mirror of
git://projects.qi-hardware.com/xburst-tools.git
synced 2024-11-30 03:07:10 +02:00
90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
#include "jz4740.h"
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#include "configs.h"
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void serial_putc (const char c)
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{
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volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR);
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volatile u8 *uart_tdr = (volatile u8 *)(UART_BASE + OFF_TDR);
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if (c == '\n') serial_putc ('\r');
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/* Wait for fifo to shift out some bytes */
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while ( !((*uart_lsr & (UART_LSR_TDRQ | UART_LSR_TEMT)) == 0x60) );
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*uart_tdr = (u8)c;
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}
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void serial_puts (const char *s)
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{
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while (*s) {
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serial_putc (*s++);
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}
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}
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int serial_getc (void)
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{
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volatile u8 *uart_rdr = (volatile u8 *)(UART_BASE + OFF_RDR);
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while (!serial_tstc());
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return *uart_rdr;
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}
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int serial_tstc (void)
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{
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volatile u8 *uart_lsr = (volatile u8 *)(UART_BASE + OFF_LSR);
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if (*uart_lsr & UART_LSR_DR) {
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/* Data in rfifo */
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return (1);
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}
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return 0;
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}
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void serial_init(void)
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{
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volatile u8 *uart_fcr = (volatile u8 *)(UART_BASE + OFF_FCR);
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volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR);
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volatile u8 *uart_ier = (volatile u8 *)(UART_BASE + OFF_IER);
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volatile u8 *uart_sircr = (volatile u8 *)(UART_BASE + OFF_SIRCR);
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/* Disable port interrupts while changing hardware */
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*uart_ier = 0;
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/* Disable UART unit function */
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*uart_fcr = ~UART_FCR_UUE;
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/* Set both receiver and transmitter in UART mode (not SIR) */
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*uart_sircr = ~(SIRCR_RSIRE | SIRCR_TSIRE);
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/* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
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*uart_lcr = UART_LCR_WLEN_8 | UART_LCR_STOP_1;
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/* Set baud rate */
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if ( CPU_ID == 0x4740 )
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serial_setbrg_4740();
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else
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serial_setbrg_4750();
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/* Enable UART unit, enable and clear FIFO */
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*uart_fcr = UART_FCR_UUE | UART_FCR_FE | UART_FCR_TFLS | UART_FCR_RFLS;
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}
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void serial_put_hex(unsigned int d)
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{
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unsigned char c[12];
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char i;
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for(i = 0; i < 8;i++)
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{
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c[i] = (d >> ((7 - i) * 4)) & 0xf;
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if(c[i] < 10)
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c[i] += 0x30;
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else
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c[i] += (0x41 - 10);
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}
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c[8] = '\n';
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c[9] = 0;
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serial_puts(c);
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}
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