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[/] [test_project/] [trunk/] [sw/] [uart/] [uart.c] - Diff between revs 25 and 52

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Rev 25	Rev 52
Line 1...	Line 1...
`#include "../support/support.h"`	`#include "../support/support.h"`
`#include "../support/board.h"`	`#include "../support/board.h"`
`#include "uart.h"`	`#include "../support/uart.h"`

	`void uart_print_str(char *);`
	`void uart_print_long(unsigned long);`

`#define BOTH_EMPTY (UART_LSR_TEMT \| UART_LSR_THRE)`	`// Dummy or32 except vectors`
	`void buserr_except(){}`
	`void dpf_except(){}`
	`void ipf_except(){}`
	`void lpint_except(){}`
	`void align_except(){}`
	`void illegal_except(){}`
	`void hpint_except(){}`
	`void dtlbmiss_except(){}`
	`void itlbmiss_except(){}`
	`void range_except(){}`
	`void syscall_except(){}`
	`void res1_except(){}`
	`void trap_except(){}`
	`void res2_except(){}`

`#define WAIT_FOR_XMITR \`
`do { \`
`lsr = REG8(UART_BASE + UART_LSR); \`
`} while ((lsr & BOTH_EMPTY) != BOTH_EMPTY)`

`#define WAIT_FOR_THRE \`
`do { \`
`lsr = REG8(UART_BASE + UART_LSR); \`
`} while ((lsr & UART_LSR_THRE) != UART_LSR_THRE)`

`#define CHECK_FOR_CHAR (REG8(UART_BASE + UART_LSR) & UART_LSR_DR)`

`#define WAIT_FOR_CHAR \`
`do { \`
`lsr = REG8(UART_BASE + UART_LSR); \`
`} while ((lsr & UART_LSR_DR) != UART_LSR_DR)`

`#define UART_TX_BUFF_LEN 32`
`#define UART_TX_BUFF_MASK (UART_TX_BUFF_LEN -1)`

`char tx_buff[UART_TX_BUFF_LEN];`
`volatile int tx_level, rx_level;`

`void uart_init(void)`
`{`
`int devisor;`

`/* Reset receiver and transmiter */`
`REG8(UART_BASE + UART_FCR) = UART_FCR_ENABLE_FIFO \| UART_FCR_CLEAR_RCVR \| UART_FCR_CLEAR_XMIT \| UART_FCR_TRIGGER_14;`

`/* Disable all interrupts */`
`REG8(UART_BASE + UART_IER) = 0x00;`

`/* Set 8 bit char, 1 stop bit, no parity */`
`REG8(UART_BASE + UART_LCR) = UART_LCR_WLEN8 & ~(UART_LCR_STOP \| UART_LCR_PARITY);`

`/* Set baud rate */`
`devisor = IN_CLK/(16 * UART_BAUD_RATE);`
`REG8(UART_BASE + UART_LCR) \|= UART_LCR_DLAB;`
`REG8(UART_BASE + UART_DLL) = devisor & 0x000000ff;`
`REG8(UART_BASE + UART_DLM) = (devisor >> 8) & 0x000000ff;`
`REG8(UART_BASE + UART_LCR) &= ~(UART_LCR_DLAB);`

`return;`
`}`

`void uart_putc(char c)`
`{`
`unsigned char lsr;`

`WAIT_FOR_THRE;`
`REG8(UART_BASE + UART_TX) = c;`
`if(c == '\n') {`
`WAIT_FOR_THRE;`
`REG8(UART_BASE + UART_TX) = '\r';`
`}`
`WAIT_FOR_XMITR;`
`}`

`void uart_print_str(char *p)`	`void uart_print_str(char *p)`
`{`	`{`
`while(*p != 0) {`	`while(*p != 0) {`
`uart_putc(*p);`	`uart_putc(*p);`
`p++;`	`p++;`
`}`	`}`
`}`	`}`


`void uart_print_long(unsigned long ul)`	`void uart_print_long(unsigned long ul)`
`{`	`{`
`int i;`	`int i;`
`char c;`	`char c;`

Line 90...	Line 47...
`uart_putc(c);`	`uart_putc(c);`
`}`	`}`

`}`	`}`


`void uart_print_short(unsigned long ul)`	`void uart_print_short(unsigned long ul)`
`{`	`{`
`int i;`	`int i;`
`char c;`	`char c;`
`char flag=0;`	`char flag=0;`
Line 116...	Line 72...

`}`	`}`



`char uart_getc()`
`{`
`unsigned char lsr;`
`char c;`

`WAIT_FOR_CHAR;`
`c = REG8(UART_BASE + UART_RX);`
`return c;`
`}`


`int main()`	`int main()`
`{`	`{`
`uart_init();`	`uart_init();`

`/* We can't use printf because in this simple example`	`/* We can't use printf because in this simple example`
`we don't link C library. */`	`we don't link C library. */`
`uart_print_str("Hello World.\n\r");`	`uart_print_str("Hello World.\n\r");`

`report(0xdeaddead);`	`report(0xdeaddead);`
`exit(0);`	`or32_exit(0);`
`}`	`}`

`No newline at end of file`	`No newline at end of file`

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[/] [test_project/] [trunk/] [sw/] [uart/] [uart.c] - Diff between revs 25 and 52