diff options
Diffstat (limited to 'software/mpu/src/uart/uart.c')
| -rw-r--r-- | software/mpu/src/uart/uart.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/software/mpu/src/uart/uart.c b/software/mpu/src/uart/uart.c deleted file mode 100644 index b07b3d3..0000000 --- a/software/mpu/src/uart/uart.c +++ /dev/null @@ -1,189 +0,0 @@ -/*****************************************************************************
- * uart.c: UART API file for NXP LPC13xx Family Microprocessors
- *
- * Copyright(C) 2008, NXP Semiconductor
- * All rights reserved.
- *
- * History
- * 2008.08.21 ver 1.00 Preliminary version, first Release
- *
-******************************************************************************/
-#include "LPC13xx.h"
-#include "uart.h"
-
-// CodeRed - change for CMSIS 1.3
-#define SystemFrequency SystemCoreClock
-
-volatile uint32_t UARTStatus;
-volatile uint8_t UARTTxEmpty = 1;
-volatile uint8_t UARTBuffer[BUFSIZE];
-volatile uint32_t UARTCount = 0;
-
-/*****************************************************************************
-** Function name: UART_IRQHandler
-**
-** Descriptions: UART interrupt handler
-**
-** parameters: None
-** Returned value: None
-**
-*****************************************************************************/
-void UART_IRQHandler(void)
-{
- uint8_t IIRValue, LSRValue;
- uint8_t Dummy = Dummy;
-
- IIRValue = LPC_UART->IIR;
-
- IIRValue >>= 1; /* skip pending bit in IIR */
- IIRValue &= 0x07; /* check bit 1~3, interrupt identification */
- if (IIRValue == IIR_RLS) /* Receive Line Status */
- {
- LSRValue = LPC_UART->LSR;
- /* Receive Line Status */
- if (LSRValue & (LSR_OE | LSR_PE | LSR_FE | LSR_RXFE | LSR_BI))
- {
- /* There are errors or break interrupt */
- /* Read LSR will clear the interrupt */
- UARTStatus = LSRValue;
- Dummy = LPC_UART->RBR; /* Dummy read on RX to clear
- interrupt, then bail out */
- return;
- }
- if (LSRValue & LSR_RDR) /* Receive Data Ready */
- {
- /* If no error on RLS, normal ready, save into the data buffer. */
- /* Note: read RBR will clear the interrupt */
- UARTBuffer[UARTCount++] = LPC_UART->RBR;
- if (UARTCount == BUFSIZE)
- {
- UARTCount = 0; /* buffer overflow */
- }
- }
- }
- else if (IIRValue == IIR_RDA) /* Receive Data Available */
- {
- /* Receive Data Available */
- UARTBuffer[UARTCount++] = LPC_UART->RBR;
- if (UARTCount == BUFSIZE)
- {
- UARTCount = 0; /* buffer overflow */
- }
- }
- else if (IIRValue == IIR_CTI) /* Character timeout indicator */
- {
- /* Character Time-out indicator */
- UARTStatus |= 0x100; /* Bit 9 as the CTI error */
- }
- else if (IIRValue == IIR_THRE) /* THRE, transmit holding register empty */
- {
- /* THRE interrupt */
- LSRValue = LPC_UART->LSR; /* Check status in the LSR to see if
- valid data in U0THR or not */
- if (LSRValue & LSR_THRE)
- {
- UARTTxEmpty = 1;
- }
- else
- {
- UARTTxEmpty = 0;
- }
- }
- return;
-}
-
-
-
-/*****************************************************************************
-** Function name: UARTInit
-**
-** Descriptions: Initialize UART0 port, setup pin select,
-** clock, parity, stop bits, FIFO, etc.
-**
-** parameters: UART baudrate
-** Returned value: None
-**
-*****************************************************************************/
-void UARTInit(uint32_t baudrate)
-{
- uint32_t Fdiv;
- uint32_t regVal;
-
- UARTTxEmpty = 1;
- UARTCount = 0;
-
- NVIC_DisableIRQ(UART_IRQn);
-
- LPC_IOCON->PIO1_6 &= ~0x07; /* UART I/O config */
- LPC_IOCON->PIO1_6 |= 0x01; /* UART RXD */
- LPC_IOCON->PIO1_7 &= ~0x07;
- LPC_IOCON->PIO1_7 |= 0x01; /* UART TXD */
- /* Enable UART clock */
- LPC_SYSCON->SYSAHBCLKCTRL |= (1<<12);
- LPC_SYSCON->UARTCLKDIV = 0x1; /* divided by 1 */
-
- LPC_UART->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
- regVal = LPC_SYSCON->UARTCLKDIV;
- Fdiv = (((SystemFrequency/LPC_SYSCON->SYSAHBCLKDIV)/regVal)/16)/baudrate ; /*baud rate */
-
- LPC_UART->DLM = Fdiv / 256;
- LPC_UART->DLL = Fdiv % 256;
- LPC_UART->LCR = 0x03; /* DLAB = 0 */
- LPC_UART->FCR = 0x07; /* Enable and reset TX and RX FIFO. */
-
- /* Read to clear the line status. */
- regVal = LPC_UART->LSR;
-
- /* Ensure a clean start, no data in either TX or RX FIFO. */
-// CodeRed - added parentheses around comparison in operand of &
- while (( LPC_UART->LSR & (LSR_THRE|LSR_TEMT)) != (LSR_THRE|LSR_TEMT) );
- while ( LPC_UART->LSR & LSR_RDR )
- {
- regVal = LPC_UART->RBR; /* Dump data from RX FIFO */
- }
-
- /* Enable the UART Interrupt */
- NVIC_EnableIRQ(UART_IRQn);
-
-#if TX_INTERRUPT
- LPC_UART->IER = IER_RBR | IER_THRE | IER_RLS; /* Enable UART interrupt */
-#else
- LPC_UART->IER = IER_RBR | IER_RLS; /* Enable UART interrupt */
-#endif
- return;
-}
-
-/*****************************************************************************
-** Function name: UARTSend
-**
-** Descriptions: Send a block of data to the UART 0 port based
-** on the data length
-**
-** parameters: buffer pointer, and data length
-** Returned value: None
-**
-*****************************************************************************/
-void UARTSend(uint8_t *BufferPtr, uint32_t Length)
-{
-
- while ( Length != 0 )
- {
- /* THRE status, contain valid data */
-#if !TX_INTERRUPT
- while ( !(LPC_UART->LSR & LSR_THRE) );
- LPC_UART->THR = *BufferPtr;
-#else
- /* Below flag is set inside the interrupt handler when THRE occurs. */
- while ( !(UARTTxEmpty & 0x01) );
- LPC_UART->THR = *BufferPtr;
- UARTTxEmpty = 0; /* not empty in the THR until it shifts out */
-#endif
- BufferPtr++;
- Length--;
- }
- return;
-}
-
-/******************************************************************************
-** End Of File
-******************************************************************************/
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