_Initialize(){
//Configure USART2 setting: ----------------------------
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void Send_Data(){
while(1) {
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
USART_SendData(USART1, 'A');
}
}
int main(){
gpio_init();
LED();
USART_gpio_Initialize();
USART_Initialize();
Send_Data();
//while(1){}
}
