void hal_uart_dma_init(void){
bytes_to_write = 0;
bytes_to_read = 0;
/* PPS Input Remapping */
PLIB_PORTS_RemapInput(PORTS_ID_0, INPUT_FUNC_U2RX, INPUT_PIN_RPF4 );
PLIB_PORTS_RemapInput(PORTS_ID_0, INPUT_FUNC_U2CTS, INPUT_PIN_RPB2 );
/* PPS Output Remapping */
PLIB_PORTS_RemapOutput(PORTS_ID_0, OUTPUT_FUNC_U2RTS, OUTPUT_PIN_RPG9 );
PLIB_PORTS_RemapOutput(PORTS_ID_0, OUTPUT_FUNC_U2TX, OUTPUT_PIN_RPF5 );
/* Initialize USART */
PLIB_USART_BaudRateSet(BT_USART_ID, SYS_CLK_PeripheralFrequencyGet(CLK_BUS_PERIPHERAL_1), BT_USART_BAUD);
PLIB_USART_HandshakeModeSelect(BT_USART_ID, USART_HANDSHAKE_MODE_FLOW_CONTROL);
PLIB_USART_OperationModeSelect(BT_USART_ID, USART_ENABLE_TX_RX_CTS_RTS_USED);
PLIB_USART_LineControlModeSelect(BT_USART_ID, USART_8N1);
PLIB_USART_TransmitterEnable(BT_USART_ID);
// PLIB_USART_TransmitterInterruptModeSelect(bluetooth_uart_id, USART_TRANSMIT_FIFO_IDLE);
PLIB_USART_ReceiverEnable(BT_USART_ID);
// PLIB_USART_ReceiverInterruptModeSelect(bluetooth_uart_id, USART_RECEIVE_FIFO_ONE_CHAR);
PLIB_USART_Enable(BT_USART_ID);
// enable _RESET
SYS_PORTS_PinDirectionSelect(PORTS_ID_0, SYS_PORTS_DIRECTION_OUTPUT, BT_RESET_PORT, BT_RESET_BIT);
bluetooth_power_cycle();
// After reset, CTS is high and we need to wait until CTS is low again
// HACK: CTS doesn't seem to work right now
msleep(250);
// HACK: CSR seems to do an auto-baud on the uart, which makes the first HCI RESET fail
// 2 options: a) check for CTS going high within 10 ms, b) just send HCI RESET twice
// const uint8_t hci_reset_cmd[] = {0x01, 0x03, 0x0c, 0x00};
// int pos = 0;
// while(pos < sizeof(hci_reset_cmd)){
// if (PLIB_USART_TransmitterIsEmpty(BT_USART_ID)){
// PLIB_USART_TransmitterByteSend(BT_USART_ID, hci_reset_cmd[pos]);
// pos++;
// }
// }
// msleep(250);
}
void DRV_USART0_Initialize(void)
{
/* Initialize USART */
PLIB_USART_BaudRateSet(USART_ID_1, SYS_CLK_PeripheralFrequencyGet(CLK_BUS_PERIPHERAL_1), 9600);
PLIB_USART_HandshakeModeSelect(USART_ID_1, USART_HANDSHAKE_MODE_FLOW_CONTROL);
PLIB_USART_OperationModeSelect(USART_ID_1, USART_ENABLE_TX_RX_USED);
PLIB_USART_LineControlModeSelect(USART_ID_1, USART_8N1);
PLIB_USART_ReceiverEnable(USART_ID_1);
PLIB_USART_ReceiverInterruptModeSelect(USART_ID_1, USART_RECEIVE_FIFO_ONE_CHAR);
/* Initialize interrupts */
PLIB_INT_SourceEnable(INT_ID_0, INT_SOURCE_USART_1_RECEIVE);
PLIB_INT_SourceEnable(INT_ID_0, INT_SOURCE_USART_1_ERROR);
PLIB_INT_VectorPrioritySet(INT_ID_0, INT_VECTOR_UART1, INT_PRIORITY_LEVEL1);
PLIB_INT_VectorSubPrioritySet(INT_ID_0, INT_VECTOR_UART1, INT_SUBPRIORITY_LEVEL0);
PLIB_USART_Enable(USART_ID_1);
}
void DRV_USART0_Initialize(void)
{
/* Initialize USART */
PLIB_USART_BaudRateSet(USART_ID_2, SYS_CLK_PeripheralFrequencyGet(CLK_BUS_PERIPHERAL_1), 230400);
PLIB_USART_HandshakeModeSelect(USART_ID_2, USART_HANDSHAKE_MODE_SIMPLEX);
PLIB_USART_OperationModeSelect(USART_ID_2, USART_ENABLE_TX_RX_USED);
PLIB_USART_LineControlModeSelect(USART_ID_2, USART_8N1);
PLIB_USART_TransmitterEnable(USART_ID_2);
PLIB_USART_TransmitterInterruptModeSelect(USART_ID_2, USART_TRANSMIT_FIFO_NOT_FULL);
/* Initialize interrupts */
/* Note: TX interrupt must be enabled when data is ready to be transmitted */
/* The following code can be used to enable TX Interrupt */
/* PLIB_INT_SourceEnable(INT_ID_0, INT_SOURCE_USART_2_TRANSMIT); */
PLIB_INT_SourceEnable(INT_ID_0, INT_SOURCE_USART_2_ERROR);
PLIB_INT_VectorPrioritySet(INT_ID_0, INT_VECTOR_UART2, INT_PRIORITY_LEVEL1);
PLIB_INT_VectorSubPrioritySet(INT_ID_0, INT_VECTOR_UART2, INT_SUBPRIORITY_LEVEL0);
PLIB_USART_Enable(USART_ID_2);
}
void _DRV_USART_HardwareSetup(USART_MODULE_ID plibID, DRV_USART_INIT * init)
{
bool addressedMode = false;
bool loopbackMode = false;
bool irdaMode = false;
bool wakeFromSleep = false;
bool stopInIdle = false;
bool autoBaud = false;
/* Default is to use UxTX and UxRX only */
USART_OPERATION_MODE handshakeLines = USART_ENABLE_TX_RX_USED;
/* Check the operational mode and udpate the relevant flags */
switch(init->mode)
{
case DRV_USART_OPERATION_MODE_ADDRESSED:
addressedMode = true;
break;
case DRV_USART_OPERATION_MODE_IRDA:
irdaMode = true;
handshakeLines = USART_ENABLE_TX_RX_BCLK_USED;
break;
case DRV_USART_OPERATION_MODE_LOOPBACK:
loopbackMode = true;
break;
default:
break;
}
/* Handshaking */
if(init->handshake != DRV_USART_HANDSHAKE_NONE)
{
/* Note that this mode is exclusive of DRV_USART_OPERATION_MODE_IRDA.
In that if the driver must be set up to use DRV_USART_OPERATION_MODE_IRDA
then handshake parameter of the init data structure must be
DRV_USART_HANDSHAKE_NONE. Setting up the driver to use Simplex or
flow control will over ride the requirements of the IRDA mode.*/
handshakeLines = USART_ENABLE_TX_RX_CTS_RTS_USED;
/* Set the handshake mode to either simplex or flow control */
PLIB_USART_HandshakeModeSelect(plibID, handshakeLines);
}
/* Wake up the part from sleep on any activity on the RX Line */
wakeFromSleep = (init->flags & DRV_USART_INIT_FLAG_WAKE_ON_START);
/* When the CPU enters IDLE mode, stop the USART */
stopInIdle = (init->flags & DRV_USART_INIT_FLAG_STOP_IN_IDLE);
/* When the CPU enters IDLE mode, stop the USART */
autoBaud = (init->flags & DRV_USART_INIT_FLAG_AUTO_BAUD);
/* Initialize the USART based on initialization data structure */
PLIB_USART_InitializeModeGeneral(plibID, autoBaud, loopbackMode,
wakeFromSleep, irdaMode, stopInIdle);
/* Set the line control mode */
PLIB_USART_LineControlModeSelect(plibID, init->lineControl);
/* We set the receive interrupt mode to receive an interrupt whenever FIFO
is not empty */
PLIB_USART_InitializeOperation(plibID, USART_RECEIVE_FIFO_ONE_CHAR,
USART_TRANSMIT_FIFO_EMPTY, handshakeLines);
/* Set the baud rate and enable the USART */
PLIB_USART_BaudSetAndEnable(plibID, init->brgClock, init->baud);
}