GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
//__IO uint32_t count= 0x100000; // 5 bits per second, for testing
while(count--);
}
+
+/* Used for debugging only.
+
void ledon(){
GPIO_SetBits(GPIOD, GPIO_Pin_14);
}
GPIO_ResetBits(GPIOD, GPIO_Pin_12);
}
+
+
void spibit(int one){
if(one) ledon();
else ledoff();
}
}
-
+*/
//! Count the length of a string.
uint32_t strlen(const char *s){
}
-//! Initialize the USART
-void usartinit(){
- USART_InitTypeDef USART_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_ClockInitTypeDef USART_ClockInitStruct;
-
- /* Enable GPIOA and USART1 clock */
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
-
- //USART1 and USART6, other in APB1
+/**************************************************************************************/
+void Repair_Data();
+void RCC_Configuration(void)
+{
+ /* --------------------------- System Clocks Configuration -----------------*/
+ /* USART1 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
- /* A 9 to USART1_Tx
- * A10 to USART1_Rx
- * A11 to USART1_CTS
- * A12 to USART1_RTS
- */
- GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
- GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
- GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_USART1);
- GPIO_PinAFConfig(GPIOA, GPIO_PinSource12, GPIO_AF_USART1);
- /* Configure USART Tx and Rx as alternate function push-pull */
+ /* GPIOB clock enable */
+ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
+}
+
+/**************************************************************************************/
+
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /*-------------------------- GPIO Configuration ----------------------------*/
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
-
-
- USART_StructInit(&USART_InitStructure);
- USART_InitStructure.USART_BaudRate = 9600;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+ /* Connect USART pins to AF */
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_USART1); // USART1_TX
+ GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_USART1); // USART1_RX
+}
+
+/**************************************************************************************/
+
+void USART1_Configuration(void)
+{
+ USART_InitTypeDef USART_InitStructure;
+
+ /* USARTx configuration ------------------------------------------------------*/
+ /* USARTx configured as follow:
+ - BaudRate = 115200 baud
+ - Word Length = 8 Bits
+ - One Stop Bit
+ - No parity
+ - Hardware flow control disabled (RTS and CTS signals)
+ - Receive and transmit enabled
+ */
+ //USART_InitStructure.USART_BaudRate = 9600;
+ //USART_InitStructure.USART_BaudRate = 10000; //Close enough to 9600
+ //USART_InitStructure.USART_BaudRate = 115200;
+ USART_InitStructure.USART_BaudRate = 125200; //Close enough to 115200
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
- USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+ USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
+
USART_Init(USART1, &USART_InitStructure);
-
-
- USART_ClockStructInit(&USART_ClockInitStruct);
- USART_ClockInit(USART1,&USART_ClockInitStruct);
-
+
USART_Cmd(USART1, ENABLE);
}
+
+
+//! Initialize the USART
+void usartinit(){
+ RCC_Configuration();
+
+ GPIO_Configuration();
+
+ USART1_Configuration();
+}
//! Initialize the STM32F4xx ports and USB.
void stm32f4xx_init(){
int i=20;
- //SystemInit();
- usartinit();
+ SystemInit();
ioinit();
+ usartinit();
- ledoff();
- clkoff();
+ while(i--) stmdelay();
+
+ serial0_tx(0xAA);
return;
}
//! Receive a byte.
unsigned char serial0_rx(){
+ while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET); // Wait for Character
+ return USART_ReceiveData(USART1);
}
//! Receive a byte.
//! Transmit a byte.
void serial0_tx(unsigned char x){
+
+ //Send through USART1 on PB6
+ while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); //original
USART_SendData(USART1, (uint16_t) x);
- //while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
- spibyte(x);
+ //Spare goes to SPI.
+ //spibyte(x);
}
//! Transmit a byte on the second UART.