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 hal_uart_dma_init(void){ bluetooth_power_cycle(); }