/*
* 函数名：main
* 描述 ：主函数
* 输入 ：无
* 输出 ：无
*/
int main(void)
{
uint8_t i = 0;
/* USART1 config 115200 8-N-1 */
USART1_Config();
/* 使能CRC时钟 */
CRC_Config();
printf("\r\n 这是一个 CRC(循环冗余校验)实验 \r\n");
/* Compute the CRC of "DataBuffer" */
for(i=0; i<BUFFER_SIZE; i++ )
{
CRCValue = CRC_CalcBlockCRC((uint32_t *)DataBuffer, BUFFER_SIZE);
printf("\r\n32-bit CRC 校验码为:0X%X\r\n", CRCValue);
}
printf("\r\nCRC(循环冗余校验)测试成功\r\n");
for(;;)
{
}
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/*!< At this stage the microcontrollers clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f30x.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f30x.c file
*/
/* USART configuration -----------------------------------------------------*/
USART_Config();
/* SysTick configuration ---------------------------------------------------*/
SysTickConfig();
/* Initialize LEDs mounted on STM32303C-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
/* Configure the CRC peripheral to use the polynomial x8 + x7 + x6 + x4 + x2 + 1 */
CRC_Config(0xD5);
#ifdef MODE_TRANSMITTER
/* ------------------ USART in mode Tramitter ------------------------------*/
/* Configure the external interrupt "Joystick SEL" button */
STM_EVAL_PBInit(BUTTON_SEL, BUTTON_MODE_EXTI);
/* Forever loop */
while (1)
{
/*Wait "JOY_SEL" to start data transfer */
if ((PressedButton != JOY_NONE))
{
/* Enable the USARTx transmit data register empty interrupt */
USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
/* Set PressedButton to default value */
PressedButton = JOY_NONE;
}
}
#else
/* ------------------ USART in mode Receiver -------------------------------*/
/* Enable the USARTx receive data register not empty interrupt */
USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);
/* Infinite loop */
while(1)
{
}
#endif /* MODE_TRANSMITTER */
}
/**
* @brief Main program.
* @param None
* @retval None
*/
void CRC_32BitsCRCMessage(void)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f30x.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f30x.c file
*/
/* Initialize LEDs available on STM32303C-EVAL board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED3);
/* Configure the CRC peripheral to use the polynomial X32 + X26 + X23 + X22 +
X16 + X12 + X11 + X10 +X8 + X7 + X5 + X4 + X2+ X +1 */
CRC_Config(0x4C11DB7);
/* Compute the CRC value of the 8-bit buffer: CRCBuffer */
ComputedCRC = CRC_CalcBlockCRC(CRCBuffer, BUFFER_SIZE);
/* Check if the computed CRC matches the expected one */
if (ComputedCRC != ExpectedCRC)
{
/* Turn on LD3 */
STM_EVAL_LEDOn(LED3);
}
else
{
/* Turn on LD1 */
STM_EVAL_LEDOn(LED1);
}
/* Infinite loop */
while(1)
{
}
}
/*TASK*-------------------------------------------------------------------
*
* Task Name : CRC_main
* Comments :
* Demo application for CRC driver
*END*----------------------------------------------------------------------*/
void CRC_main
(
uint_32 initial_data
)
{
uint_32 crc_error=0;
uint_32 poly;
uint_32 tot;
uint_32 totr;
uint_32 fxor;
uint_32 tcrc;
uint_8 gbQuit = 0;
uint_32 bByteCount;
uint_8 ch;
uint_32 seed,crc;
uint_8 mode = 1;
isCRC16 = 1;
printf("\n====== CRC Lab ==========\r\n");
do
{
if (mode == 1)
{
mode = 0;
printf("\nPlease select CRC width (16-bit/32-bit):\r\n");
printf("\n1. CRC16\n");
printf("\n2. CRC32\n");
printf("\n select:");
do
{
ch = fgetc(stdin);
}while ((ch != '1') && (ch != '2'));
printf("%c\r\n",ch);
isCRC16 = !(ch-'1');
printf("\nPlease select CRC polynomial:\r\n");
printf("\n1. poly = 0x1021 (CRC-CCITT)\r\n");
printf("\n2. poly = 0x8408 (XMODEM)\r\n");
printf("\n3. poly = 0x8005 (ARC)\r\n");
printf("\n4. poly = 0x04C11DB7 (CRC32) \r\n");
printf("\n5. others\r\n");
printf("\nselect:");
do
{
ch = fgetc(stdin);
}while(!((ch < '6') && (ch > '0')));
printf("%c\r\n",ch);
if(ch == '5')
{
printf("Please enter a polynomial in hex format:");
poly = Input_Word();
}
else
{
poly = polyTab[ch-'1'];
}
tcrc = (isCRC16)? 0: 1;
printf("\nPlease select type of Transpose for input:\r\n");
printf("\n1. No Transposition\r\n");
printf("\n2. Only transpose bits in a byte\r\n");
printf("\n3. Transpose both bits and bytes\r\n");
printf("\n4. Only transpose bytes\r\n");
printf("\nselect:");
do
{
ch = fgetc(stdin);
}while (!((ch < '5') && (ch > '0')));
printf("ch = %c \r\n",ch);
tot = ch - '1';
printf("\nPlease select type of Transpose for Read:\r\n");
printf("\n1. No Transposition\r\n");
printf("\n2. Only transpose bits in a byte\r\n");
printf("\n3. Transpose both bits and bytes\r\n");
printf("\n4. Only transpose bytes\r\n");
printf("\nselect:");
do
{
ch = fgetc(stdin);
}while (!((ch < '5') && (ch > '0')));
printf("ch = %c\r\n",ch);
totr = ch - '1';
printf("XOR final checksum (y/n)?");
do
{
ch = fgetc(stdin);
}while ((ch != 'y') && (ch != 'n'));
printf("ch = %c\r\n",ch);
fxor = (ch == 'y')? 1: 0;
printf("\r\nPlease enter seed in hex:\r\n");
seed = Input_Word();
}
printf("\nPlease enter an ASCII Message:");
bByteCount = Input_Message(&strMsg[0]);
crc_error=CRC_Config(poly,tot,totr,fxor,tcrc);
if(isCRC16)
{
crc = CRC_Cal_16(seed, &strMsg[0], bByteCount);
printf("\n CRC result = %#04.4x\r\n",(crc & 0x0000FFFFL));
}
else
{
crc = CRC_Cal_32(seed, &strMsg[0], bByteCount);
printf("\n CRC result = %#08.8x\r\n",crc);
}
printf("\nPress any key to enter new data...,except 'q' to quit, 'c' to re-configuration !\r\n");
do
{
ch = fgetc(stdin);
}while( !ch );
if(ch == 'q')
{
gbQuit = 1;
}
if(ch == 'c')
{
mode = 1;
}
}while(!gbQuit);
gbQuit = 0;
printf("\nDemo is quited!\r\n");
}