#include "ao.h"
+/* Default pin usage for existing Altus Metrum devices */
+
+#ifndef SPI_CONST
+#define SPI_CONST 0xff
+#endif
+
+/*
+ * USART0 SPI config alt 1
+ *
+ * MO P0_3
+ * MI P0_2
+ * CLK P0_5
+ * SS P0_4
+ *
+ * USART0 SPI config alt 2
+ *
+ * MO P1_5
+ * MI P1_4
+ * CLK P1_3
+ * CSS P1_2
+ *
+ * USART1 SPI config alt 1
+ *
+ * MO P0_4
+ * MI P0_5
+ * CLK P0_3
+ * SS P0_2
+ *
+ * USART1 SPI config alt 2
+ *
+ * MO P1_6
+ * MI P1_7
+ * CLK P1_5
+ * SS P1_4
+ *
+ *
+ * Chip select is the responsibility of the caller in master mode
+ */
+
+#if HAS_SPI_0
+#define SPI_BUF_0 &U0DBUFXADDR
+#define SPI_CSR_0 U0CSR
+#define SPI_BAUD_0 U0BAUD
+#define SPI_GCR_0 U0GCR
+#define SPI_CFG_MASK_0 PERCFG_U0CFG_ALT_MASK
+#define SPI_DMA_TX_0 DMA_CFG0_TRIGGER_UTX0
+#define SPI_DMA_RX_0 DMA_CFG0_TRIGGER_URX0
+
+#if SPI_0_ALT_1
+#define SPI_CFG_0 PERCFG_U0CFG_ALT_1
+#define SPI_SEL_0 P0SEL
+#define SPI_BITS_0 (1 << 3) | (1 << 2) | (1 << 5)
+#define SPI_CSS_BIT_0 (1 << 4)
+#endif
+
+#if SPI_0_ALT_2
+#define SPI_CFG_0 PERCFG_U0CFG_ALT_2
+#define SPI_SEL_0 P1SEL
+#define SPI_PRI_0 P2SEL_PRI3P1_USART0
+#define SPI_BITS_0 (1 << 5) | (1 << 4) | (1 << 3)
+#define SPI_CSS_BIT_0 (1 << 2)
+#endif
+
+#endif
+
+#if HAS_SPI_1
+#define SPI_BUF_1 &U1DBUFXADDR
+#define SPI_CSR_1 U1CSR
+#define SPI_BAUD_1 U1BAUD
+#define SPI_GCR_1 U1GCR
+#define SPI_CFG_MASK_1 PERCFG_U1CFG_ALT_MASK
+#define SPI_DMA_TX_1 DMA_CFG0_TRIGGER_UTX1
+#define SPI_DMA_RX_1 DMA_CFG0_TRIGGER_URX1
+
+#if SPI_1_ALT_1
+#define SPI_CFG_1 PERCFG_U1CFG_ALT_1
+#define SPI_SEL_1 P0SEL
+#define SPI_BITS_1 (1 << 4) | (1 << 5) | (1 << 3)
+#define SPI_CSS_BIT_1 (1 << 2)
+#endif
+
+#if SPI_1_ALT_2
+#define SPI_CFG_1 PERCFG_U1CFG_ALT_2
+#define SPI_SEL_1 P1SEL
+#define SPI_PRI_1 P2SEL_PRI3P1_USART1
+#define SPI_BITS_1 (1 << 6) | (1 << 7) | (1 << 5)
+#define SPI_CSS_BIT_1 (1 << 4)
+#endif
+
+#endif
+
+#if MULTI_SPI
+
+#define SPI_BUF(bus) ((bus) ? SPI_BUF_1 : SPI_BUF_0)
+#define SPI_CSR(bus) ((bus) ? SPI_CSR_1 : SPI_CSR_0)
+#define SPI_BAUD(bus) ((bus) ? SPI_BAUD_1 : SPI_BAUD_0)
+#define SPI_GCR(bus) ((bus) ? SPI_GCR_1 : SPI_GCR_0)
+#define SPI_CFG_MASK(bus) ((bus) ? SPI_CFG_MASK_1 : SPI_CFG_MASK_0)
+#define SPI_DMA_TX(bus) ((bus) ? SPI_DMA_TX_1 : SPI_DMA_TX_0)
+#define SPI_DMA_RX(bus) ((bus) ? SPI_DMA_RX_1 : SPI_DMA_RX_0)
+#define SPI_CFG(bus) ((bus) ? SPI_CFG_1 : SPI_CFG_0)
+#define SPI_SEL(bus) ((bus) ? SPI_SEL_1 : SPI_SEL_0)
+#define SPI_BITS(bus) ((bus) ? SPI_BITS_1 : SPI_BITS_0)
+#define SPI_CSS_BIT(bus) ((bus) ? SPI_CSS_BIT_1 : SPI_CSS_BIT_0)
+
+#else
+
+#if HAS_SPI_0
+#define SPI_BUF(bus) SPI_BUF_0
+#define SPI_CSR(bus) SPI_CSR_0
+#define SPI_BAUD(bus) SPI_BAUD_0
+#define SPI_GCR(bus) SPI_GCR_0
+#define SPI_CFG_MASK(bus) SPI_CFG_MASK_0
+#define SPI_DMA_TX(bus) SPI_DMA_TX_0
+#define SPI_DMA_RX(bus) SPI_DMA_RX_0
+#define SPI_CFG(bus) SPI_CFG_0
+#define SPI_SEL(bus) SPI_SEL_0
+#define SPI_BITS(bus) SPI_BITS_0
+#define SPI_CSS_BIT(bus) SPI_CSS_BIT_0
+#endif
+#if HAS_SPI_1
+#define SPI_BUF(bus) SPI_BUF_1
+#define SPI_CSR(bus) SPI_CSR_1
+#define SPI_BAUD(bus) SPI_BAUD_1
+#define SPI_GCR(bus) SPI_GCR_1
+#define SPI_CFG_MASK(bus) SPI_CFG_MASK_1
+#define SPI_DMA_TX(bus) SPI_DMA_TX_1
+#define SPI_DMA_RX(bus) SPI_DMA_RX_1
+#define SPI_CFG(bus) SPI_CFG_1
+#define SPI_SEL(bus) SPI_SEL_1
+#define SPI_BITS(bus) SPI_BITS_1
+#define SPI_CSS_BIT(bus) SPI_CSS_BIT_1
+#endif
+
+#endif /* MULTI_SPI */
+
+#if AO_SPI_SLAVE
+#define CSS(bus) SPI_CSS_BIT(bus)
+#define UxCSR_DIRECTION UxCSR_SLAVE
+#else
+#define CSS(bus) 0
+#define UxCSR_DIRECTION UxCSR_MASTER
+#endif
+
/* Shared mutex to protect SPI bus, must cover the entire
* operation, from CS low to CS high. This means that any SPI
* user must protect the SPI bus with this mutex
*/
-__xdata uint8_t ao_spi_mutex;
-__xdata uint8_t ao_spi_dma_in_done;
-__xdata uint8_t ao_spi_dma_out_done;
+__xdata uint8_t ao_spi_mutex[N_SPI];
+__xdata uint8_t ao_spi_dma_in_done[N_SPI];
+__xdata uint8_t ao_spi_dma_out_done[N_SPI];
-uint8_t ao_spi_dma_out_id;
-uint8_t ao_spi_dma_in_id;
+uint8_t ao_spi_dma_out_id[N_SPI];
+uint8_t ao_spi_dma_in_id[N_SPI];
static __xdata uint8_t ao_spi_const;
+
/* Send bytes over SPI.
*
* This sets up two DMA engines, one writing the data and another reading
* is complete, as the transmit register is double buffered and hence signals
* completion one byte before the transfer is actually complete
*/
+#if MULTI_SPI
+void
+ao_spi_send(void __xdata *block, uint16_t len, uint8_t bus) __reentrant
+#else
void
ao_spi_send_bus(void __xdata *block, uint16_t len) __reentrant
+#define bus 0
+#endif
{
- ao_dma_set_transfer(ao_spi_dma_in_id,
- &U0DBUFXADDR,
+ ao_dma_set_transfer(ao_spi_dma_in_id[bus],
+ SPI_BUF(bus),
&ao_spi_const,
len,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
- DMA_CFG0_TRIGGER_URX0,
+ SPI_DMA_RX(bus),
DMA_CFG1_SRCINC_0 |
DMA_CFG1_DESTINC_0 |
DMA_CFG1_PRIORITY_NORMAL);
-
- ao_dma_set_transfer(ao_spi_dma_out_id,
+ ao_dma_set_transfer(ao_spi_dma_out_id[bus],
block,
- &U0DBUFXADDR,
+ SPI_BUF(bus),
len,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
- DMA_CFG0_TRIGGER_UTX0,
+ SPI_DMA_TX(bus),
DMA_CFG1_SRCINC_1 |
DMA_CFG1_DESTINC_0 |
DMA_CFG1_PRIORITY_NORMAL);
- ao_dma_start(ao_spi_dma_in_id);
- ao_dma_start(ao_spi_dma_out_id);
- ao_dma_trigger(ao_spi_dma_out_id);
- __critical while (!ao_spi_dma_in_done)
- ao_sleep(&ao_spi_dma_in_done);
+ ao_dma_start(ao_spi_dma_in_id[bus]);
+ ao_dma_start(ao_spi_dma_out_id[bus]);
+ ao_dma_trigger(ao_spi_dma_out_id[bus]);
+#if !AO_SPI_SLAVE
+ __critical while (!ao_spi_dma_in_done[bus])
+ ao_sleep(&ao_spi_dma_in_done[bus]);
+#endif
+#undef bus
+}
+
+#if AO_SPI_SLAVE
+void
+ao_spi_send_wait(void)
+{
+ __critical while (!ao_spi_dma_in_done[0])
+ ao_sleep(&ao_spi_dma_in_done[0]);
}
+#endif
/* Receive bytes over SPI.
*
* writing constant values to the SPI transmitter as that is what
* clocks the data coming in.
*/
+#if MULTI_SPI
+void
+ao_spi_recv(void __xdata *block, uint16_t len, uint8_t bus) __reentrant
+#else
void
ao_spi_recv_bus(void __xdata *block, uint16_t len) __reentrant
+#define bus 0
+#endif
{
- ao_dma_set_transfer(ao_spi_dma_in_id,
- &U0DBUFXADDR,
+ ao_dma_set_transfer(ao_spi_dma_in_id[bus],
+ SPI_BUF(bus),
block,
len,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
- DMA_CFG0_TRIGGER_URX0,
+ SPI_DMA_RX(bus),
DMA_CFG1_SRCINC_0 |
DMA_CFG1_DESTINC_1 |
DMA_CFG1_PRIORITY_NORMAL);
- ao_spi_const = 0xff;
+ ao_spi_const = SPI_CONST;
- ao_dma_set_transfer(ao_spi_dma_out_id,
+#if !AO_SPI_SLAVE
+ ao_dma_set_transfer(ao_spi_dma_out_id[bus],
&ao_spi_const,
- &U0DBUFXADDR,
+ SPI_BUF(bus),
len,
DMA_CFG0_WORDSIZE_8 |
DMA_CFG0_TMODE_SINGLE |
- DMA_CFG0_TRIGGER_UTX0,
+ SPI_DMA_TX(bus),
DMA_CFG1_SRCINC_0 |
DMA_CFG1_DESTINC_0 |
DMA_CFG1_PRIORITY_NORMAL);
+#endif
- ao_dma_start(ao_spi_dma_in_id);
- ao_dma_start(ao_spi_dma_out_id);
- ao_dma_trigger(ao_spi_dma_out_id);
- __critical while (!ao_spi_dma_in_done)
- ao_sleep(&ao_spi_dma_in_done);
+ ao_dma_start(ao_spi_dma_in_id[bus]);
+#if !AO_SPI_SLAVE
+ ao_dma_start(ao_spi_dma_out_id[bus]);
+ ao_dma_trigger(ao_spi_dma_out_id[bus]);
+ __critical while (!ao_spi_dma_in_done[bus])
+ ao_sleep(&ao_spi_dma_in_done[bus]);
+#endif
}
-/*
- * Initialize USART0 for SPI using config alt 2
+#if AO_SPI_SLAVE
+void
+ao_spi_recv_wait(void)
+{
+ __critical while (!ao_spi_dma_in_done[0])
+ ao_sleep(&ao_spi_dma_in_done[0]);
+}
+#endif
+
+/* Set up the USART.
*
- * MO P1_5
- * MI P1_4
- * CLK P1_3
+ * SPI master/slave mode
+ */
+/* Set the baud rate and signal parameters
*
- * Chip select is the responsibility of the caller
+ * The cc1111 is limited to a 24/8 MHz SPI clock.
+ * Every peripheral I've ever seen goes faster than that,
+ * so set the clock to 3MHz (BAUD_E 17, BAUD_M 0)
*/
+#define SPI_INIT(bus,o) do { \
+ /* Set up the USART pin assignment */ \
+ PERCFG = (PERCFG & ~SPI_CFG_MASK(bus)) | SPI_CFG(bus); \
+ \
+ /* Make the SPI pins be controlled by the USART peripheral */ \
+ SPI_SEL(bus) |= SPI_BITS(bus) | CSS(bus); \
+ SPI_CSR(bus) = (UxCSR_MODE_SPI | UxCSR_RE | UxCSR_DIRECTION); \
+ SPI_BAUD(bus) = 0; \
+ SPI_GCR(bus) = (UxGCR_CPOL_NEGATIVE | \
+ UxGCR_CPHA_FIRST_EDGE | \
+ UxGCR_ORDER_MSB | \
+ (17 << UxGCR_BAUD_E_SHIFT)); \
+ /* Set up OUT DMA */ \
+ ao_spi_dma_out_id[o] = ao_dma_alloc(&ao_spi_dma_out_done[o]); \
+ \
+ /* Set up IN DMA */ \
+ ao_spi_dma_in_id[o] = ao_dma_alloc(&ao_spi_dma_in_done[o]); \
+ } while (0)
void
ao_spi_init(void)
{
- /* Set up the USART pin assignment */
- PERCFG = (PERCFG & ~PERCFG_U0CFG_ALT_MASK) | PERCFG_U0CFG_ALT_2;
-
- /* Ensure that USART0 takes precidence over USART1 for pins that
- * they share
+ /* Ensure that SPI USART takes precidence over the other USART
+ * for pins that they share
*/
- P2SEL = (P2SEL & ~P2SEL_PRI3P1_MASK) | P2SEL_PRI3P1_USART0;
+#ifdef SPI_PRI
+ P2SEL = (P2SEL & ~P2SEL_PRI3P1_MASK) | SPI_PRI;
+#endif
- /* Make the SPI pins be controlled by the USART peripheral */
- P1SEL |= ((1 << 5) | (1 << 4) | (1 << 3));
-
- /* Set up OUT DMA */
- ao_spi_dma_out_id = ao_dma_alloc(&ao_spi_dma_out_done);
-
- /* Set up IN DMA */
- ao_spi_dma_in_id = ao_dma_alloc(&ao_spi_dma_in_done);
-
- /* Set up the USART.
- *
- * SPI master mode
- */
- U0CSR = (UxCSR_MODE_SPI | UxCSR_RE | UxCSR_MASTER);
-
- /* Set the baud rate and signal parameters
- *
- * The cc1111 is limited to a 24/8 MHz SPI clock.
- * Every peripheral I've ever seen goes faster than that,
- * so set the clock to 3MHz (BAUD_E 17, BAUD_M 0)
- */
- U0BAUD = 0;
- U0GCR = (UxGCR_CPOL_NEGATIVE |
- UxGCR_CPHA_FIRST_EDGE |
- UxGCR_ORDER_MSB |
- (17 << UxGCR_BAUD_E_SHIFT));
+#if HAS_SPI_0
+ SPI_INIT(0, 0);
+#endif
+#if HAS_SPI_1
+ SPI_INIT(1, MULTI_SPI);
+#endif
}
projects / fw / altos / blobdiff