diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.proto | 6 | ||||
| -rw-r--r-- | src/ao.h | 13 | ||||
| -rw-r--r-- | src/ao_ee.c | 133 | ||||
| -rw-r--r-- | src/ao_flash.c | 137 | ||||
| -rw-r--r-- | src/ao_pins.h | 22 | ||||
| -rw-r--r-- | src/ao_spi.c | 157 | ||||
| -rw-r--r-- | src/ao_telemetrum.c | 1 | ||||
| -rw-r--r-- | src/telemetrum-v0.1-sirf/Makefile.defs | 1 | ||||
| -rw-r--r-- | src/telemetrum-v0.1-sky/Makefile.defs | 1 | ||||
| -rw-r--r-- | src/telemetrum-v1.0/Makefile.defs | 1 | 
10 files changed, 217 insertions, 255 deletions
diff --git a/src/Makefile.proto b/src/Makefile.proto index b23eb257..c79638ac 100644 --- a/src/Makefile.proto +++ b/src/Makefile.proto @@ -72,6 +72,12 @@ TELE_DRIVER_SRC = \  	ao_serial.c  # +# Spi bus driver +# +SPI_DRIVER_SRC = \ +	ao_spi.c + +#  # Debug dongle driver (only on TI)  #  DBG_SRC = \ @@ -737,6 +737,19 @@ ao_serial_init(void);  #endif  /* + * ao_spi.c + */ + +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); + +/*   * ao_gps.c   */ diff --git a/src/ao_ee.c b/src/ao_ee.c index 26cfb7fd..36c8a100 100644 --- a/src/ao_ee.c +++ b/src/ao_ee.c @@ -25,15 +25,8 @@  #define EE_CS		P1_2  #define EE_CS_INDEX	2 -__xdata uint8_t ao_ee_dma_in_done; -__xdata uint8_t ao_ee_dma_out_done;  __xdata uint8_t ao_ee_mutex; -uint8_t	ao_ee_dma_out_id; -uint8_t ao_ee_dma_in_id; - -static __xdata uint8_t	ao_ee_const = 0xff; -  #define ao_ee_delay() do { \  	_asm nop _endasm; \  	_asm nop _endasm; \ @@ -54,82 +47,6 @@ void ao_ee_cs_high(void)  	ao_ee_delay();  } -/* Send bytes over SPI. - * - * This sets up two DMA engines, one writing the data and another reading - * bytes coming back.  We use the bytes coming back to tell when the transfer - * is complete, as the transmit register is double buffered and hence signals - * completion one byte before the transfer is actually complete - */ -static void -ao_ee_send(void __xdata *block, uint16_t len) -{ -	ao_dma_set_transfer(ao_ee_dma_in_id, -			    &U0DBUFXADDR, -			    &ao_ee_const, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_URX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_set_transfer(ao_ee_dma_out_id, -			    block, -			    &U0DBUFXADDR, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_UTX0, -			    DMA_CFG1_SRCINC_1 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_start(ao_ee_dma_in_id); -	ao_dma_start(ao_ee_dma_out_id); -	ao_dma_trigger(ao_ee_dma_out_id); -	__critical while (!ao_ee_dma_in_done) -		ao_sleep(&ao_ee_dma_in_done); -} - -/* Receive bytes over SPI. - * - * This sets up tow DMA engines, one reading the data and another - * writing constant values to the SPI transmitter as that is what - * clocks the data coming in. - */ -static void -ao_ee_recv(void __xdata *block, uint16_t len) -{ -	ao_dma_set_transfer(ao_ee_dma_in_id, -			    &U0DBUFXADDR, -			    block, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_URX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_1 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_set_transfer(ao_ee_dma_out_id, -			    &ao_ee_const, -			    &U0DBUFXADDR, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_UTX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_start(ao_ee_dma_in_id); -	ao_dma_start(ao_ee_dma_out_id); -	ao_dma_trigger(ao_ee_dma_out_id); -	__critical while (!ao_ee_dma_in_done) -		ao_sleep(&ao_ee_dma_in_done); -}  #define EE_BLOCK	256 @@ -143,7 +60,7 @@ ao_ee_write_enable(void)  {  	ao_ee_cs_low();  	ao_ee_instruction.instruction = EE_WREN; -	ao_ee_send(&ao_ee_instruction, 1); +	ao_spi_send(&ao_ee_instruction, 1);  	ao_ee_cs_high();  } @@ -152,8 +69,8 @@ ao_ee_rdsr(void)  {  	ao_ee_cs_low();  	ao_ee_instruction.instruction = EE_RDSR; -	ao_ee_send(&ao_ee_instruction, 1); -	ao_ee_recv(&ao_ee_instruction, 1); +	ao_spi_send(&ao_ee_instruction, 1); +	ao_spi_recv(&ao_ee_instruction, 1);  	ao_ee_cs_high();  	return ao_ee_instruction.instruction;  } @@ -164,7 +81,7 @@ ao_ee_wrsr(uint8_t status)  	ao_ee_cs_low();  	ao_ee_instruction.instruction = EE_WRSR;  	ao_ee_instruction.address[0] = status; -	ao_ee_send(&ao_ee_instruction, 2); +	ao_spi_send(&ao_ee_instruction, 2);  	ao_ee_cs_high();  } @@ -191,8 +108,8 @@ ao_ee_write_block(void)  	ao_ee_instruction.address[0] = ao_ee_block >> 8;  	ao_ee_instruction.address[1] = ao_ee_block;  	ao_ee_instruction.address[2] = 0; -	ao_ee_send(&ao_ee_instruction, 4); -	ao_ee_send(ao_ee_data, EE_BLOCK); +	ao_spi_send(&ao_ee_instruction, 4); +	ao_spi_send(ao_ee_data, EE_BLOCK);  	ao_ee_cs_high();  	for (;;) {  		uint8_t	status = ao_ee_rdsr(); @@ -210,8 +127,8 @@ ao_ee_read_block(void)  	ao_ee_instruction.address[0] = ao_ee_block >> 8;  	ao_ee_instruction.address[1] = ao_ee_block;  	ao_ee_instruction.address[2] = 0; -	ao_ee_send(&ao_ee_instruction, 4); -	ao_ee_recv(ao_ee_data, EE_BLOCK); +	ao_spi_send(&ao_ee_instruction, 4); +	ao_spi_recv(ao_ee_data, EE_BLOCK);  	ao_ee_cs_high();  } @@ -423,39 +340,5 @@ ao_ee_init(void)  	P1DIR |= (1 << EE_CS_INDEX);  	P1SEL &= ~(1 << EE_CS_INDEX); -	/* 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 -	 */ -	P2SEL = (P2SEL & ~P2SEL_PRI3P1_MASK) | P2SEL_PRI3P1_USART0; - -	/* Make the SPI pins be controlled by the USART peripheral */ -	P1SEL |= ((1 << 5) | (1 << 4) | (1 << 3)); - -	/* Set up OUT DMA */ -	ao_ee_dma_out_id = ao_dma_alloc(&ao_ee_dma_out_done); - -	/* Set up IN DMA */ -	ao_ee_dma_in_id = ao_dma_alloc(&ao_ee_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, -	 * while the 25LC1024 is limited to 20MHz. So, -	 * use the 3MHz clock (BAUD_E 17, BAUD_M 0) -	 */ -	U0BAUD = 0; -	U0GCR = (UxGCR_CPOL_NEGATIVE | -		 UxGCR_CPHA_FIRST_EDGE | -		 UxGCR_ORDER_MSB | -		 (17 << UxGCR_BAUD_E_SHIFT));  	ao_cmd_register(&ao_ee_cmds[0]);  } diff --git a/src/ao_flash.c b/src/ao_flash.c index 638e51e0..4f3618ee 100644 --- a/src/ao_flash.c +++ b/src/ao_flash.c @@ -18,22 +18,11 @@  #include "ao.h"  #include "at45db161d.h" -/* - * Using SPI on USART 0, with P1_1 as the chip select - */ -  #define FLASH_CS		P1_1  #define FLASH_CS_INDEX		1 -__xdata uint8_t ao_flash_dma_in_done; -__xdata uint8_t ao_flash_dma_out_done;  __xdata uint8_t ao_flash_mutex; -uint8_t	ao_flash_dma_out_id; -uint8_t ao_flash_dma_in_id; - -static __xdata uint8_t	ao_flash_const = 0xff; -  #define ao_flash_delay() do { \  	_asm nop _endasm; \  	_asm nop _endasm; \ @@ -54,83 +43,6 @@ void ao_flash_cs_high(void)  	ao_flash_delay();  } -/* Send bytes over SPI. - * - * This sets up two DMA engines, one writing the data and another reading - * bytes coming back.  We use the bytes coming back to tell when the transfer - * is complete, as the transmit register is double buffered and hence signals - * completion one byte before the transfer is actually complete - */ -static void -ao_flash_send(void __xdata *block, uint16_t len) -{ -	ao_dma_set_transfer(ao_flash_dma_in_id, -			    &U0DBUFXADDR, -			    &ao_flash_const, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_URX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_set_transfer(ao_flash_dma_out_id, -			    block, -			    &U0DBUFXADDR, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_UTX0, -			    DMA_CFG1_SRCINC_1 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_start(ao_flash_dma_in_id); -	ao_dma_start(ao_flash_dma_out_id); -	ao_dma_trigger(ao_flash_dma_out_id); -	__critical while (!ao_flash_dma_in_done) -		ao_sleep(&ao_flash_dma_in_done); -} - -/* Receive bytes over SPI. - * - * This sets up tow DMA engines, one reading the data and another - * writing constant values to the SPI transmitter as that is what - * clocks the data coming in. - */ -static void -ao_flash_recv(void __xdata *block, uint16_t len) -{ -	ao_dma_set_transfer(ao_flash_dma_in_id, -			    &U0DBUFXADDR, -			    block, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_URX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_1 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_set_transfer(ao_flash_dma_out_id, -			    &ao_flash_const, -			    &U0DBUFXADDR, -			    len, -			    DMA_CFG0_WORDSIZE_8 | -			    DMA_CFG0_TMODE_SINGLE | -			    DMA_CFG0_TRIGGER_UTX0, -			    DMA_CFG1_SRCINC_0 | -			    DMA_CFG1_DESTINC_0 | -			    DMA_CFG1_PRIORITY_NORMAL); - -	ao_dma_start(ao_flash_dma_in_id); -	ao_dma_start(ao_flash_dma_out_id); -	ao_dma_trigger(ao_flash_dma_out_id); -	__critical while (!ao_flash_dma_in_done) -		ao_sleep(&ao_flash_dma_in_done); -} -  struct ao_flash_instruction {  	uint8_t	instruction;  	uint8_t	address[3]; @@ -144,7 +56,7 @@ ao_flash_set_pagesize_512(void)  	ao_flash_instruction.address[0] = FLASH_SET_512_BYTE_0;  	ao_flash_instruction.address[1] = FLASH_SET_512_BYTE_1;  	ao_flash_instruction.address[2] = FLASH_SET_512_BYTE_2; -	ao_flash_send(&ao_flash_instruction, 4); +	ao_spi_send(&ao_flash_instruction, 4);  	ao_flash_cs_high();  } @@ -154,8 +66,8 @@ ao_flash_read_status(void)  {  	ao_flash_cs_low();  	ao_flash_instruction.instruction = FLASH_READ_STATUS; -	ao_flash_send(&ao_flash_instruction, 1); -	ao_flash_recv(&ao_flash_instruction, 1); +	ao_spi_send(&ao_flash_instruction, 1); +	ao_spi_recv(&ao_flash_instruction, 1);  	ao_flash_cs_high();  	return ao_flash_instruction.instruction;  } @@ -268,8 +180,8 @@ ao_flash_write_block(void)  	ao_flash_instruction.address[0] = ao_flash_block >> (16 - ao_flash_block_shift);  	ao_flash_instruction.address[1] = ao_flash_block << (ao_flash_block_shift - 8);  	ao_flash_instruction.address[2] = 0; -	ao_flash_send(&ao_flash_instruction, 4); -	ao_flash_send(ao_flash_data, FLASH_BLOCK_SIZE); +	ao_spi_send(&ao_flash_instruction, 4); +	ao_spi_send(ao_flash_data, FLASH_BLOCK_SIZE);  	ao_flash_cs_high();  	ao_flash_write_pending = 1;  } @@ -286,8 +198,8 @@ ao_flash_read_block(void)  	ao_flash_instruction.address[0] = ao_flash_block >> (16 - ao_flash_block_shift);  	ao_flash_instruction.address[1] = ao_flash_block << (ao_flash_block_shift - 8);  	ao_flash_instruction.address[2] = 0; -	ao_flash_send(&ao_flash_instruction, 4); -	ao_flash_recv(ao_flash_data, FLASH_BLOCK_SIZE); +	ao_spi_send(&ao_flash_instruction, 4); +	ao_spi_recv(ao_flash_data, FLASH_BLOCK_SIZE);  	ao_flash_cs_high();  } @@ -543,40 +455,5 @@ ao_ee_init(void)  	FLASH_CS = 1;  	P1DIR |= (1 << FLASH_CS_INDEX);  	P1SEL &= ~(1 << FLASH_CS_INDEX); - -	/* 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 -	 */ -	P2SEL = (P2SEL & ~P2SEL_PRI3P1_MASK) | P2SEL_PRI3P1_USART0; - -	/* Make the SPI pins be controlled by the USART peripheral */ -	P1SEL |= ((1 << 5) | (1 << 4) | (1 << 3)); - -	/* Set up OUT DMA */ -	ao_flash_dma_out_id = ao_dma_alloc(&ao_flash_dma_out_done); - -	/* Set up IN DMA */ -	ao_flash_dma_in_id = ao_dma_alloc(&ao_flash_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, -	 * while the at45db161d.h is limited to 20MHz. So, -	 * use the 3MHz clock (BAUD_E 17, BAUD_M 0) -	 */ -	U0BAUD = 0; -	U0GCR = (UxGCR_CPOL_NEGATIVE | -		 UxGCR_CPHA_FIRST_EDGE | -		 UxGCR_ORDER_MSB | -		 (17 << UxGCR_BAUD_E_SHIFT));  	ao_cmd_register(&ao_flash_cmds[0]);  } diff --git a/src/ao_pins.h b/src/ao_pins.h index e9a265b0..edbb4908 100644 --- a/src/ao_pins.h +++ b/src/ao_pins.h @@ -31,6 +31,8 @@  	#define AO_LED_RED		1  	#define LEDS_AVAILABLE		(AO_LED_RED)  	#define HAS_EXTERNAL_TEMP	0 +	#define SPI_CS_ON_P1		1 +	#define SPI_CS_ON_P0		0  #endif  #if defined(TELEDONGLE_V_0_2) @@ -45,6 +47,8 @@  	#define AO_LED_RED		1  	#define AO_LED_GREEN		2  	#define LEDS_AVAILABLE		(AO_LED_RED|AO_LED_GREEN) +	#define SPI_CS_ON_P1		1 +	#define SPI_CS_ON_P0		0  #endif  #if defined(TELEMETRUM_V_0_1) @@ -60,6 +64,8 @@  	#define AO_LED_GREEN		1  	#define LEDS_AVAILABLE		(AO_LED_RED|AO_LED_GREEN)  	#define HAS_EXTERNAL_TEMP	1 +	#define SPI_CS_ON_P1		1 +	#define SPI_CS_ON_P0		0  #endif  #if defined(TELEDONGLE_V_0_1) @@ -74,6 +80,8 @@  	#define AO_LED_RED		2  	#define AO_LED_GREEN		1  	#define LEDS_AVAILABLE		(AO_LED_RED|AO_LED_GREEN) +	#define SPI_CS_ON_P1		0 +	#define SPI_CS_ON_P0		1  #endif  #if defined(TIDONGLE) @@ -87,6 +95,8 @@  	#define PACKET_HAS_SLAVE	0  	#define AO_LED_RED		2  	#define LEDS_AVAILABLE		(AO_LED_RED) +	#define SPI_CS_ON_P1		0 +	#define SPI_CS_ON_P0		1  #endif  #if DBG_ON_P1 @@ -125,6 +135,18 @@  #endif /* DBG_ON_P0 */ +#if SPI_CS_ON_P1 +	#define SPI_CS_PORT	P1 +	#define SPI_CS_SEL	P1SEL +	#define SPI_CS_DIR	P1DIR +#endif + +#if SPI_CS_ON_P0 +	#define SPI_CS_PORT	P0 +	#define SPI_CS_SEL	P0SEL +	#define SPI_CS_DIR	P0DIR +#endif +  #ifndef HAS_SERIAL_1  #error Please define HAS_SERIAL_1  #endif diff --git a/src/ao_spi.c b/src/ao_spi.c new file mode 100644 index 00000000..bd52a0d4 --- /dev/null +++ b/src/ao_spi.c @@ -0,0 +1,157 @@ +/* + * Copyright © 2010 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; version 2 of the License. + * + * 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. + */ + +#include "ao.h" + +__xdata uint8_t	ao_spi_mutex; +__xdata uint8_t ao_spi_dma_in_done; +__xdata uint8_t ao_spi_dma_out_done; + +uint8_t	ao_spi_dma_out_id; +uint8_t ao_spi_dma_in_id; + +static __xdata uint8_t ao_spi_const = 0xff; + +/* Send bytes over SPI. + * + * This sets up two DMA engines, one writing the data and another reading + * bytes coming back.  We use the bytes coming back to tell when the transfer + * is complete, as the transmit register is double buffered and hence signals + * completion one byte before the transfer is actually complete + */ +void +ao_spi_send(void __xdata *block, uint16_t len) __reentrant +{ +	ao_mutex_get(&ao_spi_mutex); +	ao_dma_set_transfer(ao_spi_dma_in_id, +			    &U0DBUFXADDR, +			    &ao_spi_const, +			    len, +			    DMA_CFG0_WORDSIZE_8 | +			    DMA_CFG0_TMODE_SINGLE | +			    DMA_CFG0_TRIGGER_URX0, +			    DMA_CFG1_SRCINC_0 | +			    DMA_CFG1_DESTINC_0 | +			    DMA_CFG1_PRIORITY_NORMAL); + +	ao_dma_set_transfer(ao_spi_dma_out_id, +			    block, +			    &U0DBUFXADDR, +			    len, +			    DMA_CFG0_WORDSIZE_8 | +			    DMA_CFG0_TMODE_SINGLE | +			    DMA_CFG0_TRIGGER_UTX0, +			    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_mutex_put(&ao_spi_mutex); +} + +/* Receive bytes over SPI. + * + * This sets up tow DMA engines, one reading the data and another + * writing constant values to the SPI transmitter as that is what + * clocks the data coming in. + */ +void +ao_spi_recv(void __xdata *block, uint16_t len) __reentrant +{ +	ao_mutex_get(&ao_spi_mutex); +	ao_dma_set_transfer(ao_spi_dma_in_id, +			    &U0DBUFXADDR, +			    block, +			    len, +			    DMA_CFG0_WORDSIZE_8 | +			    DMA_CFG0_TMODE_SINGLE | +			    DMA_CFG0_TRIGGER_URX0, +			    DMA_CFG1_SRCINC_0 | +			    DMA_CFG1_DESTINC_1 | +			    DMA_CFG1_PRIORITY_NORMAL); + +	ao_dma_set_transfer(ao_spi_dma_out_id, +			    &ao_spi_const, +			    &U0DBUFXADDR, +			    len, +			    DMA_CFG0_WORDSIZE_8 | +			    DMA_CFG0_TMODE_SINGLE | +			    DMA_CFG0_TRIGGER_UTX0, +			    DMA_CFG1_SRCINC_0 | +			    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_mutex_put(&ao_spi_mutex); +} + +/* + * Initialize USART0 for SPI using config alt 2 + * + * 	MO	P1_5 + * 	MI	P1_4 + * 	CLK	P1_3 + * + * Chip select is the responsibility of the caller + */ + +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 +	 */ +	P2SEL = (P2SEL & ~P2SEL_PRI3P1_MASK) | P2SEL_PRI3P1_USART0; + +	/* 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)); +} diff --git a/src/ao_telemetrum.c b/src/ao_telemetrum.c index fd0adae8..1209c820 100644 --- a/src/ao_telemetrum.c +++ b/src/ao_telemetrum.c @@ -48,6 +48,7 @@ main(void)  	ao_adc_init();  	ao_beep_init();  	ao_cmd_init(); +	ao_spi_init();  	ao_ee_init();  	ao_flight_init();  	ao_log_init(); diff --git a/src/telemetrum-v0.1-sirf/Makefile.defs b/src/telemetrum-v0.1-sirf/Makefile.defs index a7310fbc..ac8dcdb9 100644 --- a/src/telemetrum-v0.1-sirf/Makefile.defs +++ b/src/telemetrum-v0.1-sirf/Makefile.defs @@ -2,6 +2,7 @@ PROG = telemetrum-v0.1-sirf-$(VERSION).ihx  SRC = \  	$(TM_BASE_SRC) \ +	$(SPI_DRIVER_SRC) \  	$(EE_DRIVER_SRC) \  	$(SIRF_DRIVER_SRC) \  	$(DBG_SRC) diff --git a/src/telemetrum-v0.1-sky/Makefile.defs b/src/telemetrum-v0.1-sky/Makefile.defs index 000287ba..e032d1eb 100644 --- a/src/telemetrum-v0.1-sky/Makefile.defs +++ b/src/telemetrum-v0.1-sky/Makefile.defs @@ -2,6 +2,7 @@ PROG = telemetrum-v0.1-sky-$(VERSION).ihx  SRC = \  	$(TM_BASE_SRC) \ +	$(SPI_DRIVER_SRC) \  	$(EE_DRIVER_SRC) \  	$(SKY_DRIVER_SRC) \  	$(DBG_SRC) diff --git a/src/telemetrum-v1.0/Makefile.defs b/src/telemetrum-v1.0/Makefile.defs index 010578df..a60a501a 100644 --- a/src/telemetrum-v1.0/Makefile.defs +++ b/src/telemetrum-v1.0/Makefile.defs @@ -2,6 +2,7 @@ PROG = telemetrum-v1.0-$(VERSION).ihx  SRC = \  	$(TM_BASE_SRC) \ +	$(SPI_DRIVER_SRC) \  	$(FLASH_DRIVER_SRC) \  	$(SKY_DRIVER_SRC) \  	$(DBG_SRC)  | 
