Refactor to use new protocol module and sipo.

[bertos.git] / drv / tc520.c

diff --git a/drv/tc520.c b/drv/tc520.c
deleted file mode 100644 (file)
index 3b61ad5..0000000
--- a/drv/tc520.c
+++ /dev/null
@@ -1,156 +0,0 @@
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction.  Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License.  This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
- * -->
- *
- * \version $Id$
- *
- * \brief TC520 ADC driver (implementation)
- *
- * \version $Id$
- * \author Francesco Sacchi <batt@develer.com>
- * \author Marco Benelli <marco@develer.com>
- */
-
-#include <drv/tc520.h>
-#include <drv/timer.h>
-
-#include <hw_tc520.h>
-
-#include <cfg/macros.h>
-#include <cfg/compiler.h>
-
-#include <drv/ser.h>
-
-static Serial *spi_ser;
-
-#define TC520_CONVERSION_TIMEOUT ms_to_ticks(1000)
-#define INIT_LOAD_VALUE 0x00
-
-/**
- * Start an AD conversion and return result.
- * To start a conversion first we must pull down CE pin.
- * The ADC starts a convertion and keeps the DV pin high until the end.
- * At this point, we can read the conversion value by SPI.
- * The convertion result is yield in 3 bytes.
- * First byte:
- * bit | Value
- * ----|-------
- *  7  | Overrange
- *  6  | Polarity
- * 5:0 | data bits 15:10
- *
- * Second byte: data 9:2
- *
- * Third byte:
- * bit | Value
- * ----|-------
- *  7  | data bit 1
- *  6  | data bit 0
- * 5:0 | '0'
- *
- * So, to get the result we must shift and recompose the bits.
- * \Note Ovverrange bit is handled as the 17th data bit.
- */
-tc520_data_t tc520_read(void)
-{
-       /* Start convertion and wait */
-       CE_LOW();
-       ticks_t start = timer_clock();
-       do
-       {
-               /* timeout check */
-               if (timer_clock() - start >= TC520_CONVERSION_TIMEOUT)
-               {
-                       ASSERT(0);
-                       CE_HIGH();
-                       return TC520_MAX_VALUE;
-               }
-       }
-       while(DV_LOW());
-
-       start = timer_clock();
-       do
-       {
-               /* timeout check */
-               if (timer_clock() - start >= TC520_CONVERSION_TIMEOUT)
-               {
-                       ASSERT(0);
-                       CE_HIGH();
-                       return TC520_MAX_VALUE;
-               }
-       }
-       while(DV_HIGH());
-
-       /* Ok, convertion finished, read result */
-       CE_HIGH();
-       READ_LOW();
-
-       /* RX buffer could be dirty...*/
-       ser_purge(spi_ser);
-
-       /* I/O buffer */
-       uint8_t buf[3] = "\x0\x0\x0";
-
-       /* Dummy write to activate recv */
-       ser_write(spi_ser, buf, sizeof(buf));
-       ser_drain(spi_ser);
-       READ_HIGH();
-
-       /* recv */
-       ASSERT(ser_read(spi_ser, buf, sizeof(buf)) == sizeof(buf));
-
-       tc520_data_t res;
-
-       /* Recompose data */
-       res = (((tc520_data_t)(buf[0] & 0x3F)) << 10) | (((tc520_data_t)buf[1]) << 2) | (((tc520_data_t)buf[2]) >> 6);
-
-       #define OVERRANGE_BIT BV(7)
-       /* Handle overrange bit as 17th bit */
-       if (buf[0] & OVERRANGE_BIT)
-               res |= BV32(16);
-
-       return res;
-}
-
-
-/**
- * Initialize tc520 A/D converter driver
- */
-void tc520_init(Serial *spi_port)
-{
-       spi_ser = spi_port;
-       /* init io ports */
-       TC520_HW_INIT;
-       /* Send initial load value */
-       LOAD_LOW();
-       ser_putchar(INIT_LOAD_VALUE, spi_ser);
-       ser_drain(spi_ser);
-       LOAD_HIGH();
-}