complete pin abstraction

circuit/README.md

@@ -374,10 +374,50 @@ OK, enough for that wakeup, now I'm going to try to boot the USB CDC driver. Thi
 
 So, USB is a protocol, UART over USB is what the USB CDC lets you do. This is reductionist - and this also takes up some chunk of processor time, as far as I know - however, the chip has a USB peripheral, so I imagine most of the work is offloaded there. I would be tangentially interested in integrating a USB->Serial chip to compare processor overhead for the USB CDC implementation, but what am I trying to do here? Not that.
 
+I couldn't get this running, not sure if that was about my clock, or what - but after one day lost, I give up. I'm going to build a USB -> UART RS485 Bridge (I also need a power injector, so this is all good) and go forwards with port testing and setup.
 
+## Port Abstractions
 
-USB CDC, interrupts
-CDC, / mods pipe -> pass objects don't parse characters: key: value
+Pins are on Ports, UARTS are on Ports, everything is confusing and ugly if we just write C and bang on registers.
 
-Writeup PR2, do encoder?
-or, do 2nd board, do uart return test, order next boards, dream of experiments
+```C
+
+#ifndef PIN_H_
+#define PIN_H_
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "ASF/sam/utils/cmsis/sams70/include/sams70n20.h"
+
+typedef struct{
+  Pio *port;
+  uint32_t pin_bm;
+}pin_t;
+
+pin_t pin_new(Pio *port, uint32_t pin_bitmask);
+
+#endif /* PIN_H_ */
+```
+
+and
+
+```C
+#include "pin.h"
+#include <asf.h>
+
+pin_t pin_new(Pio *port, uint32_t pin_bitmask){
+  pin_t pin;
+  
+  pin.port = port;
+  pin.pin_bm = pin_bitmask;
+  
+  return pin;
+}
+
+void pin_output(pin_t pin){
+}
+```
+
+to begin abstracting pins - just a struct
\ No newline at end of file

embedded/atsams70-tinyrouter/atsams70-tinyrouter/src/config/conf_board.h

@@ -11,4 +11,14 @@
 #ifndef CONF_BOARD_H
 #define CONF_BOARD_H
 
+#  define BOARD_FREQ_SLCK_XTAL      (32768UL)
+
+#  define BOARD_FREQ_SLCK_BYPASS    (32768UL)
+
+#  define BOARD_FREQ_MAINCK_XTAL    (12000000UL)
+
+#  define BOARD_FREQ_MAINCK_BYPASS  (12000000UL)
+
+#  define BOARD_OSC_STARTUP_US      (15625UL)
+
 #endif // CONF_BOARD_H

embedded/atsams70-tinyrouter/atsams70-tinyrouter/src/main.c

@@ -32,6 +32,8 @@
 #include "pin.h"
 
 pin_t stlb;
+pin_t stlr;
+pin_t button;
 
 int main (void)
 {
@@ -41,20 +43,24 @@ int main (void)
 	sysclk_init();
 	
 	PMC->PMC_PCER0 = 1 << ID_PIOA;
+	PMC->PMC_PCER0 = 1 << ID_PIOD;
 	
 	stlb = pin_new(PIOA, PIO_PER_P1);
+	pin_output(stlb);
 	
-	stlb.port->PIO_PER = stlb.pin_bm;
-	stlb.port->PIO_OER = stlb.pin_bm;
+	stlr = pin_new(PIOD, PIO_PER_P11);
+	pin_output(stlr);
 	
-	PIOA->PIO_PER = PIO_PER_P15;
-	PIOA->PIO_ODR = PIO_PER_P15;
+	button = pin_new(PIOA, PIO_PER_P15);
+	pin_input(button);
 	
 	while(1){
-		if(PIOA->PIO_PDSR & PIO_PER_P15){
-			stlb.port->PIO_CODR = stlb.pin_bm;
+		if(pin_get_state(button)){
+			pin_clear(stlb);
+			pin_set(stlr);
 		} else {
-			stlb.port->PIO_SODR = stlb.pin_bm;
+			pin_set(stlb);
+			pin_clear(stlr);
 		}
 	}
 }

embedded/atsams70-tinyrouter/atsams70-tinyrouter/src/pin.c

@@ -16,3 +16,29 @@ pin_t pin_new(Pio *port, uint32_t pin_bitmask){
 	
 	return pin;
 }
+
+void pin_output(pin_t pin){
+	pin.port->PIO_PER |= pin.pin_bm;
+	pin.port->PIO_OER = pin.pin_bm;
+}
+
+void pin_set(pin_t pin){
+	pin.port->PIO_SODR = pin.pin_bm;
+}
+
+void pin_clear(pin_t pin){
+	pin.port->PIO_CODR = pin.pin_bm;
+}
+
+void pin_input(pin_t pin){
+	pin.port->PIO_PER |= pin.pin_bm;
+	pin.port->PIO_ODR = pin.pin_bm;
+}
+
+bool pin_get_state(pin_t pin){
+	if(pin.port->PIO_PDSR & pin.pin_bm){
+		return true;
+	} else {
+		return false;
+	}
+}
\ No newline at end of file

embedded/atsams70-tinyrouter/atsams70-tinyrouter/src/pin.h

@@ -22,4 +22,11 @@ typedef struct{
 
 pin_t pin_new(Pio *port, uint32_t pin_bitmask);
 
+void pin_output(pin_t pin); // set as output
+void pin_set(pin_t pin);
+void pin_clear(pin_t pin);
+
+void pin_input(pin_t pin);
+bool pin_get_state(pin_t pin);
+
 #endif /* PIN_H_ */
\ No newline at end of file