| 提交 | 用户 | age | ||
| 076cda | 1 | #include "stm32f0xx.h" |
| Q | 2 | |
| 3 | void SPI2_Int() | |
| 4 | { | |
| 5 | /* | |
| 6 | SPI_InitTypeDef SPI_InitStruct; | |
| 7 | ||
| 16eeda | 8 | SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//全双工模式 |
| 076cda | 9 | SPI_InitStruct.SPI_Mode = SPI_Mode_Master; |
| Q | 10 | SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; |
| 16eeda | 11 | SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;//第一个边沿 |
| Q | 12 | SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;//上升沿捕获 |
| 076cda | 13 | SPI_InitStruct.SPI_NSS = SPI_NSS_Soft; |
| Q | 14 | SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16; // 6MHz |
| 15 | SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB; | |
| 16 | SPI_InitStruct.SPI_CRCPolynomial = 7; | |
| 17 | SPI_Init(SPI2,&SPI_InitStruct); | |
| 18 | ||
| 19 | SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF); | |
| 20 | SPI_Cmd(SPI2, ENABLE ); | |
| 21 | */ | |
| 22 | } | |
| 23 | ||
| 24 | /*! | |
| 25 | * @brief Sends txBuffer and receives rxBuffer | |
| 26 | * | |
| 27 | * @param [IN] txBuffer Byte to be sent | |
| 28 | * @param [OUT] rxBuffer Byte to be sent | |
| 29 | * @param [IN] size Byte to be sent | |
| 30 | */ | |
| 31 | #define TIMEOUT 50 | |
| 32 | uint8_t SpiInOut( uint8_t txBuffer) | |
| 33 | { | |
| 34 | /* | |
| 16eeda | 35 | while( SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);//当发送buffer为空时(说明上一次数据已复制到移位寄存器中)退出,这时可以往buffer里面写数据 |
| 076cda | 36 | SPI_SendData8(SPI2, txBuffer); |
| Q | 37 | |
| 16eeda | 38 | while( SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);//当接收buffer为非空时退出 |
| 076cda | 39 | return SPI_ReceiveData8(SPI2); |
| Q | 40 | |
| 41 | */ | |
| 42 | ||
| 43 | int timeout_cnt= 0; | |
| 44 | uint8_t value; | |
| 45 | while (LL_SPI_IsActiveFlag_TXE(SPI1) == RESET) {timeout_cnt++; if (timeout_cnt>TIMEOUT) break; } | |
| 46 | LL_SPI_TransmitData8(SPI1,txBuffer); | |
| 47 | timeout_cnt= 0; while (LL_SPI_IsActiveFlag_BSY(SPI1) == SET) {timeout_cnt++; if (timeout_cnt>TIMEOUT) break; } | |
| 48 | timeout_cnt= 0; while (LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET) { timeout_cnt++; if (timeout_cnt>TIMEOUT) break;} | |
| 49 | value = LL_SPI_ReceiveData8( SPI1); | |
| 50 | ||
| 51 | return value; | |
| 52 | } | |
| 53 | ||
| 54 | void SpiIn( uint8_t *txBuffer, uint16_t size ) | |
| 55 | { | |
| 56 | ||
| 57 | uint16_t i; | |
| 58 | ||
| 59 | for(i=0;i<size;i++) | |
| 60 | { | |
| 16eeda | 61 | while( LL_SPI_IsActiveFlag_TXE(SPI1) == RESET);//当发送buffer为空时(说明上一次数据已复制到移位寄存器中)退出,这时可以往buffer里面写数据 |
| 076cda | 62 | LL_SPI_TransmitData8(SPI1,txBuffer[i]); |
| 16eeda | 63 | while( LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET);//当接收buffer为非空时退出 |
| 076cda | 64 | LL_SPI_ReceiveData8( SPI1); |
| Q | 65 | } |
| 66 | ||
| 67 | } | |
| 68 | ||
| 69 | ||
