/* ao_spi_samd21.c */
+#define AO_SPI_INDEX_BIT 0
+#define AO_SPI_INDEX_MASK 0x07
+
+#define AO_SPI_CONFIG_BIT 4
+#define AO_SPI_CONFIG_MASK (3 << AO_SPI_CONFIG_BIT)
+
#define AO_SPI_CPOL_BIT 6
#define AO_SPI_CPHA_BIT 7
-#define AO_SPI_CONFIG_1 0x00
+#define AO_SPI_DOPO_BIT 8
+#define AO_SPI_DOPO_MOSI_0_SCLK_1 (0 << AO_SPI_DOPO_BIT)
+#define AO_SPI_DOPO_MOSI_2_SCLK_3 (1 << AO_SPI_DOPO_BIT)
+#define AO_SPI_DOPO_MOSI_3_SCLK_1 (2 << AO_SPI_DOPO_BIT)
+#define AO_SPI_DOPO_MOSI_0_SCLK_3 (3 << AO_SPI_DOPO_BIT)
+#define AO_SPI_DOPO_MASK (3 << AO_SPI_DOPO_BIT)
+
+#define AO_SPI_DIPO_BIT 10
+#define AO_SPI_DIPO_MISO_0 (0 << AO_SPI_DIPO_BIT)
+#define AO_SPI_DIPO_MISO_1 (1 << AO_SPI_DIPO_BIT)
+#define AO_SPI_DIPO_MISO_2 (2 << AO_SPI_DIPO_BIT)
+#define AO_SPI_DIPO_MISO_3 (3 << AO_SPI_DIPO_BIT)
+#define AO_SPI_DIPO_MASK (3 << AO_SPI_DIPO_MASK)
+
+#define AO_SPI_CONFIG_0 (0 << AO_SPI_CONFIG_BIT)
+#define AO_SPI_CONFIG_1 (1 << AO_SPI_CONFIG_BIT)
+#define AO_SPI_CONFIG_2 (2 << AO_SPI_CONFIG_BIT)
+#define AO_SPI_CONFIG_3 (3 << AO_SPI_CONFIG_BIT)
+
+#define AO_SPI_INDEX(id) ((uint8_t) ((id) & AO_SPI_INDEX_MASK))
+#define AO_SPI_CONFIG(id) ((id) & AO_SPI_CONFIG_MASK)
+#define AO_SPI_PIN_CONFIG(id) ((id) & (AO_SPI_INDEX_MASK | AO_SPI_CONFIG_MASK))
+#define AO_SPI_CPOL(id) ((uint32_t) (((id) >> AO_SPI_CPOL_BIT) & 1))
+#define AO_SPI_CPHA(id) ((uint32_t) (((id) >> AO_SPI_CPHA_BIT) & 1))
+#define AO_SPI_DOPO(id) ((uint32_t) (((id) >> AO_SPI_DOPO_BIT) & 3))
+#define AO_SPI_DIPO(id) ((uint32_t) (((id) >> AO_SPI_DIPO_BIT) & 3))
+
+#define AO_SPI_MAKE_MODE(pol,pha) (((pol) << AO_SPI_CPOL_BIT) | ((pha) << AO_SPI_CPHA_BIT))
+#define AO_SPI_MODE_0 AO_SPI_MAKE_MODE(0,0)
+#define AO_SPI_MODE_1 AO_SPI_MAKE_MODE(0,1)
+#define AO_SPI_MODE_2 AO_SPI_MAKE_MODE(1,0)
+#define AO_SPI_MODE_3 AO_SPI_MAKE_MODE(1,1)
+
+#if HAS_SPI_0
/*
* PA08 SERCOM0.0 -> MOSI (DOPO 0)
* PA09 SERCOM0.1 -> SCLK (DOPO 0)
* PA10 SERCOM0.2 -> MISO (DIPO 2)
*/
-#define AO_SPI_0_CONFIG_PA08_PA09_PA10 AO_SPI_CONFIG_1
-
-#define AO_SPI_CONFIG_2 0x08
+#define AO_SPI_0_PA08_PA09_PA10 (0 | AO_SPI_CONFIG_0 | \
+ AO_SPI_DOPO_MOSI_0_SCLK_1 | \
+ AO_SPI_DIPO_MISO_2)
/*
* PA04 SERCOM0.0 -> MOSI (DOPO 0)
* PA05 SERCOM0.1 -> SCLK (DOPO 0)
- * PA16 SERCOM0.2 -> MISO (DIPO 2)
+ * PA06 SERCOM0.2 -> MISO (DIPO 2)
*/
-#define AO_SPI_0_CONFIG_PA04_PA05_PA06 AO_SPI_CONFIG_2
+#define AO_SPI_0_PA04_PA05_PA06 (0 | AO_SPI_CONFIG_1 | \
+ AO_SPI_DOPO_MOSI_0_SCLK_1 | \
+ AO_SPI_DIPO_MISO_2)
+#endif /* HAS_SPI_0 */
-#define AO_SPI_CONFIG_NONE 0x0c
+#if HAS_SPI_3
+/*
+ * PA22 SERCOM3.0 -> MOSI (DOPO 0)
+ * PA23 SERCOM3.1 -> SCLK (DOPO 0)
+ * PA20 SERCOM3.2 -> MISO (DIPO 2)
+ */
+#define AO_SPI_3_PA22_PA23_PA20 (3 | AO_SPI_CONFIG_0 | \
+ AO_SPI_DOPO_MOSI_0_SCLK_1 | \
+ AO_SPI_DIPO_MISO_2)
+#endif /* HAS_SPI_3 */
-#define AO_SPI_INDEX_MASK 0x07
-#define AO_SPI_CONFIG_MASK 0x18
+#if HAS_SPI_4
+/*
+ * PA04 SERCOM0.0 -> MOSI (DOPO 0)
+ * PA05 SERCOM0.1 -> SCLK (DOPO 0)
+ * PA16 SERCOM0.2 -> MISO (DIPO 2)
+ */
+#define AO_SPI_CONFIG_PA04_PA05_PA06 (0 | AO_SPI_CONFIG_1 | \
+ AO_SPI_DOPO_MOSI_0_SCLK_1 | \
+ AO_SPI_DIPO_MISO_2)
-#define AO_SPI_INDEX(id) ((id) & AO_SPI_INDEX_MASK)
-#define AO_SPI_CONFIG(id) ((id) & AO_SPI_CONFIG_MASK)
-#define AO_SPI_PIN_CONFIG(id) ((id) & (AO_SPI_INDEX_MASK | AO_SPI_CONFIG_MASK))
-#define AO_SPI_CPOL(id) ((uint32_t) (((id) >> AO_SPI_CPOL_BIT) & 1))
-#define AO_SPI_CPHA(id) ((uint32_t) (((id) >> AO_SPI_CPHA_BIT) & 1))
+/*
+ * PB10 SERCOM4.2 -> MOSI (DOPO 1)
+ * PB11 SERCOM4.3 -> SCLK (DOPO 1)
+ * PA12 SERCOM4.0 -> MISO (DIPO 0)
+ */
+#define AO_SPI_4_PB10_PB11_PA12 (4 | AO_SPI_CONFIG_0 | \
+ AO_SPI_DOPO_MOSI_2_SCLK_3 | \
+ AO_SPI_DIPO_MISO_0)
+#endif /* HAS_SPI_4 */
+#if HAS_SPI_5
/*
- * We're not going to do any fancy SPI pin remapping, just use the first
- * three PAD pins, which means:
- *
- * MOSI: PAD.0
- * SCK: PAD.1
- * MISO: PAD.2
+ * PB22 SERCOM5.2 -> MOSI (DOPO 1)
+ * PB23 SERCOM5.3 -> SCLK (DOPO 1)
+ * PB03 SERCOM5.1 -> MISO (DIPO 1)
*/
+#define AO_SPI_5_PB22_PB23_PB03 (5 | AO_SPI_CONFIG_0 | \
+ AO_SPI_DOPO_MOSI_2_SCLK_3 | \
+ AO_SPI_DIPO_MISO_1)
+#endif /* HAS_SPI_5 */
-#define AO_SPI_0_PA08_PA09_PA10 (0 | AO_SPI_0_CONFIG_PA08_PA09_PA10)
-#define AO_SPI_0_PA04_PA05_PA06 (0 | AO_SPI_0_CONFIG_PA04_PA05_PA06)
+void
+ao_spi_send(const void *block, uint16_t len, uint16_t spi_index);
void
-ao_spi_send(const void *block, uint16_t len, uint8_t spi_index);
+ao_spi_send_fixed(uint8_t data, uint16_t len, uint16_t spi_index);
void
-ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
+ao_spi_recv(void *block, uint16_t len, uint16_t spi_index);
void
-ao_spi_duplex(const void *out, void *in, uint16_t len, uint8_t spi_index);
+ao_spi_duplex(const void *out, void *in, uint16_t len, uint16_t spi_index);
void
-ao_spi_get(uint8_t spi_index, uint32_t speed);
+ao_spi_get(uint16_t spi_index, uint32_t speed);
void
-ao_spi_put(uint8_t spi_index);
+ao_spi_put(uint16_t spi_index);
void
ao_spi_init(void);
-#define ao_spi_get_mask(reg,mask,bus, speed) do { \
- ao_spi_get(bus, speed); \
+#define ao_spi_set_cs(reg,mask) do { \
+ reg->outclr = mask; \
+ } while(0)
+
+#define ao_spi_clr_cs(reg,mask) do { \
+ reg->outset = mask; \
+ } while(0)
+
+#define ao_spi_get_mask(reg,mask,spi_index, speed) do { \
+ ao_spi_get(spi_index, speed); \
ao_spi_set_cs(reg,mask); \
} while (0)
-#define ao_spi_put_mask(reg,mask,bus) do { \
+#define ao_spi_put_mask(reg,mask,spi_index) do { \
ao_spi_clr_cs(reg,mask); \
- ao_spi_put(bus); \
+ ao_spi_put(spi_index); \
} while (0)
static inline void
-ao_spi_get_bit(struct samd21_port *port, uint8_t bit, uint8_t bus, uint32_t speed)
+ao_spi_get_bit(struct samd21_port *port, uint8_t bit, uint16_t spi_index, uint32_t speed)
{
- ao_spi_get(bus, speed);
+ ao_spi_get(spi_index, speed);
ao_gpio_set(port, bit, 0);
}
static inline void
-ao_spi_put_bit(struct samd21_port *port, uint8_t bit, uint8_t bus)
+ao_spi_put_bit(struct samd21_port *port, uint8_t bit, uint16_t spi_index)
{
ao_gpio_set(port, bit, 1);
- ao_spi_put(bus);
+ ao_spi_put(spi_index);
}
static inline uint8_t
-ao_spi_speed(uint32_t hz)
+ao_spi_speed(int index, uint32_t hz)
{
int32_t baud = (int32_t) (AO_SYSCLK / (2 * hz)) - 1;
- if (baud < 0)
- baud = 0;
+ (void) index;
+ if (baud < 1)
+ baud = 1;
if (baud > 255)
baud = 255;
return (uint8_t) baud;
projects / fw / altos / blobdiff