1 | /***************************************************************************//**
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2 | * Global macros
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3 | ******************************************************************************/
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4 |
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5 | #define LED_PORT GPIOC
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6 | #define BUTTON_PORT GPIOA
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7 |
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8 | #define LED_BLUE GPIO_Pin_8
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9 | #define LED_GREEN GPIO_Pin_9
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10 |
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11 | #define BUTTON_BLUE GPIO_Pin_0
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12 |
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13 | [...]
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14 |
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15 | /* Enable GPIO clock */
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16 | RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC, ENABLE);
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17 | RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2, ENABLE);
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18 |
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19 | // Port C -> LEDs
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20 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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21 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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22 | GPIO_InitStructure.GPIO_Pin = LED_GREEN | LED_BLUE;
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23 | GPIO_Init(LED_PORT, &GPIO_InitStructure);
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24 |
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25 | // Port A -> blue button
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26 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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27 | GPIO_InitStructure.GPIO_Pin = BUTTON_BLUE;
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28 | GPIO_Init(BUTTON_PORT, &GPIO_InitStructure);
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29 |
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30 | /* Configure USART2 Rx (PA3) as input floating */
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31 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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32 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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33 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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34 |
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35 | /* Configure USART2 Tx (PA2) as alternate function push-pull */
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36 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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37 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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38 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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39 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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40 |
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41 | /* USART2 configured as follow:
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42 | - BaudRate = 115200 baud
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43 | - Word Length = 8 Bits
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44 | - One Stop Bit
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45 | - No parity
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46 | - Hardware flow control disabled (RTS and CTS signals)
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47 | - Receive and transmit enabled
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48 | - USART Clock disabled
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49 | - USART CPOL: Clock is active low
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50 | - USART CPHA: Data is captured on the middle
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51 | - USART LastBit: The clock pulse of the last data bit is not output to
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52 | the SCLK pin
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53 | */
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54 | USART_InitStructure.USART_BaudRate = 115200;
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55 | USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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56 | USART_InitStructure.USART_StopBits = USART_StopBits_1;
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57 | USART_InitStructure.USART_Parity = USART_Parity_No ;
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58 | USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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59 | USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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60 | USART_Init(USART2, &USART_InitStructure);
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61 | USART_Cmd( USART2, ENABLE);
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