URL
https://opencores.org/ocsvn/minsoc/minsoc/trunk
Subversion Repositories minsoc
Compare Revisions
- This comparison shows the changes necessary to convert path
/minsoc/tags/release-0.9/sw/drivers
- from Rev 37 to Rev 42
- ↔ Reverse comparison
Rev 37 → Rev 42
/eth.c
0,0 → 1,102
#include "../support/board.h" |
#include "../support/support.h" |
#include "eth.h" |
|
int eth_tx_done; |
int eth_rx_done; |
int eth_rx_len; |
unsigned char eth_tx_packet[1536]; //max length |
unsigned char eth_rx_packet[1536]; |
unsigned char * eth_tx_data; |
unsigned char * eth_rx_data; |
|
void eth_recv_ack(void) |
{ |
eth_rx_done = 0; |
eth_rx_len = 0; |
//accept further data (reset RXBD to empty) |
REG32(ETH_BASE + ETH_RXBD0L) = RX_READY; //len = 0 | IRQ & WR = 1 | EMPTY = 1 |
} |
|
void eth_init() |
{ |
//TXEN & RXEN = 1; PAD & CRC = 1; FULLD = 1 |
REG32(ETH_BASE + ETH_MODER) = ETH_TXEN | ETH_RXEN | ETH_PAD | ETH_CRCEN | ETH_FULLD; |
//PHY Address = 0x001 |
REG32(ETH_BASE + ETH_MIIADDRESS) = 0x00000001; |
|
//enable all interrupts |
REG32(ETH_BASE + ETH_INT_MASK) = ETH_RXB | ETH_TXB; |
|
//set MAC ADDRESS |
REG32(ETH_BASE + ETH_MAC_ADDR1) = (OWN_MAC_ADDRESS_5 << 8) | OWN_MAC_ADDRESS_4; //low word = mac address high word |
REG32(ETH_BASE + ETH_MAC_ADDR0) = (OWN_MAC_ADDRESS_3 << 24) | (OWN_MAC_ADDRESS_2 << 16) |
| (OWN_MAC_ADDRESS_1 << 8) | OWN_MAC_ADDRESS_0; //mac address rest |
|
//configure TXBD0 |
REG32(ETH_BASE + ETH_TXBD0H) = (unsigned long)eth_tx_packet; //address used for tx_data |
REG32(ETH_BASE + ETH_TXBD0L) = TX_READY; //length = 0 | PAD & CRC = 1 | IRQ & WR = 1 |
|
//configure RXBD0 |
REG32(ETH_BASE + ETH_RXBD0H) = (unsigned long)eth_rx_packet; //address used for tx_data |
REG32(ETH_BASE + ETH_RXBD0L) = RX_READY; //len = 0 | IRQ & WR = 1 | EMPTY = 1 |
|
//set txdata |
eth_tx_packet[0] = BROADCAST_ADDRESS_5; |
eth_tx_packet[1] = BROADCAST_ADDRESS_4; |
eth_tx_packet[2] = BROADCAST_ADDRESS_3; |
eth_tx_packet[3] = BROADCAST_ADDRESS_2; |
eth_tx_packet[4] = BROADCAST_ADDRESS_1; |
eth_tx_packet[5] = BROADCAST_ADDRESS_0; |
|
eth_tx_packet[6] = OWN_MAC_ADDRESS_5; |
eth_tx_packet[7] = OWN_MAC_ADDRESS_4; |
eth_tx_packet[8] = OWN_MAC_ADDRESS_3; |
eth_tx_packet[9] = OWN_MAC_ADDRESS_2; |
eth_tx_packet[10] = OWN_MAC_ADDRESS_1; |
eth_tx_packet[11] = OWN_MAC_ADDRESS_0; |
|
//erase interrupts |
REG32(ETH_BASE + ETH_INT_SOURCE) = ETH_RXC | ETH_TXC | ETH_BUSY | ETH_RXE | ETH_RXB | ETH_TXE | ETH_TXB; |
|
eth_tx_done = 1; |
eth_rx_done = 0; |
eth_rx_len = 0; |
eth_tx_data = ð_tx_packet[HDR_LEN]; |
eth_rx_data = ð_rx_packet[HDR_LEN]; |
} |
|
int eth_send(int length) |
{ |
if (!eth_tx_done) //if previous command not fully processed, bail out |
return -1; |
|
int i; |
|
eth_tx_done = 0; |
eth_tx_packet[12] = length >> 8; |
eth_tx_packet[13] = length; |
|
REG32(ETH_BASE + ETH_TXBD0L) = (( 0x0000FFFF & ( length + HDR_LEN ) ) << 16) | BD_SND; |
|
return length; |
} |
|
void eth_interrupt() |
{ |
unsigned long source = REG32(ETH_BASE + ETH_INT_SOURCE); |
if ( source & ETH_TXB ) |
{ |
eth_tx_done = 1; |
//erase interrupt |
REG32(ETH_BASE + ETH_INT_SOURCE) |= ETH_TXB; |
} |
if ( source & ETH_RXB ) |
{ |
eth_rx_done = 1; |
eth_rx_len = (REG32(ETH_BASE + ETH_RXBD0L) >> 16) - HDR_LEN - CRC_LEN; |
//erase interrupt |
REG32(ETH_BASE + ETH_INT_SOURCE) |= ETH_RXB; |
} |
} |
|
/tick.h
0,0 → 1,4
|
void tick_init(void); |
|
void tick_ack(void); |
/interrupts.c
0,0 → 1,15
|
// Dummy or32 except vectors |
void buserr_except(){} |
void dpf_except(){} |
void ipf_except(){} |
void align_except(){} |
void illegal_except(){} |
void dtlbmiss_except(){} |
void itlbmiss_except(){} |
void range_except(){} |
void syscall_except(){} |
void res1_except(){} |
void trap_except(){} |
void res2_except(){} |
|
/uart.h
0,0 → 1,9
|
#include "../support/uart.h" |
|
void uart_print_str(char *); |
void uart_print_long(unsigned long); |
|
void uart_interrupt(); |
void uart_print_short(unsigned long ul); |
|
/can.c
0,0 → 1,150
#include "../support/board.h" |
#include "../support/support.h" |
#include "can.h" |
|
int can_rx_done, can_tx_done; |
|
int can_rx_rd_ptr; |
int can_rx_wr_ptr; |
int can_rx_buf_overflow; |
|
can_type can_rx_data[CAN_BUF_LEN], can_tx_data; |
|
can_type * can_get(void) |
{ |
if ( !can_rx_done ) |
return NULL; |
|
can_rx_done--; |
|
int tmp; |
tmp = can_rx_rd_ptr; |
|
if (can_rx_rd_ptr < CAN_BUF_LEN-1) |
can_rx_rd_ptr++; |
else |
can_rx_rd_ptr = 0; |
|
return &can_rx_data[tmp]; |
} |
|
void can_init(void) |
{ |
unsigned char sync_jmp, baudrate_presc, timing_seg1, timing_seg2, tripple_samp = 0; |
unsigned char acpt_code, acpt_mask = 0; |
unsigned char clk_div = 0 & CAN_BUS_CLKDIV_MASK; |
|
sync_jmp = 1; |
baudrate_presc = 1; |
timing_seg1 = 11; |
timing_seg2 = 2; |
tripple_samp = 1; |
|
acpt_code = 0x81; |
acpt_mask = 0xFF; |
|
char timing0, timing1 = 0; |
|
timing0 = (sync_jmp << CAN_BUS_TIMING_0_SYNC_JMP_SHIFT) & CAN_BUS_TIMING_0_SYNC_JMP; |
timing0 |= baudrate_presc & CAN_BUS_TIMING_0_BAUD_PRESC; |
|
timing1 = (tripple_samp << CAN_BUS_TIMING_1_TRIPLE_SAMP_SHIFT) & CAN_BUS_TIMING_1_TRIPLE_SAMP; |
timing1 |= (timing_seg2 << CAN_BUS_TIMING_1_TIME_SEG2_SHIFT) & CAN_BUS_TIMING_1_TIME_SEG2; |
timing1 |= timing_seg1 & CAN_BUS_TIMING_1_TIME_SEG1; |
|
REG8(CAN_BASE+CAN_MODE) = CAN_MODE_RESET; |
|
REG8(CAN_BASE+CAN_BUS_TIMING_0) = timing0; |
REG8(CAN_BASE+CAN_BUS_TIMING_1) = timing1; |
|
REG8(CAN_BASE+CAN_ACPT_CODE0) = acpt_code; |
REG8(CAN_BASE+CAN_ACPT_MASK0) = acpt_mask; |
|
REG8(CAN_BASE+CAN_BUS_MODE) &= ~CAN_BUS_MODE_CLOCK_OFF & ~CAN_BUS_MODE_EXTENDED_MODE; |
|
REG8(CAN_BASE+CAN_MODE) &= ~CAN_MODE_RESET; |
REG8(CAN_BASE+CAN_BUS_CLKDIV) = clk_div; |
|
REG8(CAN_BASE+CAN_MODE) |= CAN_MODE_TX_IRQ_EN | CAN_MODE_RECV_IRQ_EN; |
|
can_tx_done = 1; |
can_rx_done = 0; |
can_rx_rd_ptr = 0; |
can_rx_wr_ptr = 0; |
can_rx_buf_overflow = 0; |
} |
|
void can_recv_basic() |
{ |
unsigned char byte0, byte1; |
|
byte0 = REG8(CAN_BASE+CAN_RX_BUF); |
byte1 = REG8(CAN_BASE+CAN_RX_BUF+1); |
|
can_rx_data[can_rx_wr_ptr].data[0] = REG8(CAN_BASE+CAN_RX_BUF+2); |
can_rx_data[can_rx_wr_ptr].data[1] = REG8(CAN_BASE+CAN_RX_BUF+3); |
can_rx_data[can_rx_wr_ptr].data[2] = REG8(CAN_BASE+CAN_RX_BUF+4); |
can_rx_data[can_rx_wr_ptr].data[3] = REG8(CAN_BASE+CAN_RX_BUF+5); |
can_rx_data[can_rx_wr_ptr].data[4] = REG8(CAN_BASE+CAN_RX_BUF+6); |
can_rx_data[can_rx_wr_ptr].data[5] = REG8(CAN_BASE+CAN_RX_BUF+7); |
can_rx_data[can_rx_wr_ptr].data[6] = REG8(CAN_BASE+CAN_RX_BUF+8); |
can_rx_data[can_rx_wr_ptr].data[7] = REG8(CAN_BASE+CAN_RX_BUF+9); |
|
REG8(CAN_BASE+CAN_CMD) = CAN_CMD_RELEASE_BUFFER; |
|
can_rx_data[can_rx_wr_ptr].identifier = (byte0 << 3) | (byte1 >> 5); |
can_rx_data[can_rx_wr_ptr].rtr = byte1 & 0x10; |
can_rx_data[can_rx_wr_ptr].len = byte1 & 0x0F; |
|
if (can_rx_wr_ptr < CAN_BUF_LEN-1) |
can_rx_wr_ptr++; |
else |
can_rx_wr_ptr = 0; |
|
if (can_rx_wr_ptr == can_rx_rd_ptr+1) //buffer overflow |
{ |
can_rx_done = 1; |
can_rx_buf_overflow++; |
} |
else |
can_rx_done++; |
} |
|
int can_send_basic() |
{ |
if (!can_tx_done) //if previous command not fully processed, bail out |
return -1; |
|
can_tx_done = 0; |
REG8(CAN_BASE+CAN_TX_BUF) = can_tx_data.identifier >> 3; |
REG8(CAN_BASE+CAN_TX_BUF+1) = (can_tx_data.identifier << 5) | ((can_tx_data.rtr << 4) & 0x10) | (can_tx_data.len & 0x0F); |
|
REG8(CAN_BASE+CAN_TX_BUF+2) = can_tx_data.data[0]; |
REG8(CAN_BASE+CAN_TX_BUF+3) = can_tx_data.data[1]; |
REG8(CAN_BASE+CAN_TX_BUF+4) = can_tx_data.data[2]; |
REG8(CAN_BASE+CAN_TX_BUF+5) = can_tx_data.data[3]; |
REG8(CAN_BASE+CAN_TX_BUF+6) = can_tx_data.data[4]; |
REG8(CAN_BASE+CAN_TX_BUF+7) = can_tx_data.data[5]; |
REG8(CAN_BASE+CAN_TX_BUF+8) = can_tx_data.data[6]; |
REG8(CAN_BASE+CAN_TX_BUF+9) = can_tx_data.data[7]; |
|
REG8(CAN_BASE+CAN_CMD) = CAN_CMD_TX_REQ; |
|
return can_tx_data.len; |
} |
|
void can_irq(void) |
{ |
unsigned char irq_req, rx_done; |
irq_req = REG8(CAN_BASE+IRQ_READ); |
rx_done = irq_req & CAN_IRQ_READ_RX; |
can_tx_done = irq_req & CAN_IRQ_READ_TX; |
if (rx_done) |
can_recv_basic(); |
} |
|
void can_abort(void) |
{ |
REG8(CAN_BASE+CAN_CMD) = CAN_CMD_ABORT_TX; |
} |
|
/i2c.h
0,0 → 1,62
|
struct i2c_type |
{ |
unsigned char address; |
unsigned char pointer; |
unsigned short data; |
}; |
|
struct i2c_mode |
{ |
unsigned char read_write; |
unsigned char byte_word; |
unsigned char ptr_set; |
}; |
|
typedef struct i2c_type i2c_type; |
typedef struct i2c_mode i2c_mode; |
|
#define I2C_BUF_LEN 10 |
|
void i2c_init(void); |
void i2c_irq(void); |
|
i2c_type * i2c_get(void); //return pointer to first non read received data |
|
void i2c_set_ack_lvl(int ack_lvl, int final_ack_lvl); |
int i2c_trans(i2c_mode * mode, i2c_type * data); //return (-1) or length (still processing previous) or asserted |
|
#define I2C_PRESC_LO 0x00 |
#define I2C_PRESC_HI 0x01 |
|
#define I2C_CTR 0x02 |
|
#define I2C_TXR 0x03 |
#define I2C_RXR 0x03 |
|
#define I2C_CR 0x04 |
#define I2C_SR 0x04 |
|
|
//BITS |
#define I2C_CTR_EN 0x80 |
#define I2C_CTR_IRQ_EN 0x40 |
|
#define I2C_TXR_ADR 0xFE |
#define I2C_TXR_W 0x00 |
#define I2C_TXR_R 0x01 |
|
#define I2C_CR_STA 0x80 |
#define I2C_CR_STO 0x40 |
#define I2C_CR_RD 0x20 |
#define I2C_CR_WR 0x10 |
#define I2C_CR_ACK 0x00 |
#define I2C_CR_NACK 0x08 |
#define I2C_CR_CLR_IRQ 0x01 |
|
#define I2C_SR_R_ACK 0x80 |
#define I2C_SR_BUSY 0x40 |
#define I2C_SR_ARB_LOST 0x20 |
#define I2C_SR_TX_BUSY 0x02 |
#define I2C_SR_IRQ_FLAG 0x01 |
|
/eth.h
0,0 → 1,111
|
void eth_init(); |
void eth_interrupt(); |
void eth_recv_ack(void); |
|
int eth_send(int length); //return (-1) or length (still processing previous) or asserted |
|
#define ETH_MODER 0x00 |
#define ETH_INT_SOURCE 0x04 |
#define ETH_INT_MASK 0x08 |
#define ETH_IPGT 0x0C |
#define ETH_IPGR1 0x10 |
#define ETH_IPGR2 0x14 |
#define ETH_PACKETLEN 0x18 |
#define ETH_COLLCONF 0x1C |
#define ETH_TX_BD_NUM 0x20 |
#define ETH_CTRLMODER 0x24 |
#define ETH_MIIMODER 0x28 |
#define ETH_MIICOMMAND 0x2C |
#define ETH_MIIADDRESS 0x30 |
#define ETH_MIITX_DATA 0x34 |
#define ETH_MIIRX_DATA 0x38 |
#define ETH_MIISTATUS 0x3C |
#define ETH_MAC_ADDR0 0x40 |
#define ETH_MAC_ADDR1 0x44 |
#define ETH_HASH0_ADR 0x48 |
#define ETH_HASH1_ADR 0x4C |
#define ETH_TXCTRL 0x50 |
|
#define ETH_TXBD0H 0x404 |
#define ETH_TXBD0L 0x400 |
|
#define ETH_RXBD0H 0x604 //this depends on TX_BD_NUM but this is the standard value |
#define ETH_RXBD0L 0x600 //this depends on TX_BD_NUM but this is the standard value |
|
//MODER BITS |
#define ETH_RECSMALL 0x00010000 |
#define ETH_PAD 0x00008000 |
#define ETH_HUGEN 0x00004000 |
#define ETH_CRCEN 0x00002000 |
#define ETH_DLYCRCEN 0x00001000 |
#define ETH_FULLD 0x00000400 |
#define ETH_EXDFREN 0x00000200 |
#define ETH_NOBCKOF 0x00000100 |
#define ETH_LOOPBCK 0x00000080 |
#define ETH_IFG 0x00000040 |
#define ETH_PRO 0x00000020 |
#define ETH_IAM 0x00000010 |
#define ETH_BRO 0x00000008 |
#define ETH_NOPRE 0x00000004 |
#define ETH_TXEN 0x00000002 |
#define ETH_RXEN 0x00000001 |
|
//INTERRUPTS BITS |
#define ETH_RXC 0x00000040 |
#define ETH_TXC 0x00000020 |
#define ETH_BUSY 0x00000010 |
#define ETH_RXE 0x00000008 |
#define ETH_RXB 0x00000004 |
#define ETH_TXE 0x00000002 |
#define ETH_TXB 0x00000001 |
|
//BUFFER DESCRIPTOR BITS |
#define ETH_RXBD_EMPTY 0x00008000 |
#define ETH_RXBD_IRQ 0x00004000 |
#define ETH_RXBD_WRAP 0x00002000 |
#define ETH_RXBD_CF 0x00000100 |
#define ETH_RXBD_MISS 0x00000080 |
#define ETH_RXBD_OR 0x00000040 |
#define ETH_RXBD_IS 0x00000020 |
#define ETH_RXBD_DN 0x00000010 |
#define ETH_RXBD_TL 0x00000008 |
#define ETH_RXBD_SF 0x00000004 |
#define ETH_RXBD_CRC 0x00000002 |
#define ETH_RXBD_LC 0x00000001 |
|
#define ETH_TXBD_READY 0x00008000 |
#define ETH_TXBD_IRQ 0x00004000 |
#define ETH_TXBD_WRAP 0x00002000 |
#define ETH_TXBD_PAD 0x00001000 |
#define ETH_TXBD_CRC 0x00000800 |
#define ETH_TXBD_UR 0x00000100 |
#define ETH_TXBD_RL 0x00000008 |
#define ETH_TXBD_LC 0x00000004 |
#define ETH_TXBD_DF 0x00000002 |
#define ETH_TXBD_CS 0x00000001 |
|
//user defines |
#define OWN_MAC_ADDRESS_5 0x55 |
#define OWN_MAC_ADDRESS_4 0x47 |
#define OWN_MAC_ADDRESS_3 0x34 |
#define OWN_MAC_ADDRESS_2 0x22 |
#define OWN_MAC_ADDRESS_1 0x88 |
#define OWN_MAC_ADDRESS_0 0x92 |
|
#define BROADCAST_ADDRESS_5 0xFF |
#define BROADCAST_ADDRESS_4 0xFF |
#define BROADCAST_ADDRESS_3 0xFF |
#define BROADCAST_ADDRESS_2 0xFF |
#define BROADCAST_ADDRESS_1 0xFF |
#define BROADCAST_ADDRESS_0 0xFF |
|
#define HDR_LEN 14 |
#define CRC_LEN 4 |
#define BD_SND ( ETH_TXBD_READY | ETH_TXBD_IRQ | ETH_TXBD_WRAP | ETH_TXBD_PAD | ETH_TXBD_CRC ) |
#define RX_READY ( ETH_RXBD_EMPTY | ETH_RXBD_IRQ | ETH_RXBD_WRAP ) |
#define TX_READY ( ETH_TXBD_IRQ | ETH_TXBD_WRAP | ETH_TXBD_PAD | ETH_TXBD_CRC ) |
|
//~user defines |
|
|
/can.h
0,0 → 1,158
|
struct can_type |
{ |
unsigned char rtr; |
unsigned char len; |
unsigned short identifier; |
unsigned char data[8]; |
}; |
|
typedef struct can_type can_type; |
|
#define CAN_BUF_LEN 10 |
|
void can_init(void); |
void can_irq(void); |
|
can_type * can_get(void); //return pointer to first non read received data |
|
int can_send_basic(); //return (-1) or length (still processing previous) or asserted |
void can_abort(void); |
|
//BOTH MODES |
#define CAN_MODE 0x00 |
#define CAN_CMD 0x01 |
#define CAN_STATUS 0x02 |
#define IRQ_READ 0x03 |
|
#define CAN_ACPT_CODE0 0x04 //only writable while in reset mode |
#define CAN_ACPT_MASK0 0x05 //only writable while in reset mode |
|
#define CAN_BUS_TIMING_0 0x06 //only writable while in reset mode |
#define CAN_BUS_TIMING_1 0x07 //only writable while in reset mode |
|
#define CAN_BUS_CLKDIV 0x1F //only writable while NOT in reset mode |
|
#define CAN_TX_BUF 0x0A //only accessable while NOT in reset mode |
#define CAN_TX_LEN 10 |
|
#define CAN_RX_BUF 0x14 //free read access for basic mode |
#define CAN_RX_LEN 10 |
|
//only accessable while in reset mode |
#define CAN_BUS_MODE 0x1F |
|
|
//EXTENDED MODE ONLY |
//only for extended mode & only accessable while in reset mode |
#define CAN_IRQ_EN_EXT 0x04 //also writable if NOT in reset mode |
|
//read only regs |
#define CAN_ARBIT_LOSS_CNT 0x0B //cnt of arbitration loss |
#define CAN_ERROR_CAPTURE_CODE 0x0C |
#define CAN_RX_MSG_CNT 0x1D |
//~read only regs |
|
#define CAN_ERROR_WARN_LIMIT 0x0D |
|
#define CAN_RX_ERR_CNT 0x0E |
#define CAN_TX_ERR_CNT 0x0F |
|
#define CAN_ACPT_CODE0_EXT 0x10 //also writable if NOT in reset mode |
#define CAN_ACPT_CODE1 0x11 |
#define CAN_ACPT_CODE2 0x12 |
#define CAN_ACPT_CODE3 0x13 |
|
#define CAN_ACPT_MASK0_EXT 0x14 //also writable if NOT in reset mode |
#define CAN_ACPT_MASK1 0x15 |
#define CAN_ACPT_MASK2 0x16 |
#define CAN_ACPT_MASK3 0x17 |
|
#define CAN_TX_BUF_EXT 0x10 //accessable if transmit_buffer_status=1 |
#define CAN_TX_LEN_EXT 13 //ignores reset mode |
|
#define CAN_RX_BUF_EXT 0x10 //read access only in NOT reset mode |
#define CAN_RX_LEN_EXT 13 |
|
|
//BITS DEFINITIONS |
|
//BASIC MODE |
#define CAN_MODE_RESET 0x01 |
#define CAN_MODE_LISTEN_ONLY_BASIC 0x20 |
#define CAN_MODE_RECV_IRQ_EN 0x02 |
#define CAN_MODE_TX_IRQ_EN 0x04 |
#define CAN_MODE_ERROR_IRQ_EN 0x08 |
#define CAN_MODE_OVERRUN_IRQ_EN 0x10 |
//EXTENDED MODE |
#define CAN_MODE_LISTEN_ONLY_EXT 0x02 |
#define CAN_MODE_SELF_TEST_MODE 0x04 |
#define CAN_MODE_ACPT_FILTER_MODE 0x08 |
|
//CMD |
#define CAN_CMD_CLR_DATA_OVERRUN 0x08 |
#define CAN_CMD_RELEASE_BUFFER 0x04 |
#define CAN_CMD_TX_REQ 0x11 |
#define CAN_CMD_ABORT_TX 0x02 |
|
//STATUS |
#define CAN_STATUS_NODE_BUS_OFF 0x80 |
#define CAN_STATUS_ERROR 0x40 |
#define CAN_STATUS_TX 0x20 |
#define CAN_STATUS_RX 0x10 |
#define CAN_STATUS_TX_COMPLETE 0x08 |
#define CAN_STATUS_TX_BUF 0x04 |
#define CAN_STATUS_OVERRUN 0x02 |
#define CAN_STATUS_RX_BUF 0x01 |
|
//IRQ READ |
#define CAN_IRQ_READ_BUS_ERROR 0x80 |
#define CAN_IRQ_READ_ARBIT_LOST 0x40 |
#define CAN_IRQ_READ_ERROR_PASSIV 0x20 |
#define CAN_IRQ_READ_OVERRUN 0x08 |
#define CAN_IRQ_READ_ERROR 0x04 |
#define CAN_IRQ_READ_TX 0x02 |
#define CAN_IRQ_READ_RX 0x01 |
|
//BUS_TIMING_0 |
#define CAN_BUS_TIMING_0_SYNC_JMP_SHIFT 6 |
#define CAN_BUS_TIMING_0_SYNC_JMP 0xC0 |
#define CAN_BUS_TIMING_0_BAUD_PRESC 0x3F |
|
//BUS_TIMING_1 |
#define CAN_BUS_TIMING_1_TRIPLE_SAMP_SHIFT 7 |
#define CAN_BUS_TIMING_1_TRIPLE_SAMP 0x80 |
#define CAN_BUS_TIMING_1_TIME_SEG2_SHIFT 4 |
#define CAN_BUS_TIMING_1_TIME_SEG2 0x70 |
#define CAN_BUS_TIMING_1_TIME_SEG1 0x0F |
|
//CLKDIV |
//only writable while NOT in reset mode |
#define CAN_BUS_CLKDIV_MASK 0x07 |
|
|
//EXTENDED MODE ONLY |
//CLKMODE |
//only writable while in reset mode |
#define CAN_BUS_MODE_CLOCK_OFF 0x08 |
#define CAN_BUS_MODE_EXTENDED_MODE 0x80 |
|
//EXTENDED MODE IRQ |
#define CAN_IRQ_EN_EXT_BUS_ERROR 0x80 |
#define CAN_IRQ_EN_EXT_ARBIT_LOST 0x40 |
#define CAN_IRQ_EN_EXT_ERROR_PASSIV 0x20 |
#define CAN_IRQ_EN_EXT_OVERRUN 0x08 |
#define CAN_IRQ_EN_EXT_ERROR 0x04 |
#define CAN_IRQ_EN_EXT_TX 0x02 |
#define CAN_IRQ_EN_EXT_RX 0x01 |
|
//EXTENDED ERROR CODES |
#define CAN_ERROR_CAPTURE_CODE_TYPE_SHIFT 6 |
#define CAN_ERROR_CAPTURE_CODE_TYPE 0xC0 |
#define CAN_ERROR_CAPTURE_CODE_TYPE_BIT 0x0 |
#define CAN_ERROR_CAPTURE_CODE_TYPE_FORM 0x1 |
#define CAN_ERROR_CAPTURE_CODE_TYPE_STUFF 0x2 |
#define CAN_ERROR_CAPTURE_CODE_TYPE_OTHER 0x3 |
#define CAN_ERROR_CAPTURE_CODE_DIR 0x40 //1 = TX | 0 = RX |
#define CAN_ERROR_CAPTURE_CODE_SEG 0x1F |
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/tick.c
0,0 → 1,31
#include "../support/spr_defs.h" |
#include "../support/support.h" |
#include "tick.h" |
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int tick_int; |
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void tick_ack(void) |
{ |
tick_int--; |
} |
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void tick_init(void) |
{ |
mtspr(SPR_TTMR, 25000000 & SPR_TTMR_PERIOD); //1s |
// mtspr(SPR_TTMR, 125000 & SPR_TTMR_PERIOD); //5ms |
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mtspr(SPR_TTMR, mfspr(SPR_TTMR) | SPR_TTMR_RT | SPR_TTMR_IE); //restart after match, enable interrupt |
mtspr(SPR_TTMR, mfspr(SPR_TTMR) & ~(SPR_TTMR_IP)); //clears interrupt |
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//set OR1200 to accept exceptions |
mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_TEE); |
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tick_int = 0; |
} |
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void tick_except(void) |
{ |
tick_int++; |
mtspr(SPR_TTMR, mfspr(SPR_TTMR) & ~(SPR_TTMR_IP)); //clears interrupt |
} |
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/uart.c
0,0 → 1,68
#include "../support/board.h" |
#include "../support/support.h" |
#include "../support/uart.h" |
#include "uart.h" |
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void uart_interrupt() |
{ |
char lala; |
unsigned char interrupt_id; |
interrupt_id = REG8(UART_BASE + UART_IIR); |
if ( interrupt_id & UART_IIR_RDI ) |
{ |
lala = uart_getc(); |
uart_putc(lala+1); |
} |
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} |
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void uart_print_str(char *p) |
{ |
while(*p != 0) { |
uart_putc(*p); |
p++; |
} |
} |
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void uart_print_long(unsigned long ul) |
{ |
int i; |
char c; |
|
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uart_print_str("0x"); |
for(i=0; i<8; i++) { |
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c = (char) (ul>>((7-i)*4)) & 0xf; |
if(c >= 0x0 && c<=0x9) |
c += '0'; |
else |
c += 'a' - 10; |
uart_putc(c); |
} |
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} |
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void uart_print_short(unsigned long ul) |
{ |
int i; |
char c; |
char flag=0; |
|
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uart_print_str("0x"); |
for(i=0; i<8; i++) { |
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c = (char) (ul>>((7-i)*4)) & 0xf; |
if(c >= 0x0 && c<=0x9) |
c += '0'; |
else |
c += 'a' - 10; |
if ((c != '0') || (i==7)) |
flag=1; |
if(flag) |
uart_putc(c); |
} |
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} |
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/Makefile
0,0 → 1,25
all: libdrivers.a |
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libdrivers.a: eth.o uart.o interrupts.o can.o i2c.o tick.o |
$(OR32_TOOL_PREFIX)-ar cru libdrivers.a eth.o uart.o interrupts.o can.o i2c.o tick.o |
$(OR32_TOOL_PREFIX)-ranlib libdrivers.a |
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eth.o: eth.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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uart.o: uart.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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interrupts.o: interrupts.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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can.o: can.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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i2c.o: i2c.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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tick.o: tick.c |
$(OR32_TOOL_PREFIX)-gcc $(GCC_OPT) $? -c -o $@ |
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include ../support/Makefile.inc |
/i2c.c
0,0 → 1,166
#include "../support/board.h" |
#include "../support/support.h" |
#include "i2c.h" |
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int i2c_rd_done, i2c_wr_done; |
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int i2c_pending_write; |
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int i2c_rd_ptr, i2c_wr_ptr; |
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int i2c_buf_overflow; |
i2c_type i2c_data[I2C_BUF_LEN]; |
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unsigned char start, pointer_write, write_hbyte, write_lbyte, read_hbyte, read_lbyte; |
unsigned char cmd_list[5]; |
unsigned char dat_list[5]; |
int i2c_index; |
int i2c_end; |
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i2c_type * i2c_get(void) |
{ |
if ( !i2c_rd_done ) |
return NULL; |
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i2c_rd_done--; |
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int tmp; |
tmp = i2c_rd_ptr; |
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if (i2c_rd_ptr < I2C_BUF_LEN-1) |
i2c_rd_ptr++; |
else |
i2c_rd_ptr = 0; |
|
return &i2c_data[tmp]; |
} |
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void i2c_init(void) |
{ |
REG8(I2C_BASE+I2C_PRESC_HI) = 0x00; |
REG8(I2C_BASE+I2C_PRESC_LO) = 49; //100kHz |
REG8(I2C_BASE+I2C_CTR) = I2C_CTR_EN | I2C_CTR_IRQ_EN; |
i2c_rd_done = 0; |
i2c_wr_done = 0; |
i2c_index = 0; |
i2c_wr_ptr = 0; |
i2c_rd_ptr = 0; |
i2c_buf_overflow = 0; |
} |
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void i2c_set_ack_lvl(int ack_lvl, int final_ack_lvl) |
{ |
int ack, final_ack; |
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ack = ( ack_lvl ) ? I2C_CR_NACK : I2C_CR_ACK; |
final_ack = ( final_ack_lvl ) ? I2C_CR_NACK : I2C_CR_ACK; |
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start = I2C_CR_STA | I2C_CR_WR | ack; |
pointer_write = I2C_CR_WR | ack; |
write_hbyte = I2C_CR_WR | ack; |
write_lbyte = I2C_CR_WR | I2C_CR_STO | final_ack; |
read_hbyte = I2C_CR_RD | ack; |
read_lbyte = I2C_CR_RD | I2C_CR_STO | final_ack; |
} |
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void i2c_byte_transfer(void) |
{ |
if ( i2c_index > 0 ) |
if ( cmd_list[i2c_index-1] == read_hbyte ) |
i2c_data[i2c_wr_ptr].data = (REG8(I2C_BASE+I2C_RXR) << 8) & 0xFF00; |
|
REG8(I2C_BASE+I2C_TXR) = dat_list[i2c_index]; |
REG8(I2C_BASE+I2C_CR) = cmd_list[i2c_index]; |
|
i2c_index++; |
} |
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void i2c_irq(void) |
{ |
REG8(I2C_BASE+I2C_CR) = I2C_CR_CLR_IRQ; |
if (i2c_index <= i2c_end ) |
i2c_byte_transfer(); |
else |
{ |
if ( cmd_list[i2c_index-1] == read_lbyte ) |
i2c_data[i2c_wr_ptr].data |= REG8(I2C_BASE+I2C_RXR); |
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i2c_index = 0; |
|
if ( i2c_pending_write ) |
i2c_wr_done = 1; |
else |
{ |
if (i2c_wr_ptr < I2C_BUF_LEN-1) |
i2c_wr_ptr++; |
else |
i2c_wr_ptr = 0; |
|
if (i2c_wr_ptr == i2c_rd_ptr+1) |
{ |
i2c_rd_done = 1; |
i2c_buf_overflow++; |
} |
else |
i2c_rd_done++; |
} |
} |
} |
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int i2c_trans(i2c_mode * mode, i2c_type * data) |
{ |
if ( i2c_index != 0 ) //if previous command not fully processed, bail out |
return -1; |
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i2c_wr_done = 0; |
|
int i = 0; |
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if ( mode->ptr_set || mode->read_write ) //start conditions with pointer set: (write always set ptr) |
{ |
dat_list[i] = (data->address << 1) & I2C_TXR_ADR; |
dat_list[i] |= I2C_TXR_W; |
cmd_list[i++] = start; |
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dat_list[i] = data->pointer; |
cmd_list[i++] = pointer_write; |
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if ( !mode->read_write ) //REstart for read, NO-REstart for write |
{ |
dat_list[i] = (data->address << 1) & I2C_TXR_ADR; |
dat_list[i] |= I2C_TXR_R; |
cmd_list[i++] = start; |
} |
} |
else //start conditions with NO pointer set (read only): ONE start |
{ |
dat_list[i] = (data->address << 1) & I2C_TXR_ADR; |
dat_list[i] |= I2C_TXR_R; |
cmd_list[i++] = start; |
} |
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if ( mode->byte_word ) //read/write high byte |
{ |
dat_list[i] = data->data >> 8; |
cmd_list[i++] = (mode->read_write) ? write_hbyte : read_hbyte; |
} |
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dat_list[i] = data->data; //read/write low byte |
cmd_list[i] = (mode->read_write) ? write_lbyte : read_lbyte; |
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i2c_end = i; |
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if ( !mode->read_write ) //set data to 0 for read, avoid or implications ((short)data |= byte) |
{ |
i2c_data[i2c_wr_ptr] = *data; |
i2c_data[i2c_wr_ptr].data = 0x0000; |
} |
|
i2c_pending_write = mode->read_write; |
|
i2c_index = 0; |
i2c_byte_transfer(); |
|
return mode->read_write+1; |
} |
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