diff options
| author | Yuval Adam <yuval@y3xz.com> | 2015-03-13 12:24:52 +0200 |
|---|---|---|
| committer | Yuval Adam <yuval@y3xz.com> | 2015-03-13 12:24:52 +0200 |
| commit | 4085ae3ddfbbf10c8ccbd3dccd43452c40a1fe40 (patch) | |
| tree | ac63581949a49511136e7e9e47d265bfb4119b26 /boot_loader/bl_i2c.c | |
| parent | 788db64b8642bf31de6930d18a62177c64163ee0 (diff) | |
Add bootloader, nfclib and sensorlib
Diffstat (limited to 'boot_loader/bl_i2c.c')
| -rw-r--r-- | boot_loader/bl_i2c.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/boot_loader/bl_i2c.c b/boot_loader/bl_i2c.c new file mode 100644 index 0000000..bc2b62c --- /dev/null +++ b/boot_loader/bl_i2c.c @@ -0,0 +1,149 @@ +//*****************************************************************************
+//
+// bl_i2c.c - This file contains the function used to transfer data via the I2C
+// 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 <stdint.h>
+#include "inc/hw_gpio.h"
+#include "inc/hw_i2c.h"
+#include "inc/hw_memmap.h"
+#include "inc/hw_sysctl.h"
+#include "inc/hw_types.h"
+#include "bl_config.h"
+#include "boot_loader/bl_i2c.h"
+
+//*****************************************************************************
+//
+//! \addtogroup bl_i2c_api
+//! @{
+//
+//*****************************************************************************
+#if defined(I2C_ENABLE_UPDATE) || defined(DOXYGEN)
+
+//*****************************************************************************
+//
+//! Sends data over the I2C port.
+//!
+//! \param pui8Data is the buffer containing the data to write out to the I2C
+//! port.
+//! \param ui32Size is the number of bytes provided in \e pui8Data buffer that
+//! will be written out to the I2C port.
+//!
+//! This function sends \e ui32Size bytes of data from the buffer pointed to by
+//! \e pui8Data via the I2C port. The function will wait till the I2C Slave
+//! port has been properly addressed by the I2C Master device before sending
+//! the first byte.
+//!
+//! \return None.
+//
+//*****************************************************************************
+void
+I2CSend(const uint8_t *pui8Data, uint32_t ui32Size)
+{
+ //
+ // Transmit the number of bytes requested on the UART port.
+ //
+ while(ui32Size--)
+ {
+ //
+ // Wait for request to come in at slave.
+ //
+ while(!(HWREG(I2C0_BASE + I2C_O_SCSR) & I2C_SCSR_TREQ))
+ {
+ }
+
+ //
+ // Send out the next byte.
+ //
+ HWREG(I2C0_BASE + I2C_O_SDR) = *pui8Data++;
+ }
+}
+
+//*****************************************************************************
+//
+//! Waits until all data has been transmitted by the I2C port.
+//!
+//! This function waits until all data written to the I2C port has been read by
+//! the master.
+//!
+//! \return None.
+//
+//*****************************************************************************
+void
+I2CFlush(void)
+{
+ //
+ // Wait until the I2C bus is no longer busy, meaning that the last byte has
+ // been sent.
+ //
+ while(HWREG(I2C0_BASE + I2C_O_MCS) & I2C_MCS_BUSBSY)
+ {
+ }
+}
+
+//*****************************************************************************
+//
+//! Receives data over the I2C port.
+//!
+//! \param pui8Data is the buffer to read data into from the I2C port.
+//! \param ui32Size is the number of bytes provided in the \e pui8Data buffer
+//! that should be written with data from the I2C port.
+//!
+//! This function reads back \e ui32Size bytes of data from the I2C 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. This function
+//! will wait till the I2C Slave port has been properly addressed by the I2C
+//! Master before reading the first byte of data from the I2C port.
+//!
+//! \return None.
+//
+//*****************************************************************************
+void
+I2CReceive(uint8_t *pui8Data, uint32_t ui32Size)
+{
+ //
+ // Send out the number of bytes requested.
+ //
+ while(ui32Size--)
+ {
+ //
+ // Wait until the slave has received the character.
+ //
+ while(!(HWREG(I2C0_BASE + I2C_O_SCSR) & I2C_SCSR_RREQ))
+ {
+ }
+
+ //
+ // Receive a byte from the I2C.
+ //
+ *pui8Data++ = HWREG(I2C0_BASE + I2C_O_SDR);
+ }
+}
+
+//*****************************************************************************
+//
+// Close the Doxygen group.
+//! @}
+//
+//*****************************************************************************
+#endif
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