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1ac0eb Bob Green 2026-03-19 08:22:37
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# Duart
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## Definitions
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### Duart
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#### vasm
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```asm
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```
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#### gcc
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```c
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/* Duart Register Base Addresses */
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#define duart_base ((volatile uint8_t*) 0xad0001)
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#define duart_mr1a ((volatile uint8_t*) duart_base)
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#define duart_mr2a ((volatile uint8_t*) duart_base)
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#define duart_sra ((volatile uint8_t*) duart_base+2)
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#define duart_csra ((volatile uint8_t*) duart_base+2)
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#define duart_cra ((volatile uint8_t*) duart_base+4)
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#define duart_rba ((volatile uint8_t*) duart_base+6)
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#define duart_tba ((volatile uint8_t*) duart_base+6)
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#define duart_ipcr ((volatile uint8_t*) duart_base+8)
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#define duart_acr ((volatile uint8_t*) duart_base+8)
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#define duart_isr ((volatile uint8_t*) duart_base+10)
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#define duart_imr ((volatile uint8_t*) duart_base+10)
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#define duart_cur ((volatile uint8_t*) duart_base+12)
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#define duart_ctur ((volatile uint8_t*) duart_base+12)
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#define duart_clr ((volatile uint8_t*) duart_base+14)
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#define duart_ctlr ((volatile uint8_t*) duart_base+14)
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#define duart_mr1b ((volatile uint8_t*) duart_base+16)
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#define duart_mr2b ((volatile uint8_t*) duart_base+16)
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#define duart_srb ((volatile uint8_t*) duart_base+18)
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#define duart_csrb ((volatile uint8_t*) duart_base+18)
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#define duart_crb ((volatile uint8_t*) duart_base+20)
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#define duart_rbb ((volatile uint8_t*) duart_base+22)
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#define duart_tbb ((volatile uint8_t*) duart_base+22)
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#define duart_ivr ((volatile uint8_t*) duart_base+24)
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#define duart_opcr ((volatile uint8_t*) duart_base+26)
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#define duart_start_counter ((volatile uint8_t*) duart_base+28)
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#define duart_opr_set ((volatile uint8_t*) duart_base+28)
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#define duart_stop_counter ((volatile uint8_t*) duart_base+30)
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#define duart_opr_reset ((volatile uint8_t*) duart_base+30)
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/* Status Register A and B */
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#define SR_RXRDY 0x01
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#define SR_RX_READY 0x01
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#define SR_TXRDY 0x04
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#define SR_TX_READY 0x04
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#define SR_TX_EMPTY 0x08
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/* Command Register A and B */
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#define CR_NOP 0x00
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#define CR_RESET_MR_PTR 0x10
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#define CR_RESET_RX 0x20
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#define CR_RESET_TX 0x30
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#define CR_RESET_ERROR 0x40
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#define CR_RESET_BREAK 0x50
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#define CR_START_BREAK 0x60
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#define CR_STOP_BREAK 0x70
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#define CR_SET_EXT_RX 0x80
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#define CR_CLEAR_EXT_RX 0x90
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#define CR_SET_EXT_TX 0xa0
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#define CR_CLEAR_EXT_TX 0xb0
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#define CR_STANDBY_MODE 0xc0
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#define CR_ACTIVE_MODE 0xd0
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#define CR_ENABLE_TX 0x04
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#define CR_DISABLE_TX 0x08
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#define CR_ENABLE_RX 0x01
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#define CR_DISABLE_RX 0x02
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/* Interrupt Status Register */
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#define GLOBAL_ISR_TXRDY_A 0x01
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#define GLOBAL_ISR_RXRDY_A 0x02
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#define GLOBAL_ISR_TXRDY_B 0x10
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#define GLOBAL_ISR_RXRDY_B 0x20
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#define ISR_TX_READY 0x01
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#define ISR_RX_READY 0x02
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```