| 137 | while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); |
| 138 | /* 选择SYSCLK时钟源为PLL */ |
| 139 | RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); |
| 140 | /* 等待PLL成为SYSCLK时钟源 */ |
| 141 | while(RCC_GetSYSCLKSource() != 0x08); |
| 142 | } |
| 143 | /* 打开APB2总线上的GPIOA时钟*/ |
| 144 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_USART1, ENABLE); |
| 145 |
| 146 | //RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); |
| 147 |
| 148 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1|RCC_APB1Periph_I2C2,ENABLE); |
| 149 | //RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP|RCC_APB1Periph_WWDG|RCC_APB1Periph_SPI2, ENABLE); |
| 150 |
| 151 | } |
| 152 |
| 153 |
| 154 | void USART_Configuration(void) |
| 155 | { |
| 156 | USART_InitTypeDef USART_InitStructure; |
| 157 | USART_ClockInitTypeDef USART_ClockInitStructure; |
| 158 |
| 159 | USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; |
| 160 | USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; |
| 161 | USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; |
| 162 | USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; |
| 163 | USART_ClockInit(USART1 , &USART_ClockInitStructure); |
| 164 |
| 165 | USART_InitStructure.USART_BaudRate = 9600; |
| 166 | USART_InitStructure.USART_WordLength = USART_WordLength_8b; |
| 167 | USART_InitStructure.USART_StopBits = USART_StopBits_1; |
| 168 | USART_InitStructure.USART_Parity = USART_Parity_No; |
| 169 | USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
| 170 | USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; |
| 171 | USART_Init(USART1,&USART_InitStructure); |
| 172 |
| 173 | USART_Cmd(USART1,ENABLE); |
| 174 | } |
| 175 |
| 176 | #if PRINTF_ON |
| 177 |
| 178 | int fputc(int ch,FILE *f) |
| 179 | { |
| 180 | USART_SendData(USART1,(u8) ch); |
| 181 | while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET); |
| 182 | return ch; |
| 183 | } |
| 184 |
| 185 | #endif |
stm32f10x_it.c
| 01 | #include "stm32f10x_it.h" |
| 02 | #include "stdio.h" |
| 03 |
| 04 | extern u32 BufferSize ; |
| 05 | extern u8 I2C1_ADDRESS ; |
| 06 | extern u8 I2C2_ADDRESS ; |
| 07 |
| 08 | extern vu8 I2C1_Buffer_Tx[]; |
| 09 | extern vu8 I2C2_Buffer_Rx[]; |
| 10 | vu32 Tx_Counter = 0; |
| 11 | vu32 Rx_Counter = 0; |
| 12 |
| 13 | void I2C1_EV_IRQHandler(void) |
| 14 | { |
| 15 | switch(I2C_GetLastEvent(I2C1)) |
| 16 | { |
| 17 | case I2C_EVENT_MASTER_MODE_SELECT: //已发送启始条件 |
| 18 | { |
| 19 | I2C_Send7bitAddress(I2C1,I2C2_ADDRESS,I2C_Direction_Transmitter); |
| 20 | break; |
| 21 | } |
| 22 | case I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED: //已发送从机地址 |
| 23 | { |
| 24 | printf("\r\n The I2C1 has send data %d \r\n",I2C1_Buffer_Tx[Rx_Counter]); |
| 25 | I2C_SendData(I2C1,I2C1_Buffer_Tx[Tx_Counter++]); |
| 26 | break; |
| 27 | } |
| 28 | case I2C_EVENT_MASTER_BYTE_TRANSMITTED: //第一个数据已发送 |
| 29 | { |
| 30 | if(Tx_Counter |
| 31 | { |
| 32 | printf("\r\n The I2C1 has send data %d \r\n",I2C1_Buffer_Tx[Rx_Counter]); |
| 33 | I2C_SendData(I2C1,I2C1_Buffer_Tx[Tx_Counter++]); |
| 34 |
| 35 | }else{ |
| 36 | I2C_GenerateSTOP(I2C1,ENABLE); |
| 37 | I2C_ITConfig(I2C1,I2C_IT_EVT|I2C_IT_BUF,DISABLE); //计数发送的个数 |
| 38 | } |
| 39 |
| 40 | break; |
| 41 | } |
| 42 | default: {break;} |
| 43 | } |
| 44 | } |
| 45 |
| 46 |
| 47 | void I2C2_EV_IRQHandler(void) |
| 48 | { |
| 49 | switch(I2C_GetLastEvent(I2C2)) |
| 50 | { |
| 51 | case I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED: //收到匹配的地址数据 |
| 52 | { |
| 53 | break; |
| 54 | } |
| 55 | case I2C_EVENT_SLAVE_BYTE_RECEIVED: //收到数据 |
| 56 | { |
| 57 | if(Rx_Counter < BufferSize ) |
| 58 | { |
| 59 | I2C2_Buffer_Rx[Rx_Counter] = I2C_ReceiveData(I2C2); |
| 60 | printf("\r\n The I2C2 has received data %d \r\n",I2C2_Buffer_Rx[Rx_Counter++]); //计数收到的个数 |
| 61 | } |
| 62 | break; |
| 63 | } |
| 64 | case I2C_EVENT_SLAVE_STOP_DETECTED: //收到结束条件 |
| 65 | { |
| 66 | I2C_ClearFlag(I2C2,I2C_FLAG_STOPF); |
| 67 | I2C_ITConfig(I2C1,I2C_IT_EVT|I2C_IT_BUF,DISABLE); |
| 68 |
| 69 | break; |
| 70 | } |
| 71 | default: {break;} |
| 72 | } |
| 73 | } |
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