i2c.inc

DSP中用MCBSP模拟I2C接口的程序.其中DSP的型号是C5416

* filename : i2c.inc *
* -contains all constants and flags used in program  *


*I2CSTATUS Register
*Status of I2C transmission
*+---------------------------------------------------------------------------------+
*| 15 | 14 | 13 | 12 | 11 | 10 | 9  | 8  |  7  | 6  5 |  4 |  3  |  2  |  1  |  0  |
*+---------------------------------------------------------------------------------+
*|DISA|CTRL|SUCC|ERR |ACK |STOP|CLKL|CLKH|Start| Mode |Addr| Pre | Pre | Cur | Cur |
*|    |    |    |    |    |    |    |    |     |      |    | SCL | SDA | SCL | SDA |
*+---------------------------------------------------------------------------------+

K_CSDA_1			.set 0000000000000001b	;current SDA is high
K_CSDA_0			.set 1111111111111110b	;current SDA is low 
K_CSCL_1			.set 0000000000000010b	;current SCL is high
K_CSCL_0			.set 1111111111111101b	;current SCL is low 

K_PSDA_1			.set 0000000000000100b	;previous SDA is high
K_PSDA_0			.set 1111111111111011b	;previous SDA is low 
K_PSCL_1			.set 0000000000001000b	;previous SCL is high
K_PSCL_0			.set 1111111111110111b	;previous SCL is low 
                                            
K_ADDR_1			.set 0000000000010000b 	;Slave address flag on                                                          
K_ADDR_0			.set 1111111111101111b	;

K_READ_FROM_SLAVE	.set 0000000001000000b	;DSP read from slave
K_WRITE_TO_SLAVE	.set 0000000000100000b  ;DSP write to slave
K_READ_FROM_MASTER	.set 0000000000000000b	;DSP read from master
K_WRITE_TO_MASTER	.set 0000000001100000b	;DSP write to master     

K_START_1			.set 0000000010000000b	;Start condition      
K_START_0			.set 1111111101111111b	;Not start condition      
 
K_CLKH_1			.set 0000000100000000b	;next interrupt set SCL=high
K_CLKH_0			.set 1111111011111111b	;disable this feature  

K_CLKL_1			.set 0000001000000000b	;next interrupt set SCL=low
K_CLKL_0			.set 1111110111111111b	;disable this feature

K_STOP_1			.set 0000010000000000b	;Stop condition
K_STOP_0			.set 1111101111111111b	;disable this feature

K_ACK_1				.set 0000100000000000b	;Next interrupt is ACK
K_ACK_0				.set 1111011111111111b	;disable this feature

K_ERR_1				.set 0001000000000000b	;Error
K_ERR_0				.set 1110111111111111b	;

K_SUCC_1			.set 0010000000000000b	;I2C protocol enable
K_SUCC_0			.set 1101111111111111b	;disable
 
K_DISA_1			.set 1000000000000000b	;I2C protocol disable
K_DISA_0			.set 0111111111111111b	;enable       

K_RESET_I2C			.set 0          

K_I2C_READ  		.set 1					;Attach a R/W bit at the	
K_I2C_WRITE 		.set 0                  ;end of slave address


*ERRORMSG Register
*Error message of I2C
*   +------------------------+
*	| 15    3  |  2   1   0  |
*   +------------------------+
*	| xxxx	   |   ERRCODE   |
*   +------------------------+
K_ERR_NO_ERROR		.set 000b
K_ERR_NOACK			.set 001b
K_ERR_UNKNOWN		.set 010b   



;************************
;***USER PERFERENCE SETUP
;************************

;***SETUP SLAVE ADDRESS*************************************************************
K_SLAVEADDR 		.set 0100100B				;set slave address (7bits)  
;***********************************************************************************

;***SELECT SITUATIONS TO STOP DATA TRANSFER*****************************************
K_DISABLE_I2C		.set K_SUCC_1					;Stop after transfer is over
;K_DISABLE_I2C		.set K_SUCC_1|K_ERR_1|K_DISA_1  ;Stop when error or disable occurs
;***********************************************************************************

;*******************************
;***END OF USER PERFERENCE SETUP
;*******************************