projects / avrcpm.git / blame
| Commit | Line | Data |
|---|---|---|
| 12a27f27 L |
1 | |
| 2 | ;----------------------------- ISC16IS740 UART ------------------------------- | |
| 3 | I2C_UART_PORT equ 50H | |
| 4 | ||
| 5 | I2C_UART_RHR equ I2C_UART_PORT+00H ;R Receive Holding | |
| 6 | I2C_UART_THR equ I2C_UART_PORT+00H ;W Transmit Holding | |
| 7 | I2C_UART_IER equ I2C_UART_PORT+01H ;R/W Interrupt Enable | |
| 8 | I2C_UART_FCR equ I2C_UART_PORT+02H ;W FIFO Control | |
| 9 | I2C_UART_IIR equ I2C_UART_PORT+02H ;R Interrupt Identification | |
| 10 | I2C_UART_LCR equ I2C_UART_PORT+03H ;R/W Line Control | |
| 11 | I2C_UART_MCR equ I2C_UART_PORT+04H ;R/W Modem Control | |
| 12 | I2C_UART_LSR equ I2C_UART_PORT+05H ;R Line Status | |
| 13 | I2C_UART_MSR equ I2C_UART_PORT+06H ;R Modem Status | |
| 14 | I2C_UART_SPR equ I2C_UART_PORT+07H ;R/W Scratchpad | |
| 15 | I2C_UART_TCR equ I2C_UART_PORT+06H ;R/W Transmission Control | |
| 16 | I2C_UART_TLR equ I2C_UART_PORT+07H ;R/W Trigger Level | |
| 17 | I2C_UART_TXLVL equ I2C_UART_PORT+08H ;R Transmit FIFO Level | |
| 18 | I2C_UART_RXLVL equ I2C_UART_PORT+09H ;R Receive FIFO Level | |
| 19 | I2C_UART_EFCR equ I2C_UART_PORT+0FH ;R/W Extra Features | |
| 20 | I2C_UART_DLL equ I2C_UART_PORT+00H ;R/W divisor latch LSB | |
| 21 | I2C_UART_DLH equ I2C_UART_PORT+01H ;R/W divisor latch MSB | |
| 22 | I2C_UART_EFR equ I2C_UART_PORT+02H ;R/W Enhanced Feature | |
| 23 | I2C_UART_XON1 equ I2C_UART_PORT+04H ;R/W Xon1 word | |
| 24 | I2C_UART_XON2 equ I2C_UART_PORT+05H ;R/W Xon2 word | |
| 25 | I2C_UART_XOFF1 equ I2C_UART_PORT+06H ;R/W Xoff1 word | |
| 26 | I2C_UART_XOFF2 equ I2C_UART_PORT+07H ;R/W Xoff2 word | |
| 27 | ||
| 28 | ||
| 29 | ;----------------------------------------------------------------------------- | |
| 30 | ; Output character in C | |
| 31 | ; Return with character in C and A | |
| 32 | ||
| 33 | i2c_uart_out: | |
| 34 | IN A,(I2C_UART_LSR) | |
| 35 | AND 20H | |
| 36 | JR Z,i2c_uart_out ; wait till ready | |
| 37 | LD A,C | |
| 38 | OUT (I2C_UART_THR),A | |
| 39 | RET | |
| 40 | ||
| 41 | ;----------------------------------------------------------------------------- | |
| 42 | ; Get character from I2C UART | |
| 43 | ; Return character in A | |
| 44 | ||
| 45 | i2c_uart_in: | |
| 46 | IN A,(I2C_UART_LSR) | |
| 47 | AND 01H | |
| 48 | JR Z,i2c_uart_in ; wait till ready | |
| 49 | IN (I2C_UART_RHR),A | |
| 50 | RET |