Working with STM32L151 chip and trying to get comm port flow control working. I am sure that it somehting that I am not setting up correctly.
Below is how I have configured the USART and GPIO lines:
void UsartStm32L_Setup ( uint8_t channelNum, uint32_t baudRate )
{
USART_InitTypeDef USART_InitStructure;
USART_CHAN_DEF * usartChanCntrl = (USART_CHAN_DEF *) & UsartChannelCntrl [ channelNum ];
UsartStm32L_ConfigRCC ( channelNum );
UsartStm32L_ConfigIOPins ( channelNum );
// Baud rate
USART_InitStructure.USART_BaudRate = baudRate; // Faster part (new)
// Data bits = 8
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
// Stop bits = 1
USART_InitStructure.USART_StopBits = USART_StopBits_1;
// Parity = None
USART_InitStructure.USART_Parity = USART_Parity_No;
if ( channelNum == USART_CHANNEL_2 ) // hjvtest hjv test
{ // hjvtest hjv test
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS_CTS; // hjvtest hjv test
} // hjvtest hjv test
else // hjvtest hjv test
{ // hjvtest hjv test
// HW Flow Control = None
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
} // hjvtest hjv test
// RX + TX
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
// Set USART parms:
USART_Init ( usartChanCntrl->chanName, & USART_InitStructure );
UsartStm32L_NVIC_Init ( channelNum );
// Enable Receive interrupt:
USART_ITConfig ( usartChanCntrl->chanName, USART_IT_RXNE, ENABLE );
USART_ClearITPendingBit ( usartChanCntrl->chanName, USART_IT_RXNE );
// Note: TXE IRQ will be enabled later in runtime code as needed...
// Enable USART (make active now)
USART_Cmd ( usartChanCntrl->chanName, ENABLE );
}
/*******************************************************************************
void CommPort_SetupCtsRtsLine ( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
// Enable GPIO Periph bus clock.
RCC_AHBPeriphClockCmd ( RCC_AHBPeriph_GPIOA, ENABLE );
/* Configure USART2 RTS and USART2 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = COMM_PORT_RTS_PIN_NAME | USART2_TXD_PIN_NAME;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init(USART2_PORT_NAME, &GPIO_InitStructure);
/* Configure USART2 CTS and USART2 Rx as input floating */
GPIO_InitStructure.GPIO_Pin = COMM_PORT_CTS_PIN_NAME | USART2_RXD_PIN_NAME;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_Init(USART2_PORT_NAME, &GPIO_InitStructure);
}
/************************************************************************/
I hope that someone can tell me what I am doing wrong or what more that I need to do?
