-/*
- * ao_spi.c
- */
-
-extern __xdata uint8_t ao_spi_mutex;
-
-#define ao_spi_get_mask(reg,mask) do {\
- ao_mutex_get(&ao_spi_mutex); \
- (reg) &= ~(mask); \
- } while (0)
-
-#define ao_spi_put_mask(reg,mask) do { \
- (reg) |= (mask); \
- ao_mutex_put(&ao_spi_mutex); \
- } while (0)
-
-#define ao_spi_get_bit(bit) do {\
- ao_mutex_get(&ao_spi_mutex); \
- (bit) = 0; \
- } while (0)
-
-#define ao_spi_put_bit(bit) do { \
- (bit) = 1; \
- ao_mutex_put(&ao_spi_mutex); \
- } 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
- */
-
-void
-ao_spi_send(void __xdata *block, uint16_t len) __reentrant;
-
-void
-ao_spi_recv(void __xdata *block, uint16_t len) __reentrant;
-
-void
-ao_spi_init(void);
-