Diff: main.cpp

Revision:

0:111cba7b0520

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu May 26 09:04:10 2016 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "mDot.h"
+
+
+#define GPIO_PORT   PA_0
+
+RawSerial pc(PA_2,NC);
+
+// results:
+//              default  pullup  pulldown  pullnone  open drain
+// battery + close 0.00    0.00      0.00      0.00        0.00
+// battery + open  1.55    3.01      0.01  drifting    drifting
+// mdk + open      0.00    0.00      0.00      0.00        0.00
+// mdk + close     3.30    3.21      2.26      3.12        3.30
+//
+// conclusion: mdk has something connected to PA_0
+
+// https://developer.mbed.org/users/n0tform3/code/HelloWorld_IKS01A1/docs/1c6281289d67/stm32f4xx_8h_source.html
+
+
+void print_gpio_pa0_config(void) {
+
+        pc.printf("MODER %x\r\n",GPIOA->MODER&0x3);
+        pc.printf("OTYPER %x\r\n",GPIOA->OTYPER&0x1);
+        pc.printf("OSPEEDR %x\r\n",GPIOA->OSPEEDR&0x3);
+        pc.printf("PUPDR %x\r\n",GPIOA->PUPDR&0x3);
+        pc.printf("IDR %x\r\n",GPIOA->IDR&0x1);
+        pc.printf("ODR %x\r\n",GPIOA->ODR&0x1);
+        pc.printf("BSRR %x\r\n",GPIOA->BSRR&0x1);
+        pc.printf("LCKR %x\r\n",GPIOA->LCKR&0x1);
+        pc.printf("AFR[0] %x\r\n",GPIOA->AFR[0]&0xf);
+}
+    
+main() {
+    
+   pc.baud(115200);
+    
+    pc.printf("Build: " __DATE__ ", " __TIME__"\r\n");
+    
+    DigitalIn gpio_sensor(GPIO_PORT);
+    pc.printf("pin mode: default\r\n");
+    print_gpio_pa0_config();
+    wait(10);
+    
+    // uint32_t lock = GPIOA->LCKR;
+    // pc.printf("Read %x\r\n",lock);
+    
+    while(1) {
+         
+         gpio_sensor.mode(PullUp);
+         pc.printf("pin mode: pullup\r\n");
+         print_gpio_pa0_config();
+         wait(10);
+        
+         gpio_sensor.mode(PullDown);
+         pc.printf("pin mode: pulldown\r\n");
+         print_gpio_pa0_config();
+         wait(10);
+         
+         gpio_sensor.mode(PullNone);
+         pc.printf("pin mode: pullnone\r\n");
+         print_gpio_pa0_config();
+         wait(10);
+         
+         gpio_sensor.mode(OpenDrain);
+         pc.printf("pin mode: opendrain\r\n");
+         print_gpio_pa0_config();
+         wait(10);
+    }
+}
\ No newline at end of file