From 3f749a62f88fa4468eaff4680ab7eb15951f6379 Mon Sep 17 00:00:00 2001
From: Jake <jake.read@cba.mit.edu>
Date: Tue, 24 Jul 2018 19:25:00 -0400
Subject: [PATCH] xmega eventsys clock propagation
---
README.md | 2 +
circuit/README.md | 4 +-
circuit/atkrouter-v01/eagle.epf | 8 +--
embedded/README.md | 7 ++-
embedded/atkrouter/.vs/atkrouter/v14/.atsuo | Bin 72704 -> 45056 bytes
embedded/atkrouter/atkrouter/atkrouter.cproj | 4 +-
embedded/atkrouter/atkrouter/main.c | 58 ++++++++++++++++++-
7 files changed, 74 insertions(+), 9 deletions(-)
diff --git a/README.md b/README.md
index c7644b9..65d840a 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ This is a message passing device and USB link for the [automatakit](https://gitl
+The board includes one USB-to-UART Bridge, a CP2102n, *which is treated as the router's 6th port*.
+
## Development Notes
See [circuit chatter](/circuit) and [firmware chatter](/embedded).
diff --git a/circuit/README.md b/circuit/README.md
index 63d6b45..77e1921 100644
--- a/circuit/README.md
+++ b/circuit/README.md
@@ -8,4 +8,6 @@ The circuit uses an ATxmega256A3U microcontroller and it's UART modules to chatt
# Notes
- - 0.1uF cap near CP2102n is too close, can't place
\ No newline at end of file
+ - 0.1uF cap near CP2102n is too close, can't place
+ - silk port labels are under ports
+ - clkout has to be pin7 on C, E or D
\ No newline at end of file
diff --git a/circuit/atkrouter-v01/eagle.epf b/circuit/atkrouter-v01/eagle.epf
index f414bc7..07d789a 100644
--- a/circuit/atkrouter-v01/eagle.epf
+++ b/circuit/atkrouter-v01/eagle.epf
@@ -40,7 +40,7 @@ UsedLibrary="C:/EAGLE 8.3.2/lbr/ltspice/sym.lbr"
Type="Board Editor"
Number=3
File="atkrouter-v01.brd"
-View="-5.94496 21.7574 107.847 82.1959"
+View="34.5202 60.3024 52.8983 70.0636"
WireWidths=" 0.0762 0.1016 0.127 0.15 0.2 0.2032 0.4064 0.6096 0.8128 1.27 2.54 0.508 0.254 0.3048 1.016 0.1524"
PadDiameters=" 0.254 0.3048 0.4064 0.6096 0.8128 1.016 1.27 1.4224 1.6764 1.778 1.9304 2.1844 2.54 3.81 6.4516 0"
PadDrills=" 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.65 0.7 0.75 0.8 0.85 0.9 1 0.6"
@@ -78,13 +78,13 @@ SwapLevel=0
ArcDirection=0
AddLevel=2
PadsSameType=0
-Layer=48
+Layer=47
[Win_2]
Type="Schematic Editor"
Number=1
File="atkrouter-v01.sch"
-View="-58.1526 -5.84485 208.12 165.332"
+View="13.2075 13.1224 141.618 95.6731"
WireWidths=" 0.0762 0.1016 0.127 0.15 0.2 0.2032 0.254 0.3048 0.4064 0.508 0.6096 0.8128 1.016 1.27 2.54 0.1524"
PadDiameters=" 0.254 0.3048 0.4064 0.6096 0.8128 1.016 1.27 1.4224 1.6764 1.778 1.9304 2.1844 2.54 3.81 6.4516 0"
PadDrills=" 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.65 0.7 0.75 0.8 0.85 0.9 1 0.6"
@@ -123,7 +123,7 @@ ArcDirection=0
AddLevel=2
PadsSameType=0
Layer=91
-Views=" 1: -58.1526 -5.84485 208.12 165.332"
+Views=" 1: 13.2075 13.1224 141.618 95.6731"
Sheet="1"
[Win_3]
diff --git a/embedded/README.md b/embedded/README.md
index 70ba3df..ca9a0ac 100644
--- a/embedded/README.md
+++ b/embedded/README.md
@@ -4,4 +4,9 @@ Firmware for the board follows the [automatakit](https://gitlab.cba.mit.edu/jake
Communication is handled asynchronously: bytes received on the UART are loaded into a ringbuffer, where they are later parsed in to packets. Parsing happens as oven as possible.
-...
\ No newline at end of file
+Now, to start with clocking.
+
+## 0th port:
+
+This is kind of confusing, and I think it's worthwhile to re-write this so that the router is actually the head.
+
diff --git a/embedded/atkrouter/.vs/atkrouter/v14/.atsuo b/embedded/atkrouter/.vs/atkrouter/v14/.atsuo
index dda766cbda3e1df81cbb5ab604dddf255fa0b9bf..d7252afd6d4a60bedfb0a03b0c97348ed6780001 100644
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diff --git a/embedded/atkrouter/atkrouter/atkrouter.cproj b/embedded/atkrouter/atkrouter/atkrouter.cproj
index 93c010b..a88c72e 100644
--- a/embedded/atkrouter/atkrouter/atkrouter.cproj
+++ b/embedded/atkrouter/atkrouter/atkrouter.cproj
@@ -41,7 +41,7 @@
</framework-data>
</AsfFrameworkConfig>
<avrtool>com.atmel.avrdbg.tool.atmelice</avrtool>
- <avrtoolserialnumber>J41800087098</avrtoolserialnumber>
+ <avrtoolserialnumber>J41800086407</avrtoolserialnumber>
<avrdeviceexpectedsignature>0x1E9842</avrdeviceexpectedsignature>
<com_atmel_avrdbg_tool_atmelice>
<ToolOptions>
@@ -51,7 +51,7 @@
<InterfaceName>PDI</InterfaceName>
</ToolOptions>
<ToolType>com.atmel.avrdbg.tool.atmelice</ToolType>
- <ToolNumber>J41800087098</ToolNumber>
+ <ToolNumber>J41800086407</ToolNumber>
<ToolName>Atmel-ICE</ToolName>
</com_atmel_avrdbg_tool_atmelice>
<avrtoolinterface>PDI</avrtoolinterface>
diff --git a/embedded/atkrouter/atkrouter/main.c b/embedded/atkrouter/atkrouter/main.c
index 3a3190e..69a7cad 100644
--- a/embedded/atkrouter/atkrouter/main.c
+++ b/embedded/atkrouter/atkrouter/main.c
@@ -18,14 +18,69 @@
// do cp2102n
void clock_init(void){
+
OSC.XOSCCTRL = OSC_XOSCSEL_XTAL_256CLK_gc | OSC_FRQRANGE_12TO16_gc; // select external source
OSC.CTRL = OSC_XOSCEN_bm; // enable external source
while(!(OSC.STATUS & OSC_XOSCRDY_bm)); // wait for external
- OSC.PLLCTRL = OSC_PLLSRC_XOSC_gc | OSC_PLLFAC0_bm | OSC_PLLFAC1_bm; // select external osc for pll, do pll = source * 3
+ OSC.PLLCTRL = OSC_PLLSRC_XOSC_gc | 3; // select external osc for pll, do pll = source * 3
OSC.CTRL |= OSC_PLLEN_bm; // enable PLL
while (!(OSC.STATUS & OSC_PLLRDY_bm)); // wait for PLL to be ready
CCP = CCP_IOREG_gc; // enable protected register change
CLK.CTRL = CLK_SCLKSEL_PLL_gc; // switch to PLL for main clock
+ /*
+ OSC.PLLCTRL = OSC_PLLFAC4_bm | OSC_PLLFAC3_bm; // 2 MHz * 24 = 48 MHz
+ OSC.CTRL = OSC_PLLEN_bm; // enable PLL
+ while (!(OSC.STATUS & OSC_PLLRDY_bm)); // wait for PLL to be ready
+ CCP = CCP_IOREG_gc; // enable protected register change
+ CLK.CTRL = CLK_SCLKSEL_PLL_gc; // switch to PLL
+ */
+}
+
+#define ATKTIMER_MODE_MASTER 1
+#define ATKTIMER_MODE_SLAVE 0
+#define ATKTIMER_MODE_RING 2
+
+void atktimer_init(uint8_t mode){
+ /*
+ in this test,
+ tx: pin F0 outputs a 1MHz clock on all output lines
+ rx: pin F4 (atk1-clkin) listens to both edges, outputs that event to PE7 (ATK1-tx)
+ */
+ PORTF.DIRSET = PIN0_bm; // this is our clk output pin
+ PORTF.PIN0CTRL = PORT_SRLEN_bm; // slew rate limit to decrease noise (a little bit)
+
+ if(mode == ATKTIMER_MODE_MASTER){
+ // put a 1MHz timer on the clock out lines
+ // clkout pin is PF0, TCF0.CCA
+ TCF0.CTRLA = TC_CLKSEL_DIV1_gc; // one tick is 48MHz
+
+ uint16_t pera = 47; // going for 1MHz
+ uint8_t peral = (uint8_t) pera;
+ uint8_t perah = (uint8_t)(pera >> 8);
+
+ TCF0.CTRLB = TC_WGMODE_FRQ_gc | (1 << 4); // frequency wave mode, and enable CCA channel output
+ // need to set CCA,
+ TCF0.CCABUFL = peral;
+ TCF0.CCABUFH = perah;
+ } else if(mode == ATKTIMER_MODE_SLAVE) {
+ // listen for clock on a port, let's say ATK1 for now, and mirror that on our clock outputs
+ PORTF.DIRCLR = PIN4_bm; // this is ATK1-CLKIN
+ PORTF.PIN4CTRL = PORT_ISC_BOTHEDGES_gc; // sense when falling
+
+ // setup event channel 0 to have EVSYS_CHMUX_PORTD_PIN4_gc as input
+ EVSYS_CH0MUX = EVSYS_CHMUX_PORTF_PIN4_gc;
+ // it seems we can only output events directly on pin7 of ports c, d or e :| (or pin 4 on the same ports)
+ // so output event 0 on port E, pin 7
+ // this will put event channel 0 on a pin, directly - only for as many clock cycles as the event is active. i.e. one
+ //PORTCFG_CLKEVOUT = PORTCFG_EVOUT_PE7_gc;
+
+ TCF0.CTRLA = TC_CLKSEL_EVCH0_gc;
+
+ TCF0.CTRLB = TC_WGMODE_FRQ_gc | (1 << 4); // frequency wave mode, and enable CCA channel output
+ // need to set CCA,
+ TCF0.CCABUFL = 0;
+ TCF0.CCABUFH = 0;
+ }
}
void uarts_init(void){
@@ -98,6 +153,7 @@ void atkps_init(void){
int main(void)
{
clock_init();
+ atktimer_init(ATKTIMER_MODE_MASTER);
uarts_init();
atkps_init();
--
GitLab