uart driver (which the buttons need) and button test code in the bootloader

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14768 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 173 insertions, 0 deletions

diff --git a/firmware/target/arm/olympus/mrobe-500/button-mr500.c b/firmware/target/arm/olympus/mrobe-500/button-mr500.c
index 388dbf0689..f85eeca912 100644
--- a/firmware/target/arm/olympus/mrobe-500/button-mr500.c
+++ b/firmware/target/arm/olympus/mrobe-500/button-mr500.c
@@ -26,6 +26,7 @@
 #include "adc.h"
 #include "system.h"
 #include "backlight-target.h"
+#include "uart-target.h"
 
 #define BUTTON_TIMEOUT 50
 void button_init_device(void)
diff --git a/firmware/target/arm/olympus/mrobe-500/uart-mr500.c b/firmware/target/arm/olympus/mrobe-500/uart-mr500.c
new file mode 100644
index 0000000000..f8208f8717
--- /dev/null
+++ b/firmware/target/arm/olympus/mrobe-500/uart-mr500.c
@@ -0,0 +1,142 @@
+/*
+ * (C) Copyright 2007 Catalin Patulea <cat@vv.carleton.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+#include "config.h"
+#include "cpu.h"
+#include "system.h"
+
+/* UART 0/1 */
+#define IO_UART0_DTRR             0x0300
+#define IO_UART0_BRSR             0x0302
+#define IO_UART0_MSR              0x0304
+#define IO_UART0_RFCR             0x0306
+#define IO_UART0_TFCR             0x0308
+#define IO_UART0_LCR              0x030A
+#define IO_UART0_SR               0x030C
+
+#define IO_UART1_DTRR             0x0380
+#define IO_UART1_BRSR             0x0382
+#define IO_UART1_MSR              0x0384
+#define IO_UART1_RFCR             0x0386
+#define IO_UART1_TFCR             0x0388
+#define IO_UART1_LCR              0x038A
+#define IO_UART1_SR               0x038C
+#define CONFIG_UART_BRSR            87
+
+void do_checksums(char *data, int len, char *xor, char *add)
+{
+    int i;
+    *xor = data[0];
+    *add = data[0];
+    for(i=1;i<len;i++)
+    {
+        *xor ^= data[i];
+        *add += data[i];
+    }
+}
+
+void uartSetup(void) {
+    // 8-N-1
+    outw(0x8000, IO_UART1_MSR);
+    outw(CONFIG_UART_BRSR, IO_UART1_BRSR);
+}
+
+void uartPutc(char ch) {
+    // Wait for room in FIFO
+    while ((inw(IO_UART1_TFCR) & 0x3f) >= 0x20);
+    
+    // Write character
+    outw(ch, IO_UART1_DTRR);
+}
+
+// Unsigned integer to ASCII hexadecimal conversion
+void uartPutHex(unsigned int n) {
+    unsigned int i;
+
+    for (i = 8; i != 0; i--) {
+        unsigned int digit = n >> 28;
+        uartPutc(digit >= 10 ? digit - 10 + 'A' : digit + '0');
+        n <<= 4;
+    }
+}
+
+void uartPuts(const char *str) {
+    char ch;
+    while ((ch = *str++) != '\0') {
+        uartPutc(ch);
+    }
+}
+
+void uartGets(char *str, unsigned int size) {
+    for (;;) {
+        char ch;
+        
+        // Wait for FIFO to contain something
+        while ((inw(IO_UART1_RFCR) & 0x3f) == 0);
+        
+        // Read character
+        ch = (char)inw(IO_UART1_DTRR);
+        
+        // Echo character back
+        outw(ch, IO_UART1_DTRR);
+        
+        // If CR, also echo LF, null-terminate, and return
+        if (ch == '\r') {
+            outw('\n', IO_UART1_DTRR);
+            if (size) {
+                *str++ = '\0';
+            }
+            return;
+        }
+        
+        // Append to buffer
+        if (size) {
+            *str++ = ch;
+            --size;
+        }
+    }
+}
+
+int uartPollch(unsigned int ticks) {
+    while (ticks--) {
+        if (inw(IO_UART1_RFCR) & 0x3f) {
+            return inw(IO_UART1_DTRR) & 0xff;
+        }
+    }
+    
+    return -1;
+}
+
+bool uartAvailable(void)
+{
+    return (inw(IO_UART1_RFCR) & 0x3f)?true:false;
+}
+
+void uartHeartbeat(void)
+{
+    char data[5] = {0x11, 0x30, 0x11^0x30, 0x11+0x30, '\0'};
+    uartPuts(data);
+}
+
+void uartSendData(char* data, int len)
+{
+    int i;
+    for(i=0;i<len;i++)
+        uartPutc(data[i]);
+}
diff --git a/firmware/target/arm/olympus/mrobe-500/uart-target.h b/firmware/target/arm/olympus/mrobe-500/uart-target.h
new file mode 100644
index 0000000000..3b765d3ed8
--- /dev/null
+++ b/firmware/target/arm/olympus/mrobe-500/uart-target.h
@@ -0,0 +1,30 @@
+/*

+ * (C) Copyright 2007 Catalin Patulea <cat@vv.carleton.ca>

+ *

+ * This program is free software; you can redistribute it and/or

+ * modify it under the terms of the GNU General Public License as

+ * published by the Free Software Foundation; either version 2 of

+ * the License, or (at your option) any later version.

+ *

+ * This program is distributed in the hope that it will be useful,

+ * but WITHOUT ANY WARRANTY; without even the implied warranty of

+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+ * GNU General Public License for more details.

+ *

+ * You should have received a copy of the GNU General Public License

+ * along with this program; if not, write to the Free Software

+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,

+ * MA 02111-1307 USA

+ *

+ */

+#ifndef UART_H

+#define UART_H

+

+void uartPutc(char ch);

+void uartPutHex(unsigned int n);

+void uartSetup(void);

+void uartPuts(const char *str);

+void uartGets(char *str, unsigned int size);

+int  uartPollch(unsigned int ticks);

+

+#endif