AN413 datasheet(40/45 Pages) STMICROELECTRONICS

40 / 45 page

Examples of SCI configurations

AN413

40/45

Doc ID 1875 Rev 2

;*********************************************************************

proc INIT_SCI {

;—- Communication format configuration.

;

; Communication format is configured as follows:

;

- 8 data bit transmitted or received character.

;

- 1 stop bit included in data format.

;

- Parity even.

;

- 9600 Baud communication rate.

;—- SCI configuration.

;

- No address bit included between the parity bit and the stop bit.

;

- Address mode: Address interrupt if character match.

;

- DMA permits transmission from EEPROM memory to serial line.

;

- Receiver data interrupt unmask (to detect a received data item).

;

- Transmitter data interrupt unmask (to detect DMA end of block).

;

- Receiver error interrupt unmask (to detect overrun, parity or framing

error).

spp #SCI1_PG ; SCI register page.

srp #BK_F ; To address SCI registers with r.

ld s_brglr,#00 ; Reset SCI

ld s_chcr,#( wl8 | sb10 | pen | ep | am )

; 8 data bit.

; 1 stop bit.

; Parity even.

; No address bit.

; AME = 0, AM = 1.

; = IT if character match.

ld s_ccr,#txclk ; Xmit clock source = BRG.

; Receiver clock source = BRG.

; 16x asynchronous mode.

ld s_acr,#RETURN ; End Of Command acquisition.

;—- Interrupt and DMA configuration.

ld s_ivr,#SCI_IT ; Interrupt vector register.

ld s_tdcpr,#NUM_TDCP ; Tx DMA counter in register file.

ld s_imr,#( rxdi | rxa | rxe )

; Mask Transmitter data interrupt.

AN413 数据表(PDF) 40 Page - STMicroelectronics

AN413 数据表(HTML) 40 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

数据表下载