improved documentation, added stdio_init_all()

src/A1/gpio.c

@@ -10,12 +10,13 @@ volatile uint32_t* sio_base = (uint32_t *)0xd0000000;
 
 /** Configures the pin to be in the given mode using IO_BANK0
  *  @param pin id of the gpio pin, make sure that it is between 0 and 31
- *  @param function function of the pin. Functions are predefined as GPIO_FUNC_...
+ *  @param function function of the pin, make sure it is between 0 and 31. Functions are predefined as GPIO_FUNC_...
  */
 void set_gpio_function(const int pin, const int function)
 {
 	// TODO student:
 	//  - ensure that the pin is between 0 and 29, otherwise return
+	//  - ensure that the function is between 0 and 31, otherwise return
 	//  - configure the pin to use the given function by modifying the IO_BANK0 registers
 	//  ======================================================================
 
@@ -26,7 +27,7 @@ void set_gpio_function(const int pin, const int function)
 	// TODO end ==============================================================
 }
 
-/** Sets the input/output mode of the given pin using the SIO.
+/** Sets the input/output mode of the given pin using the SIO. Furthermore, the input enable bit in the corresponding PADS_BANK0 register is set.
  *  @param pin id of the gpio pin, make sure that it is between 0 and 31
  *  @param mode input/output mode, GPIO_IN for input, GPIO_OUT for output
  */
@@ -35,7 +36,8 @@ void set_gpio_mode(const int pin, const int mode)
 	// TODO student:
 	//  - ensure that the pin is between 0 and 29, otherwise return
 	//  - ensure that a valid mode is given, otherwise return
-	//  - configure weather the pin is an input or output by modifying the SIO registers
+	//  - configure the pin as either an input or output by modifying the SIO registers
+	//  - set the input enable bit in the corresponding PADS_BANK0 register
 	//  Hint: have a look at the OE registers
 	//  ======================================================================
 

src/A1/gpio.h

 #pragma once
 #include <stdint.h>
 
-// GPIO functions, see table 279 in the RP2040 datasheet
+// GPIO functions
 /** Pin is used for SPI */
 #define FUNC_SPI 1
 /** Pin is used for UART */
@@ -35,11 +35,11 @@
 
 /** Configures the pin to be in the given mode using IO_BANK0.
  *  @param pin id of the gpio pin, make sure that it is between 0 and 29
- *  @param function function of the pin. Functions are predefined as GPIO_FUNC_...
+ *  @param function function of the pin, make sure it is between 0 and 31. Functions are predefined as GPIO_FUNC_...
  */
 void set_gpio_function(int pin, int function);
 
-/** Sets the input/output mode of the given pin using the SIO.
+/** Sets the input/output mode of the given pin using the SIO. Furthermore, the input enable bit in the corresponding PADS_BANK0 register is set.
  *  @param pin id of the gpio pin, make sure that it is between 0 and 29
  *  @param mode input/output mode, GPIO_IN for input, GPIO_OUT for output
  */

src/A1/main.c

 #include "vault.h"
 #include <stdio.h>
+#include <pico/stdio.h>
 
 // You can modify this file for local testing, but it will be overridden by the testsystem
 
 int main()
 {
+	stdio_init_all();
 	vault_logic();
 }
\ No newline at end of file

src/A1/vault.c

@@ -11,6 +11,7 @@ void vault_logic()
 //TODO student:
 // - implement the vault logic as described in the assignment
 // - use your functions defined in gpio.c and adc.c
+// - set the ZERO_OFFSET define in vault.h to the correct value for your board
 // Do not use the gpio functions from the RPI Pico SDK.
 // ======================================================================