300f64c99a
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14768 a1c6a512-1295-4272-9138-f99709370657
142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
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* (C) Copyright 2007 Catalin Patulea <cat@vv.carleton.ca>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include "config.h"
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#include "cpu.h"
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#include "system.h"
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/* UART 0/1 */
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#define IO_UART0_DTRR 0x0300
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#define IO_UART0_BRSR 0x0302
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#define IO_UART0_MSR 0x0304
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#define IO_UART0_RFCR 0x0306
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#define IO_UART0_TFCR 0x0308
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#define IO_UART0_LCR 0x030A
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#define IO_UART0_SR 0x030C
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#define IO_UART1_DTRR 0x0380
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#define IO_UART1_BRSR 0x0382
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#define IO_UART1_MSR 0x0384
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#define IO_UART1_RFCR 0x0386
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#define IO_UART1_TFCR 0x0388
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#define IO_UART1_LCR 0x038A
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#define IO_UART1_SR 0x038C
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#define CONFIG_UART_BRSR 87
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void do_checksums(char *data, int len, char *xor, char *add)
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{
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int i;
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*xor = data[0];
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*add = data[0];
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for(i=1;i<len;i++)
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{
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*xor ^= data[i];
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*add += data[i];
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}
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}
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void uartSetup(void) {
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// 8-N-1
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outw(0x8000, IO_UART1_MSR);
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outw(CONFIG_UART_BRSR, IO_UART1_BRSR);
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}
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void uartPutc(char ch) {
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// Wait for room in FIFO
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while ((inw(IO_UART1_TFCR) & 0x3f) >= 0x20);
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// Write character
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outw(ch, IO_UART1_DTRR);
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}
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// Unsigned integer to ASCII hexadecimal conversion
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void uartPutHex(unsigned int n) {
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unsigned int i;
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for (i = 8; i != 0; i--) {
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unsigned int digit = n >> 28;
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uartPutc(digit >= 10 ? digit - 10 + 'A' : digit + '0');
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n <<= 4;
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}
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}
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void uartPuts(const char *str) {
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char ch;
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while ((ch = *str++) != '\0') {
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uartPutc(ch);
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}
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}
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void uartGets(char *str, unsigned int size) {
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for (;;) {
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char ch;
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// Wait for FIFO to contain something
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while ((inw(IO_UART1_RFCR) & 0x3f) == 0);
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// Read character
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ch = (char)inw(IO_UART1_DTRR);
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// Echo character back
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outw(ch, IO_UART1_DTRR);
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// If CR, also echo LF, null-terminate, and return
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if (ch == '\r') {
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outw('\n', IO_UART1_DTRR);
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if (size) {
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*str++ = '\0';
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}
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return;
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}
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// Append to buffer
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if (size) {
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*str++ = ch;
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--size;
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}
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}
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}
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int uartPollch(unsigned int ticks) {
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while (ticks--) {
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if (inw(IO_UART1_RFCR) & 0x3f) {
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return inw(IO_UART1_DTRR) & 0xff;
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}
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}
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return -1;
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}
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bool uartAvailable(void)
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{
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return (inw(IO_UART1_RFCR) & 0x3f)?true:false;
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}
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void uartHeartbeat(void)
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{
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char data[5] = {0x11, 0x30, 0x11^0x30, 0x11+0x30, '\0'};
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uartPuts(data);
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}
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void uartSendData(char* data, int len)
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{
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int i;
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for(i=0;i<len;i++)
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uartPutc(data[i]);
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}
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