From 044ad7c3987460ede48ff27afd6bdb0ca05a0432 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 4 Jul 2011 20:52:54 +0200 Subject: import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v15011 it's sad to see that atmel doesn't publish their svn repo or has a centralized location or even puts proper version/release info into the library itself --- peripherals/dbgu/dbgu.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++ peripherals/dbgu/dbgu.dir | 37 +++++++++++++++ peripherals/dbgu/dbgu.h | 79 ++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+) create mode 100644 peripherals/dbgu/dbgu.c create mode 100644 peripherals/dbgu/dbgu.dir create mode 100644 peripherals/dbgu/dbgu.h (limited to 'peripherals/dbgu') diff --git a/peripherals/dbgu/dbgu.c b/peripherals/dbgu/dbgu.c new file mode 100644 index 0000000..0b3b380 --- /dev/null +++ b/peripherals/dbgu/dbgu.c @@ -0,0 +1,114 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ + +#include "dbgu.h" +#include + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ +//------------------------------------------------------------------------------ +/// Initializes the DBGU with the given parameters, and enables both the +/// transmitter and the receiver. The mode parameter contains the value of the +/// DBGU_MR register. +/// Value DBGU_STANDARD can be used for mode to get the most common configuration +/// (i.e. aysnchronous, 8bits, no parity, 1 stop bit, no flow control). +/// \param mode Operating mode to configure. +/// \param baudrate Desired baudrate (e.g. 115200). +/// \param mck Frequency of the system master clock in Hz. +//------------------------------------------------------------------------------ +void DBGU_Configure( + unsigned int mode, + unsigned int baudrate, + unsigned int mck) +{ + #if defined(cortexm3) + // Enable clock for UART + AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_DBGU); + #endif + + // Reset & disable receiver and transmitter, disable interrupts + AT91C_BASE_DBGU->DBGU_CR = AT91C_US_RSTRX | AT91C_US_RSTTX; + AT91C_BASE_DBGU->DBGU_IDR = 0xFFFFFFFF; + + // Configure baud rate + AT91C_BASE_DBGU->DBGU_BRGR = mck / (baudrate * 16); + + // Configure mode register + AT91C_BASE_DBGU->DBGU_MR = mode; + + // Disable DMA channel + AT91C_BASE_DBGU->DBGU_PTCR = AT91C_PDC_RXTDIS | AT91C_PDC_TXTDIS; + + // Enable receiver and transmitter + AT91C_BASE_DBGU->DBGU_CR = AT91C_US_RXEN | AT91C_US_TXEN; +} + +//------------------------------------------------------------------------------ +/// Outputs a character on the DBGU line. +/// \note This function is synchronous (i.e. uses polling). +/// \param c Character to send. +//------------------------------------------------------------------------------ +void DBGU_PutChar(unsigned char c) +{ + // Wait for the transmitter to be ready + while ((AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_TXEMPTY) == 0); + + // Send character + AT91C_BASE_DBGU->DBGU_THR = c; + + // Wait for the transfer to complete + while ((AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_TXEMPTY) == 0); +} + +//------------------------------------------------------------------------------ +/// Return 1 if a character can be read in DBGU +//------------------------------------------------------------------------------ +unsigned int DBGU_IsRxReady() +{ + return (AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_RXRDY); +} + +//------------------------------------------------------------------------------ +/// Reads and returns a character from the DBGU. +/// \note This function is synchronous (i.e. uses polling). +/// \return Character received. +//------------------------------------------------------------------------------ +unsigned char DBGU_GetChar(void) +{ + while ((AT91C_BASE_DBGU->DBGU_CSR & AT91C_US_RXRDY) == 0); + return AT91C_BASE_DBGU->DBGU_RHR; +} + + + diff --git a/peripherals/dbgu/dbgu.dir b/peripherals/dbgu/dbgu.dir new file mode 100644 index 0000000..ec31900 --- /dev/null +++ b/peripherals/dbgu/dbgu.dir @@ -0,0 +1,37 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +/// \dir +/// +/// !!!Purpose +/// +/// Contains the peripheral API for the Debug Unit (DBGU). +//------------------------------------------------------------------------------ + diff --git a/peripherals/dbgu/dbgu.h b/peripherals/dbgu/dbgu.h new file mode 100644 index 0000000..816f11d --- /dev/null +++ b/peripherals/dbgu/dbgu.h @@ -0,0 +1,79 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +/// \unit +/// +/// !Purpose +/// +/// This module provides definitions and functions for using the Debug Unit +/// (DBGU). +/// +/// It also overloads the fputc(), fputs() & putchar() functions so the printf() +/// method outputs its data on the DBGU. This behavior can be suppressed by +/// defining NOFPUT during compilation. +/// +/// !Usage +/// +/// -# Enable the DBGU pins (see pio & board.h). +/// -# Configure the DBGU using DBGU_Configure with the desired operating mode. +/// -# Send characters using DBGU_PutChar() or the printf() method. +/// -# Receive characters using DBGU_GetChar(). +/// +/// \note Unless specified, all the functions defined here operate synchronously; +/// i.e. they all wait the data is sent/received before returning. +//------------------------------------------------------------------------------ + +#ifndef DBGU_H +#define DBGU_H + +//------------------------------------------------------------------------------ +// Definitions +//------------------------------------------------------------------------------ + +/// Standard operating mode (asynchronous, 8bit, no parity, 1 stop bit) +#define DBGU_STANDARD AT91C_US_PAR_NONE + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +extern void DBGU_Configure( + unsigned int mode, + unsigned int baudrate, + unsigned int mck); + +extern unsigned char DBGU_GetChar(void); + +extern void DBGU_PutChar(unsigned char c); + +extern unsigned int DBGU_IsRxReady(void); + +#endif //#ifndef DBGU_H + -- cgit v1.2.3