#define 	AT91C_SPI_BITS_10                   (0x2 <<  4) // (SPI) 10 Bits Per transfer
#define 	AT91C_SPI_BITS_11                   (0x3 <<  4) // (SPI) 11 Bits Per transfer
#define 	AT91C_SPI_BITS_12                   (0x4 <<  4) // (SPI) 12 Bits Per transfer
#define 	AT91C_SPI_BITS_13                   (0x5 <<  4) // (SPI) 13 Bits Per transfer
#define 	AT91C_SPI_BITS_14                   (0x6 <<  4) // (SPI) 14 Bits Per transfer
#define 	AT91C_SPI_BITS_15                   (0x7 <<  4) // (SPI) 15 Bits Per transfer
#define 	AT91C_SPI_BITS_16                   (0x8 <<  4) // (SPI) 16 Bits Per transfer
#define AT91C_SPI_SCBR            (0xFF <<  8) // (SPI) Serial Clock Baud Rate
#define AT91C_SPI_DLYBS           (0xFF << 16) // (SPI) Serial Clock Baud Rate
#define AT91C_SPI_DLYBCT          (0xFF << 24) // (SPI) Delay Between Consecutive Transfers

// *****************************************************************************
//              SOFTWARE API DEFINITION  FOR Synchronous Serial Controller Interface
// *****************************************************************************
// *** Register offset in AT91S_SSC structure ***
#define SSC_CR          ( 0) // Control Register
#define SSC_CMR         ( 4) // Clock Mode Register
#define SSC_RCMR        (16) // Receive Clock ModeRegister
#define SSC_RFMR        (20) // Receive Frame Mode Register
#define SSC_TCMR        (24) // Transmit Clock Mode Register
#define SSC_TFMR        (28) // Transmit Frame Mode Register
#define SSC_RHR         (32) // Receive Holding Register
#define SSC_THR         (36) // Transmit Holding Register
#define SSC_RSHR        (48) // Receive Sync Holding Register
#define SSC_TSHR        (52) // Transmit Sync Holding Register
#define SSC_RC0R        (56) // Receive Compare 0 Register
#define SSC_RC1R        (60) // Receive Compare 1 Register
#define SSC_SR          (64) // Status Register
#define SSC_IER         (68) // Interrupt Enable Register
#define SSC_IDR         (72) // Interrupt Disable Register
#define SSC_IMR         (76) // Interrupt Mask Register
#define SSC_RPR         (256) // Receive Pointer Register
#define SSC_RCR         (260) // Receive Counter Register
#define SSC_TPR         (264) // Transmit Pointer Register
#define SSC_TCR         (268) // Transmit Counter Register
#define SSC_RNPR        (272) // Receive Next Pointer Register
#define SSC_RNCR        (276) // Receive Next Counter Register
#define SSC_TNPR        (280) // Transmit Next Pointer Register
#define SSC_TNCR        (284) // Transmit Next Counter Register
#define SSC_PTCR        (288) // PDC Transfer Control Register
#define SSC_PTSR        (292) // PDC Transfer Status Register
// -------- SSC_CR : (SSC Offset: 0x0) SSC Control Register -------- 
#define AT91C_SSC_RXEN            (0x1 <<  0) // (SSC) Receive Enable
#define AT91C_SSC_RXDIS           (0x1 <<  1) // (SSC) Receive Disable
#define AT91C_SSC_TXEN            (0x1 <<  8) // (SSC) Transmit Enable
#define AT91C_SSC_TXDIS           (0x1 <<  9) // (SSC) Transmit Disable
#define AT91C_SSC_SWRST           (0x1 << 15) // (SSC) Software Reset
// -------- SSC_RCMR : (SSC Offset: 0x10) SSC Receive Clock Mode Register -------- 
#define AT91C_SSC_CKS             (0x3 <<  0) // (SSC) Receive/Transmit Clock Selection
#define 	AT91C_SSC_CKS_DIV                  (0x0) // (SSC) Divided Clock
#define 	AT91C_SSC_CKS_TK                   (0x1) // (SSC) TK Clock signal
#define 	AT91C_SSC_CKS_RK                   (0x2) // (SSC) RK pin
#define AT91C_SSC_CKO             (0x7 <<  2) // (SSC) Receive/Transmit Clock Output Mode Selection
#define 	AT91C_SSC_CKO_NONE                 (0x0 <<  2) // (SSC) Receive/Transmit Clock Output Mode: None RK pin: Input-only
#define 	AT91C_SSC_CKO_CONTINOUS            (0x1 <<  2) // (SSC) Continuous Receive/Transmit Clock RK pin: Output
#define 	AT91C_SSC_CKO_DATA_TX              (0x2 <<  2) // (SSC) Receive/Transmit Clock only during data transfers RK pin: Output
#define AT91C_SSC_CKI             (0x1 <<  5) // (SSC) Receive/Transmit Clock Inversion
#define AT91C_SSC_CKG             (0x3 <<  6) // (SSC) Receive/Transmit Clock Gating Selection
#define 	AT91C_SSC_CKG_NONE                 (0x0 <<  6) // (SSC) Receive/Transmit Clock Gating: None, continuous clock
#define 	AT91C_SSC_CKG_LOW                  (0x1 <<  6) // (SSC) Receive/Transmit Clock enabled only if RF Low
#define 	AT91C_SSC_CKG_HIGH                 (0x2 <<  6) // (SSC) Receive/Transmit Clock enabled only if RF High
#define AT91C_SSC_START           (0xF <<  8) // (SSC) Receive/Transmit Start Selection
#define 	AT91C_SSC_START_CONTINOUS            (0x0 <<  8) // (SSC) Continuous, as soon as the receiver is enabled, and immediately after the end of transfer of the previous data.
#define 	AT91C_SSC_START_TX                   (0x1 <<  8) // (SSC) Transmit/Receive start
#define 	AT91C_SSC_START_LOW_RF               (0x2 <<  8) // (SSC) Detection of a low level on RF input
#define 	AT91C_SSC_START_HIGH_RF              (0x3 <<  8) // (SSC) Detection of a high level on RF input
#define 	AT91C_SSC_START_FALL_RF              (0x4 <<  8) // (SSC) Detection of a falling edge on RF input
#define 	AT91C_SSC_START_RISE_RF              (0x5 <<  8) // (SSC) Detection of a rising edge on RF input
#define 	AT91C_SSC_START_LEVEL_RF             (0x6 <<  8) // (SSC) Detection of any level change on RF input
#define 	AT91C_SSC_START_EDGE_RF              (0x7 <<  8) // (SSC) Detection of any edge on RF input
#define 	AT91C_SSC_START_0                    (0x8 <<  8) // (SSC) Compare 0
#define AT91C_SSC_STOP            (0x1 << 12) // (SSC) Receive Stop Selection
#define AT91C_SSC_STTOUT          (0x1 << 15) // (SSC) Receive/Transmit Start Output Selection
#define AT91C_SSC_STTDLY          (0xFF << 16) // (SSC) Receive/Transmit Start Delay
#define AT91C_SSC_PERIOD          (0xFF << 24) // (SSC) Receive/Transmit Period Divider Selection
// -------- SSC_RFMR : (SSC Offset: 0x14) SSC Receive Frame Mode Register -------- 
#define AT91C_SSC_DATLEN          (0x1F <<  0) // (SSC) Data Length
#define AT91C_SSC_LOOP            (0x1 <<  5) // (SSC) Loop Mode
#define AT91C_SSC_MSBF            (0x1 <<  7) // (SSC) Most Significant Bit First
#define AT91C_SSC_DATNB           (0xF <<  8) // (SSC) Data Number per Frame
#define AT91C_SSC_FSLEN           (0xF << 16) // (SSC) Receive/Transmit Frame Sync length
#define AT91C_SSC_FSOS            (0x7 << 20) // (SSC) Receive/Transmit Frame Sync Output Selection
#define 	AT91C_SSC_FSOS_NONE                 (0x0 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: None RK pin Input-only
#define 	AT91C_SSC_FSOS_NEGATIVE             (0x1 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: Negative Pulse
#define 	AT91C_SSC_FSOS_POSITIVE             (0x2 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: Positive Pulse
#define 	AT91C_SSC_FSOS_LOW                  (0x3 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: Driver Low during data transfer
#define 	AT91C_SSC_FSOS_HIGH                 (0x4 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: Driver High during data transfer
#define 	AT91C_SSC_FSOS_TOGGLE               (0x5 << 20) // (SSC) Selected Receive/Transmit Frame Sync Signal: Toggling at each start of data transfer
#define AT91C_SSC_FSEDGE          (0x1 << 24) // (SSC) Frame Sync Edge Detection
// -------- SSC_TCMR : (SSC Offset: 0x18) SSC Transmit Clock Mode Register -------- 
// -------- SSC_TFMR : (SSC Offset: 0x1c) SSC Transmit Frame Mode Register -------- 
#define AT91C_SSC_DATDEF          (0x1 <<  5) // (SSC) Data Default Value
#define AT91C_SSC_FSDEN           (0x1 << 23) // (SSC) Frame Sync Data Enable
// -------- SSC_SR : (SSC Offset: 0x40) SSC Status Register -------- 
#define AT91C_SSC_TXRDY           (0x1 <<  0) // (SSC) Transmit Ready
#define AT91C_SSC_TXEMPTY         (0x1 <<  1) // (SSC) Transmit Empty
#define AT91C_SSC_ENDTX           (0x1 <<  2) // (SSC) End Of Transmission
#define AT91C_SSC_TXBUFE          (0x1 <<  3) // (SSC) Transmit Buffer Empty
#define AT91C_SSC_RXRDY           (0x1 <<  4) // (SSC) Receive Ready
#define AT91C_SSC_OVRUN           (0x1 <<  5) // (SSC) Receive Overrun
#define AT91C_SSC_ENDRX           (0x1 <<  6) // (SSC) End of Reception
#define AT91C_SSC_RXBUFF          (0x1 <<  7) // (SSC) Receive Buffer Full
#define AT91C_SSC_CP0             (0x1 <<  8) // (SSC) Compare 0
#define AT91C_SSC_CP1             (0x1 <<  9) // (SSC) Compare 1
#define AT91C_SSC_TXSYN           (0x1 << 10) // (SSC) Transmit Sync
#define AT91C_SSC_RXSYN           (0x1 << 11) // (SSC) Receive Sync
#define AT91C_SSC_TXENA           (0x1 << 16) // (SSC) Transmit Enable
#define AT91C_SSC_RXENA           (0x1 << 17) // (SSC) Receive Enable
// -------- SSC_IER : (SSC Offset: 0x44) SSC Interrupt Enable Register -------- 
// -------- SSC_IDR : (SSC Offset: 0x48) SSC Interrupt Disable Register -------- 
// -------- SSC_IMR : (SSC Offset: 0x4c) SSC Interrupt Mask Register -------- 

// *****************************************************************************
//              SOFTWARE API DEFINITION  FOR Usart
// *****************************************************************************
// *** Register offset in AT91S_USART structure ***
#define US_CR           ( 0) // Control Register
#define US_MR           ( 4) // Mode Register
#define US_IER          ( 8) // Interrupt Enable Register
#define US_IDR          (12) // Interrupt Disable Register
#define US_IMR          (16) // Interrupt Mask Register
#define US_CSR          (20) // Channel Status Register
#define US_RHR          (24) // Receiver Holding Register
#define US_THR          (28) // Transmitter Holding Register
#define US_BRGR         (32) // Baud Rate Generator Register
#define US_RTOR         (36) // Receiver Time-out Register
#define US_TTGR         (40) // Transmitter Time-guard Register
#define US_FIDI         (64) // FI_DI_Ratio Register
#define US_NER          (68) // Nb Errors Register
#define US_XXR          (72) // XON_XOFF Register
#define US_IF           (76) // IRDA_FILTER Register
#define US_RPR          (256) // Receive Pointer Register
#define US_RCR          (260) // Receive Counter Register
#define US_TPR          (264) // Transmit Pointer Register
#define US_TCR          (268) // Transmit Counter Register
#define US_RNPR         (272) // Receive Next Pointer Register
#define US_RNCR         (276) // Receive Next Counter Register
#define US_TNPR         (280) // Transmit Next Pointer Register
#define US_TNCR         (284) // Transmit Next Counter Register
#define US_PTCR         (288) // PDC Transfer Control Register
#define US_PTSR         (292) // PDC Transfer Status Register
// -------- US_CR : (USART Offset: 0x0) Debug Unit Control Register -------- 
#define AT91C_US_RSTSTA           (0x1 <<  8) // (USART) Reset Status Bits
#define AT91C_US_STTBRK           (0x1 <<  9) // (USART) Start Break
#define AT91C_US_STPBRK           (0x1 << 10) // (USART) Stop Break
#define AT91C_US_STTTO            (0x1 << 11) // (USART) Start Time-out
#define AT91C_US_SENDA            (0x1 << 12) // (USART) Send Address
#define AT91C_US_RSTIT            (0x1 << 13) // (USART) Reset Iterations
#define AT91C_US_RSTNACK          (0x1 << 14) // (USART) Reset Non Acknowledge
#define AT91C_US_RETTO            (0x1 << 15) // (USART) Rearm Time-out
#define AT91C_US_DTREN            (0x1 << 16) // (USART) Data Terminal ready Enable
#define AT91C_US_DTRDIS           (0x1 << 17) // (USART) Data Terminal ready Disable
#define AT91C_US_RTSEN            (0x1 << 18) // (USART) Request to Send enable
#define AT91C_US_RTSDIS           (0x1 << 19) // (USART) Request to Send Disable
// -------- US_MR : (USART Offset: 0x4) Debug Unit Mode Register -------- 
#define AT91C_US_USMODE           (0xF <<  0) // (USART) Usart mode
#define 	AT91C_US_USMODE_NORMAL               (0x0) // (USART) Normal
#define 	AT91C_US_USMODE_RS485                (0x1) // (USART) RS485
#define 	AT91C_US_USMODE_HWHSH                (0x2) // (USART) Hardware Handshaking
#define 	AT91C_US_USMODE_MODEM                (0x3) // (USART) Modem
#define 	AT91C_US_USMODE_ISO7816_0            (0x4) // (USART) ISO7816 protocol: T = 0
#define 	AT91C_US_USMODE_ISO7816_1            (0x6) // (USART) ISO7816 protocol: T = 1
#define 	AT91C_US_USMODE_IRDA                 (0x8) // (USART) IrDA
#define 	AT91C_US_USMODE_SWHSH                (0xC) // (USART) Software Handshaking
#define AT91C_US_CLKS             (0x3 <<  4) // (USART) Clock Selection (Baud Rate generator Input Clock
#define 	AT91C_US_CLKS_CLOCK                (0x0 <<  4) // (USART) Clock
#define 	AT91C_US_CLKS_FDIV1                (0x1 <<  4) // (USART) fdiv1
#define 	AT91C_US_CLKS_SLOW                 (0x2 <<  4) // (USART) slow_clock (ARM)
#define 	AT91C_US_CLKS_EXT                  (0x3 <<  4) // (USART) External (SCK)
#define AT91C_US_CHRL             (0x3 <<  6) // (USART) Clock Selection (Baud Rate generator Input Clock
#define 	AT91C_US_CHRL_5_BITS               (0x0 <<  6) // (USART) Character Length: 5 bits
#define 	AT91C_US_CHRL_6_BITS               (0x1 <<  6) // (USART) Character Length: 6 bits
#define 	AT91C_US_CHRL_7_BITS               (0x2 <<  6) // (USART) Character Length: 7 bits
#define 	AT91C_US_CHRL_8_BITS               (0x3 <<  6) // (USART) Character Length: 8 bits
#define AT91C_US_SYNC             (0x1 <<  8) // (USART) Synchronous Mode Select
#define AT91C_US_NBSTOP           (0x3 << 12) // (USART) Number of Stop bits
#define 	AT91C_US_NBSTOP_1_BIT                (0x0 << 12) // (USART) 1 stop bit