From 4085ae3ddfbbf10c8ccbd3dccd43452c40a1fe40 Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Fri, 13 Mar 2015 12:24:52 +0200 Subject: Add bootloader, nfclib and sensorlib --- boot_loader/bl_uart.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 156 insertions(+) create mode 100644 boot_loader/bl_uart.c (limited to 'boot_loader/bl_uart.c') diff --git a/boot_loader/bl_uart.c b/boot_loader/bl_uart.c new file mode 100644 index 0000000..71df5c3 --- /dev/null +++ b/boot_loader/bl_uart.c @@ -0,0 +1,156 @@ +//***************************************************************************** +// +// bl_uart.c - Functions to transfer data via the UART port. +// +// Copyright (c) 2006-2014 Texas Instruments Incorporated. All rights reserved. +// Software License Agreement +// +// Texas Instruments (TI) is supplying this software for use solely and +// exclusively on TI's microcontroller products. The software is owned by +// TI and/or its suppliers, and is protected under applicable copyright +// laws. You may not combine this software with "viral" open-source +// software in order to form a larger program. +// +// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. +// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT +// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY +// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL +// DAMAGES, FOR ANY REASON WHATSOEVER. +// +// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package. +// +//***************************************************************************** + +#include +#include "inc/hw_gpio.h" +#include "inc/hw_memmap.h" +#include "inc/hw_sysctl.h" +#include "inc/hw_types.h" +#include "inc/hw_uart.h" +#include "bl_config.h" +#include "boot_loader/bl_uart.h" + +//***************************************************************************** +// +//! \addtogroup bl_uart_api +//! @{ +// +//***************************************************************************** +#if defined(UART_ENABLE_UPDATE) || defined(DOXYGEN) + +//***************************************************************************** +// +//! Sends data over the UART port. +//! +//! \param pui8Data is the buffer containing the data to write out to the UART +//! port. +//! \param ui32Size is the number of bytes provided in \e pui8Data buffer that +//! will be written out to the UART port. +//! +//! This function sends \e ui32Size bytes of data from the buffer pointed to by +//! \e pui8Data via the UART port. +//! +//! \return None. +// +//***************************************************************************** +void +UARTSend(const uint8_t *pui8Data, uint32_t ui32Size) +{ + // + // Transmit the number of bytes requested on the UART port. + // + while(ui32Size--) + { + // + // Make sure that the transmit FIFO is not full. + // + while((HWREG(UART0_BASE + UART_O_FR) & UART_FR_TXFF)) + { + } + + // + // Send out the next byte. + // + HWREG(UART0_BASE + UART_O_DR) = *pui8Data++; + } + + // + // Wait until the UART is done transmitting. + // + UARTFlush(); +} + +//***************************************************************************** +// +//! Waits until all data has been transmitted by the UART port. +//! +//! This function waits until all data written to the UART port has been +//! transmitted. +//! +//! \return None. +// +//***************************************************************************** +void +UARTFlush(void) +{ + // + // Wait for the UART FIFO to empty and then wait for the shifter to get the + // bytes out the port. + // + while(!(HWREG(UART0_BASE + UART_O_FR) & UART_FR_TXFE)) + { + } + + // + // Wait for the FIFO to not be busy so that the shifter completes. + // + while((HWREG(UART0_BASE + UART_O_FR) & UART_FR_BUSY)) + { + } +} + +//***************************************************************************** +// +//! Receives data over the UART port. +//! +//! \param pui8Data is the buffer to read data into from the UART port. +//! \param ui32Size is the number of bytes provided in the \e pui8Data buffer +//! that should be written with data from the UART port. +//! +//! This function reads back \e ui32Size bytes of data from the UART port, into +//! the buffer that is pointed to by \e pui8Data. This function will not +//! return until \e ui32Size number of bytes have been received. +//! +//! \return None. +// +//***************************************************************************** +void +UARTReceive(uint8_t *pui8Data, uint32_t ui32Size) +{ + // + // Send out the number of bytes requested. + // + while(ui32Size--) + { + // + // Wait for the FIFO to not be empty. + // + while((HWREG(UART0_BASE + UART_O_FR) & UART_FR_RXFE)) + { + } + + // + // Receive a byte from the UART. + // + *pui8Data++ = HWREG(UART0_BASE + UART_O_DR); + } +} + +//***************************************************************************** +// +// Close the Doxygen group. +//! @} +// +//***************************************************************************** +#endif -- cgit v1.3.1