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 100755 (executable)
index 16df615..0000000
--- a/drv/tc520.c
+++ /dev/null
@@ -1,132 +0,0 @@
-/**
- * \file
- * <!--
- * 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/cpu.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();
-}