forked from SZV10X_Software/SZV103_FM33A0xxEV_SiZhu
HARDWARE/SPI/SPI.c
@@ -1,134 +1,68 @@ /****************************************************************************** * Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD. * *----------------------------------------------------------------------------- * File: spi.c * Description: spi gpio config , receive and send data code * Author: Lishoujian (867693272@qq.com) * Date: Jan 8, 2015 *****************************************************************************/ /* ----------------------- Platform includes --------------------------------*/ #include "spi.h" #include "stm32f10x.h" #include "systaskinit.h" #include "gpio.h" /****************************************** * func: SPI3_ioconfig * desc: config gpio;initialize hardware interface of spi3 * input: none * output: none * return: none *****************************************/ void Fram_Flash_SPI_Init(void) void SPI3_Init(void) { SPI_InitTypeDef SPI_InitStructure; SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //CPOL low SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //CPOA first edge SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; //Baud Rate Prescaler is 256 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //send and receive data begin with high bit SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_Init(Fram_Flash_SPI_NUM, &SPI_InitStructure); SPI_Cmd(Fram_Flash_SPI_NUM, ENABLE); //Enable SPI3 } /****************************************** * func: SPI_ReadWriteByte * desc: spi receive and send data * input: SPIx - SPI port , TxData - send data * output: none * return: the data received by spi *****************************************/ u8 SPI_ReadWriteByte(SPI_TypeDef* SPIx,u8 TxData) { u8 retry=0; while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:·¢ËÍ»º´æ¿Õ±ê־λ { retry++; if(retry>200)return 0; } SPI_I2S_SendData(SPIx, TxData); //ͨ¹ýÍâÉèSPIx·¢ËÍÒ»¸öÊý¾Ý retry=0; while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:½ÓÊÜ»º´æ·Ç¿Õ±ê־λ { retry++; if(retry>200)return 0; } return SPI_I2S_ReceiveData(SPIx); //·µ»Øͨ¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý } u8 SPI1_ReadWriteByte(u8 TxData) { u8 retry=0; while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:·¢ËÍ»º´æ¿Õ±ê־λ { retry++; if(retry>200)return 0; } SPI_I2S_SendData(SPI1, TxData); //ͨ¹ýÍâÉèSPIx·¢ËÍÒ»¸öÊý¾Ý retry=0; CMU_PERCLK_SetableEx(PADCLK, ENABLE); //PADʱÖÓ£¨GPIO£©Ê¹Äܺ¯Êý while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:½ÓÊÜ»º´æ·Ç¿Õ±ê־λ { retry++; if(retry>200) return 0; } // AltFunIO(GPIOF, GPIO_Pin_15, ALTFUN_NORMAL); // SSN AltFunIO(SPI3_PORT, SPI3_SCK_PIN, ALTFUN_NORMAL); // SCK AltFunIO(SPI3_PORT, SPI3_MISO_PIN, ALTFUN_NORMAL); // MISO AltFunIO(SPI3_PORT, SPI3_MOSI_PIN, ALTFUN_NORMAL); // MOSI return SPI_I2S_ReceiveData(SPI1); //·µ»Øͨ¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý CMU_PERCLK_SetableEx(SPI3CLK, ENABLE); //¿ªÆôSPI3×ÜÏßʱÖÓ SPIx_CR1_IOSWAP_Set(SPI3, SPIx_CR1_IOSWAP_DEFAULT); // MISO¡¢MOSIĬÈÏÒý½Å ²»½»»» SPIx_CR1_MM_Set(SPI3, SPIx_CR1_MM_MASTER); //masterģʽ SPIx_CR1_WAIT_Set(SPI3, SPIx_CR1_WAIT_1WAIT); // ÿ·¢ËÍÍêÒ»Ö¡ºó²åÈëÒ»¸öCLK SPIx_CR1_BAUD_Set(SPI3, SPIx_CR1_BAUD_DIV4); //²¨ÌØÂÊÉèÖÃΪÍâÉèʱÖÓ2·ÖƵ SPIx_CR1_LSBF_Set(SPI3, SPIx_CR1_LSBF_MSB); //Ö¡¸ñʽÏÈ·¢ËÍMSB SPIx_CR1_CPHOL_Set(SPI3, SPIx_CR1_CPHOL_LOW); //CLKÍ£Ö¹Ôڵ͵çƽ SPIx_CR1_CPHA_Set(SPI3, SPIx_CR1_CPHA_1CLOCK); //µÚÒ»¸öʱÖÓ±ßÑز¶×½ SPIx_CR2_SSNSEN_Setable(SPI3, DISABLE); //SSNÓÉÓ²¼þ¿ØÖÆ SPIx_CR2_RXO_Setable(SPI3, DISABLE); //SPIÉèÖÃΪȫ˫¹¤ SPIx_CR2_DLEN_Set(SPI3, SPIx_CR2_DLEN_8BIT); //ͨÐÅÊý¾Ý×Ö³¤8bit SPIx_CR2_HALFDUPLEX_Set(SPI3, SPIx_CR2_HALFDUPLEX_SPI); //SPIÉèÖÃΪ±ê×¼SPIģʽ SPIx_CR2_SSNM_Set(SPI3, SPIx_CR2_SSNM_LOW); //ÿ´Î·¢Íêmasterºóssn±£³ÖµÍ SPIx_CR2_TXO_AC_Setable(SPI3, DISABLE); //¹Ø±ÕTXONLY×Ô¶¯Çå0 SPIx_CR2_TXO_Setable(SPI3, DISABLE); //¹Ø±ÕTXONLYģʽ // SPIx_CR2_SSN_Set(SPI3, SPIx_CR2_SSN_HIGH); //SSNSENΪ£±Ê±SNNÊä³ö¸ßµçƽ SPIx_CR3_SERRC_Clr(SPI3); //Çå³ý´Ó»ú´íÎó±êÖ¾ SPIx_CR3_MERRC_Clr(SPI3); //Çå³ýÖ÷»ú´íÎó±êÖ¾ SPIx_CR3_RXBFC_Clr(SPI3); //Çå³ýRXBUF SPIx_CR3_TXBFC_Clr(SPI3); //Çå³ýTXBUF SPIx_CR2_SPIEN_Setable(SPI3, ENABLE); //ʹÄÜSPI3 } u8 SPI3_ReadWriteByte(u8 TxData) { uint8 retry=0; while (SPI_I2S_GetFlagStatus( SPI3, SPI_I2S_FLAG_TXE) == RESET) //send buffer empty flag { retry++; if(retry>200)return 0; } SPI_I2S_SendData(SPI3, TxData); //send data retry=0; while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) //receive buffer not empty flag { retry++; if(retry>200)return 0; } return SPI_I2S_ReceiveData(SPI3); //return received data uint8_t SpiWriteAndRead(uint32_t data) { SPIx_TXBUF_Write(SPI3, data); while (!SPIx_ISR_TXBE_Chk(SPI3)); while (!SPIx_ISR_RXBF_Chk(SPI3)); data = SPIx_RXBUF_Read(SPI3); return data; } void SpiWrite(uint8_t *data, uint32_t length) { while (length--) { SpiWriteAndRead(*data); data++; } } u8 SPI2_ReadWriteByte(u8 TxData) { uint8 retry=0; while (SPI_I2S_GetFlagStatus( SPI2, SPI_I2S_FLAG_TXE) == RESET) //send buffer not empty flag { retry++; if(retry>200)return 0; } SPI_I2S_SendData(SPI2, TxData); //send data retry=0; while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET) //receive buffer not empty flag { retry++; if(retry>255)return 0; } return SPI_I2S_ReceiveData(SPI2); //return reveived data void SpiRead(uint8_t *data, uint32_t length) { while (length--) { *data = SpiWriteAndRead(0x00); data++; } }
