Posted on January 03, 2008 at 12:14Init UART
void init_UARTS_(38400){
UART_InitTypeDef UART_InitStruct;
GPIO_InitTypeDef GPIO_InitStructure;
/*Enable Clock for UART*/
CFG_PeripheralClockConfig(CFG_CLK_UART0 , ENABLE);
CFG_PeripheralClockConfig(CFG_CLK_UART2 , ENABLE);
CFG_PeripheralClockConfig(CFG_CLK_UART3 , ENABLE);
/* Configure the GPIO Tx pins as alternate function push pull*/
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pins = RS485_Tx_Pin;
GPIO_Init (GPIO6, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pins = UART2_Tx_Pin + UART3_Tx_Pin;
GPIO_Init (GPIO5, &GPIO_InitStructure);
// Configure UART RX pins as Tristate TTL
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_TRI_TTL;
GPIO_InitStructure.GPIO_Pins = RS485_Rx_Pin; // + UART3_Rx_Pin ;
GPIO_Init (GPIO6, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pins = UART2_Rx_Pin;
GPIO_Init (GPIO5, &GPIO_InitStructure);
/* UART Configuration */
UART_StructInit(&UART_InitStruct); //Initialize Structure with default values
UART_InitStruct.UART_BaudRate = baudrate; // Baud rate value
UART_InitStruct.UART_Mode = UART_Mode_8D ; //Set the UARTx Mode 8 bit Data
UART_InitStruct.UART_Loop_Standard = UART_Standard; //Disable LoopBack
UART_InitStruct.UART_StopBits = UART_StopBits_1; // STOP bits number/
UART_InitStruct.UART_FIFO = UART_FIFO_Enable;
UART_InitStruct.UART_Rx = UART_Rx_Enable; /*enable receive*/
UART_Cmd(UART0, ENABLE);
UART_Cmd(UART2, ENABLE);
UART_Cmd(UART3, ENABLE);
UART_Init(UART0, &UART_InitStruct);
UART_Init(UART3, &UART_InitStruct);
UART_Init(UART2, &UART_InitStruct);
***************
read functionunsigned char read_input_function(){
retries++;
while((UART_FlagStatus(UART0, UART_Flag_RxBufFull)==0) && (retries >0))
retries--;
if (retries == 0){
error_flag = 1;
return RESPONSE_TIMEOUT;
}else{
return UART_ByteReceive(UART0);
}
}
***********
main()
char input[99];
for (i = 0; ((i
input[i]=read_input();
}
********'
Works fine, However after my first read, lets say 70bytes. I send a package again and start the read again but this time the read will only read 16 bytes, sometimes only 1 byte. But i if i stop, reset and run the project from start the read will be complete just like the first time.
It seems illogical and intermittent.
Do you have any ideas?
