Mercurial > avr_jtag

changeset 7:61f27549de57

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Support TRST.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 22 Feb 2009 14:20:57 +0800
parents 42dec3428c77
children 074e860d7d31
files include/cmd_proto.h include/jtag.h py_avrjtag/cmd_proto.py src/avr_jtag.c src/jtag.c
diffstat 5 files changed, 21 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/include/cmd_proto.h	Sun Feb 22 14:12:29 2009 +0800
+++ b/include/cmd_proto.h	Sun Feb 22 14:20:57 2009 +0800
@@ -9,6 +9,7 @@
     CPCMD_SHIFT_TDI,
     CPCMD_SHIFT_TMS,
     CPCMD_SHIFT_TDI_TDO,
+    CPCMD_TRST,
     CPCMD_PONG,
     CPCMD_DATA,
     CPCMD_ACK,
--- a/include/jtag.h	Sun Feb 22 14:12:29 2009 +0800
+++ b/include/jtag.h	Sun Feb 22 14:20:57 2009 +0800
@@ -9,8 +9,10 @@
 #define JTAG_TMS PINB1
 #define JTAG_TDI PINB2
 #define JTAG_TDO PINB3
+#define JTAG_TRST PINB4
 
 extern void jtag_init(void);
+extern void jtag_trst(void);
 extern void jtag_tms(char *buf, int nbits);
 extern void jtag_shift(char *buf, int nbits);
 extern void jtag_shift_inout(char *ibuf, char *obuf, int nbits);
--- a/py_avrjtag/cmd_proto.py	Sun Feb 22 14:12:29 2009 +0800
+++ b/py_avrjtag/cmd_proto.py	Sun Feb 22 14:20:57 2009 +0800
@@ -4,10 +4,11 @@
 CPCMD_SHIFT_TDI = 2
 CPCMD_SHIFT_TMS = 3
 CPCMD_SHIFT_TDI_TDO = 4
-CPCMD_PONG = 5
-CPCMD_DATA = 6
-CPCMD_ACK = 7
-CPCMD_NAK = 8
+CPCMD_TRST = 5
+CPCMD_PONG = 6
+CPCMD_DATA = 7
+CPCMD_ACK = 8
+CPCMD_NAK = 9
 
 def csum_add(csum, c):
     return (((csum << 3) | (csum >> 5)) ^ c) & 0xff
--- a/src/avr_jtag.c	Sun Feb 22 14:12:29 2009 +0800
+++ b/src/avr_jtag.c	Sun Feb 22 14:20:57 2009 +0800
@@ -120,6 +120,13 @@
 	    send_client(client_buf, bsz);
 	    break;
 	    
+	case CPCMD_TRST:
+	    jtag_trst();
+	    bsz = cmd_proto_cmd_fill(client_buf, cmd->seq,
+				     CPCMD_ACK, 0);
+	    send_client(client_buf, bsz);
+	    break;
+	    
 	default:
 	    sprintf(buf, "CODE 0x%02x", cmd->code);
 	    nak(cmd->seq, buf);
--- a/src/jtag.c	Sun Feb 22 14:12:29 2009 +0800
+++ b/src/jtag.c	Sun Feb 22 14:20:57 2009 +0800
@@ -30,6 +30,12 @@
     } while(0)
 #define GET_TDO() (JTAG_PIN & _BV(JTAG_TDO))
 
+void jtag_trst(void) {
+    SEND_BIT(JTAG_TRST, 1);
+    TCK_LO();
+    pin_lo(JTAG_PORT, JTAG_TRST);
+}
+
 /*!
  * Before shifting registers, TAP controller must move to last state before
  * shift state.  The state machine transite to shift state when shifting