--- /dev/null
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * 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 <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "ccdbg-debug.h"
+#include "cc-bitbang.h"
+
+#define CP_USB_ASYNC
+
+#ifdef CP_USB_ASYNC
+#include "cp-usb-async.h"
+#else
+#include "cp-usb.h"
+#endif
+
+struct cc_bitbang {
+#ifdef CP_USB_ASYNC
+ struct cp_usb_async *cp_async;
+#else
+ struct cp_usb *cp;
+#endif
+};
+
+static uint32_t cc_clock_us = CC_CLOCK_US;
+static uint32_t cc_reset_us = CC_RESET_US;
+
+void
+cc_bitbang_set_clock(uint32_t us)
+{
+ cc_clock_us = us;
+}
+
+void
+cc_bitbang_half_clock(struct cc_bitbang *bb)
+{
+ struct timespec req, rem;
+ req.tv_sec = (cc_clock_us / 2) / 1000000;
+ req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000;
+ nanosleep(&req, &rem);
+}
+
+void
+cc_bitbang_wait_reset(struct cc_bitbang *bb)
+{
+ struct timespec req, rem;
+
+ cc_bitbang_sync(bb);
+ req.tv_sec = (cc_reset_us) / 1000000;
+ req.tv_nsec = ((cc_reset_us) % 1000000) * 1000;
+ nanosleep(&req, &rem);
+}
+
+struct cc_bitbang *
+cc_bitbang_open(void)
+{
+ struct cc_bitbang *bb;
+
+ bb = calloc(sizeof (struct cc_bitbang), 1);
+ if (!bb) {
+ perror("calloc");
+ return NULL;
+ }
+#ifdef CP_USB_ASYNC
+ bb->cp_async = cp_usb_async_open();
+ if (!bb->cp_async) {
+ free (bb);
+ return NULL;
+ }
+#else
+ bb->cp = cp_usb_open ();
+ if (!bb->cp) {
+ free (bb);
+ return NULL;
+ }
+#endif
+ return bb;
+}
+
+void
+cc_bitbang_close(struct cc_bitbang *bb)
+{
+#ifdef CP_USB_ASYNC
+ cp_usb_async_close(bb->cp_async);
+#else
+ cp_usb_close(bb->cp);
+#endif
+ free (bb);
+}
+
+void
+cc_bitbang_debug_mode(struct cc_bitbang *bb)
+{
+ /* force two rising clocks while holding RESET_N low */
+ ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
+ ccdbg_debug(CC_DEBUG_COMMAND, "# Debug mode\n");
+ ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
+ cc_bitbang_wait_reset(bb);
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_DATA|CC_RESET_N);
+ cc_bitbang_wait_reset(bb);
+}
+
+void
+cc_bitbang_reset(struct cc_bitbang *bb)
+{
+ ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
+ ccdbg_debug(CC_DEBUG_COMMAND, "# Reset\n");
+ ccdbg_debug(CC_DEBUG_COMMAND, "#\n");
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_wait_reset(bb);
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA );
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
+ cc_bitbang_wait_reset(bb);
+}
+
+int
+cc_bitbang_write(struct cc_bitbang *bb, uint8_t mask, uint8_t value)
+{
+#ifdef CP_USB_ASYNC
+ cp_usb_async_write(bb->cp_async, mask, value);
+#else
+ cp_usb_write(bb->cp, mask, value);
+#endif
+ return 0;
+}
+
+void
+cc_bitbang_read(struct cc_bitbang *bb, uint8_t *valuep)
+{
+#ifdef CP_USB_ASYNC
+ cp_usb_async_read(bb->cp_async, valuep);
+#else
+ *valuep = cp_usb_read(bb->cp);
+#endif
+}
+
+void
+cc_bitbang_sync(struct cc_bitbang *bb)
+{
+#ifdef CP_USB_ASYNC
+ cp_usb_async_sync(bb->cp_async);
+#endif
+}
+
+static char
+is_bit(uint8_t get, uint8_t mask, char on, uint8_t bit)
+{
+ if (mask&bit) {
+ if (get&bit)
+ return on;
+ else
+ return '.';
+ } else
+ return '-';
+}
+
+void
+cc_bitbang_print(char *format, uint8_t mask, uint8_t set)
+{
+ ccdbg_debug (CC_DEBUG_BITBANG, format,
+ is_bit(set, mask, 'C', CC_CLOCK),
+ is_bit(set, mask, 'D', CC_DATA),
+ is_bit(set, mask, 'R', CC_RESET_N));
+}
+
+void
+cc_bitbang_send(struct cc_bitbang *bb, uint8_t mask, uint8_t set)
+{
+ cc_bitbang_write(bb, mask, set);
+ cc_bitbang_print("%c %c %c\n", mask, set);
+ cc_bitbang_half_clock(bb);
+}
+
+void
+cc_bitbang_send_bit(struct cc_bitbang *bb, uint8_t bit)
+{
+ if (bit) bit = CC_DATA;
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, CC_CLOCK|bit|CC_RESET_N);
+ cc_bitbang_send(bb, CC_CLOCK|CC_DATA|CC_RESET_N, bit|CC_RESET_N);
+}
+
+void
+cc_bitbang_send_byte(struct cc_bitbang *bb, uint8_t byte)
+{
+ int bit;
+ ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Send Byte 0x%02x\n#\n", byte);
+ for (bit = 7; bit >= 0; bit--) {
+ cc_bitbang_send_bit(bb, (byte >> bit) & 1);
+ if (bit == 3)
+ ccdbg_debug(CC_DEBUG_BITBANG, "\n");
+ }
+ cc_bitbang_sync(bb);
+}
+
+void
+cc_bitbang_send_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes)
+{
+ while (nbytes--)
+ cc_bitbang_send_byte(bb, *bytes++);
+}
+
+void
+cc_bitbang_recv_bit(struct cc_bitbang *bb, int first, uint8_t *bit)
+{
+ uint8_t mask = first ? CC_DATA : 0;
+
+ cc_bitbang_send(bb, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
+ cc_bitbang_read(bb, bit);
+ cc_bitbang_send(bb, CC_CLOCK| CC_RESET_N, CC_RESET_N);
+}
+
+void
+cc_bitbang_recv_byte(struct cc_bitbang *bb, int first, uint8_t *bytep)
+{
+ uint8_t byte = 0;
+ uint8_t bits[8];
+ int bit;
+
+ ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv byte\n#\n");
+ for (bit = 0; bit < 8; bit++) {
+ cc_bitbang_recv_bit(bb, first, &bits[bit]);
+ first = 0;
+ }
+ cc_bitbang_sync(bb);
+ for (bit = 0; bit < 8; bit++) {
+ byte = byte << 1;
+ byte |= (bits[bit] & CC_DATA) ? 1 : 0;
+ cc_bitbang_print("#\t%c %c %c\n", CC_DATA, bits[bit]);
+ if (bit == 3)
+ ccdbg_debug(CC_DEBUG_BITBANG, "\n");
+ }
+ ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
+ *bytep = byte;
+}
+
+void
+cc_bitbang_recv_bytes(struct cc_bitbang *bb, uint8_t *bytes, int nbytes)
+{
+ int i;
+ int first = 1;
+ for (i = 0; i < nbytes; i++) {
+ cc_bitbang_recv_byte(bb, first, &bytes[i]);
+ first = 0;
+ }
+}
projects / fw / altos / blobdiff