Prof Greg Egan
/
UAVXArm-GKE
UAVX Multicopter Flight Controller.
Diff: Methods/sb_uart0.cpp
- Revision:
- 0:62a1c91a859a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Methods/sb_uart0.cpp Fri Feb 18 22:28:05 2011 +0000 @@ -0,0 +1,63 @@ +/* + Copyright (c) 2010 Andy Kirkham + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +*/ + +#include "../SerialBuffered.h" +#include "../sb_globals.h" + +extern "C" void SerialBuffered_ISR(unsigned long, int); + +extern "C" static void SerialBuffered_ISR_0(void) __irq { SerialBuffered_ISR(LPC_UART0_BASE, 0); } + +void SerialBuffered::set_uart0(PinName tx, PinName rx) { + unsigned ier = 0; + + if (tx == NC && rx == NC) return; // Eh, why would one? + + LPC_SC->PCONP |= (1UL << 3); + LPC_SC->PCLKSEL0 &= ~(3UL << 6); + LPC_SC->PCLKSEL0 |= (1UL << 6); + + if (tx == USBTX) { + set_tx_buffer_size(SERIALBUFFERED_BUFFER_SIZE); + LPC_PINCON->PINSEL0 &= ~(1UL << 4); + LPC_PINCON->PINSEL0 |= (1UL << 4); + ier |= 1; + } + else { reset_uart_tx(0); } + + if (rx == USBRX) { + set_rx_buffer_size(SERIALBUFFERED_BUFFER_SIZE); + LPC_PINCON->PINSEL0 &= ~(1UL << 6); + LPC_PINCON->PINSEL0 |= (1UL << 6); + ier |= 2; + } + else { reset_uart_rx(0); } + + if (ier) { + baud(9600); + format(SerialBuffered::WordLength8, SerialBuffered::NoParity, SerialBuffered::StopBit1); + LPC_UART0->FCR = 0x7; + NVIC_SetVector(UART0_IRQn, (uint32_t)SerialBuffered_ISR_0); + NVIC_EnableIRQ(UART0_IRQn); + LPC_UART0->IER = ier; + } +}