Posted on December 28, 2012 at 01:21
Hello All,
I'm sending data over a bluetooth device to the stm32 discovery board on usart 2. Everything is great unless I send a large amount of data (80 bytes). If I send this large amount I only end up actually getting 8 bytes and the ORE error is set. I've read up on all the other posts and tried to implement the solutions but it had no effect what so ever. I must be doing something stupid here. Why would it always stop on 8 bytes ?
/**
* @brief
*
*
* @note
* @param none
* @retval none
*/
void USART2_Config(void)
{
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//Usart2_GPIO();
GPIO_InitTypeDef GPIO_InitStructure;
#ifndef STM32F10X_LD_VL
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#
endif
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_Cmd(USART2, DISABLE);
/* Enable the USARTz Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = UARTBAUD;
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_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
// enable this int to trigger dma ?
//USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
//USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
// setup dma for usart
USART_DMACmd(USART2, USART_DMAReq_Tx | USART_DMAReq_Rx, ENABLE);
// hold onto your butts
USART_Cmd(USART2, ENABLE);
}
void USART2_IRQHandler(void)
{
u8 statusReg = 0;
statusReg = (int8_t)(USART2->SR & (uint8_t)0xFF);
//read status
while
(statusReg & (USART_FLAG_RXNE | USART_FLAG_ORE))
{
rxByte = USART_ReceiveData(USART2);
// if we were getting data store it
if
(statusReg & USART_FLAG_RXNE)
{
cbWrite(&rxUSCBuff, &rxByte);
if
(cbIsFull(&rxUSCBuff))
{
/* Disable the USARTy Receive interrupt */
//USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
// mark buffer overflow
mygVars->status |= ERR_PKT_OF;
}
}
// read status again !
statusReg = (int8_t)(USART2->SR & (uint8_t)0xFF);
//read status
}
if
(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
{
USART_ClearFlag(USART2,USART_FLAG_RXNE);
}
}
