JLink support for non-7-cycle state moves by Dick Hollenbeck <dick@softplc.com>

git-svn-id: svn://svn.berlios.de/openocd/trunk@1826 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/jtag/jlink.c b/src/jtag/jlink.c
index 90fb42c4cfc7ca53e84bfc17ef8ceefcfed00e70..10563a0d9063defd7835a17fe3e4dad2b9ea4ee6 100644 (file)
--- a/src/jtag/jlink.c
+++ b/src/jtag/jlink.c
@@ -39,6 +39,11 @@
 #define JLINK_USB_TIMEOUT              1000
 
 // See Section 1.3.2 of the Segger JLink USB protocol manual
+/* 2048 is the max value we can use here */
+//#define JLINK_TAP_BUFFER_SIZE 2048
+#define JLINK_TAP_BUFFER_SIZE 256
+//#define JLINK_TAP_BUFFER_SIZE 384
+
 #define JLINK_IN_BUFFER_SIZE                   2048
 #define JLINK_OUT_BUFFER_SIZE                  2*2048+4
 #define JLINK_EMU_RESULT_BUFFER_SIZE   64
@@ -412,6 +417,8 @@ static void jlink_runtest(int num_cycles)
 
        tap_state_t saved_end_state = tap_get_end_state();
 
+       jlink_tap_ensure_space(1,num_cycles + 16);
+
        /* only do a state_move when we're not already in IDLE */
        if (tap_get_state() != TAP_IDLE)
        {
@@ -438,7 +445,7 @@ static void jlink_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_s
 {
        tap_state_t saved_end_state;
 
-       jlink_tap_ensure_space(1, scan_size + 8);
+       jlink_tap_ensure_space(1, scan_size + 16);
 
        saved_end_state = tap_get_end_state();
 
@@ -604,8 +611,6 @@ static int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, ch
 /***************************************************************************/
 /* J-Link tap functions */
 
-/* 2048 is the max value we can use here */
-#define JLINK_TAP_BUFFER_SIZE 1024
 
 static unsigned tap_length=0;
 static u8 tms_buffer[JLINK_TAP_BUFFER_SIZE];
@@ -634,7 +639,7 @@ static void jlink_tap_init(void)
 static void jlink_tap_ensure_space(int scans, int bits)
 {
        int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
-       int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 64;
+       int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 32;
 
        if (scans > available_scans || bits > available_bits)
        {
@@ -649,6 +654,7 @@ static void jlink_tap_append_step(int tms, int tdi)
        if (index >= JLINK_TAP_BUFFER_SIZE)
        {
                LOG_ERROR("jlink_tap_append_step: overflow");
+               *(u32 *)0xFFFFFFFF = 0;
                exit(-1);
        }