Posted on September 30, 2015 at 16:14
Try this, a quick blind hack of something that should at least function
#include <
stdio.h
>
#include ''main.h''
static const char String1[] = ''ENTER THE OPERATION
'';
static const char String2[] = ''1 FOR ADDITION 2 FOR SUBTRACTION
'';
static const char String3[] = ''ENTER 1ST NUMBER
'';
static const char String4[] = ''ENTER 2ND NUMBER
'';
int val;
int x;
int y;
int ANS;
void USART1Configuration(void);
void OutString(const char *s);
char GetChar(void);
void Demo(void);
void START_1(void);
void START_2(void);
void CALCULATE(void);
void GET_NUMBER1(void);
void STORE_NUMBER1(void);
void GET_NUMBER2(void);
void STORE_NUMBER2(void);
void GET_OPERATION(void);
void DISPLAY(void);
int main(void)
{
if (SysTick_Config(SystemCoreClock / 1000))
{
while(1);
}
STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
STM_EVAL_LEDInit(LED5);
STM_EVAL_LEDInit(LED6);
USART1Configuration();
while(1)
{
Demo();
}
}
void USART1Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_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 OutString(const char *s)
{
while(*s) // Not NUL
{
if (USART_GetFlagStatus(USART1, USART_FLAG_TXE) != RESET) // if it's empty
USART_SendData(USART1, *s++); // Out char, and advance
}
}
char GetChar(void)
{
char ch;
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET); // wait while no data
ch = (char)USART_ReceiveData(USART1);
return(ch);
}
void Demo(void)
{
START_1();
START_2();
GET_OPERATION();
GET_NUMBER1();
STORE_NUMBER1();
GET_NUMBER2();
STORE_NUMBER2();
CALCULATE();
DISPLAY();
}
void START_1(void)
{
OutString(String1);
}
void START_2(void)
{
OutString(String2);
}
void GET_OPERATION(void)
{
while(1)
{
val = GetChar();
if ((val == '1') || (val == '2')) // A valid response?
return;
}
}
void GET_NUMBER1(void)
{
OutString(String3);
}
void STORE_NUMBER1(void)
{
while(1)
{
x = GetChar();
if ((x >= '0') && (x <= '9')) // A valid digit?
{
x = x - '0'; // Convert ASCII digit to decimal
return;
}
}
}
void GET_NUMBER2(void)
{
OutString(String4);
}
void STORE_NUMBER2(void)
{
while(1)
{
y = GetChar();
if ((y >= '0') && (y <= '9')) // A valid digit?
{
y = y - '0'; // Convert ASCII digit to decimal
return;
}
}
}
void CALCULATE(void)
{
switch(val)
{
case '1': ANS = x + y; break;
case '2': ANS = x - y; break;
default: ANS = 0; break;
}
}
void DISPLAY(void)
{
char Buffer[16];
sprintf(Buffer, ''%d
'', ANS); // Convert to ASCII string could be value between -9 and 18
OutString(Buffer);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d
'', file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
