Makefile.am: Remove unneeded duplication.

[sigrok-firmware-fx2lafw.git] / hantek_6022be.c

diff --git a/hantek_6022be.c b/hantek_6022be.c
index 190ba89e713d3fbc9d89204c88be6383f25c1355..e089e96996c05eeafca9629a84f38360ba1c16d7 100644 (file)
--- a/hantek_6022be.c
+++ b/hantek_6022be.c
@@ -243,7 +243,7 @@ static BOOL set_samplerate(BYTE rate)
        IFCONFIG = samplerates[i].ifcfg;
 
        AUTOPTRSETUP = 7;
-       AUTOPTRH2 = 0xE4;
+       AUTOPTRH2 = 0xE4; /* 0xE400: GPIF waveform descriptor 0. */
        AUTOPTRL2 = 0x00;
 
        /*
@@ -260,6 +260,7 @@ static BOOL set_samplerate(BYTE rate)
         * jump 0, CTL2=Z, FIFO, LOOP
         */
 
+       /* LENGTH / BRANCH 0-7 */
        EXTAUTODAT2 = samplerates[i].wait0;
        EXTAUTODAT2 = samplerates[i].wait1;
        EXTAUTODAT2 = 1;
@@ -269,24 +270,27 @@ static BOOL set_samplerate(BYTE rate)
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
 
+       /* OPCODE 0-7 */
        EXTAUTODAT2 = samplerates[i].opc0;
        EXTAUTODAT2 = samplerates[i].opc1;
-       EXTAUTODAT2 = 1;
+       EXTAUTODAT2 = 1; /* DATA=0 DP=1 */
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
 
+       /* OUTPUT 0-7 */
        EXTAUTODAT2 = samplerates[i].out0;
-       EXTAUTODAT2 = 0x44;
-       EXTAUTODAT2 = 0x44;
-       EXTAUTODAT2 = 0x00;
-       EXTAUTODAT2 = 0x00;
-       EXTAUTODAT2 = 0x00;
-       EXTAUTODAT2 = 0x00;
-       EXTAUTODAT2 = 0x00;
+       EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
+       EXTAUTODAT2 = 0x44; /* OE0=1, CTL0=1 */
+       EXTAUTODAT2 = 0;
+       EXTAUTODAT2 = 0;
+       EXTAUTODAT2 = 0;
+       EXTAUTODAT2 = 0;
+       EXTAUTODAT2 = 0;
 
+       /* LOGIC FUNCTION 0-7 */
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
        EXTAUTODAT2 = 0;
@@ -382,8 +386,8 @@ static void init(void)
        EP8CFG = 0;
 
        /* In idle mode tristate all outputs. */
-       GPIFIDLECTL = 0x00;
-       GPIFCTLCFG = 0x80;
+       GPIFIDLECTL = 0x00; /* Don't enable CTL0-5 outputs. */
+       GPIFCTLCFG = 0x80; /* TRICTL=1. CTL0-2: CMOS outputs, tri-statable. */
        GPIFWFSELECT = 0x00;
        GPIFREADYSTAT = 0x00;
 
@@ -417,7 +421,7 @@ static void main(void)
 
        /* Init timer2. */
        RCAP2L = -500 & 0xff;
-       RCAP2H = (-500 >> 8) & 0xff;
+       RCAP2H = (-500 & 0xff00) >> 8;
        T2CON = 0;
        ET2 = 1;
        TR2 = 1;