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+/**
+ ******************************************************************************
+ * @file SPI/CRC/main.c
+ * @author MCD Application Team
+ * @version V3.5.0
+ * @date 08-April-2011
+ * @brief Main program body
+ ******************************************************************************
+ * @attention
+ *
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+ *
+ * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x.h"
+
+/** @addtogroup STM32F10x_StdPeriph_Examples
+ * @{
+ */
+
+/** @addtogroup SPI_CRC
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
+
+/* Private define ------------------------------------------------------------*/
+#define BufferSize 32
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+SPI_InitTypeDef SPI_InitStructure;
+uint16_t SPI1_Buffer_Tx[BufferSize] = {0x0102, 0x0304, 0x0506, 0x0708, 0x090A, 0x0B0C,
+ 0x0D0E, 0x0F10, 0x1112, 0x1314, 0x1516, 0x1718,
+ 0x191A, 0x1B1C, 0x1D1E, 0x1F20, 0x2122, 0x2324,
+ 0x2526, 0x2728, 0x292A, 0x2B2C, 0x2D2E, 0x2F30,
+ 0x3132, 0x3334, 0x3536, 0x3738, 0x393A, 0x3B3C,
+ 0x3D3E, 0x3F40};
+uint16_t SPI2_Buffer_Tx[BufferSize] = {0x5152, 0x5354, 0x5556, 0x5758, 0x595A, 0x5B5C,
+ 0x5D5E, 0x5F60, 0x6162, 0x6364, 0x6566, 0x6768,
+ 0x696A, 0x6B6C, 0x6D6E, 0x6F70, 0x7172, 0x7374,
+ 0x7576, 0x7778, 0x797A, 0x7B7C, 0x7D7E, 0x7F80,
+ 0x8182, 0x8384, 0x8586, 0x8788, 0x898A, 0x8B8C,
+ 0x8D8E, 0x8F90};
+uint16_t SPI1_Buffer_Rx[BufferSize], SPI2_Buffer_Rx[BufferSize];
+uint32_t TxIdx = 0, RxIdx = 0;
+__IO uint16_t CRC1Value = 0, CRC2Value = 0;
+volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
+
+/* Private functions ---------------------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength);
+
+/**
+ * @brief Main program
+ * @param None
+ * @retval None
+ */
+int main(void)
+{
+ /*!< At this stage the microcontroller clock setting is already configured,
+ this is done through SystemInit() function which is called from startup
+ file (startup_stm32f10x_xx.s) before to branch to application main.
+ To reconfigure the default setting of SystemInit() function, refer to
+ system_stm32f10x.c file
+ */
+
+ /* System clocks configuration ---------------------------------------------*/
+ RCC_Configuration();
+
+ /* GPIO configuration ------------------------------------------------------*/
+ GPIO_Configuration();
+
+ /* SPI1 configuration ------------------------------------------------------*/
+ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
+ SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
+ SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
+ SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
+ SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
+ SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
+ SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
+ SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
+ SPI_InitStructure.SPI_CRCPolynomial = 7;
+ SPI_Init(SPI1, &SPI_InitStructure);
+
+ /* SPI2 configuration ------------------------------------------------------*/
+ SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
+ SPI_Init(SPI2, &SPI_InitStructure);
+
+ /* Enable SPI1 CRC calculation */
+ SPI_CalculateCRC(SPI1, ENABLE);
+ /* Enable SPI2 CRC calculation */
+ SPI_CalculateCRC(SPI2, ENABLE);
+
+ /* Enable SPI1 */
+ SPI_Cmd(SPI1, ENABLE);
+ /* Enable SPI2 */
+ SPI_Cmd(SPI2, ENABLE);
+
+ /* Transfer procedure */
+ while (TxIdx < BufferSize - 1)
+ {
+ /* Wait for SPI1 Tx buffer empty */
+ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
+ /* Send SPI2 data */
+ SPI_I2S_SendData(SPI2, SPI2_Buffer_Tx[TxIdx]);
+ /* Send SPI1 data */
+ SPI_I2S_SendData(SPI1, SPI1_Buffer_Tx[TxIdx++]);
+ /* Wait for SPI2 data reception */
+ while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
+ /* Read SPI2 received data */
+ SPI2_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI2);
+ /* Wait for SPI1 data reception */
+ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
+ /* Read SPI1 received data */
+ SPI1_Buffer_Rx[RxIdx++] = SPI_I2S_ReceiveData(SPI1);
+ }
+
+ /* Wait for SPI1 Tx buffer empty */
+ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
+ /* Wait for SPI2 Tx buffer empty */
+ while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
+
+ /* Send last SPI2_Buffer_Tx data */
+ SPI_I2S_SendData(SPI2, SPI2_Buffer_Tx[TxIdx]);
+ /* Enable SPI2 CRC transmission */
+ SPI_TransmitCRC(SPI2);
+ /* Send last SPI1_Buffer_Tx data */
+ SPI_I2S_SendData(SPI1, SPI1_Buffer_Tx[TxIdx]);
+ /* Enable SPI1 CRC transmission */
+ SPI_TransmitCRC(SPI1);
+
+ /* Wait for SPI1 last data reception */
+ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
+ /* Read SPI1 last received data */
+ SPI1_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI1);
+
+ /* Wait for SPI2 last data reception */
+ while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
+ /* Read SPI2 last received data */
+ SPI2_Buffer_Rx[RxIdx] = SPI_I2S_ReceiveData(SPI2);
+
+ /* Wait for SPI1 data reception: CRC transmitted by SPI2 */
+ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
+ /* Wait for SPI2 data reception: CRC transmitted by SPI1 */
+ while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
+
+ /* Check the received data with the send ones */
+ TransferStatus1 = Buffercmp(SPI2_Buffer_Rx, SPI1_Buffer_Tx, BufferSize);
+ TransferStatus2 = Buffercmp(SPI1_Buffer_Rx, SPI2_Buffer_Tx, BufferSize);
+ /* TransferStatus1, TransferStatus2 = PASSED, if the data transmitted and received
+ are correct */
+ /* TransferStatus1, TransferStatus2 = FAILED, if the data transmitted and received
+ are different */
+
+ /* Test on the SPI1 CRC Error flag */
+ if ((SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_CRCERR)) == SET)
+ {
+ TransferStatus2 = FAILED;
+ }
+
+ /* Test on the SPI2 CRC Error flag */
+ if ((SPI_I2S_GetFlagStatus(SPI2, SPI_FLAG_CRCERR)) == SET)
+ {
+ TransferStatus1 = FAILED;
+ }
+
+ /* Read SPI1 received CRC value */
+ CRC1Value = SPI_I2S_ReceiveData(SPI1);
+ /* Read SPI2 received CRC value */
+ CRC2Value = SPI_I2S_ReceiveData(SPI2);
+
+ while (1)
+ {}
+}
+
+/**
+ * @brief Configures the different system clocks.
+ * @param None
+ * @retval None
+ */
+void RCC_Configuration(void)
+{
+ /* PCLK2 = HCLK/2 */
+ RCC_PCLK2Config(RCC_HCLK_Div2);
+
+ /* Enable peripheral clocks --------------------------------------------------*/
+ /* GPIOA, GPIOB and SPI1 clock enable */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
+ RCC_APB2Periph_SPI1, ENABLE);
+
+ /* SPI2 Periph clock enable */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
+}
+
+/**
+ * @brief Configures the different GPIO ports.
+ * @param None
+ * @retval None
+ */
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /* Configure SPI1 pins: SCK, MISO and MOSI ---------------------------------*/
+ /* Confugure SCK and MOSI pins as Alternate Function Push Pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+ /* Confugure MISO pin as Input Floating */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ /* Configure SPI2 pins: SCK, MISO and MOSI ---------------------------------*/
+ /* Confugure SCK and MOSI pins as Input Floating */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+ /* Confugure MISO pin as Alternate Function Push Pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+}
+
+/**
+ * @brief Compares two buffers.
+ * @param pBuffer1, pBuffer2: buffers to be compared.
+ * @param BufferLength: buffer's length
+ * @retval PASSED: pBuffer1 identical to pBuffer2
+ * FAILED: pBuffer1 differs from pBuffer2
+ */
+TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
+{
+ while (BufferLength--)
+ {
+ if (*pBuffer1 != *pBuffer2)
+ {
+ return FAILED;
+ }
+
+ pBuffer1++;
+ pBuffer2++;
+ }
+
+ return PASSED;
+}
+
+#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\r\n", file, line) */
+
+ /* Infinite loop */
+ while (1)
+ {}
+}
+
+#endif
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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