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/*
* Copyright © 2012 Keith Packard <keithp@keithp.com>
*
* This program 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.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* ao_spi.c
*/
#define ao_spi_get_mask(reg,mask,bus,speed) do { \
(reg) &= ~(mask); \
} while (0)
#define ao_spi_put_mask(reg,mask,bus) do { \
(reg) |= (mask); \
} while (0)
#define ao_spi_get_bit(reg,bit,pin,bus,speed) ao_spi_get_mask(reg,(1<<(bit)),bus,speed)
#define ao_spi_put_bit(reg,bit,pin,bus) ao_spi_put_mask(reg,(1<<(bit)),bus)
#define ao_gpio_token_paster(x,y) x ## y
#define ao_gpio_token_evaluator(x,y) ao_gpio_token_paster(x,y)
#define ao_gpio_set(port, bit, pin, v) do { \
if (v) \
PORTB |= (1 << bit); \
else \
PORTB &= ~(1 << bit); \
} while (0)
#define ao_gpio_get(port, bit, pin) ((PORTB >> (bit)) & 1)
/*
* The SPI mutex must be held to call either of these
* functions -- this mutex covers the entire SPI operation,
* from chip select low to chip select high
*/
#define ao_enable_output(port, bit, pin, v) do { \
ao_gpio_set(port, bit, pin, v); \
ao_gpio_token_evaluator(DDR,port) |= (1 << bit); \
} while (0)
void
ao_spi_send_bus(void __xdata *block, uint16_t len) __reentrant;
void
ao_spi_recv_bus(void __xdata *block, uint16_t len) __reentrant;
#define ao_spi_send(block, len, bus) ao_spi_send_bus(block, len)
#define ao_spi_recv(block, len, bus) ao_spi_recv_bus(block, len)
void
ao_spi_init(void);
#define ao_spi_get(bus, speed)
#define ao_spi_put(bus)
#define ao_spi_init_cs(port, mask) do { \
PORTB |= (mask); \
DDRB |= (mask); \
} while (0)
/* I2C */
void
ao_i2c_get(uint8_t i2c_index);
uint8_t
ao_i2c_start_bus(uint8_t address);
#define ao_i2c_start(i,a) ao_i2c_start_bus(a)
void
ao_i2c_put(uint8_t i2c_index);
uint8_t
ao_i2c_send_bus(void *block, uint16_t len, uint8_t stop);
#define ao_i2c_send(b,l,i,s) ao_i2c_send_bus(b,l.s)
uint8_t
ao_i2c_send_fixed_bus(uint8_t value, uint16_t len, uint8_t stop);
#define ao_i2c_send_fixed(v,l,i,s) ao_i2c_send_fixed_bus(v,l.s)
uint8_t
ao_i2c_recv_bus(void *block, uint16_t len, uint8_t stop);
#define ao_i2c_recv(b,l,i,s) ao_i2c_recv_bus(b,l.s)
void
ao_i2c_init(void);
/* notask.c */
uint8_t
ao_sleep(__xdata void *wchan);
void
ao_wakeup(__xdata void *wchan);
extern alt_t ao_max_height;
extern void ao_report_altitude(void);
void ao_delay_us(uint16_t us);
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