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https://opencores.org/ocsvn/openrisc/openrisc/trunk
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| Rev 39 |
Rev 45 |
| Line 367... |
Line 367... |
/* counts retries and returns zero if we should abort */
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/* counts retries and returns zero if we should abort */
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static int retry_no = 0;
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static int retry_no = 0;
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int retry_do() {
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int retry_do() {
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unsigned char stalled;
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unsigned char stalled;
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int tap_id_reads = 0;
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//printf("RETRY\n");
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//printf("RETRY\n");
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if (retry_no == 0)
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if (retry_no == 0)
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printf("Communication error. Retrying\n");
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printf("Communication error. Retrying\n");
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| Line 389... |
Line 390... |
return 0;
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return 0;
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}
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}
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*/
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*/
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// Try a readback of the TAP ID
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// Try a readback of the TAP ID
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read_tap:
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// Set ID code instruction in IR
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// Set ID code instruction in IR
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usb_set_tap_ir(JI_IDCODE);
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usb_set_tap_ir(JI_IDCODE);
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// Now read out the IDCODE for the device
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// Now read out the IDCODE for the device
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uint32_t id = usb_read_stream(32, RUN_TEST_IDLE_STATE);
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uint32_t id = usb_read_stream(32, RUN_TEST_IDLE_STATE);
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| Line 401... |
Line 402... |
//Return the chain to DEBUG mode
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//Return the chain to DEBUG mode
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usb_set_tap_ir(JI_DEBUG);
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usb_set_tap_ir(JI_DEBUG);
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if((id&0xffffffff) != (id_read_at_reset&0xffffffff))
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if((id&0xffffffff) != (id_read_at_reset&0xffffffff))
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{
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{
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if (tap_id_reads == 10)
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{
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// Pretty big problem - can't even read the ID of the TAP anymore
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// Pretty big problem - can't even read the ID of the TAP anymore
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// So return error
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// So return error
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printf("Unable to read JTAG TAP ID - read %08x, expected %08x\n", id, id_read_at_reset);
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printf("Unable to read JTAG TAP ID - read %08x, expected %08x\n",
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id, id_read_at_reset);
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return 1;
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return 1;
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}
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}
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tap_id_reads++;
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goto read_tap;
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}
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current_chain = -1;
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current_chain = -1;
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if (retry_no == 1)
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if (retry_no == 1)
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sleep(1);
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sleep(1);
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