*
* 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; version 2 of the License.
+ * 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
* ao_spi.c
*/
-extern __xdata uint8_t ao_spi_mutex;
+extern uint8_t ao_spi_mutex;
-#define ao_spi_get_mask(reg,mask,bus) do { \
+#define ao_spi_get_mask(reg,mask,bus,speed) do { \
ao_mutex_get(&ao_spi_mutex); \
(reg) &= ~(mask); \
} while (0)
ao_mutex_put(&ao_spi_mutex); \
} while (0)
-#define ao_spi_get_bit(bit) do { \
+#define ao_spi_get_bit(reg,bit,bus,speed) do { \
ao_mutex_get(&ao_spi_mutex); \
- (bit) = 0; \
+ (pin) = 0; \
} while (0)
-#define ao_spi_put_bit(bit) do { \
- (bit) = 1; \
+#define ao_spi_put_bit(reg,bit,bus) do { \
+ (pin) = 1; \
ao_mutex_put(&ao_spi_mutex); \
} while (0)
+
+#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, v) do { \
+ if (v) \
+ (ao_gpio_token_evaluator(PORT,port)) |= (1 << bit); \
+ else \
+ (ao_gpio_token_evaluator(PORT,port)) &= ~(1 << bit); \
+ } while (0)
+
/*
* 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, v) do { \
+ ao_gpio_set(port, bit, v); \
+ ao_gpio_token_evaluator(DDR,port) |= (1 << bit); \
+ } while (0)
+
+
void
-ao_spi_send_bus(void __xdata *block, uint16_t len) __reentrant;
+ao_spi_send_bus(void *block, uint16_t len);
void
-ao_spi_recv_bus(void __xdata *block, uint16_t len) __reentrant;
+ao_spi_recv_bus(void *block, uint16_t len);
#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)