Wait for a while when switching the RESET_N line

[fw/altos] / lib / ccdbg-io.c

diff --git a/lib/ccdbg-io.c b/lib/ccdbg-io.c
index 5ecea769c6b4f9c6b1340067ba8be4709f211128..3606c57cf960461d9a19ecfb879e070385c097bb 100644 (file)
--- a/lib/ccdbg-io.c
+++ b/lib/ccdbg-io.c
@@ -18,16 +18,41 @@
 
 #include "ccdbg.h"
 #include <time.h>
+#ifdef CP_USB_ASYNC
+#include "cp-usb-async.h"
+#else
+#include "cp-usb.h"
+#endif
+
+static uint32_t        cc_clock_us = CC_CLOCK_US;
+static uint32_t        cc_reset_us = CC_RESET_US;
+
+void
+ccdbg_set_clock(uint32_t us)
+{
+       cc_clock_us = us;
+}
 
 void
 ccdbg_half_clock(struct ccdbg *dbg)
 {
        struct timespec req, rem;
-       req.tv_sec = (CC_CLOCK_US / 2) / 1000000;
-       req.tv_nsec = ((CC_CLOCK_US / 2) % 1000000) * 1000;
+       req.tv_sec = (cc_clock_us / 2) / 1000000;
+       req.tv_nsec = ((cc_clock_us / 2) % 1000000) * 1000;
        nanosleep(&req, &rem);
 }
 
+void
+ccdbg_wait_reset(struct ccdbg *dbg)
+{
+       struct timespec req, rem;
+       
+       ccdbg_sync_io(dbg);
+       req.tv_sec = (cc_reset_us) / 1000000;
+       req.tv_nsec = ((cc_reset_us) % 1000000) * 1000;
+       nanosleep(&req, &rem);
+}
+       
 struct ccdbg *
 ccdbg_open(void)
 {
@@ -38,32 +63,60 @@ ccdbg_open(void)
                perror("calloc");
                return NULL;
        }
+#ifdef CP_USB_ASYNC
+       dbg->cp_async = cp_usb_async_open();
+       if (!dbg->cp_async) {
+               free (dbg);
+               return NULL;
+       }
+#else
        dbg->cp = cp_usb_open ();
        if (!dbg->cp) {
                free (dbg);
                return NULL;
        }
+#endif
        return dbg;
 }
 
 void
 ccdbg_close(struct ccdbg *dbg)
 {
+#ifdef CP_USB_ASYNC
+       cp_usb_async_close(dbg->cp_async);
+#else
        cp_usb_close(dbg->cp);
+#endif
        free (dbg);
 }
 
 int
 ccdbg_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
 {
+#ifdef CP_USB_ASYNC
+       cp_usb_async_write(dbg->cp_async, mask, value);
+#else
        cp_usb_write(dbg->cp, mask, value);
+#endif
        return 0;
 }
 
-uint8_t
-ccdbg_read(struct ccdbg *dbg)
+void
+ccdbg_read(struct ccdbg *dbg, uint8_t *valuep)
 {
-       return cp_usb_read(dbg->cp);
+#ifdef CP_USB_ASYNC
+       cp_usb_async_read(dbg->cp_async, valuep);
+#else
+       *valuep = cp_usb_read(dbg->cp);
+#endif
+}
+
+void
+ccdbg_sync_io(struct ccdbg *dbg)
+{
+#ifdef CP_USB_ASYNC
+       cp_usb_async_sync(dbg->cp_async);
+#endif
 }
 
 static char
@@ -112,6 +165,7 @@ ccdbg_send_byte(struct ccdbg *dbg, uint8_t byte)
                if (bit == 3)
                        ccdbg_debug(CC_DEBUG_BITBANG, "\n");
        }
+       ccdbg_sync_io(dbg);
 }
 
 void
@@ -121,43 +175,47 @@ ccdbg_send_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
                ccdbg_send_byte(dbg, *bytes++);
 }
 
-uint8_t
-ccdbg_recv_bit(struct ccdbg *dbg, int first)
+void
+ccdbg_recv_bit(struct ccdbg *dbg, int first, uint8_t *bit)
 {
        uint8_t mask = first ? CC_DATA : 0;
-       uint8_t read;
 
        ccdbg_send(dbg, CC_CLOCK|mask|CC_RESET_N, CC_CLOCK|CC_DATA|CC_RESET_N);
-       read = ccdbg_read(dbg);
-       ccdbg_print("#\t%c %c %c\n", CC_DATA, read);
+       ccdbg_read(dbg, bit);
        ccdbg_send(dbg, CC_CLOCK|     CC_RESET_N,                  CC_RESET_N);
-       return (read & CC_DATA) ? 1 : 0;
 }
 
-uint8_t
-ccdbg_recv_byte(struct ccdbg *dbg, int first)
+void
+ccdbg_recv_byte(struct ccdbg *dbg, 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++) {
+               ccdbg_recv_bit(dbg, first, &bits[bit]);
+               first = 0;
+       }
+       ccdbg_sync_io(dbg);
        for (bit = 0; bit < 8; bit++) {
                byte = byte << 1;
-               byte |= ccdbg_recv_bit(dbg, first);
+               byte |= (bits[bit] & CC_DATA) ? 1 : 0;
+               ccdbg_print("#\t%c %c %c\n", CC_DATA, bits[bit]);
                if (bit == 3)
                        ccdbg_debug(CC_DEBUG_BITBANG, "\n");
-               first = 0;
        }
        ccdbg_debug(CC_DEBUG_BITBANG, "#\n# Recv 0x%02x\n#\n", byte);
-       return byte;
+       *bytep = byte;
 }
 
 void
 ccdbg_recv_bytes(struct ccdbg *dbg, uint8_t *bytes, int nbytes)
 {
+       int i;
        int first = 1;
-       while (nbytes--) {
-               *bytes++ = ccdbg_recv_byte(dbg, first);
+       for (i = 0; i < nbytes; i++) {
+               ccdbg_recv_byte(dbg, first, &bytes[i]);
                first = 0;
        }
 }